裂大小和不匹配对接关节骨折行为的影响
Aleksandar Sedmak1,2, Elisaveta Doncheva3, Bojan Medjo4
1Faculty of Mechanical Engineering, University of Belgrade, Kraljice Marije 16, 11120 Belgrade, Serbia.
Materials (Basel, Switzerland)
|July 14, 2023
概括
本研究分析了裂大小和不匹配如何影响高强度低合金钢 (HSLA) 接接头的断裂行为. 结果揭示了关于裂尖领域的关键见解,以及不匹配接的约束效应.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 结构完整性 结构完整性
背景情况:
- 高强度低合金钢 (HSLA) 中不匹配的接接头容易发生裂纹行为,受裂纹大小和材料不匹配的影响.
- 了解这些影响对于确保接元件的结构完整性和安全性至关重要.
研究的目的:
- 通过实验和数值分析HSLA钢接接头的断裂行为,其裂大小不同,并且不匹配.
- 调查裂大小和未匹配对裂尖领域和约束效应的影响.
主要方法:
- 使用张力计和裂口开口位移 (CMOD) 测量装置进行实验分析,以确定J积分.
- 对于普通金属 (BM) 和接金属 (WM) 的三维有限元素方法 (FEM) 模拟具有明显的拉伸性能.
- 对SUMITEN SM 80P HSLA钢及其接金属的抗拉面板中小型和大型裂纹的J-CMOD曲线的评估.
主要成果:
- 对J-CMOD曲线的详细评估,用于不匹配的拉伸板中的小型和大型裂.
- 数字分析提供了关于裂纹尖端领域的新见解,以及与不足匹配和裂纹大小相关的约束效应.
- 来自拉伸板的实验数据补充了之前的全面原型调查.
结论:
- 结合实验和数值方法,可以全面了解HSLA钢接中的裂大小和不匹配效应.
- 结果有助于改善在不匹配的接结构中断裂行为的预测模型.
- 该研究强调了考虑裂大小和材料不匹配对于准确的结构完整性评估的重要性.
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