对C1100纯铜管的可成形性评估,考虑一个增强的修改最大力标准
Ngoc Anh Pham1,2, Quoc Tuan Pham2, Van Duy Dinh2
1School of Mechanical Engineering, Vietnam Maritime University, Hai Phong 180000, Vietnam.
Materials (Basel, Switzerland)
|May 14, 2025
概括
这项研究适应了修改的最大力标准 (MMFC2) 和Marciniak-Kuczynski (MK) 模型,用于预测铜管中的成形极限图 (FLD). 在实验验证中,MMFC2模型与MK模型相比显示出更高的准确性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 制造过程 制造过程 制造过程
背景情况:
- 像修改最大力标准 (MMFC) 和Marciniak-Kuczynski (MK) 等应变局部化模型对于预测金属成型中的材料故障至关重要.
- 这些模型最初是为金属板开发的,它们对管状材料的适用性需要研究.
研究的目的:
- 评估MMFC和MK模型对C1100纯铜管的成型极限图 (FLD) 的预测能力.
- 为管状材料开发和验证一个增强的MMFC模型 (MMFC2).
- 评估理论FLDs在有限元分析 (FEA) 中的整合,以预测管子破裂.
主要方法:
- 使用Swift-Voce硬化定律进行了单轴拉伸试验,以描述C1100纯铜管的硬化行为.
- 开发了一个MATLAB代码,使用增强的MMFC2和标准的MK模型理论预测FLD.
- 使用管膨胀试验进行实验验证.
- 有限元模拟将预测的FLD纳入预测管破裂行为.
主要成果:
- 构成模型准确地捕获了铜管的硬化行为.
- 使用MMFC2和MK模型生成理论FLD.
- 管膨胀试验的实验结果验证了理论FLD预测.
- MMFC2模型与MK模型相比,与实验FLD数据更接近.
- 使用MMFC2预测的FLD进行的FEA模拟有效预测了管子破裂.
结论:
- 与传统的Marciniak-Kuczynski (MK) 模型相比,增强的修改最大力标准 (MMFC2) 模型在管状材料中预测形成极限图 (FLD) 的准确性得到了提高.
- MMFC2模型具有显著的潜力,可以提高成型过程的模拟精度和管制造中的故障预测.
- 将理论上得出的FLD集成到FEA中,为预测管道的破裂行为提供了一个有价值的工具.
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