Dynamic Properties of Poly(methylmethacrylate) (PMMA) (Plexiglas)

Abstract

Uniaxial stress behavior, elastic constants, equation of state, compressive and release wave characteristics, and spall fracture of PMMA are investigated. The material showed viscoelastic response under uniaxial stress conditions, and was strain rate sensitive at 20 and 82 C. Longitudinal and shear wave velocities at 20 C were 2.746 and 1.392 mm/ microsec, and temperature dependence was also measured. The shock wave equation of state was determined up to 20 Kbar and showed a complex form in the stress-particle velocity plane that is indicative of non- linear shock-velocity-particle velocity behavior. Complete wave profiles were obtained showing compressive wave and release wave development. Spall fracture velocity showed a slight pulse-width dependence and the fracture surface showed a granular-type appearance with extensive crazing.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1972
Accession Number
AD0743547

Entities

People

  • Douglas R. Christman

Organizations

  • General Motors

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Agreements
  • Aluminum
  • Composite Materials
  • Elastic Waves
  • Equations
  • Manufacturing
  • Materials
  • Measurement
  • Metals
  • Plexiglas
  • Secondary Waves
  • Shock Waves
  • Strain Rate
  • Thermal Expansion
  • Wave Propagation
  • Waves

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.