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首页> 外文期刊>Journal of Materials Engineering and Performance >A Novel Approach to the Determination of Forming Limit Diagrams for Tailor-Welded Blanks
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A Novel Approach to the Determination of Forming Limit Diagrams for Tailor-Welded Blanks

机译：确定拼焊板成形极限图的新方法

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摘要

This paper presents the results of simulated hemispherical die stretching of laser-welded, low carbon steel (ST12 and ST14) blanks of various thicknesses. The simulations were designed to produce forming limit diagrams (FLDs) for the tailor-welded blanks. Multiple criteria, including the second time derivatives of major strain, thickness strain, and equivalent plastic strain extracted from the strain history of simulations, were used to accurately detect the start of necking in FLDs. This is to say that necking starts when the second derivative of the thickness strain, major strain or plastic strain reaches its maximum value. Knowing the onset of necking, one can measure the major and minor strains at the critical area and produce the corresponding FLD. Results from the proposed method and those from experimental tests are compared to demonstrate the efficiency of the proposed method.
机译：本文介绍了各种厚度的激光焊接低碳钢（ST12和ST14）毛坯的半球形模具拉伸的模拟结果。模拟的目的是为拼焊的坯料生成成形极限图（FLD）。多个标准（包括从模拟应变历史中提取的主要应变，厚度应变和等效塑性应变的二阶导数）用于精确检测FLD中的颈缩开始。这就是说，当厚度应变，主应变或塑性应变的二阶导数达到最大值时，缩颈开始。知道颈缩的发作，就可以测量关键区域的主要和次要应变，并产生相应的FLD。比较了所提方法和实验测试的结果，以证明所提方法的有效性。

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