压缩剪切样本应力状态反应和分布特征与广泛的应力三轴性
Yiwei Xu1, Chunjiang Zhao1, Chen Wang1
1School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China.
Materials (Basel, Switzerland)
|March 28, 2024
概括
这项研究引入了一种新的压缩剪切样本,以模拟金属制条件. 新设计准确地捕捉了复杂的应力应变反应,改善了在制造过程中材料行为分析.
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
- 制造过程 制造过程 制造过程
背景情况:
- 传统的单轴测试方法不能复制复杂的多方向压缩和切削在金属制.
- 现有的样品设计无法准确地代表金属加工过程中变形诱导的负荷特征.
- 在现实条件下塑料进化的在线表征仍然是一个重大挑战.
研究的目的:
- 设计一种新的压缩剪切复合材料装载样本,模仿实际的金属制加工条件.
- 为了研究样品结构,特别是预设口角 (PNA) 对应力应变反应的影响.
- 在模拟滚动条件下阐明塑料反应,断裂行为和微观结构演变.
主要方法:
- 有限元件软件被用于精心设计压缩剪切复合材料装载样品.
- 五个304不钢样品经历了不同预设切口角 (PNA) 的单轴压缩负荷.
- 采用数字图像相关性 (DIC) 来捕捉和分析压缩期间的应变场演变.
主要成果:
- 设计的样本成功地复制了复杂的负载条件,类似于金属炼中的负载条件.
- 预设隙角度的变化显著影响了应力-应变反应和应变场分布.
- 数字图像相关性为局部塑料变形和应变局部化提供了详细的见解.
结论:
- 开发的压缩剪切样本有效地模拟金属的复杂负载场景.
- 样品设计,特别是PNA,极大地影响材料的塑性行为和变形特性.
- 这种方法增强了对复杂制造过程中的材料反应,断裂和微观结构变化的理解.
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