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摘要: 采用分离式霍普金森压杆冲击实验系统,对流固耦合的多孔隙红砂岩试样进行了不同冲击速率下 的损伤效应对比实验,得到反复冲击作用下多孔隙砂岩试件的损伤演化本构关系曲线。通过检测不同冲击速 率作用前后流固耦合砂岩试样的声波速度变化和冲击损伤破坏结果,探讨多孔隙流固耦合砂岩的冲击损伤 演化的主要影响因素,得出冲击损伤强度随声波速度和孔隙率的变化曲线;提出不同耦合介质和孔隙率对多 孔隙砂岩冲击损伤效应的影响关系。
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关键词:
- 爆炸力学 /
- 损伤效应 /
- 流固耦合\多孔隙砂岩 /
- 冲击作用
Abstract: ByusingasplitHopkinsonpressurebarsystem,thedamageeffectsofporoussandstone specimenswereexperimentallyinvestigatedbyconsideringfluid-solidcoupling.Thedynamicstressstraincurvesoftheporoussandstonespecimenswereobtainedundertherepeatedimpactloadings withdifferentspeedsandtheiracousticwavespeedsweremeasuredbeforeandafterimpact.Thedamageresultsofthesandstonespecimenswereanalyzedandthemaininfluencingfactorswereexplored. Thevaryingcurvesofthebreakingstrengthsofthesandstonewereobtained withacousticwave speedsandporousratio,respectively.Andtheinfluencesofporosityandcouplingmediawereproposedontheimpactdamageeffectsofporoussandstone.-
Key words:
- mechanicsofexplosion /
- damageeffect /
- fluid-solidcoupling /
- poroussandstone
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