Simulation analysis of features of overhanging structure fabricated by selective laser melting

被引：0

作者：

Lin H. ^{[1
]}

Shen L. ^{[1
]}

Jiang J. ^{[2
]}

Xie D. ^{[1
]}

Liang H. ^{[1
]}

Fan Q. ^{[3
]}

机构：

[1] College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing

[2] College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing

[3] Nanjing Zhongke Raycham Laser Technology Co., Ltd., Nanjing

来源：

Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2018年 / 39卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Overhanging structure; Selective laser melting; Simulation analysis; Temperature field; Warping deformation;

D O I：

10.7527/S1000-6893.2018.21897

中图分类号：

学科分类号：

摘要：

The temperature field and stress field of the overhanging structure fabricated by selective laser melting are simulated. Finite element analysis software is used to establish a three-dimensional transient model for the structure. The influence of laser power and scanning speed on the forming quality of the structure is analyzed numerically and validated experimentally. The results show that in the forming process of the structure, the temperature of the molten pool located at the overhanging position is obviously higher than that located at the central position when laser scanning these position. The maximum residual stress occurs at the coincident crossover points of the layer scan region and the substrate. Obvious deformation occurs at the position of the overhanging structure. When the ratio of laser power to sweep velocity is constant, the greater the laser power is, the larger deformation the overhanging structure has. © 2018, Press of Chinese Journal of Aeronautics. All right reserved.

引用

共 22 条

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