Accession Number:

AD0840134

Title:

STRESS WAVES IN LAYERED ARBITRARY MEDIA SLAM CODE FREE-FIELD STUDY. VOLUME I.

Descriptive Note:

Final rept. 17 Aug 66-23 Feb 68,

Corporate Author:

IIT RESEARCH INST CHICAGO IL

Personal Author(s):

Report Date:

1968-07-01

Pagination or Media Count:

211.0

Abstract:

This research program extends the capabilities of the free-field response code developed previously in AD-801 237 and AD-801 903. The code, termed SLAM code Stress Waves in Layered Arbitrary Media, is a large-scale finite element computer code used to predict the free-field response of arbitrarily layered site configurations, accounting for both surface air overpressure and direct ground shock effects. The SLAM code has been developed to treat either the plane stress or strain problem or the axisymmetric configuration. The user needs merely to enter one number in the data input to indicate which configuration is to be considered. In the current development described herein, the material constitutive law was extended to include arbitrary nonlinear effects. The code was set up to allow relatively easy extension for any nonlinear constitutive law which can be specified. Two separate nonlinear material descriptions were coded and made operational in the current code, these being a the von Mises elastic-plastic incremental flow law, and b the Coulomb-Mohr elastic-plastic flow law. These material laws were chosen primarily since they have applicability to many materials of interest in free-field response problems. However, they are by no means applicable to all materials of interest, nor do they in many cases yield all the responses known to exist in real soil or rock materials.

Subject Categories:

  • Seismology
  • Theoretical Mathematics
  • Computer Programming and Software
  • Computer Systems
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE