A Method to Evaluate the Material Parameters of Viscoplastic Damage Uniform Constitutive Equations

LI Hai-yan; NIE Jing-xu

Volume 18 Issue 3

Jun. 2003

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LI Hai-yan, NIE Jing-xu. A Method to Evaluate the Material Parameters of Viscoplastic Damage Uniform Constitutive Equations[J]. Journal of Aerospace Power, 2003, 18(3): 388-393.

Citation:

LI Hai-yan, NIE Jing-xu. A Method to Evaluate the Material Parameters of Viscoplastic Damage Uniform Constitutive Equations[J]. Journal of Aerospace Power, 2003, 18(3): 388-393.

LI Hai-yan, NIE Jing-xu. A Method to Evaluate the Material Parameters of Viscoplastic Damage Uniform Constitutive Equations[J]. Journal of Aerospace Power, 2003, 18(3): 388-393.

Citation:

LI Hai-yan, NIE Jing-xu. A Method to Evaluate the Material Parameters of Viscoplastic Damage Uniform Constitutive Equations[J]. Journal of Aerospace Power, 2003, 18(3): 388-393.

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A Method to Evaluate the Material Parameters of Viscoplastic Damage Uniform Constitutive Equations

Beijing University of Aeronautics and Astronautics, Beijing 100083,China

Received Date: 2002-07-10
Rev Recd Date: 2002-12-12
Publish Date: 2003-06-28

Abstract

Abstract

The viscoplastic damage uniform constitutive model and the constant evaluation method are reviewed, and a new simple method is presented to determine the material parameters of viscoplastic damage uniform constitutive equations. Then the genetic algorithm is used to optimize the parameters of the directionally solidified alloy DZ4. This method is proved to be reliable by the calculated saturation loops and creep curves.
- aerospace propulsion system,
- viscoplastic,
- constitutive model,
- creep,
- fatigue,
- parameter optimization