VIBRATION TESTING OF RESILIENT PACKAGE CUSHIONING MATERIALS

Abstract

Performance criteria for cushioning materials and tentative test methods have been evolved through coordination with an ASTM task group from government and industry. Testing equipment which meets tentative ASTM requirements was developed. Preliminary tests were conducted on a resilient expanded polystyrene foam (in 3 densities) and a polyether urethane foam (in one density). When vibrated under static loads known to provide optimum shock mitigation the polystyrene foam experienced pronounced permanent set after partial completion of the vibration transmissibility test schedule. The set induced in similar new cushions by vibration generally exceeded the set induced (under the same static loads) by 5 successive 36-inch free-fall impacts. The 5- impact sequence gave the vibrated polystyrene cushions permanent sets up to 78%. Transmitted accelerations were up to 220% of those for unvibrated cushions.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1964
Accession Number
AD0444825

Entities

People

  • George Zell

Organizations

  • Picatinny Arsenal

Tags

Communities of Interest

  • Engineered Resilient Systems
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Cushioning
  • Drop Tests
  • Fatigue Tests (Mechanics)
  • Impact Tests
  • Materials
  • Materials Testing
  • Measurement
  • Munitions
  • Plastics
  • Polystyrenes
  • Resonant Frequency
  • Stress Strain Relations
  • Test And Evaluation
  • Test Equipment
  • Test Facilities
  • Test Methods
  • Vibration

Readers

  • Logistics and Supply Chain Management.
  • Polymer Science and Engineering.
  • Structural Dynamics.