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Numerical Modelling of Magnesium Die-castings Using Stochastic Fracture Parameters by C. Dørum; O.S. Hopperstad; T. Berstad; D. Dispinar is a Engineering article available to read on EtoBox.

What is Numerical Modelling of Magnesium Die-castings Using Stochastic Fracture Parameters about?

Quasi-static material tests using specimens cut from a generic cast component are performed to study the behaviour of the high-pressure die-cast magnesium alloy AM60 under different stress states. The experimental data set is applied to establish a validated probabilistic methodology for finite element modelling of thin-walled die-castings subjected to quasi-static loading. The test specimens are modelled in the explicit finite element (FE) code LS-DYNA using shell elements. The cast magnesium alloy AM60 is modelled using an elasto-plastic constitutive model including a high-exponent, isotropic yield criterion, the associated flow law and isotropic hardening. To simulate fracture, the Cockcroft-Latham fracture criterion is adopted, and the fracture parameter is chosen to follow a modified weakest-link Weibull distribution. Comparison between the experimental and predicted behaviour of the cast magnesium specimens gives very promising results.

Who reads Numerical Modelling of Magnesium Die-castings Using Stochastic Fracture Parameters?

Author

C. Dørum; O.S. Hopperstad; T. Berstad; D. Dispinar

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0013-7944)

Published

2009

Language

EN

Field

Engineering (Physical Sciences)