-
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.
-
Key words:
- mechanicsofexplosion /
- penetration /
- RKPM /
- highspeedimpact /
- nonlinearity
计量
- 文章访问数: 2290
- HTML全文浏览量: 94
- PDF下载量: 219
- 被引次数: 0