CAJ | 학술논문

为提高丁羟（ HTPB）推进剂／衬层界面数值仿真结果的准确性，首先改进了单搭接试件，通过剪切实验获取界面断裂参数，而后分别采用双线型模型和指数型模型对试件进行数值研究，进行影响分析，并在此基础上建立了一种基于损伤变量的自定义内聚力模型，使模型具有了明确的物理含义。结果表明，改进的单搭接试件能够测定柔韧粘接件的II型断裂参数；II型界面断裂时，内聚力曲线形式与实验曲线形式一致；该基于损伤的内聚力模型能够比双线性模型和指数型模型更准确地反映HTPB推进剂／衬层界面的II型断裂性质。
위제고정간（ HTPB）추진제／츤층계면수치방진결과적준학성，수선개진료단탑접시건，통과전절실험획취계면단렬삼수，이후분별채용쌍선형모형화지수형모형대시건진행수치연구，진행영향분석，병재차기출상건립료일충기우손상변량적자정의내취력모형，사모형구유료명학적물리함의。결과표명，개진적단탑접시건능구측정유인점접건적II형단렬삼수；II형계면단렬시，내취력곡선형식여실험곡선형식일치；해기우손상적내취력모형능구비쌍선성모형화지수형모형경준학지반영HTPB추진제／츤층계면적II형단렬성질。
In order to raise the precision of the numerical simulation result of HTPB propellant/insulation,firstly,the SLJ test was improved and conducted to obtain the interface parameters. Then the bilinear CZM and the exponential CZM were adopted to conduct the numerical analysis,separately.At last,an influence analysis was made and a customized CZM model was built base on damage variable,which gave the model a significant physical meaning.The result shows that the improved SLJ test can determine the interface parameters of ductile adherends.The CZM law has a similar trend to the simulation curve,and the CZM based on damage can better simulate mode?II interface fracture properties between HTPB propellant and insulation than bilinear CZM and exponential CZM.