Finite element simulation of biaxial warp knitted flexible composite under biaxial loads

To better understand the tensile and crack tearing properties of biaxial warp knitted flexible composite under biaxial loads and provide theoretical reference for evaluation and prediction of the properties of composite materials,this paper used finite element analysis to simulate the stress-strain curves for tensile and crack tearing tests of biaxial warp knitted fabrics flexible composite under biaxial loads,in particular,the simulation of the stress-strain curves for tensile and crack tearing tests under three different loading ratios.The results show that the simulated stress-strain curves based on finite element are fitted very well to the experimental values at the elastic phase,but fitting deviation is too large after yield point of the material.Theoretical results show that not only the stress-strain curve for tensile and crack tearing of biaxial warp knitted flexible composite under 1:1 load ratios can be simulated but also that under other arbitrary load ratios which can not be tested now can be simulated.