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使用热弹性-塑料有限元件方法预测接变形,考虑接间距温度
Young-Hwan Han1, Hun-Bong Lim2, Tae-Sung Shin3
1Department of Mechanical Design Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
Materials (Basel, Switzerland)
|August 10, 2024
概括
这项研究引入了一种热弹性-塑性有限元件方法 (TEP-FEM),该方法可以考虑通路间温度,显著减少接变形预测错误. 最佳通路间温度对于最小化预测多通路扭曲的误差至关重要.
科学领域:
- 工程 工程师 工程师 工程师
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
背景情况:
- 预测接变形对于结构完整性至关重要.
- 现有的热弹性-塑性有限元素方法 (TEP-FEM) 往往忽略了交叉通道温度效应.
- 多通引入复杂的热循环,影响剩余应力和变形.
研究的目的:
- 开发和验证一个采用TEP-FEM方法的方法,其中包括通路间温度,以准确预测接变形.
- 量化交叉路口温度对角扭曲和整体变形误差的影响.
- 建立在接模拟中选择最佳通路间温度的准则.
主要方法:
- 通过整合交叉通道温度考虑 (200°C至1000°C) 实现了一个TEP-FEM.
- 执行同时进行热和机械分析以捕捉短暂的效应.
- 评估温度历史和接时间以及变形预测.
主要成果:
- 与室温冷却相比,角度扭曲预测的准确性得到了改进,将误差从16.75mm降至10.9mm.
- 与基于应变的边界方法相比,变形预测误差明显减少,从6.14%降至2.92%.
- 确定交叉通道温度超过800°C可能导致变形误差增加.
结论:
- 将通路间温度纳入TEP-FEM对于准确的接变形预测至关重要.
- 选择最佳的通路间温度对于最小化多通道接中的预测错误至关重要.
- 拟议的方法为分析和控制接引起的扭曲提供了更精确的工具.
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