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Eliminating plasticity effects in the measurement of residual stress by using the hole-drilling method

  • Ying Gu

    Prof. Ying Gu, born in 1986, is a Member of the School of Civil Engineering and Architecture, Southwest University of Science and Technology in Mianyang, China. He also serves as a part-time researcher at the Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province in Mianyang, China. He received his Ph.D. in Bridge and Tunnel Engineering, Southwest Jiaotong University, Chengdu, China, in 2016. His research scope is related to welding residual stress and its influence on structural performance.

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    , Songbo Ren

    Dr. Songbo Ren, born in 1985, is a Lecturer at the School of Civil Engineering and Architecture, Southwest University of Science and Technology in Mianyang, China. He received his Ph.D. in Structural Engineering at the Xi’an University of Architecture and Technology, Xi’an, China, in 2016. His research scope is related to mechanical properties and fracture of materials.

    , Chao Kong

    Dr. Chao Kong, born in 1988, is a Lecturer at the School of Civil Engineering and Architecture, Southwest University of Science and Technology in Mianyang, China. He received his Ph.D. in Bridge and Tunnel Engineering at the Southwest Jiaotong University, Chengdu, China, in 2016. His research focuses on mechanic behavior of large and adjacent urban tunnel groups.

    and Song Gu

    Prof. Song Gu, born in 1976, works at the School of Civil Engineering and Architecture, Southwest University of Science and Technology in Mianyang, China. He received his Ph.D. in Bridge and Tunnel Engineering at the Southwest Jiaotong University, Chengdu, China, in 2016. His areas of expertise include testing technique of welding residual stress, bridge design theory and construction control.

From the journal Materials Testing

Abstract

When the hole-drilling method is used to measure residual stress, plasticity effects occur if the residual stress exceeds 60 % of the yield stress. Plasticity effects result in an overestimation of the residual stress as the hole-drilling method is based on the linear elastic behavior of materials. To overcome this problem, a simplified iterative method based on an existing iterative method and using the optimizer tools of the ANSYS program is proposed in this paper. The proposed method is verified through numerical and experimental studies. The numerical case study reveals that, for the case studied, the proposed method can achieve the same accuracy as the original iterative method and has a higher convergence ability. The experimental study demonstrates that the values of the maximum principal stress calculated using the American Society of Testing Materials standard is generally greater than the true values and that the error magnitude increases with an increase in stress levels. Using the proposed method, errors are reduced for the maximum principal stress while increasing slightly for the minimum principal stress. The proposed method has a high convergence ability; for the case studied, only two or three iterations are needed to achieve acceptable accuracy.


Prof. Ying Gu Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province School of Civil Engineering and Architecture Southwest University of Science and Technology Mianyang 621010, P. R. China

About the authors

Prof. Ying Gu

Prof. Ying Gu, born in 1986, is a Member of the School of Civil Engineering and Architecture, Southwest University of Science and Technology in Mianyang, China. He also serves as a part-time researcher at the Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province in Mianyang, China. He received his Ph.D. in Bridge and Tunnel Engineering, Southwest Jiaotong University, Chengdu, China, in 2016. His research scope is related to welding residual stress and its influence on structural performance.

Dr. Songbo Ren

Dr. Songbo Ren, born in 1985, is a Lecturer at the School of Civil Engineering and Architecture, Southwest University of Science and Technology in Mianyang, China. He received his Ph.D. in Structural Engineering at the Xi’an University of Architecture and Technology, Xi’an, China, in 2016. His research scope is related to mechanical properties and fracture of materials.

Dr. Chao Kong

Dr. Chao Kong, born in 1988, is a Lecturer at the School of Civil Engineering and Architecture, Southwest University of Science and Technology in Mianyang, China. He received his Ph.D. in Bridge and Tunnel Engineering at the Southwest Jiaotong University, Chengdu, China, in 2016. His research focuses on mechanic behavior of large and adjacent urban tunnel groups.

Prof. Song Gu

Prof. Song Gu, born in 1976, works at the School of Civil Engineering and Architecture, Southwest University of Science and Technology in Mianyang, China. He received his Ph.D. in Bridge and Tunnel Engineering at the Southwest Jiaotong University, Chengdu, China, in 2016. His areas of expertise include testing technique of welding residual stress, bridge design theory and construction control.

Acknowledgement

The authors gratefully acknowledge the support provided by the National Natural Science Foundation of China (Grant No. 51708467) and the Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province (Grant No. 18kfgk13).

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Published Online: 2021-03-31

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