ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In an incremental crack extension analysis each crack increment is in general modelledwith a straight extension. In order to avoid introduction of an error when the local crack growthcriterion is used with an incremental formulation, each straight crack extension would have to beinfinitesimal as the crack growth direction changes when the crack grows. A correction procedure tocorrect the extension direction of the increment can however be applied to ensure that a uniquecrack path is achieved with different analyses of the same problem performed with different size ofthe crack-extension increments. A proposed correction procedure and an reference correctionprocedure are demonstrated by solving a computational crack growth example. The demonstrationshows that analyses of the crack path performed with big crack extensions and the proposed crackcorrection procedure are in excellent agreement with analyses of the crack path performed with verysmall crack extensions. Furthermore it is shown that the reference correction procedure has atendency to overcorrect the crack growth direction if the stop criterion for the iterative correctionprocedure is not specified for each new crack growth analysis
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.89.pdf
