Corrigendum to ```On the use of constrained reactive mixtures of solids to model finite deformation isothermal elastoplasticity and elastoplastic damage mechanics' [Journal of the Mechanics and Physics of Solids 155 (2021) 104534]''

New damage mechanics method is proposed to predict the low-cycle fatigue life of metallic structures under multiaxial loading. The microstructure mechanical model is proposed to simulate anisotropic elastoplastic damage evolution. As the micromodel depends on few material parameters, the present method is very concise and suitable for engineering application. The material parameters in damage evolution equation are determined by fatigue experimental data of standard specimens. By employing further development on the ANSYS platform, the anisotropic elastoplastic damage mechanics-finite element method is developed. The fatigue crack propagation life of satellite structure is predicted using the present method and the computational results comply with the experimental data very well.

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A Coupled Elastoplastic Damage Dynamic Model for Rock

Shock and Vibration ◽

10.1155/2021/5567019 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Xuelong Hu ◽

Ming Zhang ◽

Xiangyang Zhang ◽

Min Tu ◽

Zhiqiang Yin ◽

...

Keyword(s):

Plastic Strain ◽

Constitutive Model ◽

Damage Mechanics ◽

Yield Criterion ◽

Triaxial Compression ◽

Equivalent Plastic Strain ◽

Damage Variable ◽

Uniaxial Tensile ◽

Uniaxial Tensile Test ◽

Elastoplastic Damage

Rock dynamic constitutive model plays an important role in understanding dynamic response and addressing rock dynamic problems. Based on elastoplastic mechanics and damage mechanics, a dynamic constitutive model of rock coupled with elastoplastic damage is established. In this model, unified strength theory is taken as the yield criterion; to reflect the different damage evolution law of rocks under tension and pressure conditions, the effective plastic strain and volumetric plastic strain are used to represent the compressive damage variable and the equivalent plastic strain is used to represent the tensile damage variable; the plastic hardening behavior and strain rate effect of rocks are characterized by piecewise function and dynamic increase factor function, respectively; Fortran language and LS-DYNA User-Defined Interface (Umat) are used to numerically implement the constitutive model; the constitutive model is verified by three classical examples of rock uniaxial and triaxial compression tests, rock uniaxial tensile test, and rock ballistic test. The results show that the constitutive model can describe the dynamic and static mechanical behavior of rock comprehensively.

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3D Anisotropic Elastoplastic-Damage Model and its Application in Simulating the Behavior of Rock Materials

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.324-325.579 ◽

2006 ◽

Vol 324-325 ◽

pp. 579-582

Author(s):

Jun Feng Zhang ◽

Tao Qi

Keyword(s):

Damage Evolution ◽

Damage Mechanics ◽

Rock Sample ◽

Progressive Failure ◽

Failure Process ◽

Damage Model ◽

Tensor Decomposition ◽

Continuum Damage Mechanics ◽

Proposed Model ◽

Elastoplastic Damage

A 3D anisotropic elastoplastic-damage model was presented based on continuum damage mechanics theory. In this model, the tensor decomposition technique is employed. Combined with the plastic yield rule and damage evolution, the stress tensor in incremental format is obtained. The derivate eigenmodes in the proposed model are assumed to be related with the uniaxial behavior of the rock material. Each eigenmode has a corresponding damage variable due to the fact that damage is a function of the magnitude of the eigenstrain. Within an eigenmodes, different damage evolution can be used for tensile and compressive loadings. This model was also developed into finite element code in explicit format, and the code was integrated into the well-known computational environment ABAQUS using the ABAQUS/Explicit Solver. Numerical simulation of an uniaxial compressive test for a rock sample is used to examine the performance of the proposed model, and the progressive failure process of the rock sample is unveiled.

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Study on the Elastoplastic Damage-Healing Coupled Constitutive Model of Mudstone

Mathematical Problems in Engineering ◽

10.1155/2017/6431607 ◽

2017 ◽

Vol 2017 ◽

pp. 1-7

Author(s):

Jie Xu ◽

Jiawang Qu ◽

Yufeng Gao ◽

Ning Xu

Keyword(s):

Mechanical Properties ◽

Damage Mechanics ◽

Chemical Interaction ◽

Triaxial Compression ◽

Healing Process ◽

Great Influence ◽

Radioactive Nuclide ◽

Self Healing ◽

Damage Healing ◽

Elastoplastic Damage

Under the effect of high ground stress and water-rock chemical interaction, the fractures in the damaged mudstone wound undergo a self-healing process and recover the physical and mechanical properties, which has a significant impact on the wall-rock’s stability of high level radioactive waste repository and the migration of radioactive nuclide. According to the general thermodynamics and continuum damage mechanics, an internal variable describing mudstone healing properties is introduced and an elastoplastic damage-healing model reflecting mudstone deformation, damage, and self-healing evolution is put forward. This model is used to simulate the triaxial compression test of mudstone under different confining pressures, whose simulated results are compared with the test data. It is indicated that the model could embody the main mechanical properties of mudstone with the healing effect in an effective way, and the healing part of the model has a great influence on the simulated results.

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