Paper Title:
Analysis of the Surface Cracks of Long Range Storage Solid Motor Grain
  Abstract

The surface cracks are easy to occur in the solid missile motor grain. The solid missile motor grain with cracks is very dangerous when it is lunched, because the surface cracks might be propagation unstable when the internal pressure enters the surface cracks cavity. In order to analyze the surface crack of solid motor grain, with accelerated aging test, the variation law of mechanics properties of propellant in the storage period is obtained. Under internal pressure and axial acceleration 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 the cracks propagation. Along with the surface crack propagation, the stress intensity factors of the crack tips in different storage period are calculated to prejudge its stability respectively. The method and conclusions are available for using solid missile motor grain with surface cracks.

  Info
Periodical
Key Engineering Materials (Volumes 324-325)
Edited by
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
Pages
93-96
DOI
10.4028/www.scientific.net/KEM.324-325.93
Citation
D. C. Yuan, G. J. Tang, Y. J. Lei, S. Y. Meng, "Analysis of the Surface Cracks of Long Range Storage Solid Motor Grain", Key Engineering Materials, Vols. 324-325, pp. 93-96, 2006
Online since
November 2006
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Price
$32.00
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