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

Title
On the Non-linear Elasto-Plastic Behavior of AA6061-T6: Experimental and Numerical Implementations
Type
Article in International Conference Proceedings Book
Year
2017-01-01
Authors
B.V. Farahani
(Author)
Other
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P.J. Tavares
(Author)
Other
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P.M.G.P. Moreira
(Author)
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Conference proceedings International
Pages: 468-475
2nd International Conference on Structural Integrity (ICSI)
Funchal, PORTUGAL, SEP 04-07, 2017
Other information
Authenticus ID: P-00N-FSN
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
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