Weight functions for an external longitudinal semi-elliptical surface crack in a thick-walled cylinder

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Journal of Pressure Vessel Technology

DOI:https://doi.org/10.1115/1.2842270· OSTI ID:442847

Kiciak, A; Glinka, G; Burns, D J ^[1]

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1. Univ. of Waterloo, Ontario (Canada). Dept. of Mechanical Engineering

Mode I weight functions were derived for the deepest and surface points of an external radial-longitudinal semi-elliptical surface crack in a thick-walled cylinder with the ratio of the internal radius to wall thickness, R{sub i}/t = 1.0. Coefficients of a general weight function were found using the method of two reference stress intensity factors for two independent stress distributions, and from properties of weight functions. Stress intensity factors calculated using the weight functions were compared to the finite element data for several different stress distributions and to the boundary element method results for the Lame hoop stress in an internally pressurized cylinder. A comparison to the ASME Pressure Vessel Code method for deriving stress intensity factors was also made. The derived weight functions enable simple calculations of stress intensity factors for complex stress distributions.

• Sponsoring Organization: Natural Sciences and Engineering Research Council of Canada, Ottawa, ON (Canada)
• OSTI ID: 442847
• Journal Information: Journal of Pressure Vessel Technology, Journal Name: Journal of Pressure Vessel Technology Journal Issue: 1 Vol. 119; ISSN JPVTAS; ISSN 0094-9930
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CRACK PROPAGATION
CRACKS
FATIGUE
FRACTURE MECHANICS
PRESSURE VESSELS
STRESS INTENSITY FACTORS
WEIGHTING FUNCTIONS