分别对编织角度为30和45度的三维四向碳环氧编织复合材料进行了不同厚度试件的弯曲实验,验证了材料的破坏模式、本构关系与试件几何尺寸的相关性.研究表明:弯曲破坏无明显的破坏裂纹,当载荷增加到了极限载荷,载荷不再增加而位移依然逐渐变大.当进行卸载时,大部分的弹性变形都可以得到恢复,仅剩余很小的塑性变形.另外改变试件的厚度对材料的载荷位移关系没有影响.
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