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Title: The Finite Strain Johnson Cook Plasticity and Damage Constitutive Model in ALEGRA.

Abstract

A finite strain formulation of the Johnson Cook plasticity and damage model and it's numerical implementation into the ALEGRA code is presented. The goal of this work is to improve the predictive material failure capability of the Johnson Cook model. The new implementation consists of a coupling of damage and the stored elastic energy as well as the minimum failure strain criteria for spall included in the original model development. This effort establishes the necessary foundation for a thermodynamically consistent and complete continuum solid material model, for which all intensive properties derive from a common energy. The motivation for developing such a model is to improve upon ALEGRA's present combined model framework. Several applications of the new Johnson Cook implementation are presented. Deformation driven loading paths demonstrate the basic features of the new model formulation. Use of the model produces good comparisons with experimental Taylor impact data. Localized deformation leading to fragmentation is produced for expanding ring and exploding cylinder applications.

Authors:
 [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
ARL; USDOE
OSTI Identifier:
1423181
Report Number(s):
SAND-2018-1392
660682
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Sanchez, Jason James. The Finite Strain Johnson Cook Plasticity and Damage Constitutive Model in ALEGRA.. United States: N. p., 2018. Web. doi:10.2172/1423181.
Sanchez, Jason James. The Finite Strain Johnson Cook Plasticity and Damage Constitutive Model in ALEGRA.. United States. doi:10.2172/1423181.
Sanchez, Jason James. Thu . "The Finite Strain Johnson Cook Plasticity and Damage Constitutive Model in ALEGRA.". United States. doi:10.2172/1423181. https://www.osti.gov/servlets/purl/1423181.
@article{osti_1423181,
title = {The Finite Strain Johnson Cook Plasticity and Damage Constitutive Model in ALEGRA.},
author = {Sanchez, Jason James},
abstractNote = {A finite strain formulation of the Johnson Cook plasticity and damage model and it's numerical implementation into the ALEGRA code is presented. The goal of this work is to improve the predictive material failure capability of the Johnson Cook model. The new implementation consists of a coupling of damage and the stored elastic energy as well as the minimum failure strain criteria for spall included in the original model development. This effort establishes the necessary foundation for a thermodynamically consistent and complete continuum solid material model, for which all intensive properties derive from a common energy. The motivation for developing such a model is to improve upon ALEGRA's present combined model framework. Several applications of the new Johnson Cook implementation are presented. Deformation driven loading paths demonstrate the basic features of the new model formulation. Use of the model produces good comparisons with experimental Taylor impact data. Localized deformation leading to fragmentation is produced for expanding ring and exploding cylinder applications.},
doi = {10.2172/1423181},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2018},
month = {Thu Feb 01 00:00:00 EST 2018}
}

Technical Report:

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