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Acta Armamentarii ›› 2012, Vol. 33 ›› Issue (6): 712-717.doi: 10.3969/j.issn.1000-1093.2012.06.013

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Study on Measurement of Residual Stresses in Forged Barrel Surface

LIU Li-li 1, FAN Li-xia 1, DONG Xue-hua 2   

  1. (1.School of Mechanical Engineering,Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;2.School of Science, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)
  • Received:2011-03-03 Revised:2011-03-03 Online:2014-03-04
  • Contact: LIU Li-li E-mail:flily_51@yahoo.com.cn

Abstract: The theory of the blind-hole method used to measure surface residual stresses in plate was applied to measure surface residual stresses in forged barrel accurately. A kind of FEA software ABAQUS was used to calculate the relaxation coefficients of the blind-hole, and the applicable range of the blind-hole method to measure the surface residual stresses in forged barrel was confirmed by comparing the relaxation coefficients of the blind-hole in the plate and in the forged barrel under the same material, the same force and the same drilling condition. A new method to minimize the off-center error was proposed. The surface residual stresses in a forged barrel were measured by using this method.

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