49加工与应用NO.022023塑料科技PlasticsScienceandTechnology含预置分层复合材料层合板低速冲击损伤分析陶百归,盛冬发*(西南林业大学土木工程学院,云南昆明650224)摘要:以T300/QY8911碳纤维复合材料层合板为研究对象,利用三维Hashin失效准则对层内损伤进行预测,引入Cohesive界面单元模拟层间分层破坏,使用Camanho刚度退化准则确定材料参数退化方案,并编写了用户材料子程序Vumat,利用ABAQUS软件对预置不同分层损伤复合材料层合板低速冲击过程进行了数值仿真模拟。在冲击载荷作用下研究层合板的动力学响应,得到不同预置分层对层合板总分层损伤面积的影响,同时分析了冲击过程中冲击点位移随时间变化的规律。结果表明:预置分层位置离层合板中间层越远,层合板抵抗冲击承载能力越弱。预置分层的分层数目越多,层合板的刚度越低,层合板抵抗冲击承载能力越弱。在预置分层的两侧,层间分层损伤面积呈塔状分布。含预置分层层合板受到冲击时,预置分层对分层损伤的扩展具有一定的抑制作用。关键词:分层损伤;低速冲击;碳纤维复合材料层合板中图分类号:TB33文献标识码:A文章编号:1005-3360(2023)02-0049-06DOI:10.15925/j.cnki.issn1005-3360.2023.02.010DamageAnalysisofCompositeLaminateswithPresetDelaminationUnderLow-SpeedImpactTAOBai-gui,SHENGDong-fa*(SchoolofCivilEngineering,SouthwestForestryUniversity,Kunming650224,China)Abstract:TakingT300/QY8911carbonfibercompositelaminatesastheresearchobject,thethree-dimensionalHashinfailurecriterionwasusedtopredicttheinter-layerdamage,andtheCohesiveinterfaceelementwasintroducedtosimulatetheinter-layerdelaminationfailure.TheCamanhostiffnessdegradationcriterionwasusedtodeterminethematerialparameterdegradationscheme,andtheusermaterialsubroutineVumatwaswritten.TheABAQUSsoftwarewasusedtosimulatethelow-speedimpactprocessofcompositelaminateswithdifferentdelaminationdamage.Thedynamicresponseoflaminatesunderimpactloadwasstudied,andtheinfluenceofdifferentpresetdelaminationonthetotaldelaminationdamageareaoflaminateswasobtained.Atthesametime,thelawofdisplacementofimpactpointwithtimeduringimpactwasanalyzed.Theresultsshowthatthefartherthepresetdelaminationpositionisfromthemiddlelayerofthelaminate,theweakertheimpact...