Large Amplitude Compression and Shear Wave Propagation in Impact-Loaded PMMA.

Abstract

The goal of this research was to develop an improved understanding of the high strain rate material response of polymers by studying the propagation of large-amplitude, one-dimensional compression and shear waves in impact-loaded polymethyl methacrylate (PMMA). Experimental techniques were designed and developed to permit measurement of large-amplitude shear waves. Measurements were made of the shear particle velocity at the impact surface and in the sample interior. The measurement of shear wave velocities permitted the first determination of the shear and bulk modulus in the shocked state. The shear wave profiles measured at several gage locations in the sample were integrated (using a Lagrangian analysis for compression and shear waves) to provide shear stress-strain response in the shocked state. These results are the first of their kind and provide an important constraint on the shear (or deviator) response of the material. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1981
Accession Number
ADA105953

Entities

People

  • Y. M. Gupta

Organizations

  • SRI International

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Bulk Modulus
  • Compression
  • Contracts
  • Materials
  • Measurement
  • Particles
  • Polymethyl Methacrylate
  • Secondary Waves
  • Shear Modulus
  • Shear Properties
  • Shear Stresses
  • Shock
  • Shock Waves
  • Strain Rate
  • Wave Propagation
  • Waves

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Mechanical Engineering/Mechanics of Materials.