在压缩负荷下对复合皮肤-强壮结构的故障行为和力传递的研究
Guoyang Zhao1, Jian Shi2, Wei Xu1
1School of Aviation Maintenance Engineering, Chengdu Aeronautic Polytechnic, Chengdu 610100, China.
Materials (Basel, Switzerland)
|March 27, 2025
概括
一个新的模型准确地预测了碳纤维复合材料飞机结构的故障. 这项研究提高了对皮肤紧固件组件承载能力和故障机制的理解.
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:
- 碳纤维增强复合材料对于飞机结构至关重要,提高了性能和安全性.
- 了解复合材料皮肤链结构的承载能力和故障机制对于结构完整性至关重要.
研究的目的:
- 开发和验证一种新的计算模型,用于分析在压力负载下T800/3900S-2B纤维增强复合材料皮肤链结构的复杂故障和负载传输行为.
主要方法:
- 实验性压缩强度测试是在一个复合串/皮肤结构上进行的.
- 一个三维的有限元素方法 (FEM) 模型是使用Abaqus/标准2022开发的.
- 通过UMAT子程序,FEM结合了修改后的3D Hashin启动标准和Tserpes降解定律,以模拟内平面层和层间损伤.
主要成果:
- 开发的FEM模型与负载位移曲线的实验数据具有很高的相似性.
- 模拟的故障模式,包括矩阵压缩裂纹,纤维压缩故障和纤维矩阵剪切故障,与实验观察结果密切匹配.
- 该模型有效地捕捉了复杂的故障和负载转移现象在复合皮肤-链结构.
结论:
- 这项研究提出了一种高效准确的FEM模型,用于模拟复合材料的皮肤-链结构.
- 该模型显著提高了对这些关键飞机部件的故障和负载转移的理解和预测.
- 经过验证的模型可以协助复合材料航空航天结构的设计和安全评估.
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