Deformation Analysis of 3D Braided Structural Composites

摘要

A nonlinear finite element technique is used to simulate and analyze the deformation behavior of 3D braided composites. The finite element displacement formula is derived from the geometric nonlinear behavior of braided composites. The integral relevant to the element stiffness matrix is simplified by selecting a 20-node hexahedral solid element. The Gauss-Legendre quadrature is used to compute the element matrix. A program referred to as SNLFEDA (Simulation of Nonlinear Finite Element Deformation Analysis) is developed. Tension, compression, and bending of 3D braided composites is simulated, and the results of these simulations are supported by the experimental data and the values predicted by previously published elastic modulus models.