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A Comparison of Shear Mechanisms for the Prediction of Ductile Failure under Lo...
F. J. P. Reis; L. Malcher; F. M. Andrade Pires; J. M. A. César de SáPurpose - The purpose of this paper is to perform a numerical assessment of two recently proposed extensions of the Gurson-Tveegard-Needleman ductile damage constitutive model under low stress triaxiality. Design/methodology/ approach - One of the most widely used ductile damage models is the so-called Gurson-Tveegard-Needleman model, commonly known as GTN model. The GTN model has embedded into its damage formu...
NUMERICAL INTEGRATION ALGORITHM OF A NEW MODEL FOR METAL PLASTICITY AND FRACTUR...
L. Malcher; F. M. Andrade Pires; César de Sá; F. X. C. AndradeThis paper describes an efficient numerical integration algorithm of a new model for metal plasticity and fracture [2]. The constitutive equations of the material model critically include both the effect of pressure through the triaxiality ratio and the effect of third deviatoric stress invariant through the lode angle in the description of material. The necessary steps required to implement the model within an...
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