一个3D弹性塑料构成模型,考虑T700/PEEK热塑复合材料的渐进性损伤行为
Weigang Fu1, Huanjie Xiong1, Zhe Liao1
1College of Aviation Engineering, Civil Aviation Flight University of China, Guanghan 618330, China.
Materials (Basel, Switzerland)
|July 13, 2024
概括
一个新的构成模型准确地预测了碳纤维增强聚合物 (CFRP) 复合材料的行为. 该模型增强了T700/PEEK等热塑性树脂的结构设计和安全性.
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:
- 碳纤维增强聚合物复合材料 (CFRP) 与热塑性树脂由于其机械性能至关重要.
- 准确的构成模型对于CFRP组件的结构设计和安全至关重要.
- 现有的模型可能无法完全捕捉这些材料复杂的弹性塑料和损伤行为.
研究的目的:
- 开发和验证热塑性CFRP的新型两参数,三维 (3D) 构成模型.
- 通过使用Langmuir函数来整合塑料潜力和硬化行为.
- 模拟T700/PEEK复合材料的3D弹性塑料损伤行为.
主要方法:
- 制定了一个两参数的3D塑料潜力,包括偏差和扩展变形.
- 使用Langmuir函数来建模塑料硬化.
- 对T700/PEEK样品进行了各种离轴角度的拉力测试.
- 在MATLAB中使用准牛顿算法来确定材料参数.
- 开发了一个VUMAT子程序,包含最大应力和LaRC05故障模拟标准.
主要成果:
- 拟议的构成模型成功地捕捉了T700/PEEK的弹性塑料损伤行为.
- 数字模拟显示,与实验负载位移曲线和断裂角度的良好一致.
- 该模型准确地预测了不同轴外负荷条件下的材料反应.
结论:
- 开发的双参数3D构成模型,结合Langmuir硬化功能,为热塑性CFRP提供了可靠的框架.
- 模型通过实验和数值比较的验证证实其用于结构设计和安全评估的准确性.
- 这项工作促进了复杂复合材料行为的理解和预测能力.
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