Through-thickness Tension And Interlaminar Shear Damage Behavior Of Three Dimension Woven Composites

In this paper,the through-thickness direction tensile test and the inter-laminar shear test of three-dimensional woven composites were carried out.The threedimensional structure and damage evolution of three-dimensional woven composites were observed by Micro-CT and DIC technology.The yarn shape and yarn path were obtained by 3D reconstruction based on X-ray micro-computed tomography.The parametric mesoscopic model was established,the numerical simulation results are compared with the experimental results.In chapter 2,three-dimensional reconstruction technology of 3D woven composites is established by using Micro-CT scanning images.The yarn structure,shape,path of the reconstructed three-dimensional model are analyzed by procrustes analysis method.A representative volume element(RVE)model was established.In chapter 3,the three-dimensional woven composite V-notch shear test fixture and through-thickness direction tensile test fixture were designed according to the test requirements.The V-Notch inter-laminar shear test and the through thickness direction tensile test of the three-dimensional woven composites were carried out.The three-dimensional Digital Image Correlation(DIC)technique was used to obtain the whole strain of the specimen.The properties and damage evolution of threedimensional woven composites in the through-thickness direction is obtained.In chapter 4,based on the representative volume element(RVE)model of threedimensional woven composite established in Chapter 2,the numerical simulation of the through-thickness tensile and the inter-laminar shear of the three-dimensional woven composites is carried out,the result was compared with the experimental results.