研究一种类型的PC/ABS复合材料的动态故障行为
Jiayu Zhou1, Zhaodong Xia1, Dongfang Ma2
1Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, China.
Materials (Basel, Switzerland)
|April 27, 2024
概括
聚碳酸/烯酸/布他 (PC/ABS) 复合材料具有取决于温度的机械性能. 这项研究开发了一种经过验证的PC/ABS构成模型,这对于预测安全气囊盖的性能至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 聚合物复合材料 聚合物复合材料
背景情况:
- 聚碳酸/烯酸丁 (PC/ABS) 复合材料广泛用于汽车应用,特别是用于安全气囊盖.
- 了解PC/ABS在各种条件下的机械行为对于确保安全性和性能至关重要.
研究的目的:
- 研究温度和拉伸率对PC/ABS复合材料机械性能的影响.
- 为PC/ABS开发和验证一个包含热效应和故障标准的构成模型.
- 在目标板入侵场景中模拟和验证材料的性能.
主要方法:
- 在PC/ABS复合材料上进行了不同温度和拉伸率的单轴拉伸实验.
- 数字图像相关性 (DIC) 用于故障分析.
- 使用Abaqus有限元素分析 (FEA),使用反向方法来确定约翰逊-库克构成参数.
- 进行了FEA模拟的单轴拉伸试验和目标板侵入,并与实验数据进行了比较.
主要成果:
- 温度上升降低了PC/ABS复合材料的产量应力,增加了PC/ABS复合材料的破裂应力.
- 与温度相比,应变速率对机械性能的影响不那么大.
- 开发的约翰逊-库克构成模型准确地预测了材料在模拟中的反应.
- 在FEA的模拟中,拉力测试和目标板侵入的实验结果与FEA的模拟结果非常相匹配.
结论:
- PC/ABS复合材料的机械性能受到温度的显著影响.
- 经过验证的构成和故障模型为模拟汽车安全部件PC/ABS行为提供了可靠的工具.
- 该研究证实了开发的模型适合预测复杂的装载场景,如目标板侵入.
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