WAVEFORM EFFECT ON PRE-AND POST-FAILURE FATIGUE PROPERTIES OF SANDSTONE
The effect of loading waveform on the pre- and post- failure fatigue properties of sandstone subjected to uniaxial cyclic loading was investigated. The sinusoidal, ramp and square waveforms were used at cyclic loading frequency of 5Hz and peak amplitude of 0.05 mm. The loading waveform was found to be of the great significance and affected the fatigue behaviour. Fatigue behaviour was found to be a function of the dynamic energy of the load and the shape of the waveform. Damage accumulateed most rapidly under square waveforms with a high energy requirement. A ramp waveform was the least damaging of those considered. This study has practical significance in understanding the behaviour of rock and rock masses within the excavation systems subjected to dynamic cyclic loads.
MANOJ NAMDEO BAGDE VLADIMIR PETROS
Central Institute of Mining and Fuel Research, Regional Center, MECL, Nagpur 440 006, India Faculty of Mining and Geology, VSB-TU, Ostrava 70833, Czech Republic
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
407-414
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）