A study of dynamic fatigue characteristics of cemented granular materials

• Main Authors: CHENG, CHENG-WEN, 鄭証文
• Other Authors: Weng, Meng-Chia
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/88882091511095965538

碩士 === 國立高雄大學 === 土木與環境工程學系碩士班 === 104 === This study explored on the mechanical properties of cement particulate material in the dynamic fatigue test.The experiments are based on dynamic fatigue tests, and are using by round aluminum rods as basic particles. To study the change of strength and strain in different microscopic structure (arrange, particle size distribution).To understand the change in the overall of deformation field is during the sample digital image correlation analysis of specimen.The results of the dynamic fatigue test and strain analysis showed that: (1) At the same frequency, 50% of the peak strain is less than 75% of the peak strain strength. But the results through normalized stress, the 50% of the peak strain weakness level are less than 75% of peak strain.(2) at the different frequencies (0.01Hz and 1Hz) and in the same peak strain, The low-frequency of sample strength is lower than high-frequency. However,after the sample strength normalized, the low-frequency is higher than high-frequency.(3) 50% of the peak strain in the row model of strength : closely > random > mixed；75% of the peak strain in the row model of strength: closely > mixed > random.