Shock equation of state of multi-constituent epoxy-metal particulate composites

Jordan, Jennifer L.; Herbold, Eric B.; Sutherland, Gerrit; Fraser, Andrew W.; Borg, John P.; Richards, Dickinson W.

doi:10.1063/1.3531579

Cited by 22 publications

(6 citation statements)

References 18 publications

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“…In fact, there is an important requirement for such light-weight materials with high strength from the automotive (crashworthiness testing) and aerospace industries (foreign object damage, bird strike and blade containment), and also for military applications (armour materials). In most of these areas, the final structure is routinely subjected to severe impacts during in-service life, and the transient behaviour of various kinds of composite materials under dynamic loading conditions has therefore been extensively studied (see [4] for a review of papers published before 1990, and [5][6][7][8][9][10][11][12][13][14][15][16][17] for more recent contributions). However, composites are complex materials consisting of a number of different phases arranged in complex geometries (1D, 2D or 3D arrangements).…”

Section: Introductionmentioning

confidence: 99%

Observation of the shock wave propagation induced by a high-power laser irradiation into an epoxy material

Ecault¹,

Berthe²,

Boustie³

et al. 2013

J. Phys. D: Appl. Phys.

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The propagation of laser-induced shock waves in a transparent epoxy sample is investigated by optical shadowgraphy. The shock waves are generated by a focused laser (3 ns pulse duration-1.2 to 3.4 TW cm −2) producing pressure from 44 to 98.9 GPa. It is observed that the shock wave and the release wave created by the shock reverberation at the rear face are both followed by a dark zone in the pictures. This corresponds to the creation of a tensile zone resulting from the crossing on the loading axis of the release waves coming from the edge of the impact area (2D effects). After the laser shock experiment, the residual stresses in the targets are identified and quantified through a photoelasticimetry analysis of the recovered samples. This work results in a new set of original data which can be directly used to validate numerical models implemented to reproduce the behaviour of epoxy under extreme strain rate loading. The residual stresses observed prove that the high-pressure shocks can modify the pure epoxy properties, which could have an influence on the use made of these materials.

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Section: Introductionmentioning

confidence: 99%

Observation of the shock wave propagation induced by a high-power laser irradiation into an epoxy material

Ecault¹,

Berthe²,

Boustie³

et al. 2013

J. Phys. D: Appl. Phys.

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“…So far, the need for uncertainty quantification (UQ) has not been systematically addressed in many physics-based simulations. The use of SEMSS provides an important avenue to address this need and the concept has mostly been used in 2D simulations [3,[18][19][20][21][22][23][24][25][26][27][28][29][30] over the past decade.…”

Section: Introductionmentioning

confidence: 99%

Computational Design of Three-Dimensional Multi-Constituent Material Microstructure Sets with Prescribed Statistical Constituent and Geometric Attributes

Wei

Olsen

Miller

et al. 2020

Multiscale Sci. Eng.

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The generation of three-dimensional (3D) microstructures with multiple constituents is an important part of multiscale computational simulation and design for a wide range of materials including heterogeneous polycrystalline metals, ceramics, composites, and energetics. Realistic 3D microstructures for multiphase materials are difficult to obtain experimentally or computationally. Challenges include generation and representation of complex constituent morphologies, topological arrangement and distribution, defect description, and statistical conformity. Here, we present a novel technique for systematically composing complex 3D statistically equivalent microstructure sample sets (SEMSS) with prescribed statistical constituents and morphological attributes. Based on large libraries of varying representations of individual constituents, the technique can be used with experimental micro computerized tomography (CT) scans to establish SEMSS that track the attributes of existing materials as well as to design SEMSS for new materials not yet in existence for computational exploration. Heterogeneous systems involving different combinations of molecular crystallites, metallic particles, oxidizer granules, and a polymeric matrix are designed and generated to track the properties of an existing material. The corresponding SEMSS are used in multiphysics simulations accounting for coupled thermal-mechanical processes or thermal-mechanical-chemically reactive processes. The results are used to quantify microstructure-induced response variations and point out the limitations of two-dimensional (2D) microstructures that are direct sections of the full 3D microstructures. The use of the SEMSS has also enabled uncertainty quantification (UQ) and the development of probabilistic characterizations for variations in macroscopic responses due to intrinsic material microstructural heterogeneities.

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“…Most of the work in the literature on heterogeneous solids is focused on the Hugoniot response as a function of impedance mismatch and particulate size. [10][11][12][13][14][15][16][17][18][19][20][21] Notable composites include concretes, polymer bonded explosives, epoxy-ceramics, epoxy-metal, and polymer-ceramics. These materials cover a large range of impedance mismatch ratios and particulate sizes.…”

Section: Introductionmentioning

confidence: 99%

Structure of shock waves in particulate composites

Rauls

Ravichandran

2020

Journal of Applied Physics

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The shock compression response of particulate heterogeneous solids was investigated using normal plate impact experiments and numerical simulations. A model composite system of silica glass spheres embedded in a matrix of thermoplastic polymer, polymethyl methacrylate, was developed to mimic the impedance mismatch of structural and energetic heterogeneous materials. Shock wave profiles were measured at multiple points on the rear surface of the composite specimens to characterize shock dispersion and spatial heterogeneity in material response due to the random distribution of particles. Composites with single mode as well as bimodal bead diameter distributions were subjected to plate impact loading at ∼1000 m/s resulting in an average shock stress of ∼4 GPa. Shock rise times were measured for composites of 30% and 40% glass by volume, with spherical particles of diameters in the range of 100-1000 μm. In the case of single mode composites, the shock wave rise times were observed to scale linearly with particle diameter divided by the bulk shock wave speed. The addition of a second bead size to a base size in a 30% glass by volume composite mix resulted in significant increases in shock rise time. Numerical simulations were used to develop insights into scattering and the development of shock structure in particulate composites. Shock disruption mechanisms due to particles and matrix/interface damage effects are discussed.

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Shock equation of state of multi-constituent epoxy-metal particulate composites

Cited by 22 publications

References 18 publications

Observation of the shock wave propagation induced by a high-power laser irradiation into an epoxy material

Observation of the shock wave propagation induced by a high-power laser irradiation into an epoxy material

Computational Design of Three-Dimensional Multi-Constituent Material Microstructure Sets with Prescribed Statistical Constituent and Geometric Attributes

Structure of shock waves in particulate composites

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