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 mechanical engineering, circular hole is used widely in structure design. When thestructure is overloaded or the load is changed regularly, cracks emerge and spread. Based on theformer study of dynamic stress concentration problem of SH wave by a crack originating at acircular hole edge, in this paper, the method of Green’s function is used to investigate the problemof dynamic stress intensity problem of double linear cracks near a circular hole impacted byincident SH-wave. The train of thought for this problem is that: Firstly, a Green’s function isconstructed for the problem, which is a fundamental solution of displacement field for an elasticspace possessing a circular hole and a linear crack while bearing out-of-plane harmonic line sourceforce at any point; Secondly, in terms of the solution of SH-wave’s scattering by an elastic spacewith a circular hole and a linear crack, anti-plane stresses which are the same in quantity butopposite in direction to those mentioned before, are loaded at the region where the second crack isin existent actually, we called this process “crack-division”; Finally, the expressions of thedynamic stress intensity factor(DSIF) of the cracks are given when the circular hole and doublelinear crack exist at the same time. Then, by using the expressions, an example was provided toshow the effect of circular hole and cracks on the dynamic stress intensity factor of the cracks
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.385-387.105.pdf
