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Effect of internal pressure on plastic loads of 90 degrees elbows with circumferential part-through surface cracks under in-plane bending
- Issue Date
- 3월-2010
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Circumferential crack; Combined pressure and in-plane bending; Elbow; Finite element limit analysis; Plastic load
- Citation
- ENGINEERING FRACTURE MECHANICS, v.77, no.4, pp.577 - 596
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENGINEERING FRACTURE MECHANICS
- Volume
- 77
- Number
- 4
- Start Page
- 577
- End Page
- 596
- ISSN
- 0013-7944
- Abstract
- This paper quantifies the effect of internal pressure on plastic loads for elbows with circumferential through-wall and constant-depth part-through surface cracks under in-plane bending. Results are based on FE limit analyses using elastic-perfectly plastic materials and the non-linear geometry option. It is found that, for larger values of r/t, the pressure effect on plastic loads is more pronounced and plastic loads for combined loading cases could be much higher than those for pure bending cases. Full FE data of plastic loads are tabulated, and effects of crack geometries on interaction curves are discussed. (C) 2009 Elsevier Ltd. All rights reserved.
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