Study of the mechanical behaviour of a short-fiber reinforced materials under buckling load

Various easy to use flexure testing apparatus can be used to determine the characteristics and the qualification of composite materials. Nevertheless some problems may arise due to localized stress concentration as a result of the applied load. This leads to early rupture in the neighbourhood of applied load. This is particularly severe in materials with a high degree of anisotropy which are very sensitive to contact stresses: thermoplastic matrix, modified epoxy matrix (ductile). The goal of our study is to propose the deflection test per buckling. A specific testing ground of instrumented buckling was developed.