DEM-FEA estimation of pores arrangement effect on the compressive Young's modulus for Mg foams
Por:
Pérez L., Lascano S., Aguilar C., Estay D., Messner U., Figueroa I.A., Alfonso I.
Publicada:
1 dic 2015
Resumen:
This work reports the study of the effect of the pore arrangement on the compressive behavior of Mg foams with regular pore size and porosities ranging from 25% to 45%. Pore arrangements were modeled using Finite Element Analysis (FEA), with random and ordered models, and compared to the estimations obtained for a previous work. The coordinates of the random pore arrangements were firstly generated using Discrete Element Method (DEM), and used in a second stage for modeling the pores by FEA. Estimations were also compared to the experimental results for Mg foams obtained by means of powder metallurgy. Results show important drops in the Young's moduli as the porosity increases for both, experimental results and FEA estimations. Estimations obtained using ordered pore arrangements presented significant differences when compared to the estimations acquired from models with random arrangements. The randomly arranged models represent more accurately the real topologies of the experimental metallic foams. The Young's moduli estimated using these models were in excellent agreement with the experiments, whilst the estimations obtained using ordered models presented relative errors significantly higher. The importance of the use of more realistic FEA models for improving the predicting ability of this method was probed, for the study of the mechanical properties of metallic foams. © 2015 Elsevier B.V.
Filiaciones:
Pérez L.:
Department of Mechanical Engineering, Advanced Center for Electrical and Electronic Engineering (Basal Project FB0008), Universidad Técnica Federico Santa María, Av. España 1680, Casilla 110-V, Valparaíso, Chile
Lascano S.:
Department of Mechanical Engineering, Universidad Técnica Federico Santa María, Av. España 1680, Casilla 110-V, Valparaíso, Chile
Aguilar C.:
Department of Metallurgical and Materials Engineering, Universidad Técnica Federico Santa María, Av. España 1680, Casilla 110-V, Valparaíso, Chile
Estay D.:
Department of Mechanical Engineering, Universidad Técnica Federico Santa María, Av. España 1680, Casilla 110-V, Valparaíso, Chile
Messner U.:
Department of Mechanical Engineering, University of Applied Sciences Offenburg, Badstraße 24, Offenburg, 77652, Germany
Figueroa I.A.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Alfonso I.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
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