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扭转弹的疲劳寿命分析基于连续损伤力学
Dehai Meng1, Changming Zhang1,2,3, Fan Yang1,2,3
1School of Mechanical Engineering, Shaanxi University of Technology, Hanzhong 723001, China.
Materials (Basel, Switzerland)
|January 25, 2025
概括
一个新的UMAT子程序准确地预测合金扭矩弹疲劳寿命,降低实验成本. 这种方法的平均误差为2.04%,满足了航空应用的工程需求.
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:
- 由合金制成的扭矩弹是航空领域的关键部件.
- 准确的疲劳寿命预测对于确保这些弹的可靠性和安全性至关重要.
- 现有的预测方法可能无法完全捕捉复杂的故障机制.
研究的目的:
- 开发和验证合金扭转弹的新型疲劳寿命预测模型.
- 将拟议模型的准确性与现有的疲劳寿命预测方法进行比较.
- 为了减少与广泛的实验测试相关的时间和经济成本.
主要方法:
- 使用基于连续损伤力学理论的定制UMAT子程序.
- 在各种条件下对合金扭矩弹进行了疲劳寿命分析.
- 将预测的疲劳寿命与来自多个弹的实验测试结果进行比较.
主要成果:
- 与实验数据相比,定制的UMAT子程序显示出高准确性,平均相对误差为2.04%.
- 在不同温度 (60,80,100,120度) 的预测疲劳寿命分别为45,070,65,067,99,677和181,322个周期.
- 与其他预测技术相比,拟议的方法与实验结果的一致性更高.
结论:
- 开发的UMAT子程序和连续损伤力学模型有效地预测了合金扭矩弹的疲劳寿命.
- 该方法满足工程测量要求 (误差<5%),并可显著降低实验成本.
- 验证模型为优化航空组件设计和改善结构完整性提供了至关重要的支持.
相关概念视频
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01:15Thin-Walled Hollow Shafts
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01:18Stress Concentrations in Circular Shafts
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01:23Euler's Formula to Columns: Problem Solving
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01:16Torsion of Noncircular Members
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01:12Temperature Dependent Deformation
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