On the time-dependent Gi-KI relationships for viscoelastic cracked bodies
✍ Scribed by Chun-Yuan Zhang
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 115 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0013-7944
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✦ Synopsis
As is shown in our previous work, the energy release rates for viscoelastic bodies are equal to the rates of crack-closure energy. By using the solution for the e~~ck-border stress and displacement fields of viscoelastic solids, the time dependent G,-Ki relationships for viscoelastic cracked bodies are derived from the computation of the rates of crack-closure energy. The main conclusions are as follows: (1) The Gr-I(, relationships for viscoelastic cracked bodies are time-dependent. The energy release rate for viscoelastic cracked body can be obtained by multiplying the energy release rate of the corresponding elastic cracked body by a certain time-factor. (2) The time-factors of the energy release rates are the products of the time-factors of stresses (or stress intensity factors) and the time-factors of displacements. (3) Time-factors of the energy release rates are different from each other between cracked bodies of different rheological models, different stress states (plane stress. plane strain or anti-plane-strain) and different boundary conditions (fixed load or fixed displacement).