基于Almen强度测试的离散有限元素分析模型,用于评估真实射击Peening残余应力
Chengan Wang1, Yujin Park1, Taehyung Kim2
1Graduate School, Department of Mechanical and Aeronautical System Engineering, Cheongju University, 298 Daeseong-ro, Cheongju-si 28503, Republic of Korea.
Materials (Basel, Switzerland)
|August 12, 2023
概括
本研究引入了一种结合的离散有限元模型,以准确预测射击的剩余应力. 经过验证的模型有效模拟随机射击冲击,为物理测试提供可靠的替代方案.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- 射击削是一种关键的表面处理工艺,用于诱导压缩残余应力.
- 准确预测残余应力对于材料疲劳寿命和性能至关重要.
- 目前用于剩余应激评估的方法可能耗时且资源密集.
研究的目的:
- 开发和验证一个结合的离散有限元模型,用于评估射击磨损残余应力.
- 将Almen强度测量集成到模拟中,以实现现实的过程复制.
- 建立一种计算方法,有可能取代物理射击查实验.
主要方法:
- 利用离散元件分析 (DEA) 模拟弹子的随机撞击.
- 使用有限元分析 (FEA) 来量化诱导的残余应力.
- 将Almen强度测量测试原理纳入模型.
- 通过比较分析和实验阿尔门曲线来验证模型.
- 扩展了单元细胞模型,用于预测Peening余应力.
主要成果:
- 离散有限元素模型准确地模拟了弹球的随机行为.
- 该模型显示了分析和实验阿尔曼曲线之间的良好一致.
- 在预测和X射线衍射 (XRD) 测量的残余应力之间发现了显著的相关性.
- 模拟有效地预测了剩余应力分布和大小.
结论:
- 拟议的离散有限元随机影响分析模型是预测射击压力的有效工具.
- 这种计算方法可以作为实际射击选过程的可行替代品.
- 整合Almen强度可以提高模型的预测准确性和适用性.
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