Competition between brittle fracture and plastic collapse in the failure of thin rectangular panels
✍ Scribed by A. Bacci; S. Ligarò
- Publisher
- Springer Netherlands
- Year
- 1996
- Tongue
- English
- Weight
- 627 KB
- Volume
- 77
- Category
- Article
- ISSN
- 1573-2673
No coin nor oath required. For personal study only.
✦ Synopsis
A centre-cracked panel of elastic-plastic material of unit thickness is loaded remotely by an uniaxial traction acting along its longitudinal axis. Making use of the Dugdale-Barenblatt model, the size w of the plastic zones ahead of the crack tips can be obtained by equilibrium considerations. Connected to w, a genera[ised elasticplastic stress intensity factor 1,5 is defined which, as ~ --~ 0, approaches the ordinary elastic one. Once the critical values ~.,, or l~'c at the onset of the unstable propagation of the crack have been specified, the residual-strength curves for plane stress state can be easily deduced. Moreover, conditions are sought lbr which ductile fracture, brittle fracture or plastic collapse takes place.