Experiments and progressive damage analyses of three-dimensional five-directional braided composite joints for propeller

摘要

In this article, experiments and numerical simulation on the tensile loading properties of three-dimensional five-directional braided composites are studied. Herein, axial tensile loading tests were performed on braided composite and aluminum joints for propeller. A repeated unit cells model was established to analyze the micromechanical properties of the braided joint, a progressive damage model was established to evaluate the damage in the joint. In contrast to aluminum joint, which exhibited a tensile failure mode in only one direction, the braided joint exhibited both longitudinal and transverse damage failure modes, of which the transverse damage was the primary failure mode. The load-displacement curves and damage morphology of the numerical simulation were in a good agreement with the experimental results.