Application of the Finite Element Method to the Incremental Forming of Polymer Sheets: The Thermomechanical Coupled Model and Experimental Validations

Polymers

R. Dorado-Vicente¹  Gustavo Medina-Sanchez¹  A. García-Collado¹  Munish Kumar Gupta² 

[1] Department of Mechanical and Mining Engineering, University of Jaén, EPS de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain;Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China;

关键词: parallel rheological framework;    Finite Element Method (FEM);    incremental forming;    thermoplastic;   

DOI  :  10.3390/polym12081715

来源: DOAJ

【 摘 要 】

Single Point Incremental Forming (SPIF) is an innovative die-less low-cost forming method. Until now, there have not been viable numerical solutions regarding computational time and accuracy for the incremental forming of polymers. Unlike other numerical approaches, this novel work describes a coupled thermomechanical finite element model that simulates the SPIF of polymer sheets, where a simple elastoplastic constitutive equation rules the mechanical behavior. The resulting simulation attains a commitment between time and accuracy in the prediction of forming forces, generated and transmitted heat, as well as final part dimensions. An experimental test with default process parameters was used to determine an adequate numerical configuration (element type, mesh resolution, and material model). Finally, compared to a set of experimental tests with different thermoplastics, the proposed model, which does not consider complex rheological material models, shows a good agreement with an approximation error of less than 11% in the vertical forming force prediction.

【 授权许可】

Unknown