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2. Contact mechanics of polymers
2.1 Rheological properties of polymers
Figure 5 shows the stress σ - strain ε curves of various polymers: they generally comprise three parts:
an initial phase of strongly increasing stress, corresponding to small elastic and viscoelastic deformations, which disappear rapidly after the specimen has been discharged; to a first approximation, this range is characterized by the slope of the curve, which can be identified with the Young's modulus E, whose value depends on the deformation imposed on the...
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