Volume 14, Issue 10 (1-2015)                   Modares Mechanical Engineering 2015, 14(10): 121-128 | Back to browse issues page

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Souri A, shahbeyk S. Numerical Implementation and Calibration of Microplane Model for Closed-Cell Metal Foams with Spherical Cellular Structure. Modares Mechanical Engineering 2015; 14 (10) :121-128
URL: http://mme.modares.ac.ir/article-15-7152-en.html
1- Assistant Professor of Structural Eng. / Faculty of Civil and Enviromental Eng., Tarbiat Modares University
Abstract:   (4866 Views)
Metal foams as a new class of materials with interesting properties such as high stiffness and strength to density ratios, capacity to absorb impact energy, and reproducibility, are rapidly growing their share in engineering applications such as aerospace, automotive industry, lightweight structures, and energy absorbers. Different numerical approaches have been already developed for the simulation of this class of materials from which the two-scale microplane model has been focused in this research. First a simple algorithm has been proposed for the numerical implementation of microplane model to simulate the mechanical behavior of closed-cell metal foams. The structure of foam is assumed to be an assembly of firmly bonded spherical shells. Next, in order to calibrate the microplane model, the mesostructure of foam has been simulated using non-linear finite element model. The FE model has been subjected to both uniaxial and hydrostatical loads and required steps for the extraction of model parameters from the results have been outlined. Finally, the results of microplane model and mesomodel have been compared for a more general biaxial loading condition. Despite tremendous reduction of computational cost, good agreement has been achieved.
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Article Type: Research Article | Subject: Elasticity & Plasticity|Stress Analysis|Finite Elements Method
Received: 2014/01/23 | Accepted: 2014/04/15 | Published: 2014/09/27

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