Experimental Study on Creep Characteristics of Microdefect Articular Cartilages in the Damaged Early Stage

Table 1

Parameters of the creep equation under the condition of different damage depths.

Location	Damage depth (mm)	E1 (MPa)	E2 (MPa)	Time constant
Point A; (surface layer)	0	6.23	7.24	888
	0.2	4.47	8.61	873
	0.7	3.86	9.7	770
	1.1	3.86	7.24	770
Point B; (middle layer)	0	8.66	8.4	1185
	0.2	5.32	10.83	1210
	0.7	4.63	9.39	975
	1.1	3.99	6.55	898
Point C; (deep layer)	0	10.59	9.18	922
	0.2	6.08	14.21	994
	0.7	5.29	13.21	994
	1.1	4.65	11.68	1009