Structural Performance of Candidate Ablatives for Uptake Section of Vertical Launching System.

Abstract

The structural performance of several candidate ablatives for the uptake section of the Navy's Vertical Launching System is investigated. The uptake is modeled using a fixed-fixed beam-loaded by a uniform pressure. Beam displacement field equations are solved, assuming that the ablatives exhibit bimodular behavior in tension and compression. The candidate ablatives are ranked according to predicted structural performance. The current uptake ablative, MXBE-350, possesses the highest factor of safety in this analysis, although all but one of the ablatives considered appears to be acceptable. Additionally, the effects of erosion on the magnitudes of the peak stresses seen by the virgin ablatives are analyzed by varying the thickness of the ablatives in the uptake. As the thickness of the ablative decreases, the peak stresses in the ablative decrease. Finally, the effect of the stiffness of the ablative on predicted stresses in the adhesive layer is computed. As the elastic modulus of the ablative increases, the stresses in the adhesive decrease.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1992
Accession Number
ADA258218

Entities

People

  • John W. Powers

Organizations

  • Naval Surface Warfare Center

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Bending Moments
  • Bending Stress
  • Composite Materials
  • Compressive Strength
  • Elastic Properties
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Plastic Explosives
  • Shear Stresses
  • Surface Warfare
  • Tensile Modulus
  • Tensile Strength
  • Tensile Stress
  • Test Methods
  • Yield Strength

Readers

  • Polymer Science and Engineering.
  • Structural Dynamics.
  • ballistics.