Animprovedsideline/erodingalgorithm
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摘要: 将二维拉格朗日有限元程序LTZ-2D中侵蚀滑移的计算方法进行了改进。将单元侵蚀判断标准 由单一的累积塑性应变标准改为累积塑性应变、单元的硬化因子以及单元相对于滑移线的变形角度的综合 判断标准。同时,利用本文的改进算法对侵彻问题进行了数值模拟。计算结果显示,采用改进后的侵蚀滑移 计算方法不仅很好地显示了侵彻过程中弹靶的接触面,而且接触面具有较好的光滑性。Abstract: Aslideline/erodingalgorithm,whichwasimplementedintothe2DLagrangianelasticityplasticityhydrodynamiccodeLTZ- 2D,wasimproved.Thecellerodingcriterionwaschangedfromthe accumulativeplasticstraintoanintegratedcriterionmadeoftheaccumulativeplasticstrain,thedimensionlessstiffnessfactorandtheangleoppositetheslideline. Andthepenetrationproblemswere numericallysimulatedbytheimprovedalgorithm.Calculatedresultsdisplaythattheimprovedalgorithmcanresolvetheinterfacebetweenthetwoimpactingbodiesandsmoothoutthecurvatureofth slideline.
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Key words:
- mechanicsofexplosion /
- slideline/erodingalgorithm /
- penetration /
- impactingbodies
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