A constitutive model for the dynamic response of brittle materials

Addessio, F. L.; Johnson, J. N.

doi:10.1063/1.346090

Cited by 119 publications

(79 citation statements)

References 23 publications

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“…The area of this crimpled surface (F A ) represents the sum total of reacting hot surfaces in an effective sense. This step is similar to one where crack volumes are summed to calculate the effect of distributed cracks on elastic properties (Addessio and Johnson 1990). Implicitly assumed in this step are (1) that once formed, hot spots are identical with a possible exception of size, (2) that intermediate steps in forming hot spots are not significant in burn calculations, and (3) gas-phase reactions in the reservoir are uniform and dependent only on the current state.…”

Section: Energy Localization and Reacting Surface Evolutionmentioning

confidence: 99%

Mechanistic Reactive Burn Modeling of Solid Explosives

Horie¹,

Hamate²,

Greening³

2003

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Section: Energy Localization and Reacting Surface Evolutionmentioning

confidence: 99%

Mechanistic Reactive Burn Modeling of Solid Explosives

Horie¹,

Hamate²,

Greening³

2003

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“…Earlier modelling approaches for such materials (Addessio and Johnson, 1990), (Bennett et al, 1998), (Hackett and Bennett, 2000) have been developed in the framework of transient dynamic behaviour, thus are not suitable for a static study. So a new model and the associated experimental protocol are developed.…”

Section: Accepted M Manuscriptmentioning

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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“…The linear viscoelasticity/damage formulation presented here is based primarily upon the work of Addessio and Johnson [2]. During deformation, the distribution of microcracks in the material is assumed to be random, with the initial distribution being exponential.…”

Section: Model Formulationmentioning

confidence: 99%

A computational viscoelasticity/damage/plasticity model for high-explosive materials

Rangaswamy¹,

Hackett²

2007

WIT Transactions on Modelling and Simulation, Vol 45

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It is important to be able to accurately predict the behavior of high-explosive (HE) materials because of the sensitivity with which they respond in the environment in which they are designed to perform, and because they are also extremely sensitive to accidental mechanical shock, which might occur during handling. Thus it is imperative that a capability exists to develop a constitutive material model and simulate the response of HE materials subjected to a variety of thermomechanical loading conditions, a response that is characterized as highly complex. It has been demonstrated through uniaxial strain-rate experiments conducted at the Los Alamos National Laboratory (LANL) that the initial response of HE material is rate-dependent, with the growth of microcracks continuing under load until the yield strength is reached. In a material such as this, the initial stages of deformation involve both elastic and viscous mechanisms. It has been postulated that this observed behavior could be categorized as nonlinear viscoelasticity, coupled with continuing microcracking. A computational material model containing viscoelasticity, internal damage accumulation and rate-dependent plasticity has been formulated for the purpose of simulating the behavior of these types of material systems. The formulation has been incorporated as a user-defined material (UMAT) into the ABAQUS finite element code. It is demonstrated in this paper how the material model can be employed by calibrating it to the experimental response of the material Mock 900-21, a high-explosive material mock utilized at LANL.

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A constitutive model for the dynamic response of brittle materials

Cited by 119 publications

References 23 publications

Mechanistic Reactive Burn Modeling of Solid Explosives

Mechanistic Reactive Burn Modeling of Solid Explosives

Mechanical characterisation of a viscoplastic material sensitive to hydrostatic pressure

A computational viscoelasticity/damage/plasticity model for high-explosive materials

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