摘要
工程薄壁结构长期受到交变载荷作用,产生疲劳裂纹且多为贯穿性裂纹,进而导致修复困难和工程中不能替换问题,因此提出一种涂层技术对薄壁结构修复和止裂。制作与实际工程相关的薄板试验件,并预置裂纹。试验件在振动试验台做1阶弯曲共振状态和基础激励为10g的激励试验,直至出现微裂纹。采用双面喷涂方法对试验件进行NiCrAl涂层和NiCrAl过渡层+ZrO_(2)功能层复合涂层两种涂层设置修复裂纹,并重复激励试验。对比试验件涂层前后的裂纹扩展时间和扩展速率,分析NiCrAl涂层和ZrO_(2)涂层对带裂纹薄板试验件裂纹扩展的影响。验证涂层对薄壁板件的止裂效果。
Due to long-term alternating load,engineering thin-walled structures will produce fatigue cracks,and most of them are penetrative cracks,which will lead to difficult repair and irreplaceable problems in engineering.Therefore,a coating technology is proposed to repair and crack arrest thin-walled structures.Thin plate test pieces related to practical engineering were made,and cracks were preset.The test piece was going to be subjected to the first-order bending resonance state and the excitation test with the foundation excitation of 10 g on the vibration test bench until cracks appear.Two kinds of coatings,NiCrAl coating and NiCrAl transition layer+ZrO_(2) functional layer composite coating,were applied to the test piece by double-sided spraying method to repair the crack,and the excitation test was repeated.Comparing the crack propagation time and propagation rate of the test piece before and after coating,the influence of NiCrAl coating and ZrO_(2) coating on the crack propagation of the thin-walled plate test piece was analyzed.The crack arrest effect of the coating on the thin-walled plate is verified.
作者
姜金德
任云鹏
卢崇劭
朱清玉
张东旭
JIANG JinDe;REN YunPeng;LU ChongShao;ZHU QingYu;ZHANG DongXu(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Shenyang Intelligent Vibration Technology Co.,Ltd.,Shenyang 110000,China;School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《机械强度》
CAS
CSCD
北大核心
2023年第5期1103-1107,共5页
Journal of Mechanical Strength
基金
东北大学航空动力装备振动及控制教育部重点实验室研究基金项目(VCAME202102)资助。
关键词
薄壁结构
涂层
裂纹修复
裂纹止裂
激励试验
Thin wall shell structure
Coating
Crack repair
Coating crack arrest
Excitation test