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MAE 695-06

MAE 695-06. Penetrator Equations. 04/07/2008. The Young Penetrator Equation. C.W. Young, Sandia National Laboratories: For V ≥ 61 m/s For low weight penetrators, in “soft” material, modification to RHS of equation: Therefore,. The Young Penetrator Equation. LUNAR-A Deceleration.

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MAE 695-06

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  1. MAE 695-06 Penetrator Equations 04/07/2008

  2. The Young Penetrator Equation • C.W. Young, Sandia National Laboratories: • For V ≥ 61 m/s • For low weight penetrators, in “soft” material, modification to RHS of equation: • Therefore,

  3. The Young Penetrator Equation

  4. LUNAR-A Deceleration Typical acceleration of a mass over a distance:

  5. LUNAR-A Deceleration

  6. Future Work • Open issues: • Lunar regolith – rock, soil, layering, … ? • Lunar regolith penetrability, S-number • LUNAR-A nose coefficient, N-number • Ks value, use, etc. • m/A scaling • Penetrator equations • AIAA Paper • Equations, S-number, N-number, absense of Ks? • Forrestal • NDRC (Joint Services Manual for the Design and Analysis of Hardened Structures to Conventional Weapons Effect) • Other?

  7. References • Young: • C.W. Young, “An Empirical Equation for Predicting Penetration Depth Into Soft Sediments,” IEEE, 1981. • C.W. Young, “Penetrator Equations,” Contractor Report, SAND97-2426, Unlimited Release, UC-705. • C.W. Young, “Simplified Analytical Model of Penetration with Lateral Loading: User’s Guide,” Contractor Report, SAND98-0978, Unlimited Release, UC-705. • Other: • Amy S. Lo, et al., “Penetrator Science – Making an Impact on Planetary Compositional Science,” AIAA 2006-7423.

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