Stress intensity factors for double-beam model central crack problems

✍ Scribed by Chun-Yuan Zhang

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 115 KB
• Volume: 16
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(82)90070-4

✦ 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).