EndoFEM/FCP Studies on AISI-1005 Steel SEN Specimens under Various Stress Ratios

• Main Authors: Teng, Jeng Yang, 鄧晶淵
• Other Authors: Lee C. F.
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/63656711354069609780

碩士 === 國立成功大學 === 工程科學系 === 86 === The concept of crack opened load(Pop) in crack closure models plays an important role on the behavior of fatigue crack growth. After the determi-nation of Pop values, one can study the growth rate of crack and hence eva-luate the fatigue life. In this report, AISI-1005 Mild steel SEN specimen with fatigue crack undercyclic loading of various stress ratios are studied by EndoFEM.By using a node-released method, one can simulated crack growth induced plastic wake.The results of Pop determined by EndoFEM method are then to find the functionof U. To find the growth rate of crack, this report using the Kumar of datas. Through integer of equation can be find the a-N curve, and almost close tothe experiment of data then Kumar's. These results of EndoFEM provide goodpredicative capabilities in the studies of behavior of fatigue crack growth.