Lyapunov Exponent-Based Study of Chaotic Mechanical Behavior of Concrete under Compression

Table 2

Coefficients of linear evolution equations.

	Ascending		Descending
	Slope	Intercept	Slope	Intercept
Measured stress Group 1	1.000014	0.003699	1.000106	−0.007845
Measured stress Group 2	1.000121	0.002308	1.000124	−0.007110
Measured stress Group 3	0.999991	0.003164	0.999902	0.000267
Measured strain Group 1	1.000064	0.018264	1.000161	0.038356
Measured strain Group 2	1.000189	0.009607	1.000232	0.017043
Measured strain Group 3	0.999998	0.015202	1.000013	0.078633
Fitted stress Group 1	0.981863	1.928350	0.973973	−0.531977
Fitted stress Group 2	0.909646	3.978237	0.892836	0.596810
Fitted stress Group 3	0.790530	7.919761	0.965617	−0.075783
Fitted strain Group 1	1.043743	6.194828	—	—
Fitted strain Group 2	1.040320	15.300724	—	—
Fitted strain Group 3	1.026596	15.149465	—	—