On the Non-linear Elasto-Plastic Behavior of AA6061-T6: Experimental and Numerical Implementations

• Type: Article in International Conference Proceedings Book
• Date: 2017-01-01

Authors

B.V. Farahani (Author) Other; P.J. Tavares (Author) Other; P.M.G.P. Moreira (Author) Other; Jorge Belinha (Author) FEUP

Conference proceedings International

Title: 2ND INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY, ICSI 2017

Pages: 468-475

2nd International Conference on Structural Integrity (ICSI)

Funchal, PORTUGAL, SEP 04-07, 2017

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 9 Citations

Other information

Authenticus ID: P-00N-FSN

DOI: 10.1016/j.prostr.2017.07.145

Abstract (EN): In this study, using an elasto-plastic constitutive model, the structural response of an Aluminium alloy AA6061-T6 bi-failure specimen is investigated. The mechanical specifications and material model are fully defined. It is intended to evaluate the force variation versus the displacement field during a tensile loading test. Digital Image Correlation (DIC) approach is used to acquire the experimental data. Afterwards, a 2D model is analysed through Finite Element (FE) formulation considering an isotropic elasto-plastic regime and the obtained results are compared to DIC outcome. A reasonable agreement between numerical and experimental results was found. Additionally, the problem is numerically solved using the Natural Neighbour Radial Point Interpolation Meshless method (NNRPIM) formulation assuming an elasto-plastic behaviour for the material. An elasto-plastic return-mapping routine is defined based on von-Mises yield criteria to evaluate the stress tensor in a pseudo-time stepping scheme, which imposes displacements. Taking into account the non-linear system of equations, a non-linear Newton-Raphson algorithm is used to obtain the converged solution. The NNRPIM results have a reasonable agreement compared to the DIC solution. The obtained results imply that the proposed elasto-plastic NNRPIM procedure is feasible and robust. (C) 2017 The Authors. Published by Elsevier B.V.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8