Coupled thermo–mechanical interface model for concrete failure analysis under high temperature

Caggiano, António; Etse, Guillermo

doi:10.1016/j.cma.2015.02.016

Cited by 50 publications

(20 citation statements)

References 38 publications

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“…The proposed models were used to analyse damage in different kinds of physical phenomenons , e.g. interface decohesion (Tvergaard and Hutchinson 1993), delamination (Geubelle and Baylor 1998;Pantano and Averill 2004;Turon et al 2007;Nguyen and NguyenXuan 2013), debonding (Needleman 1987;Tvergaard 1990;Inglis et al 2007), crack path in composites Wu et al 2013;Cid Alfaro et al 2010), etc, and have been implemented in different mathematical approaches like interface elements (Cerrone et al 2014;Caggiano and Etse 2015), embedded-extended discontinuities (Unger et al 2007;Linder et al 2011), phase-field approaches (Verhoosel and de Borst 2013), mesh free methods (Rabczuk and Samaniego 2008) and isogeometric analysis (Corbett and Sauer 2015), among others. The use of interface elements has been widely extended due to its versatility to reproduce complex crack path, crack nucleation, crack branching and fragmentation, either in homogeneous or composites materials.…”

Section: Introductionmentioning

confidence: 99%

Meso-scale fracture simulation using an augmented Lagrangian approach

Labanda

Giusti

Luccioni

2016

International Journal of Damage Mechanics

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A cohesive zone model implemented in an augmented Lagrangian functional is used for simulation of meso-scale fracture problems in this paper. The method originally developed by Lorentz is first presented in a rigorous variational framework. The equivalence between the stationary point of the one field problem and the saddle point of mixed formulation is proved by solving the double inequality of the mixed functional. An adaptation to simulate fracture phenomenon in the meso-scale via mesh modification is also presented as an algorithm to insert zero-thickness interface elements based on Lagrange multipliers, boarding the non-trivial task of the field interpolation for different crack paths (plain and tortuous). A suitable tool to study the matrix fracture and debonding phenomena in composites with strongly different component stiffnesses that avoids ill-conditioning matrices associated with intrinsic cohesive zone models is obtained. The method stability is discussed using a simple patch test. Some numerical applications to fracture problems taking into account the meso-structure and, particularly, the study of transverse failure of longitudinal fiber reinforced epoxy and the fracture in concrete specimens are included in the paper. Comparing the numerical results with the experimental results obtained by other researchers, the paper introduces a discussion about the influence of coarse-aggregate volume in meso-scale fracture mechanism in concrete L-shape specimens.

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Section: Introductionmentioning

confidence: 99%

Meso-scale fracture simulation using an augmented Lagrangian approach

Labanda

Giusti

Luccioni

2016

International Journal of Damage Mechanics

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“…The basic constitutive equations of the proposed elasto-thermo-poroplastic interface model are the following [29]:…”

Section: Coupled Thermo-poro-plastic Discontinuous Modelmentioning

confidence: 99%

“…The rate of normal and tangential interface effective stresses can be derived through the rates of relative displacement vector and temperature rise as: The complete formulation of the elastothermo-plastic rate equations which can be derived from the description of the thermal and plastic interface displacements, the formulation of a temperature dependent yield criterion, the adoption of temperature and fracture-energy dependent evolution laws are omitted in this work for the sake of brevity. A detailed formulation was published by the authors in [29].…”

Section: Coupled Thermo-poro-plastic Discontinuous Modelmentioning

confidence: 99%

Discontinuos Approach for Meso-Scale Modeling of Porous Materials Like Concrete Under High Temperatures

Etse¹,

Schicchi²,

Caggiano³

et al. 2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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In this work, the failure behavior of concrete exposed to elevated temperatures is analyzed. A thermo-mechanical and poropressure-based interface model for failure analysis of concrete subjected to high temperature is presented. The model represents an extension of a fracture energy-based interface formulation to account for the damage induced by high temperatures and for the temperature dependent pore pressure and humidity in concrete. Thereby, the non-linear response of the proposed coupled thermo-mechanical interface model for porous materials like concrete is activated under kinematic and/or temperature and/or hydraulic increments (with or without jumps). A simplified procedure is proposed to account for the temperature dependent pore pressure in concrete. This contribution focuses on both the formulation of the novel interface constitutive theory and on the strategy proposed for mesoscopic finite element analysis of concrete failure behavior under different hydro-thermo-mechanical conditions. Finally, some numerical analysis are presented which demonstrated the predictive capabilities of the proposed interface model.

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“…(4) expands into while the tangential elastic-damage-plastic operator of Eq. (6) can be written as being H the so-called softening parameter [20].…”

Section: Isotropic Damage Formulationmentioning

confidence: 99%

“…The post-peak response is controlled by fully independent fracture energy-based mechanisms for both mode I and II types of failure. Based on a previous proposal by the first and second authors [20], the interface constitutive model is now extended to account for the self-healing effects on concrete stiffness, strength and post-peak response behavior under all possible fracture modes. For this purpose a self-healing porosity parameter is formulated which governs the variation of concrete main mechanical features such as strength and stiffness through the softening and damage rule descriptions.…”

Section: Introductionmentioning

confidence: 99%

Zero-thickness interface constitutive theory for concrete self-healing effects

Caggiano

Etse

Ferrara

et al. 2017

Computers & Structures

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A damage-plasticity constitutive theory for zero-thickness interfaces is presented aimed at predicting time-dependent self-healing phenomena in concrete. The material model is based on fracture-energy concepts and accounts for the time evolution of concrete porosity induced by the self-healing mechanism. The accuracy and soundness of the proposed interface model are demonstrated through comparative analyses of model predictions against experimental results on three point beam tests performed up to crack opening and then, up to complete failure, before and after been subjected to different exposure conditions, respectively. A wide range of experimental tests was considered in this work for both calibration and validation purposes of the proposed interface model.

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Coupled thermo–mechanical interface model for concrete failure analysis under high temperature

Cited by 50 publications

References 38 publications

Meso-scale fracture simulation using an augmented Lagrangian approach

Meso-scale fracture simulation using an augmented Lagrangian approach

Discontinuos Approach for Meso-Scale Modeling of Porous Materials Like Concrete Under High Temperatures

Zero-thickness interface constitutive theory for concrete self-healing effects

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