The Elasto-plastic Analysis of Polymers Subject to Traction and Compression Using Advanced Discretization Techniques

• Type: Article in International Conference Proceedings Book
• Date: 2019

Authors

D. E. S. Rodrigues (Author) Other; Jorge Belinha (Author) Other; Renato Natal Jorge (Author) FEUP; L. M. J. S. Dinis (Author) Other

Conference proceedings International

Title: MECHANICAL FATIGUE OF METALS: EXPERIMENTAL AND SIMULATION PERSPECTIVES

Pages: 401-406

19th International Colloquium on Mechanical Fatigue of Metals (ICMFM)

Univ Porto, Fac Engn, Porto, PORTUGAL, SEP 05-07, 2018

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Other information

Authenticus ID: P-00R-7D5

DOI: 10.1007/978-3-030-13980-3_51

Abstract (EN): Materials such as thermoplastics often have different behaviors when subjected to traction and compression. In those cases, yield criterions for nonlinear behavior need to be appropriately selected. In this work, a thermoplastic for a particular additive manufacturing process-the fused filament fabrication (FFF)-is investigated. Traction and compression tests are performed using two numerical tools and two variations of the Newton-Raphson method for the elasto-plastic incremental-iterative process. The stress-strain curves are compared with experimental data provided in the literature. The numerical tools used are the Finite Element Method (FEM) and the Radial Point Interpolation Method (RPIM), which is a meshless method [1]. In order to discretize the problem domain, meshless methods only require an unstructured nodal distribution. The numerical integration of the Galerkin weak form is performed using a background integration mesh and the nodal connectivity is enforced by the overlap of influence-domains defined in each integration point. In the end, a comparison study is performed between the results obtained using the meshless method and the finite element method.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6