Influencesofconstitutivemodelsonnumericallysimulatedresultsof X-raythermalshockwavesincompositematerials
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摘要: 以碳酚醛靶中的一维应变热击波为例,讨论本构模型对热击波数值模拟结果的影响。数值模拟采 用3种本构模型,即各向同性理想弹塑性本构模型、各向异性理想弹塑性本构模型及各向异性动态弹塑性本 构模型。结果表明:与各向同性理想弹塑性、各向异性理想弹塑性本构模型相比,利用各向异性动态弹塑性本 构模型获得的热击波应力峰值较小、应力峰值衰减较快,与实验结果更接近。Abstract: Theone-dimensionalthermalshockwaveinacarbon-phenoliccompositewastakenforan exampletodiscusstheinfluencesofconstitutivemodelsonnumericallysimulatedresultsofX-ray thermalshock wavesincomposite materials.Thecorrespondingnumericalsimulationswereperformedbyadoptingthreedifferentconstitutivemodels. Thesimulatedresultsrevealthatthepeak stressacquiredbytheanisotropicdynamicelasto-plasticconstitutivemodelislower,itsattenuationis fasteranditisbeclosertotheexperimentalresultthanthoseobtainedbytheidealisotropicelastoplasticmodelandtheidealanisotropicelasto plasticmodel,respectively.
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Key words:
- solidmechanics /
- constitutitivemodel /
- anisotropic /
- thermalshockwave
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