Weight functions from finite element displacements

• Type: Article in International Scientific Journal
• Date: 1998

Authors

Pastrama, SD (Author) Other; Paulo Tavares de Castro (Author) FEUP

Journal

Title: International Journal of Pressure Vessels and Piping

Vol. 75

Pages: 229-236

ISSN: 0308-0161

Publisher: Elsevier

Indexing

Scopus - 11 Citations

Other information

Authenticus ID: P-007-82D

Abstract (EN): The weight function method has been extensively used in fracture mechanics for stress intensity factor determination. It was shown that, if a complete solution (the crack face displacement and the stress intensity factor) to a crack problem for one loading system is known, then the solution for the stress intensity factor for the same cracked configuration, but with any other loading, may be obtained directly from the known solution. Several procedures have been proposed, which use a solution for the stress intensity factor available from handbooks. In this paper, an approach based on the crack face displacements obtained from a finite element analysis is used. This procedure can be applied without knowing a previous solution for a certain loading. The method proves to be extremely efficient, and some results and generalisations for a pressurised cylindrical shell with an external straight axial crack are presented.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8