基于内聚力模型的铝/丁羟胶粘接界面力学研究  

Research on adhesive interfacial mechanical properties of Al / HTPB based on cohesive zone model

作　　者：韦震[1] 鞠玉涛[1] 周清春 韩波[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《固体火箭技术》2014年第2期241-246,252,共7页Journal of Solid Rocket Technology

基　　金：中央高校基本科研业务费专项资金(NUST2011XQTR13)

摘　　要：通过建立双线性内聚力模型,研究了Al/HTPB双悬臂梁形式粘接件的I型断裂行为,并通过数值仿真双悬臂梁载荷-位移曲线与试验曲线相匹配的分部反演数值方法,获得了双线性内聚力模型中的2个重要内聚参数。通过与线弹性断裂力学下经典梁理论方法得到的断裂韧性相比,表明反演获得的参数更加真实地反映了材料的粘接性质,并分析了经典梁理论方法得到的断裂韧性参数不准确的原因。通过Al/HTPB粘接件的单轴拉伸试验,对所建立的内聚力模型及获得的相关参数的正确性进行了验证。结果显示,所建立的内聚力模型能够很好地预测粘接件的力学行为,可作为HTPB推进剂进一步的细观力学研究的基础。The mode-I fracture behavior of double cantilever beam adhesive joints made from aluminium sheet and hydroxyl-ter- minated polybutadienec（HTPB） was studied by establishing a bilinear cohesive zone model （CZM）. Cohesive-zone parameters were obtained by segment inversion identification method, which is matching numerical resuh of load-displacement curve to experimental curve.Results show that the inversion parameters are more accurate in reflection of the adhesive property of the materials compared with the fracture toughness which is obtained by the linear elastic fracture mechanics classical beam theory, and the inaccurate rea- son of the parameters obtained by classical beam theory method was analyzed. The established CZM and the obtained parameters were verified by Al/HTPB adhesive uniaxial tensile test. Results show that CZM can accurately predict the mechanical behavior of the joints, which provides a basis for the further research on micromechanics of HTPB propellant.

关 键 词：AL HTPB粘接 内聚力模型 I型断裂 双悬臂梁试验 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]