Publications



Link: Google Scholar Profile for Randy H. Ewoldt

Book Chapter

  1. Ewoldt, R. H., M. T. Johnston, and L. M. Caretta,
    “Experimental challenges of shear rheology: how to avoid bad data,”
    in: Complex Fluids in Biological Systems, S. Spagnolie (Editor), Springer Biological Engineering Series, pp 207-241 (2015).
    DOI   Preprint PDF (errata marked)
    Topic of a recorded webinar: How to avoid bad data in rheology (2016)

Refereed Journal Publications

2024 and in press

  • Eom, W., M. T. Hossain, V. Parasramka, J. Kim, R. W. Y. Siu, K. A. Sanders, D. Piorkowski, A. Lowe, H. G. Koh, M. F. L. De Volder, D. S. Fudge, R. H. Ewoldt and S. H. Tawfick,
    “Printing of Fine, Continuous, and Soft Fibers in Complex 3D Trajectories via Embedded Solvent Exchange,”
    Submitted.
  • Ramwali, N., M. T. Hossain, A. Shetty, and R. H. Ewoldt,
    “Stress-controlled medium-amplitude oscillatory shear (MAOStress) of PVA-Borax,”
    Journal of Rheology, Submitted. arXiv
  • Cooper, J. C., J. E. Paul, N. Ramlawi, C. Saengow, A. Sharma, B. A. Suslick, R. H. Ewoldt, N. R. Sottos, J. S. Moore,
    “Innate Reprocessability in Engineering Thermosets,”
    submitted. ChemRxiv
  • Singh, P.K., and R. H. Ewoldt,
    “On simultaneous fitting of nonlinear and linear rheology data: Preventing a false sense of certainty,”
    submitted. arXiv
  • Lessard, J. J., E. B. Mejia, A. J. Kim, Z. Zhang, M. G. Berkey, Z. S. Medina-Barreto, R. H. Ewoldt, N. R. Sottos, J. S. Moore,
    “Unraveling reactivity differences: room-temperature ring-opening metathesis polymerization (ROMP) versus frontal ROMP,”
    Journal of the American Chemical Society, in press (2024). DOI Link
  • Porath, L. E., N. Ramlawi, J. Huang, M. T. Hossain, M. Derkaloustian, R. H. Ewoldt, and C. M. Evans,
    “Molecular design of multimodal viscoelastic spectra using vitrimers,”
    Chemistry of Materials, 36(4), 1966-1974 (2024). DOI Link
  • Hossain, M. T., and R. H. Ewoldt,
    “Protorheology,”
    Journal of Rheology, 68(1), 113–144 (2024) DOI Link
  • Wang, H. M., B. A. Suslick, J. J. Lessard, C. H. Yu, C. Saengow, R. H. Ewoldt, and J. S. Moore,
    “Frontal polymerization of stereoisomers: distinct microstructures and properties of endo– and exo-dicyclopentadiene thermosets,”
    Macromolecules, 57 (1), 142–149 (2024) DOI Link
  • Sen, S., R. R. Fernandes, and R. H. Ewoldt,
    “Soft glassy materials with tunable extensibility,”
    Soft Matter, 20, 212–223 (2024). DOI Link arXiv
  • Emon, B, M. S. H. Joy, L. Lalonde, A. Ghrayeb, U. Doha, L. Ladehoff, R. Brockstein, C. Saengow, R. H. Ewoldt, M. T. A. Saif,
    “Nuclear deformation regulates YAP dynamics in cancer associated fibroblasts,”
    Acta Biomaterialia, 173 (1), 93-108 (2024) DOI link
  • Zakoworotny, M., F. J Balta Bonner, A. Kumar, J. E. Aw, S. H. Tawfick, R. H. Ewoldt, N. R. Sottos, P. H. Geubelle,
    “Rheological modeling of frontal-polymerization-based direct ink writing of thermoset polymers,”
    Computer Methods in Applied Mechanics and Engineering, 418, 116565 (2024) DOI link

2023

  1. Wang, Y., and R. H. Ewoldt,
    “Thixotropy, antithixotropy, and viscoelasticity in hysteresis,”
    Journal of Rheology, 67(6), 1199-1219 (2023). DOI link arXiv
  2. Huang, J, G. S. Sheridan, C. Chen, N. Ramlawi, R. H. Ewoldt, P. V. Braun, and C. M. Evans, “Reversible dynamics, mesh size, and segmental dynamics control penetrant diffusion in ethylene vitrimers,” ACS Macro Letters, 12, 7, 901–907 (2023) DOI Link
  3. Ji, B., Z. Yang, Z. Wang, R. H. Ewoldt, and J. Feng,
    “Secondary bubble entrainment via primary bubble bursting at a viscoelastic surface,”
    Physical Review Letters, 131, 104002 (2023) DOI Link
    Press: MechSE News, FYFluidDynamics
  4. Piñeiro-Lago, L*, N. Ramlawi*, I. Franco, C. A. Tovar, L. Campo-Deaño, and R. H. Ewoldt,
    “Large amplitude oscillatory shear stress (LAOStress) analysis for an acid-curd Spanish cheese: Afuega’l Pitu atroncau blancu and roxu (PDO),”
    Food Hydrocolloids, 142, 108720 (2023) DOI link
  5. Taylor, L., G. Chaudhary, G. Jain, A. Lowe, A. Hupe, A. Negishi, Y. Zeng, R. H. Ewoldt, and D. Fudge,
    “Mechanisms of gill-clogging by hagfish slime,”
    Journal of the Royal Society Interface, 20, 2020220774 (2023) DOI link
    Press: Phys.org News
  6. Kaur, A. P., B. J. Neyhouse, I. A. Shkrob, Y. Wang, H. H. Attanayake, R. K. Jha, Q. Wu, L. Zhang, R. H. Ewoldt, F. R. Brushett, and S. A. Odom,
    “Concentration-dependent cycling of phenothiazine-based electrolytes in nonaqueous redox flow cells,”
    Chemistry an Asian Journal, 18, e202201171 (2023). DOI link
  7. Huang, J., N. Ramlawi, G. S. Sheridan, C. Chen, R. H. Ewoldt, P. V. Braun, and C. M. Evans,
    “Dynamic Covalent Bond Exchange Enhances Penetrant Diffusion in Dense Vitrimers,”
    Macromolecules, 56(3), 1253-1262 (2023). DOI link
  8. Farag, H., A. P. Kaur, L. A. Robertson, E. Sarnello, X. Liu, Y. Wang, L. Cheng, I. A. Shkrob, L. Zhang, R. H. Ewoldt, T. Li, S. A. Odom, Y Z,
    “Softening by charging: how collective modes of ionic association in concentrated redoxmer/electrolyte solutions define the structural and dynamic properties in different states of charge,”
    Physical Chemistry Chemical Physics, 25, 4243-4254 (2023). DOI link

2022

  1. Sen, S., and R. H. Ewoldt,
    “Thixotropic spectra and Ashby-style charts for thixotropy,”
    Journal of Rheology, 66(5), 1041-1053, (2022). DOI link arXiv
  2. Wang, Y., and R. H. Ewoldt,
    “New insights on carbon black suspension rheology – anisotropic thixotropy and anti-thixotropy,”
    Journal of Rheology, 66(5), 937-953 (2022). DOI link arXiv
  3. Lai, S., G. Chaudhary, Z. Jiang, R. H. Ewoldt, and P Braun,
    “Chemical amplification of sub-threshold base triggers to drive sol-gel transitions in polymers,”
    ACS Materials Letters, 4(8), 1503-1510 (2022) DOI link
  4. Porath, L. E., J. Huang, N. Ramlawi, M. Derkaloustian, R. H. Ewoldt, and C. M. Evans,
    “Relaxation of vitrimers with kinetically distinct mixed dynamic bonds,”
    Macromolecules, 55(11), 4450–4458 (2022) DOI link
  5. Hossain, M. T., and R. H. Ewoldt,
    “Do-it-yourself rheometry,”
    Physics of Fluids 34, 053105 (2022). DOI link Accepted PDF
    Press: AIPMechSE news
    Selected as Featured in Physics of Fluids
  6. Aw, J. E., X. Zhang, A. Z. Nelson, L. M. Dean, M. Yourdkhani, R. H. Ewoldt, P. H. Geubelle, N. R. Sottos,
    “Self-regulative direct ink writing of frontally polymerizing thermoset polymers,”
    Advanced Materials Technologies, 2200230 (2022) DOI link
  7. Nelson, A. Z., Y. Wang, Y. Wang, A. S., Margotta, R. L. Sammler, A. Izmitli, J. S. Katz, J. Curtis-Fisk, Y. Li, and R. H. Ewoldt,
    “Gelation under stress: impact of shear flow on the formation and mechanical properties of methylcellulose hydrogels,”
    Soft Matter, 18, 1554-1565 (2022). DOI link
  8. Ewoldt, R. H., and C. Saengow
    “Designing complex fluids,”
    Annual Review of Fluid Mechanics, 54, 413-441 (2022). DOI link (free e-print URL)
    Invited Review Article
  9. Natalia, I., R. H. Ewoldt, and E. Koos,
    “Particle contact dynamics as the origin for non-integer power expansion rheology in attractive suspension networks,”
    Journal of Rheology, 66(1), 17-30 (2022) DOI link arXiv

2021

  1. Li, M., S. A. Odom, L. A. Robertson, T. P. Vaid, A. R. Pancoast, G. Agarwal, H. A. Doan, Y. Wang, T. M. Suduwella, S. R. Bheemireddy, R. H. Ewoldt, R. S. Assary, L. Zhang, M. S. Sigman, S. D. Minteer,
    “Experimental protocols for studying organic non-aqueous redox flow batteries,”
    ACS Energy Letters, 6, 11, 3932-3943 (2021). DOI link
  2. Wang, C., G. Chaudhary, R. H. Ewoldt, and R. G. Nuzzo,
    “3D Printing High-Resolution Conductive Elastomeric Structures with a Solid Particle-Free Emulsion Ink,”
    Advanced Engineering Materials, 2100902 (2021). DOI link
  3. Zhao, Y., J. Zhang, G. Agarwal, Z. Yu, R. E. Corman, Y. Wang, L. A. Robertson, Z. Shi, H. Doan, R. H. Ewoldt, I. A. Shkrob, R. S. Assary, L. Cheng, V. Srinivasan, S. J. Babinec, and L. Zhang,
    “TEMPO allegro: liquid catholyte redoxmers for nonaqueous redox flow batteries,”
    Journal of Materials Chemistry A, 9(31), 16769-16775 (2021). DOI link
  4. Chaudhary, G., A. Ghosh, J. G. Kang, P. V. Braun, R. H. Ewoldt, and K. S. Schweizer,
    “Linear and nonlinear viscoelasticity of concentrated thermoresponsive microgel suspensions,”
    Journal of Colloid & Interface Science, 601, 886-898 (2021). DOI link
  5. Shkrob, I. A., L. A. Robertson, Z. Yu, R. S. Assary, L. Cheng, L. Zhang, E. Sarnello, X. Liu, T. Li, A. P. Kaur, S. A. Odom, Y. Wang, R. H. Ewoldt, H. M. Farag, and Y. Z,
    “Crowded electrolytes containing redoxmers in different states of charge: solution structure, properties, and fundamental limits on power density,”
    Journal of Molecular Liquids, 334, 116533 (2021). DOI link
  6. Sen, S., A. G. Morales, and R. H. Ewoldt,
    “Thixotropy in viscoplastic drop impact on thin films,”
    Physical Review Fluids, 6, 043301 (2021). DOI link arXiv
  7. Attanayake, N. H., Z. Liang, Y. Wang, A. P. Kaur, S. R. Parkin, J. K. Mobley, R. H. Ewoldt, J. Landon, and S. A. Odom,
    “Dual function organic active materials for nonaqueous redox flow batteries,”
    Materials Advances, 2, 1390-1401 (2021). DOI link
  8. Pei, Y., R. H. Ewoldt, C. M. Zallek, E. T. Hsiao-Wecksler,
    “Design framework and clinical evaluation of a passive hydraulic patient simulator for biceps spasticity assessment training,”
    Journal of Mechanisms and Robotics, 13(4): 041006 (2021). DOI link

2020

  1. Shkrob, I, T. Li, E. Sarnello, L. Robertson, Y. ZHAO, H. Farag, Z. Yu, J. Zhang, S. Bheemireddy, Y Z, R. Assary, R. H. Ewoldt, L. Cheng, and L. Zhang,
    “Self-assembled solute networks in crowded electrolyte solutions and nanoconfinement of charged redoxmer molecules,”
    The Journal of Physical Chemistry B, 124(45), 10226-10236 (2020). DOI link
  2. Chaudhary, G., N. A. Bharadwaj, P. V. Braun, and R. H. Ewoldt,
    “Exploiting nonlinear elasticity for anomalous magnetoresponsive stiffening,”
    ACS Macro Letters, 9(11), 1632–1637 (2020). DOI link
    Press: MechSE
  3. Ramlawi, N., N. A. Bharadwaj, and R. H. Ewoldt,
    “The weakly nonlinear response and non-affine interpretation of the Johnson-Segalman/Gordon-Schowalter model,”
    Journal of Rheology, 64(6), 1409-1424 (2020). DOI link arXiv
  4. Wang, Y., A. P. Kaur, N. H. Attanayake, Z. Yu, T. M. Suduwella, L. Cheng, S. A. Odom, and R. H. Ewoldt,
    “Viscous flow properties and hydrodynamic diameter of phenothiazine-based redox-active molecules in different supporting salt environments,”
    Physics of Fluids, 32, 083108 (2020). DOI link Accepted PDF arXiv
    Selected as an Editor’s Pick
  5. Sen, S., A. G. Morales, and R. H. Ewoldt,
    “Viscoplastic drop impact on thin films,”
    Journal of Fluid Mechanics, 891, A27 (2020). DOI link
  6. Liang, J., Y. Pei, R. H. Ewoldt, S. R. Tippett, and E. T. Hsiao-Wecksler,
    “Passive hydraulic training simulator for upper arm spasticity,”
    ASME: Journal of Mechanisms and Robotics, 12(4), 045001 (2020). DOI link
  7. Natalia, I., R. H. Ewoldt, and E. Koos
    “Questioning a fundamental assumption of rheology: observation of noninteger power expansions,”
    Journal of Rheology, 64(3), 625-635 (2020). DOI link (open access)
  8. Xu, Y., S. Sen, Q. Wu, X. Zhong, R. H. Ewoldt, and S. C. Zimmerman,
    “Base-triggered self-amplifying degradable polyurethanes with the ability to translate local stimulation to continuous long-range degradation,”
    Chemical Science, 11(12), 3326-3331 (2020). DOI link
  9. Renggli, D., A. Alicke, R. H. Ewoldt, and J. Vermant,
    “Operating windows for oscillatory interfacial shear rheology,”
    Journal of Rheology, 64 (1), 141-160 (2020). DOI link (open access)
    Journal of Rheology Publication Award 2021: for the best paper published in the Journal of Rheology during the preceding two years

2019

  1. Corman, R. E., and R. H. Ewoldt,
    “Mapping linear viscoelasticity for design and tactile intuition,”
    Applied Rheology, 29 (1):141–161 (2019). DOI link (open) Accepted PDF
  2. Schuh, J. K., and R. H. Ewoldt,
    “Low Reynolds number friction reduction with polymers and textures,”
    Journal of Non-Newtonian Fluid Mechanics, 273, 104167 (2019). DOI link
  3. Nelson, A. Z., K. S. Schweizer, B. M. Rauzan, R. G. Nuzzo, J. Vermant, and R. H. Ewoldt,
    “Designing and transforming yield-stress fluids,”
    Current Opinion in Solid State and Materials Science, 23 (5), 100758 (2019). DOI link Accepted PDF
    Invited Review
  4. Kim, J., P. K. Singh, J. B. Freund, and R. H. Ewoldt,
    “Uncertainty propagation in simulation predictions of generalized Newtonian fluid flows,”
    Journal of Non-Newtonian Fluid Mechanics, 271, 104138 (2019). DOI link
  5. Singh, P. K., J. M. Soulages, and R. H. Ewoldt,
    “On fitting data for parameter estimates: residual weighting and data representation,”
    Rheologica Acta, 58, 341–359 (2019). DOI link
  6. Chaudhary, G., A. Ghosh, N. A. Bharadwaj, J. G. Kang, P. V. Braun, K. S. Schweizer, and R. H. Ewoldt,
    Thermoresponsive stiffening with microgel particles in a semiflexible fibrin network,”
    Macromolecules, 52 (8), 3029-3041 (2019). DOI link arXiv
  7. Miller, K. A., E. G. Morado, S. R. Samanta, B. A. Walker, A. Z. Nelson, S. Sen, D. T. Tran, D. J. Whitaker, R. H. Ewoldt, P. V. Braun, and S. C. Zimmerman,
    “Acid-triggered, acid-generating, and self-amplifying degradable polymers,”
    Journal of the American Chemical Society, 141 (7) 2838-2842 (2019). DOI link
    Press: Nature
  8. Epstein, E. S., L. Martinetti, R. H. Kollarigowda, O. Carey-De La Torre, J. S. Moore, R. H. Ewoldt, and P. V. Braun,
    “Modulating noncovalent cross-links with molecular switches,”
    Journal of the American Chemical Society, 141 (8), 3597–3604 (2019). DOI link
  9. Lee, Y. H., J. K. Schuh, R. H. Ewoldt, and J. T. Allison,
    “Simultaneous design of non-Newtonian lubricant and surface texture using surrogate-based multiobjective optimization,”
    Structural and Multidisciplinary Optimization, 60 (1), 1–18 (2019). DOI link
  10. Martinetti, L., and R. H. Ewoldt,
    “Time-strain separability in medium-amplitude oscillatory shear,”
    Physics of Fluids, 31 (2), 021213 (2019). DOI link  Accepted PDF
    Dedicated to R. B. Bird on the occasion of his 95th birthday
  11. Chaudhary, G., R. H. Ewoldt, and J.-L. Thiffeault,
    “Unraveling hagfish slime,”
    Journal of the Royal Society Interface, 16(150), 20180710 (2019).  DOI link arXiv
    Press: Science Magazine, New Scientist, Popular Science, Newsweek, Phys.org, UW Madison, ScienceDaily, arsTechnica, The Atlantic
  12. Ghosh, A., G. Chaudhary, J. G. Kang, P. V. Braun, R. H. Ewoldt, and K. S. Schweizer,
    “Linear and nonlinear rheology and structural relaxation in dense glassy and jammed soft repulsive microgel suspensions,”
    Soft Matter, 15, 1038–1052 (2019). DOI link  arXiv
  13. Koch, J. A., D. Castaneda, R. H. Ewoldt, and D. Lange,
    “Vibration of fresh concrete understood through the paradigm of granular physics,”
    Cement and Concrete Research, 115, 31–42 (2019). DOI link

2018

  1. Martinetti, L., O. Carey-De La Torre, K. S. Schweizer, and R. H. Ewoldt,
    “Inferring the nonlinear mechanisms of a reversible network,”
    Macromolecules, 51 (21), 8772–8789 (2018). DOI link
  2. Chaudhary, G., D. S. Fudge, B. Macias-Rodriguez, and R. H. Ewoldt,
    “Concentration-independent mechanics and structure of hagfish slime,”
    Acta Biomaterialia, 79, 123–134 (2018). DOI link
    Recipient of the Acta Student Award for first-author Gaurav Chaudhary.
  3. Ning, X., X. Yu, H. Wang, R. Sun, R. E. Corman, H. Li, C. M. Lee, Y. Xue, A. Chempakasseril, Y. Yao, Z. Zhang, H. Luan, Z. Wang, W. Xia, X. Feng, R. H. Ewoldt, Y. Huang, Y. Zhang, and J. A. Rogers,
    “Mechanically active materials in three-dimensional mesostructures,”
    Science Advances, 4(9) (2018). DOI link
  4. Martinetti, L., J. M. Soulages, and R. H. Ewoldt,
    “Continuous relaxation spectra for constitutive models in medium-amplitude oscillatory shear,”
    Journal of Rheology, 62 (5), 1271–1298 (2018). DOI link
  5. Liu, H., A. Z. Nelson, Y. Ren, K. Yang, R. H. Ewoldt, and J. Moore,
    “Dynamic remodeling of covalent networks via ring-opening metathesis polymerization,”
    ACS Macro Letters, 7 (8), 933–937 (2018). DOI link
  6. Rauzan, B. M., A. Z. Nelson, R. H. Ewoldt, and R. G. Nuzzo,
    “Particle-free emulsions for 3D printing elastomers,”
    Advanced Functional Materials, 28(21), 1707032 (2018). DOI link
  7. Mohagheghian, E., J. Luo,  J. Chen, G. Chaudhary, J. Chen, J. Sun, R. H. Ewoldt, and N. Wang,
    “Quantifying compressive forces between living cell layers and within tissues using elastic round microgels,”
    Nature Communications, 9(1), 1878  (2018). DOI link
  8. Zhang, J., R. E. Corman, J. K. Schuh, R. H. Ewoldt, I. A. Shkrob, and L. Zhang,
    “Solution properties and practical limits of concentrated electrolytes for nonaqueous redox flow batteries,”
    The Journal of Physical Chemistry C, 122 (15), 8159–8172 (2018). DOI link
  9. Freund, J. B., J. Kim, and R. H. Ewoldt,
    “Field sensitivity of flow predictions to rheological parameters,”
    Journal of Non-Newtonian Fluid Mechanics, 257, 71-82 (2018). DOI link
  10. Adeniba, O. O., E. A. Corbin, R. H. Ewoldt, and R. Bashir,
    “Optomechanical microrheology of single adherent cancer cells,”
    APL Bioengineering, 2, 016108 (2018). DOI link
  11. Macias-Rodriguez, B. A., R. H. Ewoldt, and A. A. Marangoni,
    “Nonlinear viscoelasticity of fat crystal networks,”
    Rheologica Acta, 57(3), 251–266 (2018). DOI link
  12. Carey-De La Torre, O., and R. H. Ewoldt,
    “First-harmonic nonlinearities can predict unseen third-harmonics in medium-amplitude oscillatory shear (MAOS),”
    Korea-Australia Rheology Journal, 30(1), 1-10 (2018). DOI link  PDF PREPRINT
  13. Burgess, M., K. Hernandez-Burgos, J. K. Schuh, J. Davila, E. Montoto, R. H. Ewoldt, and J. Rodriguez-Lopez,
    “Modulation of the electrochemical Reactivity of solubilized redox active polymers via polyelectrolyte dynamics,”
    Journal of the American Chemical Society, 140 (6), 2093–2104 (2018). DOI link
  14. Nelson, A. Z., R. Bras, J. Liu, and R. H. Ewoldt,
    “Extending yield-stress fluid paradigms,”
    Journal of Rheology, 61(1), 357-369 (2018). DOI link
  15. Singh, P. K., J. M. Soulages, and R. H. Ewoldt,
    “Frequency-sweep medium-amplitude oscillatory shear (MAOS),”
    Journal of Rheology, 62(1), 277-293 (2018). DOI link

2017

  1. Nelson, A. Z., and R. H. Ewoldt,
    “Design of yield-stress fluids: A rheology-to-structure inverse problem,”
    Soft Matter, 13(41), 7578-7594 (2017). DOI link
  2. Shoaib, T., A. Carmichael, R. E. Corman, Y. Shen, H. Nguyen, R. H. Ewoldt, and R. M. Espinosa-Marzal,
    “Self-adaptive hydrogels to mineralization,”
    Soft Matter, 13(32), 5469-5480 (2017). DOI link
  3. Iyer, V., J. K. Schuh, E. Montoto-Blanco, V. P. Nemani, S. Qian, G. Nagarjuna, J. Rodriquez-Lopez, R. H. Ewoldt, and K. C. Smith,
    “Assessing the impact of electrolyte conductivity and viscosity on the reactor cost and pressure drop of redox-active polymer flow batteries,”
    Journal of Power Sources, 361, 334-344 (2017). DOI link
  4. Bharadwaj, N. A., K. S. Schweizer, and R. H. Ewoldt,
    “A strain stiffening theory for transient polymer networks under asymptotically-nonlinear oscillatory shear,”
    Journal of Rheology, 61(4), 643-665 (2017). DOI link
  5. Mahadik, B. P., N. A. Bharadwaj, R. H. Ewoldt, and B. A. C. Harley,
    “Niche cell density and hydrogel diffusivity influence feedback-mediated hematopoietic stem cell fate decisions,”
    Biomaterials, 125, 54–64 (2017). DOI link
  6. Ewoldt, R.H. and G. H. McKinley,
    “Mapping thixo-elasto-visco-plastic behavior,”
    Rheologica Acta, 56(3), 195-210 (2017). DOI link
  7. Lee, Y. H., J. K. Schuh, R. H. Ewoldt, and J. T. Allison,
    “Enhancing full-film lubrication performance via arbitrary surface texture design,”
    Journal of Mechanical Design, 139(5), 053401 (2017). DOI link
    2017 Journal of Mechanical Design Editors’ Choice Award – Honorable Mention 
  8. Blackwell, B. C., M. E. Deetjen, J. E. Gaudio, and R. H. Ewoldt,
    “Quantitative measures of yield-stress fluid drop impacts on coated surfaces,”
    Atomization and Sprays, 27(4), 337-343 (2017). DOI link
  9. Schuh, J. K., Y. H. Lee, J. K. Allison, and R. H. Ewoldt,
    “Design-driven modeling of surface-textured full-film lubricated sliding: validation and rationale of nonstandard thrust observations,”
    Tribology Letters, 65(2), 1-17 (2017). DOI link
  10. Bharadwaj, N. A., J. G. Kang, M. C. Hatzell, P. V. Braun, and R. H. Ewoldt,
    “Integration of colloids into a semi-flexible network of fibrin,”
    Soft Matter, 13(7), 1430-1443 (2017). DOI link

2016

  1. Blackwell, B. C., A. E. Nadhan, and R. H. Ewoldt,
    “Impacts of yield-stress fluid drops on permeable meshes,”
    Journal of Non-Newtonian Fluid Mechanics, 238, 107-114 (2016). DOI link
  2. Porter, M. E., R. H. Ewoldt, and J. H. Long,
    “Automatic control: The vertebral column of dogfish sharks behaves as a continuously variable transmission with smoothly shifting functions,”
    Journal of Experimental Biology, 219, 2908-2919 (2016). DOI link
  3. Abdeen, A. A., J. Lee, N. A. Bharadwaj, R. H. Ewoldt, and K. A. Kilian,
    “Temporal Modulation of Stem Cell Activity using Magnetoactive Hydrogels,”
    Advanced Healthcare Materials, (2016). DOI link
  4. Kumar, M. A., R. H. Ewoldt, and C. F. Zukoski,
    “Intrinsic Nonlinearities in the mechanics of hard sphere suspensions,”
    Soft Matter, 23, 035102 (2016). DOI link
  5. Jurado, L. A., H. Kim, A. Rossi, A. Arcifa, J. K. Schuh, N. D. Spencer, C. Leal, R. H. Ewoldt, and R. M. Espinosa-Marzal,
    “Effect of the environmental humidity on the bulk, interfacial and nanoconfined properties of an ionic liquid,”
    Physical Chemistry Chemical Physics, 18, 22719-22730 (2016). DOI link
  6. Ewoldt, R. H.,
    “Predictions for the northern coast of the shear rheology map: XXLAOS,”
    Journal of Fluid Mechanics, 798, 1-4 (2016). DOI link
  7. Schuh, J. K. and R. H. Ewoldt,
    “Asymmetric surface textures decrease friction with Newtonian fluids in full film lubricated sliding contact,”
    Tribology International, 97, 490-498 (2016). DOI Link
  8. Corman, R. E., L. Rao, N. A. Bharadwaj, J. T. Allison, and R. H. Ewoldt,
    “Setting material function design targets for linear viscoelastic materials and structures,”
    Journal of Mechanical Design, 138(5), 051402 (2016). DOI Link
  9. Corbin, E. A., O. O. Adeniba, R. H. Ewoldt, and R. Bashir,
    “Dynamic mechanical measurement of the viscoelasticity of single adherent cells,”
    Applied Physics Letters, 108, 093701 (2016). DOI link
  10. Blackwell, B. C. and R. H. Ewoldt,
    “Non-integer asymptotic scaling of a thixotropic-viscoelastic model in large-amplitude oscillatory shear,”
    Journal of Non-Newtonian Fluid Mechanics, 227, 80-89 (2016). DOI Link

2015

  1. Espinoza Santos, C. J., A. Nelson, E. Mendoza, R. H. Ewoldt, and W. M. Kriven,
    “Design and Fabrication of Ceramic Beads by the Vibration Method,”
    Journal of the European Ceramic Society, 35(13), 3587-3594 (2015). DOI link
  2. Freund, J. B. and R. H. Ewoldt,
    “Quantitative rheological model selection: good fits versus credible models using Bayesian inference,”
    Journal of Rheology, 59(3), 667-701 (2015). DOI link
  3. Blackwell, B. C., M. E. Deetjen, J. E. Gaudio, and R. H. Ewoldt,
    “Sticking and splashing in yield-stress fluid droplet impacts on coated surfaces,”
    Physics of Fluids, 27(4), 043101 (2015). DOI link
  4. Bharadwaj, N. A. and R. H. Ewoldt,
    “Single-point parallel disk correction for medium-amplitude oscillatory shear,”
    Rheologica Acta, 54(3), 223-233 (2015). DOI link
  5. Bharadwaj, N. A. and R. H. Ewoldt,
    “Constitutive model fingerprints in medium-amplitude oscillatory shear,”
    Journal of Rheology, 59(2), 557-592 (2015). DOI link
  6. Johnston, M. T., W. P. King, and R. H. Ewoldt,
    “Shear stress characteristics of microtextured surfaces in gap-controlled hydrodynamic lubrication,”
    Tribology International, 82, 123-132 (2015). DOI link

2014

  1. Bharadwaj, N. A. and R. H. Ewoldt,
    “The general low-frequency prediction for asymptotically-nonlinear material functions in oscillatory shear,”
    Journal of Rheology, 58(4), 891-910 (2014). DOI link
  2. Martinetti, L., A. M. Mannion, W. E. Voje, R. Xie, R. H. Ewoldt, L. D. Morgret, F. S. Bates, and C. W. Macosko,
    “A critical gel fluid with high extensibility: the rheology of chewing gum,”
    Journal of Rheology, 58(4), 821-838 (2014). DOI link
  3. Blackwell, B. C. and R. H. Ewoldt,
    “A simple thixotropic-viscoelastic constitutive model produces unique signatures in large-amplitude oscillatory shear (LAOS),”
    Journal of Non-Newtonian Fluid Mechanics, 208, 27-41 (2014). DOI link
  4. Roxworthy, B. J., M. T. Johnston, F. L. Montiel, R. H. Ewoldt, P. I. Imoukhuede, and K. C. Toussaint, Jr.,
    “Plasmonic optical trapping in biologically relevant media,”
    PLOS ONE, 9(4): e93929, (2014). DOI link
  5. Ewoldt, R. H.,
    “Extremely soft: Design with rheologically-complex fluids,”
    Soft Robotics, 1(1) 12-20 (2014). DOI link
    Invited review for inaugural issue

2013

  1. Johnston, M. T. and R. H. Ewoldt,
    “Precision rheometry: Surface tension effects on low-torque measurements in rotational rheometers,”
    Journal of Rheology, 57(6), 1515-1532 (2013). DOI link
  2. Song, J., R. H. Ewoldt, A. Baker, and C. W. Macosko,
    “Reactive coupling between immiscible polymer chains: Acceleration by compressive flow,”
    AIChE Journal, 59(9), 3391-3402 (2013). DOI link
  3. Ewoldt, R. H. and N. A. Bharadwaj,
    “Low-dimensional intrinsic material functions for nonlinear viscoelasticity,”
    Rheologica Acta, 52(3), 201-219 (2013). DOI link
  4. Ewoldt, R.H.,
    “Defining nonlinear rheological material functions for oscillatory shear,”
    Journal of Rheology, 57(1) 177–195 (2013). DOI link
  5. Dimitriou, C. J., R. H. Ewoldt, and G. H. McKinley,
    “Describing and prescribing the constitutive response of yield stress fluids using large amplitude oscillatory shear stress (LAOStress),”
    Journal of Rheology, 57(1) 27-70 (2013). DOI link

2012

  1. Felts, J., S. Somnath, R. H. Ewoldt, and W. P. King,
    “Nanometer-scale flow of molten polyethylene from a heated atomic force microscope tip,”
    Nanotechnology, 23(21) 215301, 2012. DOI link

2011

  1. Galindo-Rosales, F. J., F. J. Rubio-Hernandez, A. Sevilla, and R. H. Ewoldt,
    “How Dr. Malcom M. Cross May Have Tackled the Development of “An Apparent Viscosity Function for Shear Thickening Fluids,”
    Journal of Non-Newtonian Fluid Mechanics, 166(23-24), 1421-1424, 2011. DOI link
  2. Song, J., R. H. Ewoldt, W. Hu, C. Silvis, and C. W. Macosko,
    “Flow Accelerates Adhesion between Functional Polyethylene and Polyurethane,”
    AIChE Journal, 57(12), 3496-3506, 2011. DOI link
  3. Ewoldt, R. H., P. Tourkine, G. H. McKinley, and A. E. Hosoi,
    “Controllable Adhesion using Field-activated Fluids,”
    Physics of Fluids, 23, 073104, 2011. DOI link.
  4. Ewoldt, R. H., T. M. Winegard, and D. S. Fudge,
    “Non-linear Viscoelasticity of Hagfish Slime,”
    International Journal of Non-Linear Mechanics, 46(4), 627-636, 2011. DOI link
  5. Ng, T. S. K., G. H. McKinley, and R. H. Ewoldt,
    “Power Law Gels in Large Amplitude Oscillatory Shear Flow,”
    Journal of Rheology, 55(3), 627-654, 2011. DOI link
  6. Hyun, K., M. Wilhelm, C. O. Klein, K. S. Cho, J. G. Nam, K. H. Ahn, S. L. Lee, R. H. Ewoldt, and G. H. McKinley,
    “A Review of Nonlinear Oscillatory Shear Tests: Analysis and Application of Large Amplitude Oscillatory Shear (LAOS),”
    Progress in Polymer Science, 36(12), 1697-1753, 2011. DOI link

2010

  1. Epstein-Barash, H., G. Orbey, B. E. Polat, R. H. Ewoldt, J. Feshitan, R. Langer, M. A. Borden, and D. S. Kohane,
    “A Microcomposite Hydrogel for Repeated On-demand Ultrasound-triggered Drug Delivery,”
    Biomaterials, 31(19), 5208-5217, 2010. DOI link
  2. Ewoldt, R. H. and G.H. McKinley,
    “On Secondary Loops in LAOS via Self-intersection of Lissajous-Bowditch Curves,”
    Rheologica Acta, 49(2), 213-219, 2010. DOI link
  3. Ewoldt, R. H., P. Winter, J. Maxey, and G. H. McKinley,
    “Large Amplitude Oscillatory Shear of Pseudoplastic and Elastoviscoplastic Materials,”
    Rheologica Acta, 49(2), 191-212, 2010. DOI link

2009

  1. Celli, J. P., B. S. Turner, N. H. Afdahl, S. Keates, I. Ghiran, C. Kelly, R. H. Ewoldt, G. H. McKinley, P. So, S. Erramilli, and R. Bansil,
    “Helicobacter Pylori Moves Through Mucus by Reducing Mucin Viscoelasticity,”
    Proceedings of the National Academy of Sciences, 106 (34), 14321-14326, 2009. DOI link
  2. Ewoldt, R. H., A. E. Hosoi, and G.H. McKinley,
    “Nonlinear Viscoelastic Biomaterials: Meaningful Characterization and Engineering Inspiration,”
    Integrative and Comparative Biology, 49 (1), 40-50, 2009. DOI link
  3. Fudge, D. S., T. Winegard, R. H. Ewoldt, D. Beriault, L. Szewciw, and G. H. McKinley,
    “From Ultra-soft Slime to Hard Alpha-keratins: The Many Lives of Intermediate Filaments,”
    Integrative and Comparative Biology, 49 (1), 32-39, 2009. DOI link

2008

  1. Ewoldt, R. H., A. E. Hosoi, and G.H. McKinley,
    “New Measures for Characterizing Nonlinear Viscoelasticity in Large Amplitude Oscillatory Shear,”
    Journal of Rheology 52(6), 1427-1458, 2008. DOI link
    Highest number of citations among all articles published in Journal of Rheology 1999-present (Web of Science)

2007

  1. Ewoldt, R. H., C. Clasen, A. E. Hosoi, and G. H. McKinley,
    “Rheological Fingerprinting of Gastropod Pedal Mucus and Synthetic Complex Fluids for Biomimicking Adhesive Locomotion,”
    Soft Matter 3(5), 634-643, 2007. DOI link
  2. Celli, J. P., B. S. Turner, N. H. Afdhal, R. H. Ewoldt, G. H. McKinley, R. Bansil, and S. Erramilli,
    “Rheology of Gastric Mucin Exhibits a pH-dependent Sol-gel Transition,”
    Biomacromolecules 8(5), 1580-1586, 2007. DOI link

2005

  1. Li, H., R. H. Ewoldt, and M. G. Olsen,
    “Turbulent and Transitional Velocity Measurements in a Rectangular Microchannel using Microscopic Particle Image Velocimetry,”
    Experimental Thermal and Fluid Science, 29: 435-446, 2005. DOI link

Technical Periodicals

  1. Ewoldt R.H., A.K. Gurnon, C. López-Barrón, G.H. McKinley, J. Swan, N.J. Wagner,
    “LAOS rheology day, Friday the 13th, Colburn Laboratory, University of Delaware,”
    Rheology Bulletin 81(2), (2012)
    Full Text PDF
  2. Ewoldt, R. H., and G.H. McKinley,
    “Creep ringing in rheometry or How to deal with oft-discarded data in step stress tests,”
    Rheology Bulletin, 76(1) (2007)
    Full Text PDF

Articles in Conference Proceedings

  1. Pei, Y., R. H. Ewoldt, C. M. Zallek, and E. T. Hsiao-Wecksler, “Revised Design of a Passive Hydraulic Training Simulator of Biceps Spasticity,” In 2018 Design of Medical Devices Conference, Minneapolis, MN, April 9-12, 2018. [EXTENDED PROCEEDING PAPER]
  2. Nelson, A. Z., and R. H. Ewoldt, “Rheological design of yield-stress fluids,” In WCARP 6th World Congress on Adhesion and Related Phenomena in conjunction with the 41st Annual Meeting of The Adhesion Society, San Diego, CA, Feb 25 – Mar 1 2018 [EXTENDED PROCEEDING PAPER]
  3. Lin, C., ​D. Herber, Vedant, ​Y. H. ​Lee, A.​ ​Ghosh, R. H. Ewoldt, and J. T. Allison, “Attitude Control System Complexity Reduction via ​Tailored Viscoelastic Damping Co-Design,” In AIAA SciTech Forum 2018, Guidance, Navigation, and Control Conference, DE-04, Kissimmee, Florida, Jan 2018. [EXTENDED PROCEEDING PAPER]
  4. Lee, Y. H., R. E. Corman, R. H. Ewoldt, and J. T. Allison. “A multiobjective adaptive surrogate modeling-based optimization (MO-ASMO) framework using efficient sampling strategies.” In ASME 2017 International Design Engineering Technical Conferences, No. DETC2017-67541, Cleveland, OH, USA, Aug 2017. [EXTENDED PROCEEDING PAPER] (12 pages) DOI link
  5. Lin, C., Y. H. Lee, J. K. Schuh, R. H. Ewoldt, and J. T. Allison, “Efficient optimal surface texture design using linearization,” presented at The 12th World Congress on Structural and Multidisciplinary Optimization, Braunschweig, Germany, June 5-9, In: Advances in Structural and Multidisciplinary Optimization. WCSMO 2017. Springer, pp 632-647, 2017. [EXTENDED PROCEEDING PAPER] DOI link
  6. Lee, Y. H., J. K. Schuh, R. H. Ewoldt, and J. T. Allison, “Shape parameterization comparison for full-film lubrication texture design,” In ASME 2016 International Design Engineering Technical Conferences,  No. IDETC 2016-60168, Charlotte, NC, USA, August 2016. [EXTENDED PROCEEDING PAPER] (11 pages) DOI link
  7. Lange, D. A., D. I. Castaneda, J. A. Koch, R. H. Ewoldt, and K. A. Riding, “Stability and Retention of Entrained Air in Conventional and Self-Consolidating Concrete,” The 8th International RILEM Symposium on Self-Compacting Concrete – SCC 2016, Washington, D. C., May 2016 [EXTENDED PROCEEDING PAPER]
  8. Liang, J., R. H. Ewoldt, S. R. Tippett, and E. T. Hsiao-Wecksler, “Design and Modelling of a Passive Hydraulic Device for Muscle Spasticity Simulation,” ASME J. Med. Devices 10(2), pp. 2016020954-020954-2 [EXTENDED PROCEEDING PAPER] (2 pages) DOI link
  9. Rao, L. G., J. K. Schuh, R. H. Ewoldt, and J. T. Allison, “On Using Adaptive Surrogate Modeling in Design for Efficient Fluid Power,” ASME 2015 International Design Engineering Technical Conferences, No. DETC2015-46832, pp. V02BT03A024-V02BT03A024, Boston, MA, USA, August 2015. [EXTENDED PROCEEDING PAPER] (11 pages) DOI link
  10. Lange, D. A., D. I. Castaneda, J. A. Koch, R. H. Ewoldt, and K. A. Riding, “Stability of Entrained Air in Self-Consolidating Concrete under Vibration,” In XXII Nordic Concrete Research Symposia (pp 387-90), Reykjavik, Iceland: Norsk Betongforening, July 2014. [EXTENDED PROCEEDING PAPER]
  11. Bharadwaj, N. A., J. T. Allison, and R. H. Ewoldt, “Early-stage design of rheologically complex materials via material function design targets,” Proceedings of ASME 2013 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, August 4-7, 2013, Portland, OR, USA, paper DETC2013-13462. [EXTENDED PROCEEDING PAPER] (10 pages)
  12. Ewoldt, R. H., A. E. Hosoi, and G. H. McKinley, “An Ontology for Large Amplitude Oscillatory Shear Flow,” The XV International Congress on Rheology: The Society of Rheology 80th Annual Meeting, Monterey (California), AIP Conf. Proc., 1027, 1135-1137, 2008. [EXTENDED PROCEEDING PAPER]
  13. Zhou, L., R. H. Ewoldt, L. P. Cook, and G. H. McKinley, “Probing Shear-banding Transitions of Entangled Liquids using Large Amplitude Oscillatory Shearing (LAOS) Deformations,” The XV International Congress on Rheology: The Society of Rheology 80th Annual Meeting, Monterey (California), AIP Conf. Proc., 1027, 189-191, 2008. [EXTENDED PROCEEDING PAPER]
  14. Maxey, J., R. H. Ewoldt, P. Winter, and G. H. McKinley, “Yield Stress: What is the “True” Value?,” AADE Fluids Conference and Exhibition, Houston (Texas), AADE-08-DF-HO-27, 10 pp., 2008. [EXTENDED PROCEEDING PAPER]
  15. Ewoldt, R. H., A. E. Hosoi, and G. H. McKinley, “Rheological Fingerprinting of Complex Fluids using Large Amplitude Oscillatory Shear (LAOS) Flows,” Nordic Rheology Conference, Stavanger, Norway, Annual Transactions of the Nordic Society of Rheology, 3-8, 2007. [EXTENDED PROCEEDING PAPER]
  16. Ewoldt, R. H., A. E. Hosoi, and G. H. McKinley, “Rheology of Mucin Films for Molluscan Adhesive Locomotion,” Abstracts of Papers of the American Chemical Society, 231(387-PMSE), 2 pp., 2006. [EXTENDED ABSTRACT]

Patent

Martinetti, L., C.W. Macosko, R.H. Ewoldt, L.D. Morgret, “Nonlinear rheology of chewing gum and gum base,” WIPO Patent Application WO/2012/019140 (2012)

Software

Ewoldt, R. H., P.B. Winter, and G. H. McKinley,
“MITlaos,” v2.1 Beta – MATLAB-based data analysis software for characterizing nonlinear viscoelastic responses to oscillatory shear strain
To request “MITlaos” (free), please contact MITlaos[at]mit[dot]edu