• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Experimental and Numerical Investigations of Constraint Effect on Deformation Behavior of Tailor-Welded Blanks
【24h】

Experimental and Numerical Investigations of Constraint Effect on Deformation Behavior of Tailor-Welded Blanks

机译：拼焊板变形行为的约束效应实验与数值研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Tailor-welded blanks (TWBs) have been considered as a productive sheet forming method in automotive industries. However, formability of TWBs is reduced due to different properties or thicknesses of the blanks and is a challenge for manufacturing designers. The plastic capacity of TWBs is decreased even when the material and thickness are the same. The constraint effect of the laser weld (including weld and heat-affected zone) material in the forming process of similar TWBs is a key problem to be solved in the research, development and application of thin-sheet TWBs. In this paper, uniaxial tensile tests with full-field strain measurement by digital image correlation and Erichsen tests are performed to investigate the constraint effect on deformation behavior and explore the mechanism of decreasing formability of similar TWBs. In addition, finite element models are conducted under ABAQUS code to further reveal the phenomenal behavior of the constraint effect. The results of the base material and welded blanks are compared for characterizing the differences. Furthermore, in order to better understand this mechanism, theoretical and numerical investigations are employed and compared to interpret the constraint effect of laser weld on the deformation behavior of TWBs. An index is proposed to quantify the constraint effect. Results show that the constraint effect of laser weld appears in both stretch forming and drawing of TWBs. Strain paths are approaching the plane strain condition as compared to the monolithic blank due to the constraint effect. Constraint effect is a major factor affecting the formability of TWBs when the failure occurs away from the weld seam.
机译：拼焊毛坯（TWB）在汽车工业中被认为是一种生产板材的方法。然而，由于毛坯的不同性质或厚度，TWB的可成形性降低了，这对制造设计师来说是一个挑战。即使材料和厚度相同，TWB的塑料容量也会降低。激光焊缝（包括焊缝和热影响区）材料在相似的TWB形成过程中的约束作用是薄板TWB研究，开发和应用中要解决的关键问题。本文通过数字图像相关的全场应变测量和Erichsen试验进行了单轴拉伸试验，以研究约束对变形行为的影响，并探讨降低类似TWB成形性的机理。此外，在ABAQUS代码下进行了有限元模型，以进一步揭示约束效应的惊人行为。比较基材和焊接毛坯的结果以表征差异。此外，为了更好地理解这种机理，采用了理论和数值研究方法，并进行了比较，以解释激光焊接对TWBs变形行为的约束作用。提出了一个指标来量化约束效应。结果表明，激光焊接的约束效应在TWB的拉伸成型和拉伸中均出现。由于约束效应，与整体式毛坯相比，应变路径接近平面应变条件。当失效发生在焊缝之外时，约束效应是影响TWB成形性的主要因素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号