Tensile Mechanical Properties of Nanowoven Composites Based on Homogenization Theory

Abstract

The nanocomposite is a multiphase material composed of two or more component materials with different properties and different forms through composite means. New material properties. The stress distribution of nano-braided composites in bending is much more complicated than in tension. Like the tensile condition, the braid angle is still the main factor affecting the bending failure mode. In order to study the tensile strength of nano-braided composites from a microscopic perspective, the nonlinear damage analysis under multiple tensile load steps is carried out in this paper. The damage analysis results show that the microscopic damage modes of different braided angle composites differ. Based on this, this paper determines the transformation of the failure mechanism to characterize the braided composites. An important parameter—critical braiding angle, established different tensile strength failure criteria for small braided angle composites and large braided angle composites and numerically predicted the tensile strength of nano braided composites based on these criteria. The value of each stress component increases with the increase of the braiding angle, and the ratio is about 1:1.25. The strength prediction results are in good agreement with the experimental results.