Influence of the shape of RDX grains on the creation of hot spots by mesoscale modeling
CEA-Gramat studies the sensitivity of energetic materials to enhance their security and reliability. The conditions leading to the initiation of an explosive must be understood to control its sensitivity. According to the hot spots theory, the shock initiation of heterogeneous explosives is related...
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description | CEA-Gramat studies the sensitivity of energetic materials to enhance their security and reliability. The conditions leading to the initiation of an explosive must be understood to control its sensitivity. According to the hot spots theory, the shock initiation of heterogeneous explosives is related to their microstructure: the shock interacts with the heterogeneities of the microstructure (pores and inclusions, morphology of grains and fragments, debonding, etc.) and creates local deposits of energy. To describe these hot spots, energetic materials have to be modeled at a scale allowing the discretization of their microstructure: the mesoscale. Micro-computed tomographies of energetic materials are done at CEA-Gramat and analyzed to build geometric models used in finite element simulations. Two kinds of models are studied:-Real models are directly built on the real microstructures extracted from micro-computed tomographies.-Virtual models are based on the same microstructures but simplified to study independently the effects of microstructural parameters (granulometry, porosity, filler content{\ldots}) on the creation of hot spots. Compositions based on different kind of RDX particles in an inert binder are studied through numerical simulation. The influence of particle shape on the inert shock response is investigated at the mesoscale. Local heterogeneities of pressure and temperature fields appear intimately related to the morphological properties of the microstructures. Particles with sharp edges create more hot spots than spherical particles. |
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The conditions leading to the initiation of an explosive must be understood to control its sensitivity. According to the hot spots theory, the shock initiation of heterogeneous explosives is related to their microstructure: the shock interacts with the heterogeneities of the microstructure (pores and inclusions, morphology of grains and fragments, debonding, etc.) and creates local deposits of energy. To describe these hot spots, energetic materials have to be modeled at a scale allowing the discretization of their microstructure: the mesoscale. Micro-computed tomographies of energetic materials are done at CEA-Gramat and analyzed to build geometric models used in finite element simulations. Two kinds of models are studied:-Real models are directly built on the real microstructures extracted from micro-computed tomographies.-Virtual models are based on the same microstructures but simplified to study independently the effects of microstructural parameters (granulometry, porosity, filler content{\ldots}) on the creation of hot spots. Compositions based on different kind of RDX particles in an inert binder are studied through numerical simulation. The influence of particle shape on the inert shock response is investigated at the mesoscale. Local heterogeneities of pressure and temperature fields appear intimately related to the morphological properties of the microstructures. 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Compositions based on different kind of RDX particles in an inert binder are studied through numerical simulation. The influence of particle shape on the inert shock response is investigated at the mesoscale. Local heterogeneities of pressure and temperature fields appear intimately related to the morphological properties of the microstructures. Particles with sharp edges create more hot spots than spherical particles.</description><subject>Computation</subject><subject>Computer simulation</subject><subject>Energetic materials</subject><subject>Finite element method</subject><subject>Grains</subject><subject>Inclusions</subject><subject>Mathematical models</subject><subject>Mesoscale phenomena</subject><subject>Microstructure</subject><subject>Particle shape</subject><subject>Porosity</subject><subject>RDX</subject><subject>Reliability aspects</subject><subject>Sensitivity</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqNyksKwjAUheEgCBbtHi44LrRJGp37QKci6ExivX2RJjU3Hbh7S3EBjg4_35mxiAuRJVvJ-YLFRG2aplxteJ6LiN3OtjQD2gLBlRBqBKp1P8Vlf4fK68YSODtR4VGHZoxRaxeAehcInh_okBwV2iB07oWmsdWKzUttCOPfLtn6eLjuTknv3XtACo_WDd6O9OBSqUxmUuXiv9cX0wtAww</recordid><startdate>20201201</startdate><enddate>20201201</enddate><creator>Belon, Steve</creator><creator>Erzar, Benjamin</creator><creator>Kaeshammer, Élodie</creator><creator>Borne, Lionel</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20201201</creationdate><title>Influence of the shape of RDX grains on the creation of hot spots by mesoscale modeling</title><author>Belon, Steve ; Erzar, Benjamin ; Kaeshammer, Élodie ; Borne, Lionel</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_24661414653</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Computation</topic><topic>Computer simulation</topic><topic>Energetic materials</topic><topic>Finite element method</topic><topic>Grains</topic><topic>Inclusions</topic><topic>Mathematical models</topic><topic>Mesoscale phenomena</topic><topic>Microstructure</topic><topic>Particle shape</topic><topic>Porosity</topic><topic>RDX</topic><topic>Reliability aspects</topic><topic>Sensitivity</topic><toplevel>online_resources</toplevel><creatorcontrib>Belon, Steve</creatorcontrib><creatorcontrib>Erzar, Benjamin</creatorcontrib><creatorcontrib>Kaeshammer, Élodie</creatorcontrib><creatorcontrib>Borne, Lionel</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Access via ProQuest (Open Access)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Belon, Steve</au><au>Erzar, Benjamin</au><au>Kaeshammer, Élodie</au><au>Borne, Lionel</au><format>book</format><genre>document</genre><ristype>GEN</ristype><atitle>Influence of the shape of RDX grains on the creation of hot spots by mesoscale modeling</atitle><jtitle>arXiv.org</jtitle><date>2020-12-01</date><risdate>2020</risdate><eissn>2331-8422</eissn><abstract>CEA-Gramat studies the sensitivity of energetic materials to enhance their security and reliability. The conditions leading to the initiation of an explosive must be understood to control its sensitivity. According to the hot spots theory, the shock initiation of heterogeneous explosives is related to their microstructure: the shock interacts with the heterogeneities of the microstructure (pores and inclusions, morphology of grains and fragments, debonding, etc.) and creates local deposits of energy. To describe these hot spots, energetic materials have to be modeled at a scale allowing the discretization of their microstructure: the mesoscale. Micro-computed tomographies of energetic materials are done at CEA-Gramat and analyzed to build geometric models used in finite element simulations. 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subjects | Computation Computer simulation Energetic materials Finite element method Grains Inclusions Mathematical models Mesoscale phenomena Microstructure Particle shape Porosity RDX Reliability aspects Sensitivity |
title | Influence of the shape of RDX grains on the creation of hot spots by mesoscale modeling |
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