Here we initiate a study of fatigue fracture of hydrogels. We choose polyacrylamide hydrogel as a model material. To place fatigue fracture in context, we apply monotonic, static, and cyclic load, and observe three types of fracture behavior: fast fracture, delayed fracture, and fatigue fracture...
j Comparison of the fatigue threshold (Γ0) and fracture energy (Γ) of hybrid ionic skin with previously reported anti-fatigue hydrogels and elastomers. k POM images of a notched hybrid ionic skin as gradually stretched to 400% strain. All the images were taken in the presence of 530 ...
The resulting hydrogels show high mechanical strength (289-396 KPa of fracture stress, 433-864 % of fracture stress) and have great fatigue resistance. The hydrogel with a 1 : 1 molar ratio of SBMA:DAC possesses the best self-healing properties (self-healing efficiency up to 96.5 % at ...
The dense, high- crystallinity ANFs/PVA polymer network further enhances the com- prehensive mechanical properties of SA0.5 gel (Supplementary Figs. S6, S7). The SA0.5 gel exhibited a fracture energy of 146 kJ m−2 (Supple- mentary Equation (1)) and stress of 5.7 MPa, significantly ...
The present disclosure relates to triblock and pentablock copolymers and methods of making thereof. Aspects of the disclosure further relate to block copolymer hydrogels that exhibit both fatigue resistance and fracture resistance with superior rates of recovery. 机译:本公开涉及三嵌段和五嵌段和五嵌段...
26 However, engineering bouligand structure in soft hydrogels has been challenging. A recent study reports that the soft membrane in the lobster underbelly is also composed of the bouligand multi-layered structure, which imparts the natural hydrogel with an extremely high fracture toughness (i.e.,...
11 Evidence has accumulated recently that synthetic hydrogels, unlike biological tissues, are susceptible to fatigue fracture.3 It is likely that biological tissues achieve fatigue resistance through heterogeneous structures with strong adhesion between materials.12 Transformative advances have been made ...
Fatigue crack growth analysis of hydrogel by using peridynamicsHYDROGELSFRACTURE mechanicsFATIGUE lifeFATIGUE crack growthFATIGUE cracksThis study presents an application of bond-associated non-ordinary state-based peridynamics (PD) and the corresponding fatigue theory to predict fatigu...
By crosslinking these fibres, the resulting hydrogels showed an unusual combination of high mechanical strength (fracture stress ~4.1 MPa), ultrahigh toughness (fracture energy ~25.3 kJ m−2), excellent fatigue resistance (fatigue threshold ~424 J m−2) and almost 100% mechanical...
Mesoscale bicontinuous networks in self-healing hydrogels delay fatigue fracture. Proc. Natl Acad. Sci. USA 117, 7606–7612 (2020). Article ADS CAS PubMed PubMed Central Google Scholar Patrick, J. F., Robb, M. J., Sottos, N. R., Moore, J. S. & White, S. R. Polymers with ...