https://www.nist.gov/publications/strain-rate-dependence-fracture-rubber-toughened-epoxy-system
The toughening mechanisms in rubber-modified epoxies appear to be viscoelastic in nature since the fracture behavior is dependent on loading rate.
strain ratedependencefracturerubberepoxy
https://thevamaran.engr.wisc.edu/publications/rate-sensitive-strain-localization-and-impact-response-of-carbon-nanotube-foams-with-microscale-heterogeneous-bands/
Thevamaran, R., J. R. Raney, and C. Daraio. Rate-Sensitive Strain Localization and Impact Response of Carbon Nanotube Foams With Microscale Heterogeneous...
carbon nanotuberatesensitivestrainlocalization