Nonlinear Constitutive Modeling of Viscoelastic Foams: Application to Impact Protection

Abstract

Open-cell elastomeric foams are materials made up of two continuous phases: a polymeric elastomer matrix and a connected, air-filled pore space. Due to their elastomeric matrix and porous structure, these materials are highly compliant and capable of undergoing large, reversible deformations involving substantial changes in volume. Moreover, due to the viscoelasticity of the elastomeric matrix, many elastomeric foams display a highly dissipative, rate-dependent mechanical response, manifesting in rate-dependence of the stress/strain response and hysteresis under reversed loading. These materials are widely-used in situations, in which both compliance and energy dissipation are necessary, e.g., impact protection, cushioning, and vibration damping, and appear in a wide variety of specific applications, such as personal protective equipment.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 30, 2019
Accession Number
AD1089565

Entities

People

  • David L. Henann

Organizations

  • Brown University

Tags

Communities of Interest

  • Biomedical
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Applied Mechanics
  • Boundaries
  • Constitutive Equations
  • Cross Correlation
  • Digital Images
  • Elastic Properties
  • Engineering
  • Equations
  • Experimental Data
  • Far Field
  • Free Energy
  • Geometry
  • Hyperelastic Materials
  • Load Cells
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Engineering
  • Mechanical Working
  • Mechanics
  • Protective Equipment
  • Shear Modulus
  • Three Dimensional
  • Two Dimensional

Readers

  • Materials Science
  • Mechanical Engineering/Mechanics of Materials.
  • Nanocomposite Materials Science

Technology Areas

  • Space