Computational applications of a coupled plasticity-damage constitutive model for simulating plain concrete fracture

Al‐Rub, Rashid K. Abu; Kim, Sun-Myung

doi:10.1016/j.engfracmech.2010.04.007

Cited by 127 publications

(69 citation statements)

References 59 publications

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“…Interactions between damage and plastic hardening are rather difficult to consider and could be introduced into the plastic potential, as reported in [18,19,27]. The effect becomes more significant with increasing ductility of the material behavior.…”

Section: Thermodynamics Frameworkmentioning

confidence: 95%

“…This experimental observation implies that the elastic damage evolution can be described by the energy density release rate [17]. The potential function for the elastic damage is defined as [19]:…”

Section: Elastic Damage Evolutionmentioning

confidence: 99%

“…The kinetic evolution law of damage is derived with specified potential function within the thermodynamics framework based on the effective stress concept and the strain equivalence hypothesis or the strain energy equivalence hypothesis [16][17][18]. With the development of CDM, the damage variable is extended from scalar variable to tensor variable to describe the damage of material more generally due to the anisotropy of micro-defects [19][20][21]. The phenomenological CDM model is flexible for most complex damage and deformation mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Continuum damage mechanics for sintered powder metals

Yuan

Zhang³

2014

Sci. China Phys. Mech. Astron.

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Sintered metals are characterized by the high porosity ( 8%) and voids/micro-cracks in microns. Inelastic behavior of the materials is coupled with micro-crack propagation and coalescence of open voids. In the present work the damage evolution of the sintered iron under multi-axial monotonic loading conditions was investigated experimentally and computationally. The tests indicated that damage of the sintered iron initiated already at a stress level much lower than the macroscopic yield stress. The damage process can be divided into the stress-dominated elastic damage and the plastic damage described by the plastic strain. Based on the uniaxial tensile tests an elastic-plastic continuum damage model was developed which predicts both elastic damage and plastic damage in the sintered iron under general multi-axial monotonic loading conditions. Computational predictions agree with experiments with different multi-axial loading paths. A phenomenological continuum damage model for the sintered metal is developed based on the experimental observations to predict the inelastic behavior and damage process to failure under multi-axial loading conditions. The proposed damage model is experimentally verified under different loading conditions. sintered metal, porous material, damage evolution, multi-axial damage, continuum damage model PACS number(s): 46.35.+q, 46.50.+a, 81.20.Ev, 81.40.Lm Citation:Yuan H, Ma S Y, Zhang L. Continuum damage mechanics for sintered powder metals.

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Section: Thermodynamics Frameworkmentioning

confidence: 95%

Section: Elastic Damage Evolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Continuum damage mechanics for sintered powder metals

Yuan

Zhang³

2014

Sci. China Phys. Mech. Astron.

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“…Fig. 2 Stress-strain and damage-strain curves for M30 grade of concrete [2,4,5] concrete in compression and tension, respectively [2]. The strain rate dependent strength properties of concrete and the dynamic increment factor (DIF) under compressive and tensile loading are obtained from Bischoff and Perry [3].…”

Section: Types Of Analysesmentioning

confidence: 99%

Dynamic Analysis of Twin Tunnel Subjected to Internal Blast Loading

Tiwari

Chakraborty

Matsagar

2014

Advances in Structural Engineering

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The present study deals with three dimensional nonlinear finite element analyses of underground twin tunnels in soil with reinforced concrete (RC) lining subjected to internal blast loading for blast occurring in one tunnel. The blast load has been simulated using coupled Eulerian-Lagrangian (CEL) analysis tool available in finite element software Abaqus/Explicit. Soil mass and RC lining have been modeled using three dimensional eight node reduced integration Lagrangian elements (C3D8R). Beam elements (B31) have been used to model reinforcement of RC lining. A 50 kg TNT charge weight has been used in the analysis. Eight node reduced integration Eulerian elements (EC3D8R) have been used to model the TNT explosive and the surrounding air. Drucker-Prager plasticity model available in Abaqus has been used to simulate strain rate dependent behavior of soil mass. For simulating strain rate dependent behavior of concrete and steel, concrete damaged plasticity and Johnson-Cook plasticity models, available in Abaqus, have been used, respectively. The explosive (TNT) has been modeled using JWL equation-ofstate. Investigations have been performed for studying the deformation of RC lining and surrounding soil mass. Pressure in the RC lining and surrounding soil mass, caused by explosive induced shock wave have also been studied for both tunnels. It is observed that deformation in tunnel away from blast decreases with increasing soil cover in between two tunnels.

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“…These models seek to degrade material stiffness based on the presence and perhaps growth of subscale (not explicitly resolved) imperfections such as voids and cracks (Graham-Brady 2010). These models may be used to predict fracture patterns by associating fracture with areas of extensive damage, which suggests coalescence of the subscale imperfections into a discrete crack (Abu et al 2010). While physically based, fracture is generally modeled as an inelastic strain and as such these models are more closely related to continuum plasticity models.…”

Section: Introductionmentioning

confidence: 98%

Simulation of dynamic fracture with the Material Point Method using a mixed J-integral and cohesive law approach

Bardenhagen

Nairn

2011

Int J Fract

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A new approach to simulating fracture, in which toughness is partitioned between the crack tip and, optionally, a process zone, is applied to dynamic fracture processes. In this approach, classical fracture mechanics determines crack tip propagation, and cohesive laws characterize process zone response and determine crack root and process zone propagation. The approach is implemented in the Material Point Method, a particle method in which the fracture path is unconstrained by a body-fitted mesh. The approach is found suitable for modeling a range of dynamic fracture processes, from brittle fracture to fracture with crack bridging. A variety of ways of partitioning toughness are explored with the aim of distinguishing model parameters via experimental measurements, particularly R curves. While no unique relationship exists, R curves, or effective R curves, on a suite of materials would provide substantial insight into model parameters. Advantages to the approach are identified, both in S. G. versatility and in regards to practical matters associated with implementing numerical fracture algorithms. It is found to perform well in dynamic fracture scenarios.

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Computational applications of a coupled plasticity-damage constitutive model for simulating plain concrete fracture

Cited by 127 publications

References 59 publications

Continuum damage mechanics for sintered powder metals

Continuum damage mechanics for sintered powder metals

Dynamic Analysis of Twin Tunnel Subjected to Internal Blast Loading

Simulation of dynamic fracture with the Material Point Method using a mixed J-integral and cohesive law approach

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