Research on the Mechanical Characteristics of Cyclic Loading and Unloading of Rock Based on Infrared Thermal Image Analysis

Table 2

Cycle test scheme and related results.

Sample no.	Cycles	Loading and unloading range ratio (%)	Uniaxial compressive strength (MPa)	Elastic modulus (GPa)
B-11	5	12	190.4	74.7
B-12	5	12	189.4	74.31
B-13	5	12	195.3	76.32
B-21	10	12	195.3	78.8
B-22	10	12	194.7	78.61
B-23	10	12	193.6	75.43
C-11	5	24	183.4	73.15
C-12	5	24	185.7	77.84
C-13	5	24	187.6	75.36
C-21	10	24	180.8	67.69
C-22	10	24	180.9	69.07
C-23	10	24	185.3	69.87
D-11	5	36	177.0	63.95
D-12	5	36	175.2	61.25
D-13	5	36	179.6	67.27
D-21	10	36	174.8	62.45
D-22	10	36	173.9	62.84
D-23	10	36	171.3	61.89
E-11	5	48	164.8	62.04
E-12	5	48	160.2	60.32
E-13	5	48	167.9	58.64
E-21	10	48	163.4	57.23
E-22	10	48	154.6	53.41
E-23	10	48	159.9	55.5
F-11	5	60	156.7	50.36
F-12	5	60	152.2	51.02
F-13	5	60	155.3	59.11
F-21	10	60	144.9	54.31
F-22	10	60	153.1	49.36
F-23	10	60	140.5	47.25