在使用不同渐进式损伤技术的脆性和柔性粘合剂的复合单关节中,故障负载预测的影响
Yung-Cheng Chuang1, Cong-Sheng Su1, Yu-Jui Liang1
1Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan.
Polymers
|April 13, 2024
概括
航空航天复合材料中的粘合剂粘合正在推进. 这项研究比较了凝聚区模型 (CZM) 和虚拟裂关闭技术 (VCCT) 来预测关节强度,发现VCCT对脆性粘合剂准确,而CZM适用于柔性粘合剂.
科学领域:
- * 材料科学与工程 * 材料科学与工程
- * 机械工程 机械工程
- * 航空航天工程 航空航天工程
背景情况:
- * 粘合剂越来越多地用于航空航天复合材料,比传统的固定方法具有优势.
- * 传统的接合可以导致应力度和损伤,而粘合式接合则提供更平稳的应力分布.
- * 准确预测关节强度和故障对于结构完整性至关重要.
研究的目的:
- * 评估Abaqus中不同渐进性损伤建模技术对复合单关节的有效性.
- * 为了比较凝聚区模型 (CZM) 和虚拟裂关闭技术 (VCCT) 的预测准确度,用于脆性和柔性粘合剂.
- *研究粘合层的各种建模方法,包括凝聚元素和凝聚表面.
主要方法:
- * 在Abaqus中开发2D有限元素模型,并采用渐进式损伤建模.
- * 实施凝聚区模型 (CZM),使用零/非零厚度的凝聚元素和凝聚面.
- * 虚拟裂关闭技术 (VCCT) 的应用用于故障预测.
- * 将模拟结果与现有文献中的实验数据进行比较.
主要成果:
- *对于柔性粘合剂,凝聚性元素和凝聚性表面,准确预测了故障负载,与实验结果保持一致.
- * 与实验数据相比,VCCT方法预测了柔性粘合剂的更高的故障负载.
- *对于易碎的粘合剂,凝聚性元素和凝聚性表面显示出与实验结果的显著偏差.
- * VCCT技术在预测脆性粘合剂的故障负载方面表现出高准确性.
结论:
- *损伤建模技术的选择显著影响复合关节强度的预测准确性.
- *VCCT是一种可靠的方法,用于预测复合材料接头中的脆性粘合剂的故障.
- * CZM方法 (凝聚性元素,凝聚性表面) 适用于航空航天应用中的柔性粘合剂的建模.
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