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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 1    February 2006

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New inverse method for identification of constitutive parameters
ZHOU Ji-ming(周计明), QI Le-hua(齐乐华), CHEN Guo-ding(陈国定)

School of Mechatronic Engineering, Northwestern Polytechnical University, Xi’an 710072, China
Received 8 May 2005; accepted 16 August 2005

Abstract:A new inverse method by coupling iSIGHT and ABAQUS was proposed to determine the constitutive parameters of Al2O3sf/LY12 composite deforming at elevated temperature. It combined the merits of the finite element simulation and optimization technique. The direct model was simulated with finite element code ABAQUS. The inverse problem associated with the identification of the constitutive parameters was expressed as a least square optimization problem. The direct simulation and the parameters optimization were implemented in iSIGHT integrated environment. The aim was to match the output of the direct simulation with the experiment data. The capability of the proposed inverse method was demonstrated through the identification of constitutive parameters of Al2O3sf/LY12 composite. The proposed new inverse method is also applicable to other parameters identification which is hardly determined through experiments or direct analytical method.

 

Key words: Al2O3sf/LY12 composite; constitutive parameters; inverse method; parameter identification; hot deformation; iSIGHT; ABAQUS

ISSN 1672-7029
CN 43-1423/U

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