Tensile Behavior of Geological Material in Ground Shock Calculations. II.

Abstract

As part of a continuing study of material models for ground shock calculations, some aspects of both rate-dependent and rate-independent models for tensile behavior are examined. In particular, the SRI brittle fracture model is studied and compared with a simple tension cut off procedure. For large-scale problems such as those described in this report, it is important to avoid rate-dependent brittle tensile models, if possible, since rate effects appear to be important only on time scales much smaller than are resolvable in dynamic calculations. On the other hand, rate-independent brittle fracture models are incompatible with current continuum uniqueness-stability theory and hence may not be useable for these problems. It is necessary to examine this situation if tensile modeling techniques are to improve. Some ideas for resolving this conflict are discussed and recommendations for further study are made.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1977
Accession Number
ADA053393

Entities

People

  • Joseph P. Wright
  • Lorraine Whitman

Tags

Communities of Interest

  • Biomedical
  • Cyber
  • Ground and Sea Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Constitutive Equations
  • Department Of Defense
  • Equations
  • Fluid Dynamics
  • Ground Shock
  • Materials
  • Mechanical Phenomena
  • Mechanical Properties
  • Mechanics
  • Microsecond Time
  • New York
  • Porous Materials
  • Sensitivity
  • Shock
  • Tensile Strength
  • Tensile Stress
  • Tensile Testing

Readers

  • Computational Modeling and Simulation
  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.