MECHANICAL ENGINEERING OF PLASTIC NOSE CONES HAVING STRESS-CRACKING TENDENCIES,

Abstract

Relaxation (applied strain) data are necessary to select a material that can withstand the level of strain in the XM429 design without stress cracking. However, such data are not available for polyphenylene oxide and many other plastics used in ordnance. This prompted a study of the applicability of the more abundant data, namely creep (applied stress), constant strain rate, and bursting pipe (applied pressure) data to this problem; means of using these data in an applied strain problem are described. Bursting pipe data are used to show that low melt index, high-density polyethylene is a material mechanically acceptable for use on the XM429. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1968
Accession Number
AD0673700

Entities

People

  • George K. Lucey Jr.

Organizations

  • Harry Diamond Laboratories

Tags

DTIC Thesaurus Topics

  • Biomedical And Dental Materials
  • Dielectric Polymers
  • Engineering
  • Films
  • High Density
  • Material Degradation Processes
  • Materials
  • Mechanical Engineering
  • Munitions
  • Nose Cones
  • Plastics
  • Polymeric Films
  • Resins
  • Strain Rate
  • Stress Cracking
  • Thermosetting Plastics

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Polymer Science and Engineering.
  • ballistics.