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:
The surface cracks are easy to occur in the solid missile motor grain. The solid missilemotor grain with cracks is very dangerous when it is lunched, because the surface cracks might bepropagation unstable when the internal pressure enters the surface cracks cavity. In order to analyzethe surface crack of solid motor grain, with accelerated aging test, the variation law of mechanicsproperties of propellant in the storage period is obtained. Under internal pressure and axialacceleration loading, the three-dimension finite element models of the motor grain are established,three-dimension singular crack elements at the tips of surface cracks are established to simulate thecracks propagation. Along with the surface crack propagation, the stress intensity factors of thecrack tips in different storage period are calculated to prejudge its stability respectively. The methodand conclusions are available for using solid missile motor grain with surface cracks
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.93.pdf
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