Aspects on modeling the mechanical behavior of aluminum alloys with different heat treatments

Cerbu, Camelia and Teodorescu-Draghicescu, Horatio (2017) Aspects on modeling the mechanical behavior of aluminum alloys with different heat treatments. JOURNAL OF COMPUTATIONAL AND APPLIED MECHANICS, 12 (2). pp. 85-98. ISSN 1586-2070

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Abstract

Mechanical characteristics of two kinds of the EN AW–6060 aluminum alloys were measured in tensile and three-point bending tests. Although there is a standard [20] that indicates the mechanical properties of the aluminum alloys used to manufacture different kinds of profiles, the main purpose of this paper is to compare the accuracy of the mechanical properties of the commercial aluminum alloy EN AW–6060 used to manufacture box profiles in T4 or T6 heat treatment conditions. It is shown that the maximum values $\sigma_{\text{max}}$ of the tensile and flexural stresses -- these are denoted by $\sigma_{\max}$ -- are 41.55\% and 75.12\% greater for the EN AW–6060–T6 aluminum alloy than those for the EN AW–6060–T4 aluminum alloy. There are small differences concerning the modulus of elasticity $E$ recorded: 7.52\% for the case of Young’s modulus $E$ in the tensile test; 5.34\% for the modulus of elasticity in the three-point bending test. Both kinds of aluminum alloys have elastic-plastic behavior in tensile test. Theoretical concepts regarding the modeling of the nonlinear behavior of the elastic-plastic materials in the plastic range of the material are considered in order to simulate the behavior of the aluminum alloys in the tensile tests by using finite element analysis (FEA). Finally, we should remark that the $\left(\sigma-\varepsilon\right)$ stress-strain curves obtained in the numerical modeling match with those experimentally obtained for each aluminum alloy we have analyzed. Thus the input parameters for FEA (Young’s modulus $E$, the true stresses and strains belonging to the plastic range) for each type of aluminum alloy tested may be used in the case of any structural element made of such alloys.

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