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• Main Authors: Yaw-Tzoung Lee, 李耀宗
• Other Authors: Jiun-Ren, Hwang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/95739806014410216943

碩士 === 國立中央大學 === 機械工程研究所 === 94 === This thesis investigates low cycle fatigue properties and fatigue life prediction model of solid propellant. In addition to the constant strain amplitude fatigue test, the spectrum fatigue test of solid propellant was performed. The present fatigue life prediction model is strain based. Effects of strain ratio (R) and cycle counting method on the predicted life were studied. The author obtains the cyclic stress-strain equation and strain-life equation of solid propellant in this study. When the solid propellant under spectrum loading, the best fatigue life prediction model is the strain-life model combined Morrow mean stress correction with rainflow histogram cycle counting method. From the analysis of fractographs, it is seen that many solid grains peel off the matrix on facture surface in R= -1 spectrum fatigue test. While the fracture mechanism changes into split in R = 0.5 spectrum fatigue.