Gouge initiation in high-velocity rocket sled testing
| Autor: | C.H. Yew, T.G. Trucano, R.D.M. Tachau |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Engineering
business.product_category Computer simulation business.industry Projectile Mechanical Engineering Aerospace Engineering Mechanical engineering Moving load Ocean Engineering Mechanics Deformation (meteorology) Rocket Mechanics of Materials Automotive Engineering Hypervelocity Fusee Safety Risk Reliability and Quality business Civil and Structural Engineering Gun barrel |
| Zdroj: | International Journal of Impact Engineering. 17:825-836 |
| ISSN: | 0734-743X |
| DOI: | 10.1016/0734-743x(95)99903-5 |
| Popis: | A model is presented which describes the formation of surface damage “gouging” on the rails that guide rocket sleds. An unbalanced sled can randomly cause a very shallow-angle, oblique impact between the sled shoe and the rail. This damage phenomenon has also been observed in high-velocity guns where the projectile is analogous to the moving sled shoe and the gun barrel is analogous to the stationary rail. At sufficiently high velocity, the oblique impact will produce a thin hot layer of soft material on the contact surfaces. Under the action of a normal moving load, the soft layer lends itself to an anti-symmetric deformation and the formation of a “hump” in front of the moving load. A gouge is formed when this hump is overrun by the sled shoe. The phenomenon is simulated numerically using the CTH strong shock physics code, and the results are in good agreement with experimental observation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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