The stress-strain relation for an aging material is obtained from an analysis of a four-element model of a viscoelastic body with variable coefficients. In this formulation the problem of calculating the rupture life is divided into four steps: a) solution of the boundary-value problem of the theory of elasticity of an incompressible material; b) calculation of the stationary thermal field; c) solution of the rheological equation at the danger point; d) solution of the criterial equation for the local fracture time. An example of the calculation of the high-temperature rupture life of a rubber cord under constant load is given. The agreement with experiment is satisfactory.
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Lavendel, É.É., Maslennikov, V.G. Calculation of the rupture life of mechanical rubber goods. Polymer Mechanics 12, 74–78 (1976). https://doi.org/10.1007/BF00857203
- Thermal Field
- Local Fracture
- Fracture Time
- Aging Material