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摘要: 基于准等熵压缩实验,建立了考虑线弹塑性效应的反积分数学模型,并针对Sandia的含能材料 RDX(210)的无反应准等熵压缩实验数据,进行了数值模拟和分析。结果表明,本文模型可以恰当地描述该 含能材料的准等熵压缩实验过程,可以得到与文献结果吻合较好的样品加载速度历史;计算得到了样品内部 任意位置直至加载面上的信息、应力应变和拉格朗日声速的变化规律;基于参数的数学搜索过程,获得了该 RDX(210)加载实验的准等熵参考线。Abstract: Aimedatquasi-isentropiccompressionexperiments,abackwardintegrationmodelwasproposedbyconsi- deringlinearelastic-plasticeffects.Thequasi-isentropiccompressionexperimentdata ofRDX(210)crystalfromtheZmachineofSandiaNationalLaboratorywerenumericallyanalyzed. ComparisonbetweenthenumericalresultsandthedatabyBaerM R,etaldisplaysthattheproposed backwardintegration modelcanbeusedtodescribethequasi-isentropiccompressionofRDX(210) crystal.AndthisintegrationmethodwasusedtocalculatetheinformationatanypositionintheRDX (210)sample,especiallyattheloadingsurface,stress-straincurvesandLagrangiansoundvelocities. Thequasi-isentropewasachievedbasedonthemathe-maticsearchprocessofparameters.
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Key words:
- solidmechanics /
- quasi-isentrope /
- backwardintegrationmethod /
- RDX(210) /
- Lagrangian soundvelocity
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