带孔方板对角拉伸的起皱失稳特性测试与分析

doi:10.11896/cldb.20070277

材料导报

2021, Vol. 35

Issue (16): 16144-16148 https://doi.org/10.11896/cldb.20070277

金属与金属基复合材料

带孔方板对角拉伸的起皱失稳特性测试与分析

杨西鹏¹, 唐浩兴², 王连轩¹, 李晓广¹, 刘龙琴², 温彤²

1 河钢集团邯钢公司,邯郸 056015;
2 重庆大学材料科学与工程学院,重庆 400044

Test and Analysis of Wrinkling Characteristics of Square Plates with Prefabricated Holes

YANG Xipeng¹, TANG Haoxing², WANG Lianxuan¹, LI Xiaoguang¹, LIU Longqin², WEN Tong²

1 HBIS Handan Iron & Steel Group Co.,Ltd., Handan 056015, China;
2 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

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摘要传统方板对角拉伸试验(Yoshida buckling test,YBT)方法在测量板料起皱性能时,能够得到的应力状态有限,不能全面评估板料在复杂工况下抵抗失稳起皱的能力。本工作提出一种带内孔YBT试样单向拉伸的板料起皱性能测试方法,利用数值模拟与实验研究了带不同大小圆孔YBT试样拉伸过程的受力与变形特征,探讨了内孔对试样应力分布及起皱行为的影响。研究表明,内孔改变了YBT试样平面内的应力分布,且内孔轴向两端存在压应力,横向两侧存在拉应力;随着孔径增大,横、轴向应力比增大,最大压应力位置应力状态发生改变,由横向受压、轴向受拉转为双向受压;孔径较大时,内孔侧边区域会出现二次起皱现象。

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	杨西鹏
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	刘龙琴
	温彤

关键词: 方板对角拉伸起皱圆孔复杂工况应力状态

Abstract: The available stress distribution states in conventional Yoshida buckling test (YBT) for testing the sheet buckling properties are limited, thus it is difficult to evaluate the wrinkle-resistant performance of sheet metals under complex forming conditions. In this paper, a method for examining the wrinkling property of sheet metal, using uniaxial tensile tests of YBT samples with circular inner hole in the geometric center, was proposed. The force and deformation characteristics of specimens with various holes during uniaxial tensile tests were qualitatively analyzed, using finite element simulation and physical experiments, the influences of holes on the in-plane transverse stress distribution form and wrinkling behavior were addressed. It was found that circular hole changes the in-plane stress distribution of YBT samples, the compressive stress lies on the both axial sides of the hole while the tensile stress on both transverse sides. The ratio of transverse and axial stress increases with the hole diameter, and the stress state of the maximum compressive stress position changes from transverse compression and axial tension into bidirectional compression. Secondary wrinkling behavior appears in side areas when the hole diameter is large.

Key words: Yoshida buckling test wrinkling circular hole complex forming conditions stress state

发布日期: 2021-09-07

ZTFLH:

TG306

基金资助: 重庆市自然科学基金(cstc2018jcyjAX0159)

通讯作者: wentong@cqu.edu.cn

作者简介: 杨西鹏,大学本科,高级工程师,2008年毕业于太原理工大学金属材料工程专业,现在河钢集团邯钢公司技术中心从事冷轧汽车板研发和应用技术研究工作.
温彤,重庆大学教授,博士研究生导师。1999年毕业于重庆大学并取得博士学位。主要从事金属板料成形工艺、理论及应用研究。在国内外学术期刊上发表论文50余篇,获授权国家发明专利10余项,主持和参与基金项目40余项。

引用本文:

杨西鹏, 唐浩兴, 王连轩, 李晓广, 刘龙琴, 温彤. 带孔方板对角拉伸的起皱失稳特性测试与分析[J]. 材料导报, 2021, 35(16): 16144-16148.
YANG Xipeng, TANG Haoxing, WANG Lianxuan, LI Xiaoguang, LIU Longqin, WEN Tong. Test and Analysis of Wrinkling Characteristics of Square Plates with Prefabricated Holes. Materials Reports, 2021, 35(16): 16144-16148.

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http://www.mater-rep.com/CN/10.11896/cldb.20070277 或 http://www.mater-rep.com/CN/Y2021/V35/I16/16144

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