Resumen

DE ABREU, Maricely  y  PERTUZ, Alberto. Finite element plane strain compression test (ford Test) estimation using flow stress data from tension test. Rev. Fac. Ing. UCV [online]. 2014, vol.29, n.2, pp.79-92. ISSN 0798-4065.

The results of a plane strain compression test (PSCT) were estimated by mean of the finite element method (FEM) and data of stress flow experimentally obtained from a tension test. The geometric model employed in ABAQUS^TM was validated by comparing load-thickness reduction computational curves to experimental ones. Three different aluminum alloys were studied: 3003, 8011 and 6063. The two-dimensional FEM model is validated using a variable specimen width and a constant average friction coefficient, both in simulation as in the stress-strain material curves calculation. The computational results showed a 4-6% overestimation in terms of load at the beginning of plastic strain and a 2-3 % underestimation and the end of the PSCT. Moreover, the lower the spreading coefficient selected (parameter that takes into account the initial and final specimen´s width ratio), the smaller the effect of the use a specimen with constant average width, in the two-dimensional computation model. The application of hardening laws proposed by Hollomon, Voce and Sah allowed extrapolating the alloy’s tensile behavior and utilizing the stress-strain curves obtained under the FEM´s analyses, in order to estimate the results of PSCT. It was concluded that in all of the three alloys investigated, the Hollomon’s equation showed the best approximation to the load-thickness reduction PSCT experimental curves, however the values showed some discrepancies.

Palabras clave : Finite element method; Plane strain compression test; Work hardening laws; Aluminum alloys; BAQUS^TM.