A Study on Fatigue Crack Growth in A5083P-O

• Main Authors: Huange, S.W, 黃聖文
• Other Authors: C.H.Lin
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/95192106064467181715

碩士 === 國立成功大學 === 造船工程學系 === 85 === More and more ships of aluminum alloy are built laterly. The fatigue fracture of aluminum alloy is weaker than steel, so avoiding fatigue fracture of aluminum alloy between the usage life is one of the major job in designing marine structure strength. The study concerns fatigue crack growth of aluminum alloy under different load. Firstly, we research the influence of the effective stress intensity, stress ratio and loading amplitude. Secondly, experiments on different sheet are described which confirm the occurrence of fatigue crack closure. Thirdly, a single overload was found to cause retardation of the crack growth rate. In this, we also give a briefing. Lastly, using inverse transform method a series of random loading is simulated which can be used as the input loading of fatigue tests and comparing the analysis methods of Elber and Jono. At least, we provide the results of the fatigue tests and applicable estimate method. Take the results to prove the fatigue fracture designing norms of aluminum alloy for the usage of researchers and designers.