Table 1 Impact properties of the epoxy resin, Bm- and Ap-SFRPs with different volume fraction. σ i : impact strength (kJ m−2), σ i /ρ: specific impact strength (J m−2/kg m−3).

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

Sample

Impact strength σ i kJ m−2

Specific Impact Strength σ i /ρ J m−2/kg m−3

Unreinforced Resin

12.8 ± 0.2

10.7 ± 0.1

30 vol.% Bm-SFRP

18.5 ± 1.4

15.0 ± 1.2

60 vol.% Bm-SFRP

70.7 ± 1.7

56.1 ± 1.4

30 vol.% Ap-SFRP

52.5 ± 3.1

42.7 ± 2.5

60 vol.% Ap-SFRP

>100

>79.4