| #$NPYANG Jun-ru,XU Hao,WANG Gui-jie,ZHU Ran,DENG Da-xiang,WU Qing-yuan.Application of Python-based Abaqus Redevelopment in Laser Shock Peening of Superalloy GH3039[J],52(7):435-443 |
| Application of Python-based Abaqus Redevelopment in Laser Shock Peening of Superalloy GH3039 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.07.040 |
| KeyWord:redevelopment of Abaqus Python laser shock peening residual compressive stress spot diameter laser energy impact times |
| Author | Institution |
| #$NPYANG Jun-ru |
Shandong University of Science and Technology, Shandong Qingdao , China |
| XU Hao |
Shandong University of Science and Technology, Shandong Qingdao , China |
| WANG Gui-jie |
Shandong University of Science and Technology, Shandong Qingdao , China |
| ZHU Ran |
Shandong University of Science and Technology, Shandong Qingdao , China;Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology & Equipment of Zhejiang Province, Zhejiang Jinhua , China |
| DENG Da-xiang |
Harbin Institute of Technology Shenzhen, Guangdong Shenzhen , China |
| WU Qing-yuan |
Guangdong University of Technology, Guangzhou , China |
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| Abstract: |
| In the simulation process of laser shock peening of superalloy GH3039 with different laser process parameters, one or several laser parameters need to be frequently changed for repeated modeling, which reduces the efficiency of simulation. The method of redevelopment of Abaqus with Python script can realize the parametric modeling of simulation process and significantly improve the efficiency of simulation analysis. With superalloy GH3039 as the research object, a simulation plug-in for laser shock peening of superalloy GH3039 was established by Python language, and the correctness of the plug-in results was verified by experiments. Through the comparison between the experimental results and the simulation data, it was known that the plug-in simulation results had high accuracy. Based on this plug-in, the distribution of residual stress in superalloy GH3039 with different laser process parameters was studied, and the distribution of residual stress in surface direction and depth direction of superalloy GH3039 with different laser spot sizes, laser energy and laser impact times was analyzed. The spot size had a greater effect on the distribution law of residual stress in the surface direction. Compared with the maximum residual stress under the spot diameter of 4 mm and 2 mm, the maximum residual stress under the spot diameter of 6 mm increased by 4.3% and 53% respectively. With the increase of the spot size, the residual compressive stress in the surface direction increased and the variation gradient decreased, and the residual compressive stress in the depth direction increased. This was because the large spot transmitted the shock wave in the form of plane wave and small spot transmitted shock wave in the form of spherical wave, while plane wave attenuated slowly when transmitting laser energy. With the increase of energy, the peak value of laser shock wave pressure changed. On the premise that other process parameters remained unchanged, the superalloy GH3039 was subject to laser shock peening with 6 J, 7 J and 8 J laser energy respectively, and the peak pressure was 2.3 GPa, 2.5 GPa and 2.68 GPa respectively. The average value of residual compressive stress in the impact area increased with the increase of laser energy, and the fluctuation gradient of residual compressive stress increased. The peak value of residual compressive stress was near the central region. This was because the surface wave of the circular spot converged to the center of the laser impact area, causing local reverse plastic strain and reducing the residual compressive stress level. The average depth of the plastic layer subject to 6 J, 7 J and 8 J laser energy was 0.55 mm, 0.67 mm and 0.82 mm, and the depth of the plastic layer increased. The samples were impacted once, twice and three times at the same position respectively. The average value of residual compressive stress in the surface direction of multiple impact peening was higher than that of single impact peening, but the difference was small between the average value of residual compressive stress in the second impact and the third impact. This was because the material was hardened after laser impact peening. With the increase of impact times, the degree of hardening and the fluctuation gradient of residual compressive stress both became larger. With the increase of impact times, the residual compressive stress increased. The average depth of plastic layer impacted once, twice and three times was 0.55 mm, 0.71 mm and 0.85 mm. Multiple impacts can increase the depth of plastic layer. |
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