Bending properties of 3D I-shaped woven composites

Abstract

This paper dealt with the bending properties of 3D (three-dimensional) I-shaped woven composites with basalt fiber filaments tows and epoxy vinyl resin. The 3D I-shaped woven fabrics with three different heights were woven on ordinary loom by reasonable design with low cost. The 3D I-shaped woven composites were fabricated by VARTM(vacuum assisted resin transfer molding) process. The bending tests were conducted on a microcomputer control universal testing machine (TH-8102S). The load-displacement and energy-displacement scatter plots were obtained from experimental tests. The results showed that the polynomial fitting formula were obtained by the calculation of least square method in the software of origin 8.0. Through the analysis of the mathematical equation and correlation coefficient of load-displacement and energy-displacement relationship.it was seen that the fitting effect of the curve was very good. The mathematical equation of this method can be used to simplify the calculation of load, energy from displacement.