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摘要: 通过在再生核质点法中引入Johnson-Cook本构方程及损伤模型,并利用新型的滑移面算法及配 点法解决再生核质点法中的接触面和质点滑移问题,方便实现边界条件和计算过程中质点速度调整。通过侵 彻过程再生核质点法研究,实现了弹丸侵彻靶板过程的模拟分析,避免了有限元法中单元严重变形和破坏过 程的网格重构困难,提高了分析精度和计算速度,可方便模拟侵彻的大变形和高应变率现象。Abstract: TheJohnson-Cookconstitutiverelationsanddamagemodelwereintroducedintothereproducingkernelparticle( RKP)method,andanewinterfacecalculationmethodandacollocationmethodwereproposedtosolvetheproblemsofinterfaceandglidingparticles, realizetheboundaryconditionsandadjusttheparticlevelocityinthecomputationalprocess. TheimprovedRKP methodwas appliedtonumericallyanalyzetheobliquepenetrationprocessofasteelcylindricalpelletintoafixed steelplate.Inthecomputation,thepelletandtargetplateweredividedintokernelparticlesother thanelements.ComputationalresultsshowthattheimprovedRKP methodcanavoidthefiniteelementdeformationinthefiniteelementmethodandtheelementreconstructioninthedamageprocess andenhanceanalysisaccuracyandcomputationalspeed.AndtheimprovedRKPmethodcanbeused toconvenientlyanalyzethelargedeformationandhighstrainratephenomenainpenetrationprocess.
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Key words:
- mechanicsofexplosion /
- penetration /
- RKPM /
- highspeedimpact /
- nonlinearity
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