On numerical implementation of a coupled rate dependent damage‐plasticity constitutive model for concrete in application to high‐rate dynamics

Hervé, Guillaume; Gatuingt, Fabrice; Ibrahimbegović, Adnan

doi:10.1108/02644400510603023

Cited by 26 publications

(20 citation statements)

References 20 publications

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“…Another possibility would be to take the static critical stress for insertion and to add, within the cohesive law, a rate-dependent viscosity parameter which depends on the opening rate (for instance [18]). A different approach, which would not involve a cohesive-approach, would consist in having a visco-plastic bulk material (such as proposed in combination with a continuum damage formulation in [13]). …”

Section: A Rate-dependent Cohesive Lawmentioning

confidence: 99%

Influence of the meso-structure in dynamic fracture simulation of concrete under tensile loading

Snozzi

Caballero²,

Molinari

2011

Cement and Concrete Research

114

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We investigate the dynamic behavior of concrete in relation to its composition within a computational framework (FEM). Concrete is modeled using a meso-mechanical approach in which aggregates and mortar are represented explicitly. Both continuum phases are considered to behave elastically, while nucleation, coalescence and propagation of cracks are modeled using the cohesive-element approach. In order to understand the loading-rate sensitivity of concrete, we simulate direct tensile-tests for strain rates ranging 1-1000 s −1. We investigate the influence of aggregate properties (internal ordering, size distribution and toughness) on peak strength and dissipated fracture energy. We show that a rate independent constitutive law captures the general increase of peak strength with strain rate. However, a phenomenological rate-dependent cohesive law is needed to obtain a better agreement with experiments. Furthermore, at low rates, peak strength is sensitive to the inclusions' toughness, while the matrix dominates the mechanical behavior at high rates.

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Section: A Rate-dependent Cohesive Lawmentioning

confidence: 99%

Influence of the meso-structure in dynamic fracture simulation of concrete under tensile loading

Snozzi

Caballero²,

Molinari

2011

Cement and Concrete Research

114

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“…To achieve the design and analyses of these structures, it is important to investigate the dynamic mechanical response of concrete. Several macroscopic models for concrete have been developed to perform nonlinear numerical analysis of such problems. In these models, a rate effect in tension has often been introduced to represent the experimental data for loading strain rates exceeding 1 /s .…”

Section: Introductionmentioning

confidence: 99%

Numerical determination of the tensile response and the dissipated fracture energy of concrete: role of the mesostructure and influence of the loading rate

Gatuingt

Snozzi

Molinari

2013

Num Anal Meth Geomechanics

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Numerical determination of the tensile response and the dissipated fracture energy of concrete: role of the meso-structure and influence of the loading rate. International Journal for Numerical and Analytical Methods in Geomechanics, Wiley, 2013Wiley, , 37, pp.3112-3130. 10.1002Wiley, /nag.2181 Numerical determination of the tensile response and the dissipated fracture energy of concrete: role of the meso-structure and influence of the loading rate AbstractAt the mesoscopic scale concrete can be considered as a mix of coarse aggregates with a mortar paste matrix. In this paper we investigate numerically the influence of aggregates arrangements and loading rate on the tensile response of concrete. Each coarse aggregate is assumed to be circular with six different radiuses following the aggregates size distribution of real gravel. Rateindependent cohesive elements are used to model failure within the mesostructure. Our results show that the spatial distribution of heterogeneities does not influence the peak strength, while it changes the post-peak macroscopic response. This implies that our specimen size is large enough for strength computation but that larger mesostructures should be considered to obtain fully reliable toughness predictions. While, the cohesive approach is able to capture the transition from one macro-crack in quasi-static to multiple micro-cracks in fast dynamics, which increases the dissipated fracture energy, our results suggest that the full extent of the high-rate strengthening of concrete observed experimentally for loading rates greater thanε = 1/s cannot be captured with rate independent constitutive laws.

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“…The latter provides at each step the admissible values of stress with respect to the chosen criteria, and leads to a very robust numerical implementation. For more details on model numerical implementation we refer to Herve et al (2005). Sandia's Laboratory tests simulations: in order to check the reliability of the proposed constitutive model we carried out simulations of impact tests performed in Sandia Laboratory by Sugano and co-workers.…”

Section: Nonlinear Impact Dynamics and Field Transfermentioning

confidence: 99%

“…The fracture of concrete in tension is described by a criterion depending directly upon the principal values of tensile elastic strains in the manner which includes the modification for different fracture energies for cracking in tension versus concrete compaction and cracking in compression. The latter criterion for the concrete compaction and damage in compression is chosen (Herve et al, 2005) as a Gurson-like plasticity criterion, defined with:…”

Section: Outline Of Proposed Multi-scale Dynamics Analysis Proceduresmentioning

confidence: 99%

Nonlinear impact dynamics and field transfer suitable for parametric design studies

Ibrahimbegović

Hervé²,

Villon

2009

Engineering Computations

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PurposeThe purpose of this paper is to provide the methodology for structural design of complex massive structures under impact by a large airplane.Design/methodology/approachUsing case studies, the issues related to multi‐scale modelling of inelastic damage mechanisms for massive structures are discussed, as well as the issues pertaining to the time integration schemes in presence of different scales in time variation of different sub‐problems, brought by a particular nature of loading with a very short duration) and finally the issues related to model reduction seeking to provide an efficient and yet sufficiently reliable basis for parametric studies which are an indispensable part of a design procedure.FindingsSeveral numerical simulations are presented in order to further illustrate the approaches proposed herein. Concluding remarks are stated regarding the current and future research in this domain.Originality/valueProposed design procedure for complex massive engineering structures under impact by a large airplane provides on one side a very reliable representation of inelastic damage mechanisms and external loading represented by the solution of the corresponding contact/impact problem, and on the other side a very efficient basis obtained by model reduction for performing the parametric design studies.

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On numerical implementation of a coupled rate dependent damage‐plasticity constitutive model for concrete in application to high‐rate dynamics

Cited by 26 publications

References 20 publications

Influence of the meso-structure in dynamic fracture simulation of concrete under tensile loading

Influence of the meso-structure in dynamic fracture simulation of concrete under tensile loading

Numerical determination of the tensile response and the dissipated fracture energy of concrete: role of the mesostructure and influence of the loading rate

Nonlinear impact dynamics and field transfer suitable for parametric design studies

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