Uniform arrays of unequal-depth cracks in thiok-walled cylindrical pressure vessels-part I: Stress intensity factors evaluation

M. Perl, K. H. Wu, R. Aroné

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The influence of the unevenness of crack lengths on the mode I stress intensity factors (SIF) for large uniform arrays of radial cracks of unequal depth in thickwalled pressurized cylinders is investigated applying the previously proposed “twocrack-length level model.” Using the finite element method, SIFs are evaluated for numerous configurations of crack arrays bearing a wide range of crack lengths. The interaction range for various combinations of crack arrays and crack lengths is then determined. The numerical results anticipate that any statistical unevenness of the initial crack lengths, prevailing in the pressurized cylinder, will be amplified during the process of fatigue crack growth. Thus, while the fatigue life of the vessel is determined by a large number of cracks, its final failure, which is governed by a small number of the largest cracks, is likely to be caused by one major crack, as is usually the case. This sequence of events results from the particular nature of the inter-crack stress field, which is analyzed and discussed in detail in Part II of the paper.

Original languageEnglish
Pages (from-to)340-345
Number of pages6
JournalJournal of Pressure Vessel Technology, Transactions of the ASME
Volume112
Issue number4
DOIs
StatePublished - 1 Jan 1990
Externally publishedYes

Fingerprint

Dive into the research topics of 'Uniform arrays of unequal-depth cracks in thiok-walled cylindrical pressure vessels-part I: Stress intensity factors evaluation'. Together they form a unique fingerprint.

Cite this