Figure 3
From: Enhancing the Mechanical Toughness of Epoxy-Resin Composites Using Natural Silk Reinforcements

Repeated stress-strain curves of pure epoxy resin and SFRPs from Bm and Ap silk reinforcements (at quasi-static strain rate under flexural deformation) at temperatures: (a) 20 °C; (b) −50 °C; (c) −100 °C and (d) −150 °C. Comparisons of flexural mechanical properties including specific flexural modulus (e), specific flexural strength (f) and breaking energy (g) of pure epoxy resin and SFRPs at the four temperatures.