IMPLEMENTATION OF ELASTIC-PLASTIC AND FRACTURE CAPABILITIES IN IFSAS

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Authors
  1. Link, R.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN);Combustion Dynamics Ltd, Medicine Hat ALTA (CAN)
Abstract
The report describes the implementation of an elastic-plastic fracturing constitutive model to simulate stress-strain behavior in metals. The elastic-plastic model adopted here is similar to one used by Krieg and Key (1976), and used by Hallquist (1983) in the dynamic finite element code DYNA3D. Stiffness changes are incorporated through use of a multilinear stress-strain curve. An elastic-plastic constitutive law with a mixed hardening flow rule is used to simulate plastic deformations and cyclic loading effects. Fracturing is incorporated by using a maximum effective plastic strain model described later. The report is divided into three further sections. Section 2 provides a description of the model, and implementation details. Section 3 describes the incorporation of a fracture model within the context of the fluid-structure interaction code IFSAS. Finally, Section 4 is a description of a large deformation problem analysed using an in-house solid hydrocode.
Keywords
Fluid-structure interactions;Blast waves;Hydrocodes
Report Number
DREV-CR-903 — Contractor Report
Date of publication
12 Apr 1996
Number of Pages
15
DSTKIM No
96-03172
CANDIS No
499704
Format(s):
Hardcopy;Document Image stored on Optical Disk

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