Accession Number:

ADA053393

Title:

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

Descriptive Note:

Topical rept. Jan-Dec 76,

Corporate Author:

WEIDLINGER ASSOCIATES NEW YORK

Personal Author(s):

Report Date:

1977-03-01

Pagination or Media Count:

44.0

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.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE