风沙冲击作用下钢结构表面涂层与基体界面应力研究  

INTERFACE STRESS BETWEEN STEEL SURFACE COATING AND SUBSTRATE UNDER THE SAND SHOCK

作　　者：郝贠洪[1] 朱敏侠[1] 冯玉江[1] 任莹[1] 段国龙[1] 

机构地区：[1]内蒙古工业大学土木工程学院,呼和浩特010051

出　　处：《固体力学学报》2014年第5期485-492,共8页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金项目(11162011);内蒙古自治区自然科学基金项目(2009MS0706)资助

摘　　要：在应用接触力学分析风沙冲击钢结构表面涂层的动力基础上,应用界面力学镜像点法分析涂层基体界面应力,并计算分析风沙冲击作用下涂层与钢结构界面应力.分析结果表明:界面正应力随着冲击速度的增大而增大,界面正应力在冲击点附近较大,越远离冲击点越小,在冲击点处,界面正应力随着冲击角度的增大而增大,90°时达到最大,当离冲击点有一定距离时,界面正应力在45°时达到最大.界面剪应力也随着冲击速度的增大而增大,且界面剪应力在冲击角度为30°时达到最大值,界面剪应力在离冲击点距离x=1mm的界面处,界面剪应力达到最大值,当x<1mm时,界面剪应力随着x的增大而增大,当x>1mm时,界面的剪应力随着x的增大而减小.By employing contact mechanics and the mirror point method of interface mechanics,interfacial stress between steel surface coating and substrate under the sand shock was analyzed.Results indicate that：（1）the interface normal stress between steel surface coating and substrate increases with impact velocity;（2）for given impact velocity and angle,the interfacial stress is highest in the vicinity of the impact point and decreases gradually away from the impact point;（3）for a given impact velocity,at the impact point,the interface normal stress increases with increasing impact angle of sand and reaches a maximum at 90°impact angle,however,at those points away from the impact point,the interface normal stress reaches its maximum at 45°impact angle.In addition,the interface shear stress increases with increasing impact velocity.The interface shear stress reaches a maximum at 30°impact angle.The maximum of interface shear stress presents at the point 1mm away from the impact point.

关 键 词：风沙冲击 涂层基体 接触动力 界面应力 

分 类 号：O343.3[理学—固体力学]