《玻璃纤维》2023年第2期33测试分析中图分类号：TB332文献标识码：A风电叶片大梁用拉挤板复合组件Ⅰ型层间断裂韧性测试研究*文治天，谢梦媛，孙闪闪，郝郑涛，方允伟，冯冠铭，倪启凡（南京国材检测有限公司，南京210012）摘要：通过两种方法制备了风电叶片大梁用拉挤板复合组件Ⅰ型层间断裂韧性试样即双悬臂梁（doublecantileverbeam，DCB）试样，并依据ASTMD5528进行试验，研究分析其断裂行为。实验结果表明，直接采用树脂进行复合的DCB试样会因内聚破坏和界面破坏的相互转换而导致非稳定扩展，进而使得应变能释放率迅速下降。含有导流织物的DCB试样其裂纹扩展较为稳定，匹配性较好导流织物可以提高I型层间断裂韧性（GIC）。采用有限元平台的内聚力模型（cohesivezonemodel，CZM）模拟含有导流织物试样的裂纹扩展过程，结果表明内聚力模型模拟结果与试验的一致性较好。在裂纹起始扩展阶段，界面增韧作用越强，对模拟影响越大，但当裂纹稳定扩展之后，界面的增韧作用基本不对内聚力模型模拟产生影响。关键词：拉挤板材复合组件；I型层间断裂韧性；导流织物；内聚力模型；有限元分析DeterminationofModeIInterlaminarFractureToughnessofPultrudedPanelsAssembliesUsedforWindTurbineBlades*WenZhitian,XieMengyuan,SunShanshan,HaoZhengtao,FangYunwei,FengGuanming,NiQifan(NanjingGuoCaiTestingCo.,Ltd,Nanjing210012)Abstract:Doublecantileverbeam(DCB)specimensweremadefrompultrudedpanelsassembliesusedforwindturbinebladesbytwomethods.ThemodeIinterlaminarfracturetoughnesswasdeterminedaccordingtoASTMD5528standard,andthefracturemechanicswereanalyzed.TheexperimentalresultsshowedthatontheDCBspecimensbondedwithresinonly,unstablecrackgrowthoccuredduetothemutualconversionbetweencohesivefailureandinterfacefailure,andthenthestrainenergyreleaseratedecreasedrapidly.OntheDCBspecimenscontainingfabricsasflowmedia,thecrackgrowthwasmorestable,andthemodeIinterlaminarfracturetoughness(GIC)wasimprovedeffectivelywhencompatibleflowmediawereused..Thepropagationofcracksonthosespecimenswithflowmediawassimulatedbyfiniteelementmethodusingcohesivezonemodel(CZM).ItshowedthatthesimulationresultsofCZMwerewellagreedwiththeexperimentalresults.Thestrongerthetougheningeffect,thegreatertheinfluenceon...
