CLC number:
On-line Access: 2023-12-29
Received: 2023-02-13
Revision Accepted: 2023-03-07
Crosschecked: 2024-01-04
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Wenze MAO, Yancheng WANG, Deqing MEI, Lingfeng XUAN, Caiying ZHOU. Numerical modeling and experimental study of microstamping process for fabricating microchannels using thin sheets of titanium[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2300083 @article{title="Numerical modeling and experimental study of microstamping process for fabricating microchannels using thin sheets of titanium", %0 Journal Article TY - JOUR
钛基薄板微流道的微冲压成形工艺数值建模与实验研究机构:1浙江大学,流体动力与机电系统国家重点实验室,中国杭州,310058;2浙江大学,浙江省先进制造技术重点实验室,中国杭州,310058 目的:钛基薄板微冲压成形时,钛基薄板的力学各向异性特点会导致薄板出现不同程度的回弹变形。本文旨在建立正交各向异性的弹塑性本构模型,用于准确预测钛基薄板的力学各向异性特点对微流道冲压成形时回弹变形和成形性能,分析模具尺寸参数(模具圆角半径、模具间隙、冲头宽度)对微流道冲压成形的影响规律,并对钛基薄板的取向和模具尺寸进行优选以提高冲压成形的精度。 创新点:1.基于偏轴弹性模量和希尔屈服准则,建立钛基薄板的正交各向异性弹塑性本构模型。2.建立钛基薄板微流道冲压成形工艺的数值仿真模型,并研究钛基薄板各向异性和模具参数对回弹变形和成形性能的影响规律。 方法:1.通过单向拉伸试验分析,基于偏轴弹性模量和希尔屈服准则推导出钛薄板各向异性的应力应变关系,并建立钛基薄板微流道冲压成形的仿真模型。2.通过与微冲压实验结果对比,验证仿真模型的准确性。3.通过仿真模拟,分析钛薄板的各向异性特性对微冲压的影响,并研究在不同模具尺寸参数下钛薄板的成形能力。 结论:1.正交各向异性本构模型能准确预测钛薄板弹塑性行为,建立的微冲压仿真模型可准确预测钛薄板的回弹变形量。2.在微冲压加工中钛薄板的各向异性导致不同取向的试样产生了不同程度的成形载荷和回弹。3.模具圆角半径、间隙和冲头宽度都与回弹呈正相关,与应力集中程度呈负相关;为降低断裂风险,选择RD试样和圆角半径为0.10mm的模具制造深度为279.3 μm、拔模角度为34.34°的流道。 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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