SYMPOSIA PAPER Published: 01 January 1988
STP33099S

Line Spring Method of Stress-Intensity Factor Determination for Surface Cracks in Plates Under Arbitrary In-Plane Stresses

Source

The elastic line spring model is updated to accept arbitrarily distributed loads acting on plates to allow determination of stress-intensity factors of surface cracks under various types of loading, such as thermal stress and residual stress. The governing integral equations are modified, owing to the inclusion of the nonlinear loads. Careful numerical treatment and computer programming can make the analysis very efficient. It has been shown that a 16-point KI-distribution along a crack front can be obtained within 0.025 s (central processing unit) using Cray computer systems, which is at least four orders of magnitude faster than the finite-element analysis of the same problem. The outstanding computational efficiency makes the line spring model practical for many time-dependent fracture analyses in engineering applications.

Cracks with different shapes, namely, semielliptical, part-circular, and triangular cracks are investigated, and the results agree very well with the existing finite-element analysis solutions.

Author Information

Yang, CY
Westinghouse Electric Corp., Nuclear Energy Systems, Pittsburgh, PA
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E08
Pages: 657–668
DOI: 10.1520/STP33099S
ISBN-EB: 978-0-8031-5041-6
ISBN-13: 978-0-8031-0972-8