STATIC TESTS UPON THIN DOMES BURIED IN SAND

Abstract

Thin-walled domes were buried within a sand mass which was 5 feet in diameter. A uniform static pressure was applied to the top surface of the sand mass. Instrumentation measured the total vertical force reaching the dome, vertical move ments of the dome, strains within the dome, and movements within the sand mass. Relatively little negative arching was observed when the dome had a stiff support, but considerable posi tive arching did appear when the support for the dome was "soft". The buried domes did not de velop a "snap-through" buckling under an aver age vertical pressure almost three times the pressure that buckled the dome when unburied; rather the buried domes yielded as the result of bending stresses near the support. It was gener ally possible to increase the surface pressure considerably even after the domes failed near the support, and under certain conditions the additional deformation in the dome was quite small.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1962
Accession Number
AD0407586

Entities

People

  • Kaare Hoeg
  • Robert V. Whitman
  • Zvi Getzler

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Human Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Bending Stress
  • Civil Engineering
  • Engineers
  • Failure Mode And Effect Analysis
  • Instrumentation
  • Load Cells
  • Load Distribution
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Orientation (Direction)
  • Pressure Distribution
  • Pressure Measurement
  • Strain Gages
  • Stress Strain Relations
  • Yield Strength

Readers

  • Geotechnical Engineering.
  • Snow Cover Descriptors for Reptiles and Their Illustrations.
  • Structural Dynamics.