A more explosion-resistant bamboo fiber reinforced composite structure through balancing bamboo anisotropy

Abstract

Explosion-resistance of two kinds of bamboo composite plates with different laminated structures was investigated by in-field explosion experiments. It is revealed that both unidirectional parallel bamboo strand lumber (PBSL) plates and cross-laminated bamboo (CLB) plates can resist large dynamic elastic deformation and have good anti-explosion ability. Through balancing PBSLs’ anisotropy by cross-laminated structure, the CLB plate is far superior to the PBSL in explosion resistance. In this research, the critical scaled distance is between 1.293 m/kg1/3 and 1.086 m/kg1/3 for the PBSL, while it is significantly reduced and between 0.543 m/kg1/3 and 0.407 m/kg1/3 for the CLB. Matrix cracking penetrates the full thickness of the PBSL plate and attenuates its explosion resistance, while this shortcoming is overcome by the CLB whose main damage modes are fiber fracture and spalling. The CLB is a more explosion-resistance bamboo structure.