-
摘要: 基于H.Meng的动摩擦实验结果,建立了一个端面动摩擦模型,以描述端面动摩擦因数随SHPB 塑料试样与钢压杆接触界面间最大径向相对滑动速度的关系。在SHPB实验的数值模拟中,分别考虑了该 端面动摩擦模型和以往被广泛采用的常摩擦因数模型,结果发现,选取不同的端面摩擦模型不影响通过塑料 SHPB实验的数值模拟获得的转折应变率(量级为102s-1),然而当应变率超出转折应变率以上时,不同的端 面摩擦模型会对塑料SHPB实验的数值模拟结果产生显著影响,使用提出的端面动摩擦模型可得到更准确 的塑料SHPB实验的数值模拟结果。Abstract: Abstract:AkineticinterfacefrictionmodelisproposedbasedonthekineticfrictiontestsbyMengto describethevariationofkineticfrictioncoefficientwiththemaximumradialrelativevelocitybetween theSHPBpolycarbonate(PC)specimenandsteelpressurebars.Thekineticinterfacefrictionmodel andtheconstantfrictioncoefficientmodelareimplementedintothenumericalsimulationsofSHPB tests.Itshowsthatusingdifferentinterfacialfrictionmodelshaslittleinfluenceonthetransitional strainrate(intheorderof102s-1)obtainedfromthenumericalsimulationsofSHPBtestsonpolymerspecimens. Whilethestrain-rateexceedsthetransitionalstrainrate,thisinfluenceisobvious, anditisnecessarytousethekineticinterfacialfrictionmodel,ratherthantheconstantfrictioncoefficientmodelforobtainingmoreaccuratenumericalsimulationsofSHPBtestsonpolymerspecimens.
-
Key words:
- solidmechanics /
- interfacialfrictioneffect /
- SHPBexperiment /
- plastics /
- relativeslidingvelocity
-
计量
- 文章访问数: 2450
- HTML全文浏览量: 95
- PDF下载量: 218
- 被引次数: 0