Research Catalog

Anisotropic constitutive model for nickel base single crystal alloys development and finite element implementation

Title
Anisotropic constitutive model for nickel base single crystal alloys [microform] : development and finite element implementation / by L. Thomas Dame and D.C. Stouffer.
Author
Dame, L. Thomas.
Publication
Cincinnati, Ohio : University of Cincinnati ; [Washington, D.C.] : National Aeronautics and Space Administration, [1986]

Details

Additional Authors
  • Stouffer, Donald C.
  • University of Cincinnati.
  • Lewis Research Center.
Description
iii, 125 p. : ill.; 29 cm.
Summary
"A tool for the mechanical analysis of nickel base single crystal superalloys, specifically Rene N4, used in gas turbine engine components is developed. This is achieved by a rate dependent anisotropic constitutive model implemented in a nonlinear three dimensional finite element code. The constitutive model is developed from metallurigical concepts utilizing a crystallographic approach. A non Schmid's law formulation is used to model the tension compression asymmetry and orientation dependence in octahedral slip. Schmid's law is a good approximation to the inelastic response of the material in cube slip. The constitutive equations model the tensile behavior, creep response, and strain rate sensitivity of these alloys. Methods for deriving the material constants from standard tests are presented. The finite element implementation utilizes an initial strain method and twenty noded isoparametric solid elements. The ability to model piecewise linear load histories is included in the finite element code. The constitutive equations are accurately and economically integrated using a second order Adams-Moulton predictor-corrector method with a dynamic time incrementing procedure. Computed results from the finite element code are compared with experimental data for tensile, creep and cyclic tests at 760 deg C. The strain rate sensitivity and stress relaxation capabilities of the model are evaluated."--NTIS abstract.
Series Statement
NASA contractor report ; 175015
Uniform Title
NASA contractor report ; NASA CR-175015.
Subject
  • Chromium alloys
  • Anisotropy
  • Constitutive equations
  • Fatigue (materials)
  • Heat resistant alloys
  • Nickel alloys
  • Single crystals
Note
  • "March 1986."
Thesis (note)
  • Thesis (Ph. D.)--University of Cincinnati, 1985.
Bibliography (note)
  • Includes bibliographical references (p. 119-125).
Type of Report (note)
  • Final report.
Reproduction (note)
  • Microfiche.
Funding (note)
  • Prepared for Lewis Research Center under grant
Call Number
GPO Microfiche NAS 1.26:175015
OCLC
marcive228508592
Author
Dame, L. Thomas.
Title
Anisotropic constitutive model for nickel base single crystal alloys [microform] : development and finite element implementation / by L. Thomas Dame and D.C. Stouffer.
Imprint
Cincinnati, Ohio : University of Cincinnati ; [Washington, D.C.] : National Aeronautics and Space Administration, [1986]
Series
NASA contractor report ; 175015
NASA contractor report ; NASA CR-175015.
Thesis
Thesis (Ph. D.)--University of Cincinnati, 1985.
Bibliography
Includes bibliographical references (p. 119-125).
Type Of Report
Final report.
Reproduction
Microfiche. [Washington, D.C. : National Aeronautics and Space Administration], 1986. 2 microfiches: negative.
Funding
Prepared for Lewis Research Center under grant NAG 3-5ll
Added Author
Stouffer, Donald C.
University of Cincinnati.
Lewis Research Center.
Other Form:
Online version: Dame, L. Thomas. Anisotropic constitutive model for nickel base single crystal alloys. (OCoLC)702644426
Paper version: Dame, L. Thomas. Anisotropic constitutive model for nickel base single crystal alloys. iii, 125 p. (OCoLC)702645377
Gpo Item No.
0830-H-14 (MF)
Sudoc No.
NAS 1.26:175015
View in Legacy Catalog