Abstract
This paper provides two types of engineering J estimation equations for cylinders with finite internal axial surface cracks under internal pressure. The first type is the so-called GE/EPRI type J estimation equation based on Ramberg-Osgood (R-O) materials. Based on detailed 3-D FE results using deformation plasticity, plastic influence functions for fully plastic J components are tabulated for practical ranges of the mean radius-to-thickness ratio, the crack depth-to-length ratio, the crack depth-to-thickness ratio, the strain hardening index for the R-O material, and the location along the semi-elliptical crack front. Based on tabulated plastic influence functions, the GE/EPRI-type J estimation equation along the crack front is proposed and validated for R-O materials. For more general application, for instance, to general stress-strain laws, the developed GE/EPRI-type solutions are then re-formulated based on the reference stress concept. Such a re-formulation provides a simpler equation for J, which is then further extended to combined internal pressure and bending. The proposed reference stress based J estimation equation is compared with elastic-plastic 3-D FE results using actual stress-strain data for a Type 304 stainless steel. Good agreement between the FE results and the proposed reference stress based J estimation provides confidence in the use of the proposed method for elastic- plastic fracture mechanics of pressurised piping.
| Original language | English |
|---|---|
| Pages (from-to) | 925-944 |
| Number of pages | 20 |
| Journal | Engineering Fracture Mechanics |
| Volume | 71 |
| Issue number | 7-8 |
| DOIs | |
| Publication status | Published - 2004 Jan 1 |
| Externally published | Yes |
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Keywords
- Deformation plasticity
- Finite element analysis
- Finite internal axial surface crack
- J estimation
- Reference stress
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Elastic-plastic fracture mechanics method for finite internal axial surface cracks in cylinders. / Kim, Yun Jae; Kim, Jin Su; Park, Young Jae; Kim, Young Jin.
In: Engineering Fracture Mechanics, Vol. 71, No. 7-8, 01.01.2004, p. 925-944.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Elastic-plastic fracture mechanics method for finite internal axial surface cracks in cylinders
AU - Kim, Yun Jae
AU - Kim, Jin Su
AU - Park, Young Jae
AU - Kim, Young Jin
PY - 2004/1/1
Y1 - 2004/1/1
N2 - This paper provides two types of engineering J estimation equations for cylinders with finite internal axial surface cracks under internal pressure. The first type is the so-called GE/EPRI type J estimation equation based on Ramberg-Osgood (R-O) materials. Based on detailed 3-D FE results using deformation plasticity, plastic influence functions for fully plastic J components are tabulated for practical ranges of the mean radius-to-thickness ratio, the crack depth-to-length ratio, the crack depth-to-thickness ratio, the strain hardening index for the R-O material, and the location along the semi-elliptical crack front. Based on tabulated plastic influence functions, the GE/EPRI-type J estimation equation along the crack front is proposed and validated for R-O materials. For more general application, for instance, to general stress-strain laws, the developed GE/EPRI-type solutions are then re-formulated based on the reference stress concept. Such a re-formulation provides a simpler equation for J, which is then further extended to combined internal pressure and bending. The proposed reference stress based J estimation equation is compared with elastic-plastic 3-D FE results using actual stress-strain data for a Type 304 stainless steel. Good agreement between the FE results and the proposed reference stress based J estimation provides confidence in the use of the proposed method for elastic- plastic fracture mechanics of pressurised piping.
AB - This paper provides two types of engineering J estimation equations for cylinders with finite internal axial surface cracks under internal pressure. The first type is the so-called GE/EPRI type J estimation equation based on Ramberg-Osgood (R-O) materials. Based on detailed 3-D FE results using deformation plasticity, plastic influence functions for fully plastic J components are tabulated for practical ranges of the mean radius-to-thickness ratio, the crack depth-to-length ratio, the crack depth-to-thickness ratio, the strain hardening index for the R-O material, and the location along the semi-elliptical crack front. Based on tabulated plastic influence functions, the GE/EPRI-type J estimation equation along the crack front is proposed and validated for R-O materials. For more general application, for instance, to general stress-strain laws, the developed GE/EPRI-type solutions are then re-formulated based on the reference stress concept. Such a re-formulation provides a simpler equation for J, which is then further extended to combined internal pressure and bending. The proposed reference stress based J estimation equation is compared with elastic-plastic 3-D FE results using actual stress-strain data for a Type 304 stainless steel. Good agreement between the FE results and the proposed reference stress based J estimation provides confidence in the use of the proposed method for elastic- plastic fracture mechanics of pressurised piping.
KW - Deformation plasticity
KW - Finite element analysis
KW - Finite internal axial surface crack
KW - J estimation
KW - Reference stress
UR - http://www.scopus.com/inward/record.url?scp=0346785393&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0346785393&partnerID=8YFLogxK
U2 - 10.1016/S0013-7944(03)00159-0
DO - 10.1016/S0013-7944(03)00159-0
M3 - Article
AN - SCOPUS:0346785393
VL - 71
SP - 925
EP - 944
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
SN - 0013-7944
IS - 7-8
ER -