基于反演优化算法的钢丝-热熔胶黏结界面失效行为研究

Study on Failure Behavior of Steel Wire-Adhesive Resin Interface Based on Inverse Optimization Algorithm

钢丝缠绕增强塑料复合管(PSP)综合性能优异,在石油、化工、供水等行业得到广泛应用。但在高温高压极端环境下,管材内部钢丝与热熔胶之间发生界面脱黏失效。为研究钢丝-热熔胶黏结界面失效行为,文章进行单钢丝/热熔胶试样的拉拔试验,建立与试验加载过程相一致的单钢丝拉拔有限元模型。基于内聚力理论模拟钢丝-热熔胶的黏结作用,依据反演优化计算思想,开发了ABAQUS-Python-MATLAB交互程序,实现每一轮拉拔力-位移计算曲线与试验曲线自动比对与界面参数的持续优化。通过反演得到的内聚力参数代入不同钢丝埋深的拉拔模型,其拉拔力峰值与对应位移的计算结果与试验结果良好吻合,反演所得参数可真实反映钢丝-热熔胶黏结作用。

The steel wire winding reinforced plastic composite pipe(PSP)has excellent comprehensive performance and has been widely used in petroleum,chemical industry,water supply and other industries.However,in the extreme environment of high temperature and high pressure,the interface debonding failure occurs between the steel wire inside the pipe and the hot melt adhesive.In order to study the failure behavior of the bonding interface between steel wire and hot melt adhesive,the paper conducted a single steel wire/hot melt adhesive sample drawing test,established a single steel wire drawing finite element model consistent with the test loading process.Based on the cohesion theory to simulate the bonding effect between steel wire and hot melt adhesive,an ABAQUS-Python-MATLAB interactive program was developed according to the inverse optimization calculation concept,to achieve automatic comparison between each round of tensile force-displacement calculation curves and experimental curves,as well as continuous optimization of interface parameters.The inversion cohesion parameters were substituted into the drawing models with different buried depths.The calculation results of the peak value of the drawing force and the corresponding displacement were in good agreement with the test results.The inversion parameters can reflect the bonding effect of the wire and hot melt adhesive.