A new rate-dependent stress-based nonlocal damage model to simulate dynamic tensile failure of quasi-brittle materials

Pereira, L.F. Magalhaes; Weerheijm, J.; Sluys, L.J.

doi:10.1016/j.ijimpeng.2016.04.002

Cited by 38 publications

(14 citation statements)

References 26 publications

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“…Evolution of damage is directly related to the growth of two monotonic internal variables which account for the historical maximum equivalent strains reached during loading history. They are implemented separately for compression (k c ) and tension (k t ) according to [36]:…”

Section: The Adobe Delta Damage Modelmentioning

confidence: 99%

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Development of a dataset on the in-plane experimental response of URM piers with bricks and blocks

Morandi

Albanesi

Graziotti

et al. 2018

Construction and Building Materials

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Section: The Adobe Delta Damage Modelmentioning

confidence: 99%

“…To address mesh dependence without introducing non locality in the model as in [36], the concept of bounded damage rate is adapted [22]. This consists of introducing a certain delay after local damage initiation while keeping the rate of damage bounded [38].…”

Section: The Adobe Delta Damage Modelmentioning

confidence: 99%

Development of a dataset on the in-plane experimental response of URM piers with bricks and blocks

Morandi

Albanesi

Graziotti

et al. 2018

Construction and Building Materials

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“…Other local models based on the same concept have been proposed by Lee & Fenves [27], Comi & Perego [55], Wu et al [28], Pelà et al [56], Voyiadjis et al [57], Mazars et al [58]. He et al [59] and Pereira et al [60] have recently proposed nonlocal counterparts of some of the these models.…”

Section: Continuum Damage Modelmentioning

confidence: 99%

Finite element modelling of internal and multiple localized cracks

et al. 2016

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Tracking algorithms constitute an efficient numerical technique for modelling fracture in quasibrittle materials. They succeed in representing localized cracks in the numerical model without mesh-induced directional bias. Currently available tracking algorithms have an important limitation: cracking originates either from the boundary of the discretized domain or from predefined "crack-root" elements and then propagates along one orientation. This paper aims to circumvent this drawback by proposing a novel tracking algorithm that can simulate cracking starting at any point of the mesh and propagating along one or two orientations. This enhancement allows the simulation of structural case-studies experiencing multiple cracking. The proposed approach is validated through the simulation of a benchmark example and an experimentally tested structural frame under in-plane loading. Meshbias independency of the numerical solution, computational cost and predicted collapse mechanisms with and without the tracking algorithm are discussed.

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“…This results in a more realistic representation of the evolution of stresses in these situations. For more information about this model and the computation scheme used for this research the reader is referred to [21][22][23].…”

Section: Regularization Modelmentioning

confidence: 99%

Simulation of dynamic behavior of quasi-brittle materials with new rate dependent damage model

Pereira

Weerheijm²,

Sluijs³

2016

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

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Abstract. In concrete often complex fracture and fragmentation patterns develop when subjected to high straining loads. The proper simulation of the dynamic cracking process in concrete is crucial for good predictions of the residual bearing capacity of structures in the risk of being exposed to extraordinary events like explosions, high velocity impacts or earthquakes.As it is well known, concrete is a highly rate dependent material. Experimental and numerical studies indicate that the evolution of damage is governed by complex phenomena taking place simultaneously at different material scales, i.e. micro, meso and macro-scales. Therefore, the constitutive law, and its rate dependency, must be adjusted to the level of representation. For a proper phenomenological (macroscopic) representation of the reality, the constitutive law has to explicitly describe all phenomena taking place at the lower material scales. Macro-scale inertia effects are implicitly simulated by the equation of motion.In the current paper, dynamic crack propagation and branching is studied with a new rate-dependent stress-based nonlocal damage model. The definition of rate in the constitutive law is changed to account for the inherent meso-scale structural inertia effects. This is accomplished by a new concept of effective rate which governs the dynamic delayed response of the material to variations of the deformation (strain) rate, usually described as micro-inertia effects. The proposed model realistically simulates dynamic crack propagation and crack branching phenomena in concrete.

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A new rate-dependent stress-based nonlocal damage model to simulate dynamic tensile failure of quasi-brittle materials

Cited by 38 publications

References 26 publications

Development of a dataset on the in-plane experimental response of URM piers with bricks and blocks

Development of a dataset on the in-plane experimental response of URM piers with bricks and blocks

Finite element modelling of internal and multiple localized cracks

Simulation of dynamic behavior of quasi-brittle materials with new rate dependent damage model

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