Accession Number:

AD1003973

Title:

Virtual Crack Extension Technique

Descriptive Note:

Technical Report

Corporate Author:

Martec Limited Halifax, Nova Scotia Canada

Personal Author(s):

• Shahin,Khaled
• Koko,Tamunoiyala

Report Date:

2008-12-01

Pagination or Media Count:

40.0

Abstract:

In order to numerically calculate the strain energy release rate SERR using finite element models, an implementation of the virtual crack extension technique was developed within a Matlab script. From the nodal data read in from the ascii output files produced by LS-Dyna, the SERR was calculated from contours of elements which were positioned around the crack tip. In order to validate the implementation, a mesh sensitivity study of a center cracked panel was carried out. This study concluded that the SERR implementation was relatively independent of mesh size and shape.

Descriptors:

• CRACKING(FRACTURING)
• FRACTURE(MECHANICS)
• J INTEGRALS
• cracks
• energy
• stresses
• LOADS(FORCES)
• ELASTIC PROPERTIES
• STRAIN(MECHANICS)
• CRACK PROPAGATION
• mesh

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE