摘要
试验得到在EXCO溶液中预腐蚀不同时间的LC4CS光滑试件的腐蚀表面轮廓线和剩余疲劳寿命。分析了预腐蚀剩余寿命和断口附近轮廓线分形维数随预腐蚀时间的变化规律,针对该规律选取分形维数为预腐蚀剩余寿命损伤参量。试验结果表明:断口附近腐蚀表面轮廓线的分形维数受腐蚀形貌分散性的影响较小,与剩余寿命呈线性关系且与载荷无关,由分形维数计算得到的剩余寿命处于二倍分散带之内。
Several smooth specimens of aluminum alloy LC4CS soaked in EXCO solution for dif- ferent time were measured to obtain corrosion surface profiles and then tested to obtain residual life. The relationship between pre--corrosion residual life and fractal dimension of profile near fracture for different pre--corrosion time were discussed. Fractal dimension was selected as pre--corrosion dam- age parameter on residual life. The results show that fractal dimension of corrosion surface profile near fracture is influenced little by dispersion of corrosion surface, and there is a linear relationship between fractal dimension and residual life, which is not related with loading. The residual lives cal- culated by fractal dimensions are in twice scatter band.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2013年第17期2337-2340,共4页
China Mechanical Engineering
基金
江苏省"青蓝工程"科技创新团队资助项目(1001-YPB11001)
江苏高校优势学科建设工程资助项目
关键词
预腐蚀
损伤参量
分形维数
剩余寿命
pre-- corrosion
damage parameter
fractal dimension
residual life
