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Mesh objective continuum damage models for ductile fracture
International Journal for Numerical Methods in Engineering, 2015SummaryDuring machining processes, the work piece material is subjected to high deformation rates, increased temperature, large plastic deformations, damage evolution and fracture. In this context the Johnson‐Cook failure model is often used even though it exhibits pathological mesh size dependence.
Larsson, Ragnar +2 more
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Damage Model for Ductile Fracture
1986Large plastic strain in metals is accompanied by nucleation and growth of microvoids and microcracks. This phenomenon is called “ductile plastic damage”; it leads to plastic (“ductile”) fracture. This kind of fracture is considered, for example, in the book of McClintock and Argon [1], from the viewpoint of physics.
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Hysteretic effects of damage and stress on ductile fracture characterization
Engineering Fracture Mechanics, 1989Abstract A significant phenomenon known as hysteretic effect resulting from the damage evolution of material degradation upon loading observed in the stress analysis based on the theory of continuum damage mechanics is the structural response to the relative rotational change of principal stress and damage planes. No such observation is identified in
Wang June, C.L. Chow
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Microvoid Damage Model with Material Dilation for Ductile Fracture
Journal of Engineering Mechanics, 2006A constitutive model that incorporates material dilation and the concept of continuum damage mechanics is developed to predict ductile fracture of steel under monotonic quasi-static loading due to microvoids. In this model, damage is assumed to be isotropic and is a function of the state of stress and the plastic strain increment.
H. A. Khoo, T. M. Hrudey, J. J. R. Cheng
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A ductile fracture analysis using a local damage model
International Journal of Pressure Vessels and Piping, 2008Abstract In this study, the Gurson–Tvergaard–Needleman (GTN) model is used to investigate ductile tearing. The sensitivity of the model parameters has been examined from literature data. Three types of parameters have been reported: the “constitutive parameters” q 1 , q 2 and q 3 , the “initial material and nucleation parameters” and the ...
N. Benseddiq, A. Imad
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Damage evolution on dynamic tensile fracture of ductile metals
SCIENTIA SINICA Physica, Mechanica & Astronomica, 2017Dynamic tensile failure, e.g. spallation, of ductile metals is a complex phenomenon, due to its multiple tempo-spatial scales and structural levels involved on one hand, and due to its irreversible and nonlinear features as a non-equilibrium process on the other.
Hui PENG +6 more
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Continuum damage mechanics treatment of constraint in ductile fracture
Engineering Fracture Mechanics, 1995Abstract Detailed crack tip stress and strain fields are generated for different plane strain and plane stress fracture specimens. These fields are matched approximately by a tri-parameter characterization of (J, Q, k) in the microstructurally significant region for ductile fracture.
M.A. Fashang, Zhen-Bang Kuang
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An anisotropic theory of continuum damage mechanics for ductile fracture
Engineering Fracture Mechanics, 1987Abstract The development of an anisotropic theory of continuum damage mechanics for ductile fracture is described. A new anisotropic damage evolution equation and a constitutive equation of plasticity are formulated using a damage effect tensor M(D) proposed recently by the authors.
C.L. Chow, June Wang
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Quantitative description of damage evolution in ductile fracture of tantalum
Metallurgical and Materials Transactions A, 2000Dynamic ductile fracture has been studied through incipient spallation experiments on two grades of tantalum. A commercially pure Ta material incipiently spalled at 252 m/s, a highly pure Ta material incipiently spalled at 246 m/s, and a highly pure Ta material preshocked at 250 m/s and incipiently spalled at 246 m/s were used.
J. M. Rivas +4 more
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A ductile fracture model based on continuum thermodynamics and damage
Mechanics of Materials, 2019Abstract The paper presents an approach to ductile failure modeling derived based on continuum thermodynamics and damage. A continuum damage enhanced formulation of the effective material is used to describe the degradation of the response. From the thermo-mechanically motivated dissipation rate, a novel damage driving energy that involves both ...
Razanica S., Larsson R., Josefson B.L.
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