JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (1): 90-96.doi: 10.6040/j.issn.1672-3961.0.2016.081

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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

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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

CLC Number: 

  • TG115.5
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