Characterizing thermo-mechanical behavior of superalloy using the eigenfunction virtual fields method. (March 2016)

• Record Type: Journal Article
• Authors: Hao, Wenfeng; Guo, Guangping; Zhang, Yue; Chen, Xinwen
• Is Part Of: Advances in engineering software. Volume 93(2016)
• Page Start: 22
• Page End: 29
• Publication Date: 2016-03
• Subjects: Thermo-mechanical coupling -- Eigenfunction virtual fields method -- Superalloy -- Principal components analysis -- Eigenvectors -- Strain field; Computer-aided engineering -- Periodicals; Engineering -- Computer programs -- Periodicals; Engineering -- Software -- Periodicals; Periodicals; 620.0028553
• DOI: 10.1016/j.advengsoft.2015.11.006
• Languages: English
• ISSNs: 0965-9978

Abstract

Highlights: EVFM was extended to characterize thermo-mechanical behavior of superalloy. Virtual fields were constructed using the eigenvectors of augmented strain matrix. Effect of mesh size and noise on the identification results was analyzed. Abstract: An innovative procedure for characterizing thermo-mechanical behavior of superalloy using the Eigenfunction Virtual Fields Method (EVFM) was proposed. First, the principle of EVFM for thermo-mechanical constants identification was developed based on the principal components analysis. Then, the strain fields were extracted from finite element (FE) simulation of a superalloy plate with a circular hole under uniaxial tension and uniform temperature increment. In addition, the virtual fields were constructed using the eigenvectors of augmented strain matrix. Finally, the thermo-mechanical constants were inversed from the strain fields, and the effect of mesh size and noise on the inversion results was analyzed. The results show that the thermo-mechanical constants of superalloy inversed from EVFM using these eigenvectors as virtual fields are in excellent agreement with the true values.