Rectangular Flat-Pack Lids under External Pressure: Improved Formulas for Screening and Design. Revised.

Abstract

Earlier work is improved and extended to provide formulas for the maximum tensile stress in the lid-to-wall seal, the maximum lid deflection, and the lid collapsing pressure for a rectangular flat-pack under external pressure. It is shown how these formulas can facilitate (a) the proper design of the package so that it will retain its hermeticity and serviceability under a given screening pressure and (b) the selection of a proper pressure to use in the hermeticity screening of an already designed package. Information is also given on the approximate equivalence of external pressure and centrifuge acceleration in regard to the seal stresses and lid behavior. Finally, experimental data on package hermeticity are presented which tend to confirm the validity of the main hypotheses of the present work. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1979
Accession Number
ADA072421

Entities

People

  • Charles Libove

Organizations

  • Syracuse University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Bending Moments
  • Boundaries
  • Elastic Properties
  • Experimental Data
  • Flexural Strength
  • Hydrostatic Pressure
  • Materials
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Plastic Properties
  • Stiffness
  • Stresses
  • Tensile Strength
  • Tensile Stress
  • Test Methods

Readers

  • Software Engineering
  • Structural Dynamics.