Micromechanical Damage Model for Ductile Fracture Prediction of Anisotropic Sheet Metal


Nguyen Huu Hao and Vu Cong Hoa
Ho Chi Minh City University of Technology, VNU-HCM
Email: [email protected]; [email protected]
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This paper focus on implementation and applicable evaluation of an isotropic Gurson-Tvergaard-Needleman (GTN) type damage model, namely Dung model, for ductile fracture analysis of anisotropic sheet metal which its elastoplastic behavior is assumed to obey a non-quadratic anisotropic yield criterion. The anisotropic porous ductile material model is implemented via a user material subroutine using finite element codes of Abaqus/Explicit package. The material model is verified and applied to predict ductile damage of commercial aluminum alloy sheet AA5052-H32 via the uniaxial tensile tests under assumption of plane stress condition. All analysis results such as displacement – load responses, crack site and propagation which obtained from extended model are compared with those of the experimental data. The applicability of proposed material model to analyze ductile fracture of sheet metal is also discussed.

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Đánh giá:
Micromechanical Damage Model for Ductile Fracture Prediction of Anisotropic Sheet Metal Report description: This paper focus on implementation and applicable evaluation of an isotropic Gurson-Tvergaard-Needleman (GTN) type damage model, namely Dung model, for ductile fracture analysis of anisotropic sheet metal which its elastoplastic behavior is assumed to obey a non-quadratic anisotropic yield criterion. The anisotropic porous ductile material model is implemented via a user material subroutine using finite element codes of Abaqus/Explicit package. The material model is verified and applied to predict ductile damage of commercial aluminum alloy sheet AA5052-H32 via the uniaxial tensile tests under assumption of plane stress condition. All analysis results such as displacement – load responses, crack site and propagation which obtained from extended model are compared with those of the experimental data. The applicability of proposed material model to analyze ductile fracture of sheet metal is also discussed.


Micromechanical Damage Model for Ductile Fracture Prediction of Anisotropic Sheet Metal


This paper focus on implementation and applicable evaluation of an isotropic Gurson-Tvergaard-Needleman (GTN) type damage model, namely Dung model, for ductile fracture analysis of anisotropic sheet metal which its elastoplastic behavior is assumed to obey a non-quadratic anisotropic yield criterion. The anisotropic porous ductile material model is implemented via a user material subroutine using finite element codes of Abaqus/Explicit package. The material model is verified and applied to predict ductile damage of commercial aluminum alloy sheet AA5052-H32 via the uniaxial tensile tests under assumption of plane stress condition. All analysis results such as displacement – load responses, crack site and propagation which obtained from extended model are compared with those of the experimental data. The applicability of proposed material model to analyze ductile fracture of sheet metal is also discussed.
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