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双孔微剪切评定焊接接头的局部强度

蔡淑娟, 朱亮, 张忠发

蔡淑娟, 朱亮, 张忠发. 双孔微剪切评定焊接接头的局部强度[J]. 焊接学报, 2016, 37(4): 43-46.
引用本文: 蔡淑娟, 朱亮, 张忠发. 双孔微剪切评定焊接接头的局部强度[J]. 焊接学报, 2016, 37(4): 43-46.
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CAI Shujuan, ZHU Liang, ZHANG Zhongfa. Evaluation of local strength of welding joint by using double holes micro shear test[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 43-46.
Citation: CAI Shujuan, ZHU Liang, ZHANG Zhongfa. Evaluation of local strength of welding joint by using double holes micro shear test[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 43-46.
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双孔微剪切评定焊接接头的局部强度

  • 兰州理工大学省部共建有色金属先进加工与再利用国家重点试验室, 兰州 730050

基金项目: 国家自然科学基金资助项目(51264026)

Evaluation of local strength of welding joint by using double holes micro shear test

  • State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China

摘要

    摘要
  • 摘要: 提出一种评价力学性能不均匀焊接接头强度的方法,研制了测量材料局部力学性能的双孔微剪切试验装置,对焊接接头各区域进行微剪切试验.记录加载过程中载荷传感器和位移传感器传输的数据,转化得到剪切应力-应变曲线.建立双孔微剪切试验的有限元模型,选择不同屈服应力和加工硬化指数的材料进行有限元模拟,建立试验剪切应力,应变曲线与材料强度参数的相关性,并利用拉伸试验对其准确性进行了验证.结果表明,利用双孔微剪切试验曲线可直接得到材料的强度参数,并利用双孔微剪切试验测定X70管线钢焊接接头上各区的强度.
    Abstract: A new approach, double holes micro shear test, is presented for determining the localplastic deformation properties in welded joints. A device for measuring the local mechanical properties of materials is developed and the micro shear test of the welded joint is carried out.The response between applied load and indentor displacement is recoroled. shear stress-strain curve. the finite element model of double hole micro-shear test is established. The finite element computation were carried out for various combination of yield stress and work hardening exponent. The equations were constructed to material strength properties and load-displacement curves from double holes micro-shear tests. The accuracy of this equations method is validated by tensile test. The results show that the material strength properties can be obtained directly from the experimental curves with double hole micro-shear test. The local distortion properties in X70 pipeline steel welded joints were evaluated by double holes micro shear test.
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    • 参考文献(9)
  • [1] 朱亮, 陈剑虹. 热影响区软化焊接接头应力分布特征及强度预测[J]. 焊接学报, 2004, 25(3):61-65. Zhu Liang, Chen Jianghong. Characteristics of stress distribution and prediction of strength in heat affected zone softened welded joints[J]. Transactions of the China Welding Institution, 2004, 25(3):61-65.
    [2] 史耀武, 周宁宁, 张新平, 等. 微剪切试验及对焊接接头力学性能的评价[J]. 焊接学报, 1994, 15(4):235-240. Shi Yaowu, Zhou Ningning, Zhang Xinping, et al. Microshear test and its evaluation to mechanical properties of welded joints[J]. Transations of the China Welding Institution, 1994, 15(4):235-240.
    [3] Umekuni A, Masubuchi K. Usefulness of under matched welds for high-strength steels[J]. Welding Journal, 1997, 76(7):256-263.
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    [5] 雷斌隆. 评定铝合金焊接接头力学性能的新途径[J]. 机械工程材料, 2004, 28(4):13-15. Lei Binlong. A new way of mechanical properties of welded joints in evaluation of aluminum alloy[J]. Mechanical Engineering Materials, 2004, 28(4):13-15.
    [6] LaVan D A. Microtensile properties of weld metal[J]. Experimental Techniques, Wilson Applied Science & Technology Abstracts, 1999, 23(3):30-34.
    [7] Zhang X P, Dorn L. Estimation of the local mechanical properties of pipeline steels and welded joints by use of themicro shear test method[J]. International Journal of Pressure Vessels and Piping, 1998, 75(4):37-42.
    [8] 朱亮, 任国松, 龙林, 等. 双孔微剪切测定铝合金焊接接头的局部本构特性[J]. 材料工程, 2007(10):18-22. Zhu Liang, Ren Guosong, Long lin, et al. Determination of local constitutive properties of welded joints in aluminum alloy using double holes micro shear test[J]. Journal of Materials Fngineering, 2007(10):18-22.
    [9] 朱亮, 陈剑虹. 力学性能不均匀焊接接头的强度预测[J]. 焊接学报, 2005, 26(3):48-51. Zhu Liang, Chen Jianhong. Prediction of tensile properties of welded joint with mechanical heterogeneity[J]. Transactions of the China Welding Institution, 2005, 26(3):48-51.
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出版历程
  • 收稿日期:  2015-03-05

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