铁路货车的损坏演变机制 波吉适配器 1035 钢和损坏参数校准 基于Gursone-Tvergaarde-Needleman模型
Jiachuan Yin1, Xiaomin Huang1, Guangzhi Ma2
1College of Mechanical Engineering, North China University of Science and Technology, Tangshan 063210, China.
Materials (Basel, Switzerland)
|October 26, 2024
概括
这项研究调查了AISI 1035钢的损伤行为,这对于铁路车形适配器至关重要. 研究人员使用实验数据校准了Gurson-Tvergaard-Needleman (GTN) 模型,以预测造过程中的材料缺陷.
科学领域:
- 材料科学与工程 材料科学与工程
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- 由于关键的火车安全功能,铁路车机形适配器需要高质量.
- 造缺陷,如AISI 1035钢中的空隙和裂,降低了部件的使用寿命.
- 了解材料损坏行为对于优化造过程至关重要.
研究的目的:
- 为了研究AISI 1035钢在各种高温和拉伸率条件下的损伤行为.
- 为了对AISI 1035钢的Gurson-Tvergaard-Needleman (GTN) 损伤模型参数进行校准.
- 用有限元分析和实验数据验证校准的GTN模型.
主要方法:
- 在AISI 1035钢上进行了在900°C,1000°C和1100°C的单轴拉伸试验,拉伸率为0.1,1和10s-1.1.
- 扫描电子显微镜 (SEM) 分析了不同变形阶段的微观结构损伤.
- 格森-特维加德-尼德尔曼 (GTN) 模型参数 (q1,q2,q3) 使用拉姆伯格-奥斯古德模型和应力-应变曲线拟合进行校准.
- 图像Pro Plus软件量化了多孔度 (f0, fn, fc, fF).图像ProPlus软件量化了多孔度 (f0, fn, fc, fF).图像ProPlus软件量化了多孔度 (f0, fn, fc, fF).
- 一个有限元模型模拟了拉伸行为,结果与实验数据进行了比较.
主要成果:
- 在模拟造条件下,获得了AISI 1035钢的应力-延展曲线.
- 对GTN车型的损坏参数成功校准.
- 量化孔径水平 (f0,fn,fc,fF) 通过实验来确定.
- 有限元模拟与实验结果有很好的一致性,验证了校准的损坏参数.
结论:
- 校准的GTN模型准确地预测了造过程中AISI 1035钢的损坏行为.
- 有限元反向方法为获得物质损坏参数提供了一种可靠的方法.
- 这项研究有助于提高铁路货车轮适配器的质量和使用寿命.
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