Fig. 3

The results of the in vitro compression tests. a The process of the compression test. b The stress–strain curve of the compression test. c The compression modulus in the three scaffolds. d The toughness in the three scaffolds. e The stress–strain curve of the single-cycle compression at 20% strain. f The dissipative energy for the hysteresis curve. g The curve of the stress-relaxation test. h The relaxation time scale in the three scaffolds. All the tests were repeated for 3 times