摘要
建立了铝合金板单搭接胶接接头的三维弹性有限元模型,通过与G-R解析模型的胶层剪应力和剥离应力分布对比分析,验证了有限元模型的有效性。经有限元仿真拟合铝合金板单搭接胶接接头静拉伸试验的载荷-位移曲线,获得了胶层Ⅰ/Ⅱ型混合失效模式下内聚力单元的断裂参数值和胶层渐进破坏的过程,将胶层内聚力单元断裂参数值应用于含双裂纹复合材料胶接修补结构中,预测了修补结构的静拉伸强度。结果表明,有限元模型预测的剩余强度与实验值的相对误差为3.8%,因此运用内聚力单元仿真胶层的方法是有效的,并为复合材料胶接修补结构的承载能力分析提供了有力的依据。
A three dimensional and elastic finite element model for adhesive bonded single lap joint of aluminum alloy by using cohesive zone model was established,which was proved to be valid by comparing with the shear stress and peel stress distribution of the adhesive layer in G-R analysis model. By simulating the tension test and fitting the load-displacement curves,the fracture parameters of adhesive cohesive zone model were obtained,which were then applied to predict the residual strength of adhesively bonding composite repaired structures with double-edge cracks. The results show that the relative error between the prediction and the experiment is 3. 8%,which proves the validity and high accuracy of the method. It＇s helpful for carrying capacity＇s analysis of adhesively bonding composite repaired structures.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2016年第12期60-64,共5页
Fiber Reinforced Plastics/Composites
关键词
胶层
内聚力模型
断裂参数
复合材料胶接修补
剩余强度
adhesive
cohesive zone model
fracture parameters
adhesively bonding composite repair
residual strength
