The dependency of compressive response of epoxy syntactic foam on the strain rate and temperature under rigid confinement

Syntactic foam is being increasingly conceived for aero engine applications to enhance overall structural reliability under impact loading . Systematic compressive tests without and with lateral confinement are carried out investigate the deformation failure of an epoxy syntactic (ESF) at quasi-static 0.01/s, medium rate 10–100/s high strain rates 500–1100/s gradually increasing temperatures from room temperature 25 °C 150 °C. The stress–strain response corresponding process , complemented by Digital Image Correlation (DIC) technique, were monitored reveal dynamic localization foam. elastic-brittle behavior can be suppressed elevated above 100 slightly increases yield stress significantly improves energy absorption ESF. Both confined evolve nonlinearly temperature. hardening in elastic–plastic ESF independent, compared its modest dependency A nonlinear phenomenological model found able describe unconfined responses temperature-strain equivalence, competition between softening which influenced