Abstract
This paper is concerned with the steady-state propagation of an antiplane semi-infinite crack in couple stress elastic materials. A distributed loading applied at the crack faces and moving with the same velocity of the crack tip is considered, and the influence of the loading profile variations and microstructural effects on the dynamic energy release rate is investigated. The behavior of both energy release rate and maximum total shear stress when the crack tip speed approaches the critical speed (either that of the shear waves or that of the localized surface waves) is studied. The limit case corresponding to vanishing characteristic scale lengths is addressed both numerically and analytically by means of a comparison with classical elasticity results. (C) 2014 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 3087-3100 |
| Number of pages | 14 |
| Journal | International Journal of Solids and Structures |
| Volume | 51 |
| Issue number | 18 |
| Early online date | 15 May 2014 |
| DOIs | |
| Publication status | Published - Sept 2014 |
Keywords
- Couple stress elasticity
- Energy release rate
- Couple stress surface waves
- Shielding e ffects
- Weakening effects
- MODE-III CRACK
- HETEROGENEOUS MATERIALS
- GRADIENT ELASTICITY
- INTENSITY FACTORS
- FRACTURE ENERGY
- SIZE
- DEPENDENCE
- SOLIDS
- WAVES