预测6062 T6材料的应力强度因子在L形下控制臂 (LCA) 设计中使用扩展有限元分析
Said El Fakkoussi1, Sorin Vlase2,3, Marin Marin4,5
1Mechanical Engineering Laboratory, Faculty of Sciences and Techniques, P.O. Box 2202 Route Imouzzer, Fes 30000, Morocco.
Materials (Basel, Switzerland)
|January 11, 2024
概括
这项研究分析了汽车下部控制臂的裂,发现6062 T6比钢更快失效. 断裂力学模拟显示了材料稳定性和车辆安全性的关键裂深度.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 汽车工程 汽车工程
背景情况:
- 汽车下部控制臂,特别是用6062T6制成的控制臂,在静态和碰撞测试中容易因裂而发生故障.
- 了解这些部件的断裂行为对于确保车辆安全和可靠性至关重要.
- 现有的研究往往缺乏在汽车应力条件下的合金中裂传播的详细描述.
研究的目的:
- 为了研究由6062 T6.6制成的破裂的下控制臂的故障机制.
- 用断裂力学参数来描述断裂行为,特别是应力强度因子 (KI).
- 为了在类似的负载条件下比较6062T6与钢的裂纹稳定性.
主要方法:
- 使用Abaqus/CAE进行有限元法 (FEM) 模拟,以确定应力度和负载极限.
- 扩展的有限元法 (XFEM) 模拟裂的启动和传播,分析应力强度因子 (KI).
- 在故障分析中应用引分离定律和最大主应力 (MAXPS) 标准.
主要成果:
- 数字模拟确定了下控制臂与车辆平台的固定点上的应力度和裂纹的开始.
- 该组件的最大承载能力被确定为低于4900N以获得最佳性能.
- 6062T6在0.6的深度比率 (a/t) 上表现出不稳定的裂传播,而钢则保持稳定,直至0.8.8的比率.
结论:
- 该研究强调了6062 T6下控制臂的不稳定性的关键裂深度,这表明与钢相比,故障风险更高.
- 断裂力学参数为破裂的汽车部件的行为提供了宝贵的见解.
- 结果与实验数据一致,并为汽车行业的材料选择和设计提供指导.
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