对于承受压缩负荷的复合钢丝管的多尺度渐进式故障分析
Jian Shi1, Jianjiang Zeng2, Jie Zheng3
1College of Aviation Engineering, Civil Aviation Flight University of China, Guanghan 618307, China.
本研究使用多尺度模型量化预测复合飞机结构中的矩阵损伤. 该方法准确模拟故障模式和负载,有助于设计更有弹性复合材料.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 航空航天工程 航空航天工程
背景情况:
- 纤维增强复合纤维在飞机机翼中至关重要.
- 矩阵裂纹是压缩下常见的故障模式.
- 对矩阵失效的定量分析具有挑战性.
研究的目的:
- 开发和验证一种多尺度的方法,用于预测复合纤维的矩阵损伤.
- 通过使用一种新的损害指标,量化评估矩阵故障程度.
- 将模拟结果与实验数据进行比较.
主要方法:
- 一种结合通用细胞方法 (GMC) 和有限元素方法 (FEM) 的多尺度方法.
- 适用于矩阵子细胞的3D Tsai-Hill标准和纤维子细胞的最大应力标准.
- 模拟失败子细胞的刚性降低,以表示损伤进展.
主要成果:
- 多尺度模型准确地预测了最终负载,故障模式和负载位移曲线.
- 实验和模拟结果显示了良好的一致性.
- 失败的矩阵子细胞的数量有效量化了2x2GMC模型中的损伤程度.
结论:
- 拟议的多尺度分析方法成功地预测了复合纤维的矩阵损伤.
- 主要在45°和-45°层中观察到矩阵亚细胞故障.
- 这种方法为分析压力负荷下的复合材料结构完整性提供了可靠的工具.
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