Anisotropic model of damage for geomaterials and concrete

Alliche, A.; Dumontet, Hélène

doi:10.1002/nag.933

Cited by 6 publications

(10 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… Axial loading can be ensured and stable post‐peak response can be obtained by a closed‐loop controlled electromechanical testing machine. Adaptive control and test setup are needed to obtain a complete post‐peak response. The metallic bar which provides extra stiffness in the modified tensile test and the closed‐loop controlled testing machine allows minimising the strain energy release from the testing system. The modified tensile test can be used to characterise several materials with brittle behaviour. We presently use the results in mechanical damage study [17]. …”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A Modified Tensile Test to Study the Behaviour of Cementitious Materials

Mallat

Alliche

2011

Strain

View full text Add to dashboard Cite

We investigate the tensile behaviour of two fibre reinforced repair mortars by two direct tensile testing configurations. In the first configuration, a ball-joint loading fixture is developed such that an ideal hinge boundary condition is guaranteed. This technique allows to access to mechanical properties of the material such as the modulus of elasticity and the failure stress. However, it does not allow studying the post-peak behaviour of the materials. A new post-peak tension test is adopted using a metallic bar within the fibre reinforced repair mortar hollow sample. Bar constitute a crack stabiliser by providing extra stiffness. It can minimise or eliminate the strain energy release from the testing machine, so that a stable post-peak response can be obtained. The test method uses a digitally controlled closed-loop testing electromechanical machine and three control channels: crosshead displacement and two extensometers mounted on the test sample. A complete stress-strain curve is obtained by this method if adaptive control and test setup are chosen appropriately.KEY WORDS: adaptive control, fibre reinforced mortar, post-peak tensile test, tensile test Ó

show abstract

Section: Discussionmentioning

confidence: 99%

“…The modified tensile test can be used to characterise several materials with brittle behaviour. We presently use the results in mechanical damage study [17].…”

Section: Discussionmentioning

confidence: 99%

A Modified Tensile Test to Study the Behaviour of Cementitious Materials

Mallat

Alliche

2011

Strain

View full text Add to dashboard Cite

show abstract

“…Many works are reported concerning damage in concrete and geomaterials (Yazdani and Schreyer, 1988;Ortiz, 1985;Alliche and Dumontet, 2011). The production of numerous macroscopic models is mainly imposed by the complexity and the variety of the observed behaviors (Pigeon, 1969;Chaboche, 1993;Rabier, 1989;Marigo, 1985).…”

Section: Introductionmentioning

confidence: 99%

“…More realistic damage model requires a tensorial formulation for a system of defects strongly influenced by the local field of stress. Some models take into account the unilateral effect (Badel et al, 2007;Halm and Dragon, 1998;Desmorat et al, 2007;Challamel et al, 2005;Alliche and Dumontet, 2011) and the dissymmetry between tension and compression.…”

Section: Introductionmentioning

confidence: 99%

A continuum anisotropic damage model with unilateral effect

Alliche¹

2016

Mech. Sci.

View full text Add to dashboard Cite

Abstract.A continuum damage mechanics model has been derived within the framework of irreversible thermodynamics with internal variables in order to describe the behaviour of quasi-brittle materials under various loading paths. The anisotropic character induced by the progressive material degradation is explicitly taken into account, and the Helmholtz free energy is a scalar function of the basic invariants of the second order strain and damage tensors. The elastic response varies depending on the closed or open configuration of defects. The constitutive laws derived within the framework of irreversible thermodynamics theory display a dissymmetry as well as unilateral effects under tensile and compressive loading conditions. This approach verifies continuity and uniqueness of the potential energy. An application to uniaxial tension-compression loading shows a good adequacy with experimental results when available, and realistic evolutions for computed stresses and strains otherwise.

show abstract

“…Ananiev and Ozbolt, 2004;Keller and Hutter, 2011;Skrzypek and Ganczarski, 1999) where a constitutive equation of the damaged material is built in the consideration of the intact material and damage effect that accounts the level of anisotropy induced within the material (Murakami and Ohno, 1981). In this article, an anisotropic damage model for concrete proposed by Alliche and Dumontet (2011) is presented. The model couples between the elasticity and damage in terms of macroscopic strain and damage tensors as well as a series of unknown parameters to be determined later.…”

Section: Introductionmentioning

confidence: 99%

Parameter estimation of an anisotropic damage model for concrete using genetic algorithms

Wardeh

Toutanji

2015

International Journal of Damage Mechanics

View full text Add to dashboard Cite

This article presents an anisotropic damage model for concrete that couples between elasticity and continuum damage mechanics. The formulation of constitutive model is based on the elastic strain energy in the framework of irreversible thermodynamics. The thermodynamic free energy is represented as a scalar function of elastic strain and damage tensors and used to derive the constitutive law and thermodynamic conjugate force of damage that is used to derive the dissipation potential. The damage evolution law is governed by the normality rule. The formulation of elastic strain energy of damaged material is capable of modeling the concrete anisotropic behavior under different loadings without decoupling the stress or damage release rate. A series of unknown parameters in the model formulation was used to control the constitutive behavior and damage surface. A Genetic algorithm FORTRAN subroutine is used to estimate these parameters based on the coupling between the constitutive and damage evolution equations. The performance of the damage model is verified with the experimental data from the literature. The model has shown a good agreement with the experimental results. It describes the anisotropy induced by the crack development within the concrete.

show abstract

Anisotropic model of damage for geomaterials and concrete

Cited by 6 publications

References 23 publications

A Modified Tensile Test to Study the Behaviour of Cementitious Materials

A Modified Tensile Test to Study the Behaviour of Cementitious Materials

A continuum anisotropic damage model with unilateral effect

Parameter estimation of an anisotropic damage model for concrete using genetic algorithms

Contact Info

Product

Resources

About