Finite Element Studies of Steel Cantilever Beam UnderHigh Frequency Fatigue

• Main Authors: Nguyen CongHai, 阮功海
• Other Authors: Yun-Che Wang
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/28563479224910865056

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 100 === Fatigue is an important engineering problems in materials. High frequency fatigue is an increasing concern in modern society due to engineering applications of high-speed trains and such. In order to analyze and predict fatigue, this thesis focuses on the preliminary work to study high-frequency fatigue with the abaqus finite element commercial software. In this thesis, (1) the explicit and implicit dynamics finite element studies were performed under concentrated and surface loading to demonstrate the differences in the methods of analysis. (2) fatigue crack propagation problems were simulated with the finite element to demonstrate the capability of the abaqus in simulating the fatigue problems. (3) Plasticity is incorporated in the finite element studies to show model damage accumulations. Since the thermoelastic effects are not included in the present analysis, high-frequency effects are not reflected in the results of the current study. Furthermore, the microstructural effects are not considered. The above mentioned two key ingredients must be included in the future work to realistically predict high-frequency fatigue.