Page 382 - Handbook of Properties of Textile and Technical Fibres

Structure and behavior of collagen fibers 355

120
100

Stress (MPa) 80
60

40

20
0
0 0.05 0.1 0.15 0.2 0.25 0.3
Strain
Figure 11.7 Total, elastic and viscous stressestrain curves for rat tail tendon fibers obtained
after incremental stressestrain testing in uniaxial tension. This figure shows that the elastic
stressestrain curve (squares) is approximately linear with strain and is above the viscous curve
(triangles). This diagram illustrates that more energy is stored during tensile deformation of
tendon than is dissipated as heat during stretching.

Table 11.1 Estimated elastic moduli for collagen based on elastic
stress measurements for various ECMs
Molecule Tissue Elastic modulus (GPa)

Type I Self-assembled 6.51
Rat tail tendon 7.69
Turkey tendon 4.20 (no mineral)
7.22 (mineral 0.245)
Types I and III Skin 4.4
Type II Articular cartilage 7.0 (surface parallel)
2.21 (surface perpendicular)
4.91(whole parallel)
1.52 (whole perpendicular)
Osteoarthritic cartilage 0.092 (whole perpendicular)
Elastin Skin 0.040
Vessel wall 0.01