FEM-DEM Coupling Analysis and Experimental Research on Soft Forming of Parabolic Shell

doi:10.3901/JME.2020.20.038

Abstract

Abstract: In order to solve the forming difficulties of the thin-wall parts with complex shapes and local characteristics, the solid granular medium forming (SGMF) technology is proposed. The thin-wall parts of parabolic shell are taken as an example to analyze the characteristics and the points of forming difficulties. Based on the ABAQUS software, the SGMF forming process of the parabolic shell is analyzed by using the finite element method (FEM) and discrete element method (DEM) coupling by self-programming, and the influence of different friction factors on SGMF are investigated. The results show that the FEM-DEM coupling analysis technology have deformation characteristics with the discrete of granular medium and continuum sheet respectively, which can simulate the sheet forming process of the SMGF more accurately, and the optimum technological parameters of the parabolic shell parts are identified. Finally, based on the numerical results, the solid granules medium forming experiments of parabolic shell parts are carried out, the qualified parts are successfully produced, and the experiment results are in good agreement with the simulation of FEM-DEM model.

Key words: thin-wall parts, solid granules medium forming, simulation, FEM-DEM

CLC Number:

TG386

CAO Miaoyan, HU Han, TIAN Shaojie, DU Bing, ZHAO Changcai. FEM-DEM Coupling Analysis and Experimental Research on Soft Forming of Parabolic Shell[J]. Journal of Mechanical Engineering, 2020, 56(20): 38-46.

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