Aspects of Mechanical Behavior of Rock under Static and Cyclic Loading. Part B. Mechanical Behavior of Rock under Cyclic Loading
Semi-annual rept. 1 Mar-31 Aug 1972
WISCONSIN UNIV-MADISON ENGINEERING EXPERIMENT STATION
Pagination or Media Count:
The mechanical behavior of additional hard rock types under cyclic uniaxial compression and tension was studied, and a program of cyclic triaxial compression testing was initiated. All rocks granite, sandstone, limestone, marble exhibited cyclic fatigue characteristics in both tension and compression with fatigue strengths of 55-70 within 100,000 - 1,000,000 cycles. Prefailed granite exhibited substantial fatigue endurance. An inter-relationship between compression fatigue and the complete stress-strain curve has been demonstrated. For the same maximum stress cyclic stress amplitudes appear to affect fatigue life. In particular, indications are that compression-tension cyclic loading could be most damaging.
- Geology, Geochemistry and Mineralogy