在插入干扰合适螺栓时,对CFRP混合粘合螺栓关节的损伤分析
Long Yan1, Ruisong Jiang2, Yangjie Zuo3
1School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Materials (Basel, Switzerland)
|May 27, 2023
概括
在碳纤维增强聚合物 (CFRP) 混合粘合螺栓 (HBB) 接头中,更大的干扰适应尺寸会在螺栓插入时增加损坏,主要导致矩阵压缩故障. 粘合剂层表现出弹性,在测试的大小中没有完全失败.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 混合粘合螺栓 (HBB) 接头在航空航天和汽车应用中至关重要.
- 在组装过程中了解CFRP HBB接头的损坏机制对于结构完整性至关重要.
- 干扰拟合组件是一种常见的技术,可以诱导显著的压力.
研究的目的:
- 为了研究不同干扰尺寸对CFRP HBB接头在螺栓插入过程中损伤的启动和传播的影响.
- 将实验结果与有限元素分析 (FEA) 预测进行比较.
- 为了确定复合板材和粘合层中占主导地位的故障模式.
主要方法:
- 在CFRP HBB接头上的试验性螺栓插入试验,干扰适合尺寸为0.4%,0.6%,0.8%和1%.
- 使用Shokrieh-Hashin标准和Tan的降解规则进行有限元分析 (FEA).
- 凝聚区模型 (CZM) 用于模拟粘合层损伤.
- 该标本的设计符合ASTM D5961标准.
主要成果:
- 确定了矩阵压缩故障是复合板材中的主要故障模式.
- 干扰适合尺寸的增加导致了额外的故障模式的出现,并扩大了故障区域.
- 粘合层在任何测试的干扰适合尺寸中都没有完全失效.
- 插入力通常随着更大的干扰适应尺寸而增加.
结论:
- 干扰适合尺寸显著影响了CFRP HBB接头的损坏行为和故障机制.
- FEA有效地预测了层层损伤,与实验观察结果相对应.
- 该研究为优化CFRP HBB接头的设计提供了宝贵的见解,以减轻组装引起的损坏.
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