Repeated Tensile Loading of Thin-ply Pseudo-ductile Laminates

Abstract

The loading-unloading-reloading response of thin-ply hybrid and angle-ply laminates is presented. Fibre fragmentation in 0Ëš plies leads to a loss of modulus. Considerable non-linearity arises in the angle plies, with some permanent deformation. However there is little loss of initial modulus on reloading. Experimental results are presented for different configurations, and the results compared to illustrate the mechanisms controlling the cyclic behaviour and changes in modulus.