电缆弧增材制造:使用多物理模拟对工艺参数的研究
1Department of Mechatronics Engineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea.
Materials (Basel, Switzerland)
|December 9, 2023
概括
扫描模式和速度对丝弧增材制造 (WAAM) 中的残余应力产生了重大影响. 替代扫描模式可以最大限度地减少压力,而更高的扫描速度可以增加马石的形成.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 电弧增材制造 (WAAM) 是制造大型金属元件的关键技术.
- 了解过程-结构-属性关系对于优化WAAM至关重要.
- 其余应力和相位转换显著影响元件完整性.
研究的目的:
- 研究扫描模式和速度对热形状的影响.
- 在WAAM中分析相位转换和残余应力生成.
- 为控制WAAM过程参数提供见解.
主要方法:
- 使用ABAQUS UMAT开发一个有限元素 (FE) 数值模型.
- 将相位演变和转变可塑性纳入模型.
- 用不同的扫描策略和速度模拟WAAM沉积.
主要成果:
- 扫描模式显著影响热量的积累和冷却速度,影响剩余应力.
- 外入扫描模式导致最大的残余应力.
- 交替扫描模式导致最小的残余应力.
- 增加的扫描速度降低了峰值温度,加快了冷却,增加了马石体积分数.
结论:
- 扫描策略是减轻WAAM残留压力的关键参数.
- 扫描速度会影响热形状和马石的形成.
- 开发的FE模型为预测WAAM结果提供了一个有价值的工具.
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