定制焊接钢坯单点增量成形中应力、应变和厚度变化的数值分析

IF 2.9 3区 工程技术 Q2 AUTOMATION & CONTROL SYSTEMS International Journal of Advanced Manufacturing Technology Pub Date : 2024-03-23 DOI:10.1007/s00170-024-13422-0
Usman Attique, Shahid Ikramullah Butt, Aamir Mubashar, Liaqat Ali, Ghulam Hussain
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引用次数: 0

摘要

与整体板材的有限元建模相比,定制焊接坯料(TWBs)的有限元(FE)建模是一种复杂的现象,因为焊接过程会引起机械性能的变化。这种复杂性涉及对热效应产生的不同区域进行建模。本文通过数值方法研究了手工钨极惰性气体(TIG)焊接技术生产的不同厚度和强度的钢 TWB 的成形性,以及通过单点增量成形(SPIF)形成的涉及母材、焊瘤(WN)和热影响区(HAZ)的 TWB 的成形性。研究选择的材料包括深冲质量(DDQ)钢(DC06)和不锈钢(SS)(AISI 201)。试验采用可变壁角的截顶金字塔作为几何形状,并使用 FE 软件 Abaqus(动态显式求解器)进行分析。分析了厚度和强度差两种情况下的厚度曲线以及应力和应变状态。在两种情况下,都观察到边角处的厚度减小。然而,在强度差的情况下,这种减少更为明显。在厚度差的情况下,两侧的图案对称,应力的最小值和最大值都偏向较薄的一侧。在强度差的情况下,应力的变化在沿最大值方向的高强度材料一侧更为明显。在厚度差和强度差的情况下,观察到的等效塑性应变分别向较厚板材和强度较低材料的一侧更线性和更高。研究调查可以类似的方式用于精确研究汽车、船舶和医疗等多个行业使用的各种 TWB 的可成形性特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Numerical analysis of stress & strain and thickness variation in single point incremental forming of tailor welded steel blanks

Finite element (FE) modeling of tailor welded blanks (TWBs) is a complex phenomenon compared to FE modeling of monolithic sheets due to the change of mechanical properties caused by the welding process. This complexity involves modeling different zones generated due to the heat effect. Research on the formability of steel TWBs with dissimilar thicknesses and strength produced by manual tungsten inert gas (TIG) welding technique and formed by single point incremental forming (SPIF) involving base sheets, weld nugget (WN), and heat affected zone (HAZ) is presented, numerically. The materials selected for the study included deep drawing quality (DDQ) steel (DC06) and stainless steel (SS) (AISI 201). Variable wall angle truncated pyramid was used as test geometry, and FE software Abaqus (dynamic explicit solver) was used for the analysis. Thickness profiles and state of stress and strain in both the cases of thickness and strength differential were analyzed. A decrease in thickness was observed at the corners in both cases. However, this decrease was more prominent in the case of strength differential. The symmetry of the pattern on both sides with minimum and maximum values of stress towards the thinner side was observed in the case of thickness differential. Variation in stress was more prominent towards the side of high-strength material along maximum value in the case of strength differential. Equivalent plastic strain observed was more linear and higher towards the sides of thicker sheet and material having less strength in the case of thickness differential and strength differential, respectively. Research investigations may be applied in a similar fashion for the precise study of formability characteristics of various kinds of TWBs being used in multiple industries including automotive, vessel, and medical.

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来源期刊
CiteScore
5.70
自引率
17.60%
发文量
2008
审稿时长
62 days
期刊介绍: The International Journal of Advanced Manufacturing Technology bridges the gap between pure research journals and the more practical publications on advanced manufacturing and systems. It therefore provides an outstanding forum for papers covering applications-based research topics relevant to manufacturing processes, machines and process integration.
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