| 引用本文: | 陈水生,林建平,辛立久.拼焊板焊缝方向对其单向拉伸性能的影响研究[J].材料科学与工艺,2010,18(4):480-485.DOI:10.11951/j.issn.1005-0299.20100409. |
| CHEN Shui-sheng,LIN Jian-ping,XIN Li-jiu.Effect of welding orientation on tensile properties of tailor welded blanks[J].Materials Science and Technology,2010,18(4):480-485.DOI:10.11951/j.issn.1005-0299.20100409. |
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| 摘要: |
| 为提高拼焊板成形性,用单拉实验来研究拼焊板焊缝方向对其拉伸性能的影响.采用解析、实验和有限元法研究了拼焊板焊缝方向对其综合延伸率、失效模式的影响.结果表明,当焊缝角度较小时,失效表现为焊缝开裂;随着焊缝角度增大,平均延伸率非线性减小,且变化速率逐渐减小.当焊缝角度超过一定值后,失效变为薄侧母材开裂,并随着焊缝角度增大拼焊板综合延伸率逐渐增大,且增大的速率逐渐减小.在失效模式转换时,焊缝角度相应存在一个临界点,这一临界角度大小主要依赖于焊缝和薄侧母材性能.适当的焊缝角度有利于拼焊板成形性能的提高和失效模式的控制. |
| 关键词: 拼焊板 焊缝方向 综合延伸率 理论模型 |
| DOI：10.11951/j.issn.1005-0299.20100409 |
| 分类号:TG456.7 |
| 基金项目:高等学校博士学科点专项科研基金(20070247025) |
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| Effect of welding orientation on tensile properties of tailor welded blanks |
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CHEN Shui-sheng, LIN Jian-ping, XIN Li-jiu
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College of Mechanical Engineering,Tongji University,Shanghai 201804,China
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| Abstract: |
| To improve the formability of tailor welded blanks(TWBs),the effect of welding orientation on a TWB was studied in uniaxial tensile tests.Analytical,experimental and simulating methods were employed to study the effect of welding orientation on entire elongations and failure patterns of TWBs.The results show that failure occurs across the weld line when the angle is small.As the angle increases,the entire elongation decreases nonlinearly and the rate also decreases.When the angle is over a certain degree,failure occurs in the thinner sheet and the entire elongation increases with the increasing angle,but the rate decreases gradually.In failure patterns transforming,there exists a critical value of welding orientation which determines the failure pattern,and it depends on the properties of weld line and thinner sheet of TWBs.Proper welding orientation contributes to the formability improvement of a TWB and the failure pattern control. |
| Key words: tailor welded blanks(TWBs) welding orientation entire elongation analytical model |
