Effect of braiding angle on dynamic mechanical properties of 3-D braided rectangular composites under multiple impact compressions

Abstract

This paper reports dynamic mechanical behaviors of 3-D rectangular braided composite with different braiding angles under multi-pulse impact load. The composite materials were prepared with braided preforms which have braiding angles of 15 °, 26° and 37 °, respectively. Impact compression tests were conducted in split Hopkinson pressure bar. High-speed camera system was used to capture damage growth process and a meso-scale finite element model was established to investigate failure mechanisms. We found that the braiding angle has significant effects on damage development, failure mechanisms and ultimate damage morphogenesis. The braided composite with 15° braiding angle shows a linear elastic response at the initial stage of stress–strain curves until the peak load. After the peak load, the composite has brittle failure behaviors, while the composites with 26° and 37° braiding angles exhibit non-linear elastic response at the beginning stage of stress–strain curves and ductile failure mode after yielding points. The composites with different braiding angles demonstrated both distinguished damage development and final fracture morphology. In addition, load-bearing ratio of yarns in composite was also affected by braiding angles.

Mode I Fatigue of Fibre Reinforced Polymeric Composites: A Review

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Flexural performance of three-dimensional braided open-hole composite with different hole diameter and preform size

“…Textile structures significantly influence the mechanical behavior of fiber reinforced composites. 30,31 Braided composite exhibits particular damage evolution mechanism under flexural load due to its excellent structural integrity. 32 Liu et al 33 studied the failure mechanism of 3D braided composite under flexural loading.…”

Mechanical response and failure mechanism of three-dimensional braided composites under various strain-rate loadings by experimental and simulation research: a review

“…To make 3D braided composites better used in various complex working conditions, many experimental studies have been made of the mechanical response and failure mechanisms of 3D braided composites under various strain-rate loadings, namely quasi-static (≤10 −2 /s), 17 low velocity (10 −2 /s–10 2 /s) 18,19 and high-speed loading (10 2 /s–10 4 /s). 20–22 Results showed that properties of 3D composites were influenced by braided structures, 23,24 and their mechanical responses varied from the strain rates. In addition, many theoretical and structural models were developed to investigate failure mechanisms and predict mechanical properties, such as nonlinear response, damage evolution and effective elastic constants.…”