Abstract
This paper proposes a new ntethod to estimate failure strength of a pipe with local wall thinning. The method is based on the equivalent stress averaged over the minimum ligament in the locally wall thinned region. The highlight of the proposed method is to propose a simple scheme to estimate the equivalent stress in the minimum ligament. Inspired by the reference stress method for approximate creep stress analysis, approximate estimation equations are proposed for the equivalent stress in the minimum ligament, which are then calibrated using detailed elastic-plastic three-dimensional FE analysis. Remarkably the resulting estimation equations are found to be insensitive not only to pipe and defect geometries but also to material. Comparison of failure loads, predicted according to the proposed method, with published test data for corroded pipes shows excellent agreement, which provides confidence in the use of the proposed method to assess local wall thinning in pipes. Furthermore, the proposed method is conceptually simple and thus easy to be extended to more complex situations.
| Original language | English |
|---|---|
| Pages (from-to) | 194-201 |
| Number of pages | 8 |
| Journal | Journal of Pressure Vessel Technology, Transactions of the ASME |
| Volume | 126 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2004 May 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Safety, Risk, Reliability and Quality
- Mechanics of Materials
- Mechanical Engineering
Cite this
Reference stress based approach to predict failure strength of pipes with local wall thinning under single loading. / Kim, Yun Jae; Shim, Do Jun; Lim, Hwan; Kim, Young Jin.
In: Journal of Pressure Vessel Technology, Transactions of the ASME, Vol. 126, No. 2, 01.05.2004, p. 194-201.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Reference stress based approach to predict failure strength of pipes with local wall thinning under single loading
AU - Kim, Yun Jae
AU - Shim, Do Jun
AU - Lim, Hwan
AU - Kim, Young Jin
PY - 2004/5/1
Y1 - 2004/5/1
N2 - This paper proposes a new ntethod to estimate failure strength of a pipe with local wall thinning. The method is based on the equivalent stress averaged over the minimum ligament in the locally wall thinned region. The highlight of the proposed method is to propose a simple scheme to estimate the equivalent stress in the minimum ligament. Inspired by the reference stress method for approximate creep stress analysis, approximate estimation equations are proposed for the equivalent stress in the minimum ligament, which are then calibrated using detailed elastic-plastic three-dimensional FE analysis. Remarkably the resulting estimation equations are found to be insensitive not only to pipe and defect geometries but also to material. Comparison of failure loads, predicted according to the proposed method, with published test data for corroded pipes shows excellent agreement, which provides confidence in the use of the proposed method to assess local wall thinning in pipes. Furthermore, the proposed method is conceptually simple and thus easy to be extended to more complex situations.
AB - This paper proposes a new ntethod to estimate failure strength of a pipe with local wall thinning. The method is based on the equivalent stress averaged over the minimum ligament in the locally wall thinned region. The highlight of the proposed method is to propose a simple scheme to estimate the equivalent stress in the minimum ligament. Inspired by the reference stress method for approximate creep stress analysis, approximate estimation equations are proposed for the equivalent stress in the minimum ligament, which are then calibrated using detailed elastic-plastic three-dimensional FE analysis. Remarkably the resulting estimation equations are found to be insensitive not only to pipe and defect geometries but also to material. Comparison of failure loads, predicted according to the proposed method, with published test data for corroded pipes shows excellent agreement, which provides confidence in the use of the proposed method to assess local wall thinning in pipes. Furthermore, the proposed method is conceptually simple and thus easy to be extended to more complex situations.
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UR - http://www.scopus.com/inward/citedby.url?scp=7444264331&partnerID=8YFLogxK
U2 - 10.1115/1.1687379
DO - 10.1115/1.1687379
M3 - Article
VL - 126
SP - 194
EP - 201
JO - Journal of Pressure Vessel Technology, Transactions of the ASME
JF - Journal of Pressure Vessel Technology, Transactions of the ASME
SN - 0094-9930
IS - 2
ER -