Flexural Fracture and Mechanical Properties of Nonsymmetrical Sandwich Construction

抄録

Sandwich construction is composed of hard polyurethane foam(PUF) as core and glass-mat FRP(GRP) and aluminium(Al) as facing. The flexural fracture and mechanical properties of this nonsymmetrical sandwich construction are examined. The behaviors of flexural fracture of GRP/PUF/Al sandwich construction, which is loaded with GRP on tension side, are examined for flexural stress, strain etc. to consider the elasto-plastic deformation of GRP, and are numerically analyzed using a flexural load-deflection diagram of this sandwich construction. The flexural experiment has been made for comparing with the results of theoretical analysis on the mechanical properties of this sandwich construction. And this analytical method applied to the process of flexural fracture can be practical enough for the estimation of flexural strength and theoretical flexural load-deflection diagram.