The stress analysis and fatigue crack growth behaviour of a part-through-cracked double-curvature thin-walled shell is examined. An external surface crack is assumed to lie in one of the principal curvature planes of the shell, and to present a semi-elliptical shape. The stress intensity factors (SIFs) along the crack front for different elementary opening stresses acting on the crack faces are determined through a three-dimensional finite element analysis. Then approximate values of SIF in the case of a cracked pressure vessel are computed by employing the above results together with the superposition principle and the power series expansion of the actual opening stress. Finally, a numerical simulation procedure is carried out to predict the crack growth under cyclic internal pressure. Some results are compared with those of other authors.

External surface cracks in shells under cyclic internal pressure / A. CARPINTERI; BRIGHENTI R.; A. SPAGNOLI. - In: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES. - ISSN 8756-758X. - 23(2000), pp. 467-476. [10.1046/j.1460-2695.2000.00320.x]

External surface cracks in shells under cyclic internal pressure

CARPINTERI, Andrea;BRIGHENTI, Roberto;SPAGNOLI, Andrea
2000

Abstract

The stress analysis and fatigue crack growth behaviour of a part-through-cracked double-curvature thin-walled shell is examined. An external surface crack is assumed to lie in one of the principal curvature planes of the shell, and to present a semi-elliptical shape. The stress intensity factors (SIFs) along the crack front for different elementary opening stresses acting on the crack faces are determined through a three-dimensional finite element analysis. Then approximate values of SIF in the case of a cracked pressure vessel are computed by employing the above results together with the superposition principle and the power series expansion of the actual opening stress. Finally, a numerical simulation procedure is carried out to predict the crack growth under cyclic internal pressure. Some results are compared with those of other authors.
External surface cracks in shells under cyclic internal pressure / A. CARPINTERI; BRIGHENTI R.; A. SPAGNOLI. - In: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES. - ISSN 8756-758X. - 23(2000), pp. 467-476. [10.1046/j.1460-2695.2000.00320.x]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/1449067
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