Abstract:In this paper, the nonlinear response of indenter-foam dampers is characterized. Those dampers consist of indenters pressed on open-cell foams swollen with wetting liquids. Recently, the authors identified the dominant mechanism of damping in those dampers as poro-viscoelastic (PVE) relaxations as in articular cartilage, one of nature's best solutions to vibration attenuation. Those previous works by the authors included dynamic mechanical analyses of the indenter-foam dampers under small vibrations, i.e., lin… Show more
“…Our group also observed high adhesion when testing oil-imbibed open cell foams with indentation-based DMA. 23 One needs to suppress adhesion via surface treatment and/or lubrication in those techniques to re-use the samples. However, that would also trigger nonlinear interfacial mechanics such as slip and make the identification harder.…”
Section: Introductionmentioning
confidence: 99%
“…Vibration and wave-based characterization offers a viable alternative for soft materials. [20][21][22][23][24][25][26] For instance, laser vibrometry 21 is shown to characterize dynamic and viscoelastic properties of multiphasic biological tissues such as cartilage considerably faster than conventional techniques. 21 Studies utilized vibration techniques to understand parametric resonances in soft materials and water droplets; 27 develop variable stiffness artificial muscles for vibration absorption; 28 and achieve broadband vibration attenuation using soft materials.…”
Hydrogels, water-saturated polymer networks find widespread use in soft robotics, biomedical, pharmaceutical and food industries. Both solid and water constituents of hydrogels are sensitive to external stimuli such as temperature,...
“…Our group also observed high adhesion when testing oil-imbibed open cell foams with indentation-based DMA. 23 One needs to suppress adhesion via surface treatment and/or lubrication in those techniques to re-use the samples. However, that would also trigger nonlinear interfacial mechanics such as slip and make the identification harder.…”
Section: Introductionmentioning
confidence: 99%
“…Vibration and wave-based characterization offers a viable alternative for soft materials. [20][21][22][23][24][25][26] For instance, laser vibrometry 21 is shown to characterize dynamic and viscoelastic properties of multiphasic biological tissues such as cartilage considerably faster than conventional techniques. 21 Studies utilized vibration techniques to understand parametric resonances in soft materials and water droplets; 27 develop variable stiffness artificial muscles for vibration absorption; 28 and achieve broadband vibration attenuation using soft materials.…”
Hydrogels, water-saturated polymer networks find widespread use in soft robotics, biomedical, pharmaceutical and food industries. Both solid and water constituents of hydrogels are sensitive to external stimuli such as temperature,...
“…A similar adhesion mechanism was proposed by Lai et al 16 where the amount of polymer chains adhering to the counter surface and thus pull-off forces increase with contact time. Moreover, adhesion measured on PVE materials depends on unloading rates as observed in cartilage, 15 insect feet, 17 oil-swollen foams, 18 and epithelial cells. 19 For explaining the rate-dependence, fracture and adhesion mechanics of viscoelastic solids has been promising.…”
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