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山东大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 90-96.doi: 10.6040/j.issn.1672-3961.0.2016.081

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压痕对不锈钢材料表面残余应力的影响

苏成功1,2,刘燕1,2,王威强1,2*, 王玉花3   

  1. 1.山东大学机械工程学院, 山东 济南 250061;2.山东省特种设备安全工程技术研究中心, 山东 济南 250061;3.山东恒河机械制造有限公司, 山东 淄博 255000
  • 收稿日期:2016-03-07 出版日期:2017-02-20 发布日期:2016-03-07
  • 通讯作者: 王威强(1959— ), 男,山东青岛人,教授,博导,主要研究方向为失效分析和结构完整性评估. E-mail:wqwang@sdu.edu.cn E-mail:980745688@qq.com
  • 作者简介:苏成功(1989— ), 男,山东青岛人,硕士研究生,主要研究方向为压痕法测试材料力学性能. E-mail:980745688@qq.com
  • 基金资助:
    国家自然科学基金面上资助项目(51475269);国家重点基础研究发展计划(973计划)资助项目(2011CB013401)

The influence of indentation on the surface residual stress of stainless steel

SU Chenggong1,2, LIU Yan1,2, WANG Weiqiang1,2*, WANG Yuhua3   

  1. 1. School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. Engineering and Technology Research Center for Special Equipment Safety of Shandong Province, Jinan 250061, Shandong, China;
    3. Henghe Machinery Manufacturing Co., Ltd. of Shandong Provence, Zibo 255000, Shandong, China
  • Received:2016-03-07 Online:2017-02-20 Published:2016-03-07

摘要: 为研究自动球压痕过程残留压痕残余应力分布情况,以压力容器常用的奥氏体不锈钢板材S30408、S32168、 S31603 和 S30403为对象,通过常规拉伸试验获得材料的本构关系及自动球压痕试验获得压痕过程的载荷-位移曲线,采用有限元软件ABAQUS进行模拟。试验结果表明:压头卸载后,压痕凹坑底部材料承受的残余压应力达到最大,Mises应力状态下最大残余应力约为700 MPa左右,压痕残余应力影响范围在受压面上大约占球形压头半径的1.3%。同时,对材料施加一定大小的外载荷拉应力,研究残余应力和外载荷共同作用下压痕周围材料的应力分布状况,结果显示最大叠加应力出现在压痕材料堆积区域,但是应力影响区域很小,影响深度为所受影响平面半径的6%以内。

关键词: 材料力学性能, 有限元, 自动球压痕, 残余应力, 应力集中

Abstract: In order to obtain the residual stress distribution around the residual indentation, the austenitic stainless steel sheets of S30408, S32168, S31603 and S30403 were chosen as the research materials. The constitutive relations of the materials were acquired by the tensile tests, and the force-depth curves were obtained by the ABI tests. The ABI process was simulated by finite element software ABAQUS; The results showed that the maximum value of the residual stress under Mises stress state is about 700 MPa, and the residual stress exists within the area of 1.3% of the ball radius. In addition, the stress concentration around the indentation under the action of external tensile load was studied. The results showed that the maximum superposition stress appears in the indentation materials accumulating area, and the influence range in the thickness direction was limited within 6% of the influence radius.

Key words: automated ball indentation, mechanical properties of materials, finite element, residual stress, stress concentration

中图分类号: 

  • TG115.5
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