摘要
复合材料加固修复钢结构技术有许多优点和广阔的应用前景,该方法的关键在于保证复合材料补片和钢板的连接界面具有良好的粘接性能。文章为探究粘接界面的力学性能,利用ANSYS软件建立二维线弹性有限元模型,模拟碳纤维增强复合材料(CFRP)单面加固钢板的拉伸试验过程,分析粘接界面的应力分布情况及其变化规律,研究胶层弹性模量,胶层厚度以及CFRP补片厚度对胶层界面应力的影响,为确定最优的加固方案提供理论依据。分析结果表明:胶层端部区域的剪应力和剥离应力随着胶层弹性模量和CFRP补片厚度的增加而增大,适当地增加胶层厚度有利于提高加固效果。
The strengthening method that steel construction reinforced with composite plates has several ad- vantages and widespread engineering application, in which the key point lies in the fine interface performance be- tween steel plate and composite plate. In order to investigate the mechanical properties of bonding interface and provide theoretical basis for the optimal reinforcement project, 2D linear elastic FEM is built up to simulate the tensile test process and the interracial stress of the adhesive layer between the steel plate and CFRP plate is studied through the finite element analysis program ANSYS. The parameters which influence the adhesive stress, such as the elastic modulus of adhesive, thickness of CFRP plate and thickness of adhesive, are studied by FEM in AN- SYS. The analytical results indicate that the shear stress and peel stress on the free end of adhesive gradually in- crease with the increasing of the elastic modulus of adhesive and thickness of CFRP plate. It＇s helpfully to improve the reinforcing effect by increasing the thickness of adhesive layer appropriately.
出处
《中国修船》
2017年第6期43-47,共5页
China Shiprepair
基金
国家自然科学基金(51479206)
关键词
复合材料
单面加固
胶层应力
胶层弹性模量
CFRP补片厚度
胶层厚度
composite
single-sided strengthening
adhesive stress
elastic modulus of adhesive
thickness of CFRP plate
thickness of adhesive
