Encontrados 15 documentos, a visualizar página 1 de 2
A Ductile Damage Nonlocal Model of Integral-type at Finite Strains: Formulation...
F.X.C. Andrade; J. M. A. César de Sá; F.M. Andrade Pires
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...
Evaluation of ductile fracture in sheet metal forming using a damage model
Pedro Teixeira; Abel D. Santos; J. M. A. César de Sá; Francisco M. A. PiresContinuous Damage Mechanics (CDM) may constitute an alternative to the traditional use of Forming Limit Diagrams (FLDs) to predict the onset of formability in sheet metal forming [1]. In CDM, at the constitutive level, a damage variable is introduced to model, at the macro scale, the internal material degradation due to micro-defects that occur during plastic loading. This approach is used in this work and the ...
Evaluation of ductile fracture in sheet metal forming using a damage model
J. M. A. César de Sá; Abel D. Santos; Francisco M. A. Pires; Pedro TeixeiraContinuous Damage Mechanics (CDM) may constitute an alternative to the traditional use of Forming Limit Diagrams (FLDs) to predict the onset of formability in sheet metal forming [1]. In CDM, at the constitutive level, a damage variable is introduced to model, at the macro scale, the internal material degradation due to micro-defects that occur during plastic loading. This approach is used in this work and the ...
A comparison of models for ductile fracture prediction in forging processes
Cai Zheng; J. M. A. César de Sá; F. M. Andrade Pires
A comparison of meshless and finite element approaches to ductile damage in for...
J.M.A. Cesar de Sa; C. Zheng
Finite element prediction of ductile fracture in sheet metal forming processes
Pedro Teixeira; A. D. Santos; F. M. Andrade Pires; J. M. A. César de Sá
Damage modelling in metal forming problems using an implicit non-local gradient...
J.M.A. César de Sá; P.M.A. Areias; Cai Zheng
Strong displacements discontinuities and Lagrange multipliers: finite displacem...
P.M.A. Areias; J.M.A. César de Sá; C.A. Conceição António
Enhanced transverse shear strain shell formulation applied to large elasto-plas...
R.A. Fontes Valente; M.P.L. Parente; R.M. Natal Jorge; J.M.A. César de Sá; J.J.A. Grácio
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