一种经过修改的约翰逊库克基于模型的卡尔曼波器方法,以确定可持续AA6082Al合金的热流行为
Bandar Alzahrani1, Ali Abd El-Aty1, Sherif A Elatriby2,3
1Department of Mechanical Engineering, College of Engineering at Al Kharj, Prince Sattam Bin Abdulaziz University, Al Kharj 11942, Saudi Arabia.
Materials (Basel, Switzerland)
|November 9, 2024
概括
这项研究引入了一种新的修改的约翰逊-库克 (JC) 模型 (PJCM),以准确预测AA6082合金的热变形行为. 与现有模型相比,PJCM表现出卓越的可靠性,提高了制造工艺.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 可持续制造 可持续制造 可持续制造
背景情况:
- AA6082合金对于可持续发展至关重要,它提供可回收性,并使轻量级设计能够减少排放.
- 然而,有限的室温可塑性需要高温加工,需要准确的构成模型.
- 了解不同温度 (T) 和延展率 (ε ̇) 下的合金行为对于组件制造至关重要.
研究的目的:
- 提出和验证一种新的修改的约翰逊-库克 (JC) 模型,称为PJCM,用于预测AA6082合金的热流行为.
- 将拟议的PJCM与原始JC模型 (OJCM) 和之前修改的JC模型 (LMJCM) 的预测准确度进行比较.
- 分析温度,应变和应变速率相互作用对合金在热变形过程中的行为的影响.
主要方法:
- 在广泛的温度和拉伸率下,对AA6082合金流应力的实验性确定.
- 开发一种新的修改后的约翰逊-库克可塑性模型 (PJCM).
- 使用相关系数 (R),平均绝对相对误差 (AARE) 和根平均平方误差 (RMSE) 对PJCM,OJCM和LMJCM进行比较分析.
主要成果:
- 拟议的PJCM在预测AA6082合金的热/热流应力方面表现出高可靠性.
- PJCM的预测与实验数据密切匹配,表现优于或匹配OJCM和LMJCM.
- 该研究确定了复杂的非线性行为,归因于热变形期间应变速率,应变和温度之间的相互作用.
结论:
- 开发的PJCM提供了一个改进的构成模型,用于准确模拟AA6082合金的热变形.
- 这种增强的建模能力支持从这些可持续材料中高效,可靠地制造组件.
- 建议进一步研究变形参数的相互作用,以充分理解复杂的非线性行为.
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