A damage model for the dynamic fragmentation of brittle solids

Denoual, Christophe; Hild, François

doi:10.1016/s0045-7825(99)00221-2

Cited by 143 publications

(135 citation statements)

References 15 publications

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“…Some anisotropy of the crack distribution is taken into account as well as coalescence and nucleation of cracks. Independently, another approach is initiated by some authors (Denoual and Hild, 2000) to improve the damage description. It is assumed that a damage tensor depending on three independent scalar variables matches the principal stress frame.…”

Section: Resultsmentioning

confidence: 99%

Mechanical characterisation of a viscoplastic material sensitive to hydrostatic pressure

Gratton¹,

Gontier²,

Allah³

et al. 2009

European Journal of Mechanics - A/Solids

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International audienceThe present paper deals with the characterisation of the static mechanical behaviour of an energetic material all along its lifespan. The material behaviour is viscoplastic, damageable and sensitive to hydrostatic pressure. For such materials, existing models have generally been developed in the framework of transient dynamic behaviour. These models are not suitable for a static study. Therefore a specific experimental protocol and an associated model are developed. Characterisation is derived from both uniaxial compressive, tensile tests and tri-axial tests. Plastic behaviour is described by means of a parabolic yield criterion and a new hardening law. Non-associated plastic flow rule and isotropic damage complete the model. The performance of the model is illustrated through the simulation of various loading paths

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Section: Resultsmentioning

confidence: 99%

Mechanical characterisation of a viscoplastic material sensitive to hydrostatic pressure

Gratton¹,

Gontier²,

Allah³

et al. 2009

European Journal of Mechanics - A/Solids

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show abstract

“…This fragmentation was observed in details during edge-on impact experiments on monolithic ceramics Riou et al 1998;Denoual and Hild 2000) and on a porous silicon carbide impregnated or not with an aluminum alloy . The use of an ultra-high speed camera allows for the observation of a damage pattern made of micro-cracks oriented in the radial direction that develops from the impact edge to the opposite face.…”

Section: Introductionmentioning

confidence: 85%

“…Several Continuum Damage Mechanics models may be used with an isotropic (Grady and Kipp 1980;Margolin 1983;Rajendran 1994) or anisotropic (Espinosa et al 1998;Denoual and Hild 2000) description to account for multiple fragmentation. In the numerical simulations performed herein, the medium is assumed to be continuous on the scale of a finite element in which numerous cracks are expected to form.…”

Section: Numerical Analysis Of Damage Induced By Impact In Concretementioning

confidence: 99%

“…It may be noted that alternative (discrete) approaches may be followed (Camacho and Ortiz 1996;Mastilovic and Krajcinovic 1999;Ibrahimbegovic and Delaplace 2003). To account for confined damage, the KST model (Krieg 1978;Swenson and Taylor 1983) is coupled with a damage model based upon a fragmentation analysis (Denoual and Hild 2000;2002;Forquin et al 2003).…”

Section: Numerical Analysis Of Damage Induced By Impact In Concretementioning

confidence: 99%

“…The ceramic tile is mainly damaged before any wave reflection. An anisotropic damage model was proposed to predict the orientation and crack density (Denoual and Hild 2000;2002).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic Fragmentation of an Ultrahigh-Strength Concrete during Edge-On Impact Tests

Forquin

Hild

2008

J. Eng. Mech.

Self Cite

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Abstract:To understand and model damage generated during impact by a penetrator of ultra-high strength concrete targets, edge-on impact tests are performed with the so-called Ductal ® concrete, which is unreinforced or reinforced with short fibers. Two edge-on impact configurations are designed with a dynamic confinement system. The first configuration uses aluminum projectiles and allows us to study the dynamic fragmentation that spreads out within the tile without any confined damage close to the impact point. The fragmentation process is composed of numerous oriented millimetric cracks. In the second configuration, steel projectiles are used with a higher impact velocity. Damaged zones are visualized by using an ultra-high speed camera and a sarcophagus configuration designed to prevent the fragments from moving. The post-mortem studies of impacted tiles enable us to observe an intense fragmentation of the targets and confined damage close to the impact point if steel projectiles are used. Simulations are performed with an anisotropic damage model coupled with a concrete plasticity model. Orientation and crack density are compared with postmortem observations.

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Rate‐Dependent Behavior and Modeling for Transient Analyses

Gatuingt¹

2013

Mechanical Behavior of Concrete

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A damage model for the dynamic fragmentation of brittle solids

Cited by 143 publications

References 15 publications

Mechanical characterisation of a viscoplastic material sensitive to hydrostatic pressure

Mechanical characterisation of a viscoplastic material sensitive to hydrostatic pressure

Dynamic Fragmentation of an Ultrahigh-Strength Concrete during Edge-On Impact Tests

Rate‐Dependent Behavior and Modeling for Transient Analyses

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