Stress intensity factor calculations of an internal radial edge crack in a cylindrical tube using quarter-point finite-element analysis with J-integral techniques

Technical Report · Wed Feb 01 04:00:00 EST 1978

OSTI ID:5210875

Kan, Y R

The stress intensity factors, K/sub I/, and compliances for an internal radial crack in a cylindrical tube subjected to a uniform internal pressure and external loading conditions are calculated using the quarter-point finite element analysis and J-integral techniques. The results are graphically presented as a function of crack length. Under a uniform internal pressure, the K/sub I/ obtained by this analysis agrees with the ''exact'' K/sub I/ calculated by a closed form solution with 1.5 percent. An unexpected result was that K/sub I/ reached a maximum before the crack reached the outer wall for the case of a pair of collinear external forces applied in the direction of the radial crack. The magnitude and the location where the peak K/sub I/ occurs, was verified by a simplified curved beam model.

• Research Organization: Sandia Labs., Livermore, Calif. (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 5210875
• Report Number(s): SAND-77-8290
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420200* -- Engineering-- Facilities
Equipment
& Techniques
CRACKS
FINITE ELEMENT METHOD
FRACTURE PROPERTIES
MATHEMATICS
MECHANICAL PROPERTIES
NUMERICAL ANALYSIS
NUMERICAL SOLUTION
STRESS ANALYSIS
TUBES