Elasto-plastic analysis of a cracked ductile cylindrical pressure vessel

The deformation of a long cylindrical pressure vessel made of strain hardening material with a long longitudinal crack is analyzed under internal pressure by an FEM code. Stress distributions, the shape of the crack opening, the plastic zone, the J-integral and the CTOD are calculated. The J CTOD ra...

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Bibliographic Details
Published in:The International journal of pressure vessels and piping 1983, Vol.13 (3), p.169-182
Main Authors: Ranta-Maunus, Alpo, Talja, Heli
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fractures
Fundamental areas of phenomenology (including applications)
Materials science
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals, semimetals and alloys
Metals. Metallurgy
Physics
Solid mechanics
Specific materials
Structural and continuum mechanics
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Summary:The deformation of a long cylindrical pressure vessel made of strain hardening material with a long longitudinal crack is analyzed under internal pressure by an FEM code. Stress distributions, the shape of the crack opening, the plastic zone, the J-integral and the CTOD are calculated. The J CTOD ratio is found to be practically independent of the amount of pressure load, as well as of the crack height. Comparisons are made with a fully plastic strip yield model which seems to give a reasonable estimate of crack opening. This model suggests that the CTOD is linearly dependent on the radius of cylinder. This implies that the size of the pressure vessel is an important parameter when considering the tolerance of flaws.
ISSN:0308-0161
1879-3541
DOI:10.1016/0308-0161(83)90054-6