A description of micro- and macroscale damage of concrete structures
TL;DR: In this paper, an isotropic elastic damage model is proposed by using the coupling of two damage variables, D t (tensile effects) and D c (compressive effects).
About: This article is published in Engineering Fracture Mechanics.The article was published on 1986-01-01. It has received 724 citations till now. The article focuses on the topics: Damage mechanics & Linear elasticity.
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TL;DR: This paper presents a review of the different models for concrete based on continuum damage theory, formulated at the Laboratoire de Mecanique et Technologie (Cachan, France), and the numerical implementations performed give a good description of the failure process as well as an accurate prediction of the behavior of concrete and reinforced concrete structures.
Abstract: This paper presents a review of the different models for concrete based on continuum damage theory, formulated at the Laboratoire de Mecanique et Technologie (Cachan, France). Derived in the framework of the thermodynamics of irreversible processes, each formulation is based on physical observation. Induced anisotropy, ductile behavior, and directional effects such as the closure of cracks are discussed and adequate damage models are proposed. Finally, the numerical implementations performed give a good description of the failure process as well as an accurate prediction of the behavior of concrete and reinforced concrete structures.
942 citations
TL;DR: In this article, the authors provide an overview of the existing quasi-static and dynamic phase-field fracture formulations from the physics and the mechanics communities, and propose and test the so-called hybrid formulation, which leads within a staggered implementation to an incrementally linear problem.
Abstract: In this contribution we address the issue of efficient finite element treatment for phase-field modeling of brittle fracture. We start by providing an overview of the existing quasi-static and dynamic phase-field fracture formulations from the physics and the mechanics communities. Within the formulations stemming from Griffith's theory, we focus on quasi-static models featuring a tension-compression split, which prevent cracking in compression and interpenetration of the crack faces upon closure, and on the staggered algorithmic implementation due to its proved robustness. In this paper, we establish an appropriate stopping criterion for the staggered scheme. Moreover, we propose and test the so-called hybrid formulation, which leads within a staggered implementation to an incrementally linear problem. This enables a significant reduction of computational cost--about one order of magnitude--with respect to the available (non-linear) models. The conceptual and structural similarities of the hybrid formulation to gradient-enhanced continuum damage mechanics are outlined as well. Several benchmark problems are solved, including one with own experimental verification.
880 citations
TL;DR: In this paper, three-dimensional geometrical models for concrete are generated taking the random structure of aggregates at the mesoscopic level into consideration, where the aggregate particles are generated from a certain aggregate size distribution and then placed into the concrete specimen in such a way that there is no intersection between the particles.
594 citations
TL;DR: In this paper, numerical analyses are performed to investigate the compressive behavior of concrete-like material at high strain rates using a homogeneous macro-scale model and a heterogeneous mesoscale model.
330 citations
TL;DR: In this article, an isotropic damage model for concrete is presented, where the main features of the model are: limited number of constitutive parameters required; independent modelling of tension and compression behaviour by means of two damage variables and two separate activation criteria (bi-dissipative model); independent definition of tension/compression fracture energies; consistent modelling of the unilateral effect upon transition from tension to compression; and the effectiveness of fracture energy based regularization strategy.
224 citations
References
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09 May 1984
TL;DR: In this paper, the authors propose the construction of a MICROSTRUCTURE and a COMPORTATION MECANIQUE DU BETON, who is a member of the International Organization for Standardization (IOS).
Abstract: CETTE ETUDE PROPOSE LA CONSTRUCTION D'UN MODELE DE COMPORTEMENT S'APPUYANT SUR LES PROPRIETES MICROSTRUCTURELLES DU MATERIAU ET PERMETTANT LA SIMULATION NUMERIQUE DE L'ENDOMMAGEMENT. TROIS PARTIES COMPOSENT CE TRAVAIL : 1 - MICROSTRUCTURE ET COMPORTEMENT MECANIQUE DU BETON : IL S'AGIT DE L'ETUDE DE LA FORMATION ET DE L'EVOLUTION DE LA MICROSTRUCTURE DANS LE TEMPS ET SOUS SOLLICITATIONS MECANIQUES. DES MODELES MICROSTRUCTURAUX AIDENT A APPREHENDER LES PRINCIPAUX PHENOMENES DE COMPORTEMENT ET APPORTENT DE NOMBREUX ENSEIGNEMENTS A LA FORMULATION D'HYPOTHESES UTILISEES DANS LA SUITE. - 2 - MODELE DE COMPORTEMENT MECANIQUE DU BETON : ETABLI DANS LE CADRE DE LA THERMODYNAMIQUE DES PROCESSUS IRREVERSIBLES, ON PASSE EN REVUE LES ACQUIS ET ON JUSTIFIE LES APPORTS SPECIFIQUES A CETTE ETUDE. APRES AVOIR TRAITE DES PROBLEMES D'IDENTIFICATION, UNE ETUDE NUMERIQUE A L'ECHELLE DE L'ELEMENT DE VOLUME JUSTIFIE LES CHOIX EFFECTUES ET PERMET DE PROPOSER UNE INTERPRETATION ORIGINALE DE CERTAINS RESULTATS EXPERIMENTAUX. - 3 - ETUDE DE L'ENDOMMAGEMENT EN TRACTION DANS LES STRUCTURES : LA FORMATION DES FISSURES : L'ETUDE PRECEDENTE EST ADAPTEE PUIS INTEGREE A UN PROGRAMME DE CALCUL PAR ELEMENTS FINIS. UNE EXPERIMENTATION VISANT A CARACTERISER PHYSIQUEMENT ET MECANIQUEMENT LA NOTION D'ENDOMMAGEMENT ET DE RUPTURE PERMET DE VERIFIER LE BIEN FONDE DU MODELE PROPOSE ET D'ANALYSER SES PERFORMANCES DANS LE DOMAINE DU CALCUL PREVISIONNEL.
609 citations
TL;DR: The morphology of the contact zone developed between Portland cement paste and glass slide "aggregates" has been explored using SEM and other techniques as mentioned in this paper, where a duplex film of about 1 μm total thickness is rapidly deposited on the glass surface.
134 citations
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