Approximation of the stiffness of laminate stacks of electric motors subjected to cyclic loads
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Viktor Szabó
Viktor Szabó, born in 1980, graduated at the Budapest University of Technology and Economics, Department of Applied Mechanics in 2005. He started working in Nuclear Fusion Research at the same department in cooperation with KIT Campus Nord (former FZK), IPP Greifswald, FZ Jülich, focusing on thermomechanics. In 2011, he joined AUDI HUNGARIA Zrt. as a Simulations Engineer at Powertrain Development, where he worked on structural strength FEM methods for electric motors. He is currently working at the Test Center of the Powertrain Development at AUDI HUNGARIA Zrt., and working on a PhD at Széchenyi University Győr.
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Dániel Feszty
Dr. Dániel Feszty, born in 1972, is a Senior Manager at Audi Hungaria’s Department of Whole Vehicle Development in Győr, Hungary, as well as Professor and Head of Department at Széchenyi University in Győr. He also holds an Adjunct Professor status at the Department of Mechanical and Aerospace Engineering at Carleton University in Canada. Dr. Feszty has research expertise in vibroacoustics and CFD, with applications to road and air vehicles.
Dr. Balázs Pere, born in 1973, graduated at the University of Pécs, Department of Theoretical Physics in 1998, PhD degree at University of Miskolc, Department of Mechanics in 2006. He started working at Széchenyi István University in Győr in 2001, where he is currently Head of Department at the Department of Applied Mechanics.
Abstract
Electric motors in automotive applications are subjected to high thermal and structural loads, while having strict requirements regarding dimensions, mass, and costs. The design of such motors requires sophisticated simulation models. The laminate stack in the rotor of such a motor is made of steel sheets and behaves transversally isotropic: the radial stiffness is equivalent to steel, and in the axial direction, it has a highly progressive nonlinear stiffness characteristic. The loading and unloading stiffness curves change from cycle to cycle when subjected to repetitive loads. In this paper, the usage of a single approximating curve to describe the longitudinal stiffness of the laminate stack is proposed. This approximation can be used in FEM models to reproduce the structural nonlinear behavior of such a laminate stack using a simpler approach than implementing the full loading and unloading curves in a material model, at a price of negligible loss of precision.
About the authors
Viktor Szabó, born in 1980, graduated at the Budapest University of Technology and Economics, Department of Applied Mechanics in 2005. He started working in Nuclear Fusion Research at the same department in cooperation with KIT Campus Nord (former FZK), IPP Greifswald, FZ Jülich, focusing on thermomechanics. In 2011, he joined AUDI HUNGARIA Zrt. as a Simulations Engineer at Powertrain Development, where he worked on structural strength FEM methods for electric motors. He is currently working at the Test Center of the Powertrain Development at AUDI HUNGARIA Zrt., and working on a PhD at Széchenyi University Győr.
Dr. Dániel Feszty, born in 1972, is a Senior Manager at Audi Hungaria’s Department of Whole Vehicle Development in Győr, Hungary, as well as Professor and Head of Department at Széchenyi University in Győr. He also holds an Adjunct Professor status at the Department of Mechanical and Aerospace Engineering at Carleton University in Canada. Dr. Feszty has research expertise in vibroacoustics and CFD, with applications to road and air vehicles.
Dr. Balázs Pere, born in 1973, graduated at the University of Pécs, Department of Theoretical Physics in 1998, PhD degree at University of Miskolc, Department of Mechanics in 2006. He started working at Széchenyi István University in Győr in 2001, where he is currently Head of Department at the Department of Applied Mechanics.
Acknowledgment
The authors wish to express thanks for the support to Mr. Jürgen Königstedt, Mr. Balázs Lőrincz, Dr. Péter Raffai, Mr. Dániel Harrach, and Dr. Péter Böröcz.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: The experimental part of this research was funded by AUDI HUNGARIA Zrt.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Frontmatter
- Innovative prevention of stress corrosion crack propagation in nuclear power pipe welds
- A new manufacturing process for allogeneic bone plates based on high hydrostatic pressure–treated granules for jaw augmentation
- Effects of Mn and Cu on descaling of hot-rolled 304L stainless steel in HCl and H2O2 mixtures
- Development of morphology and lattice misfit in modified Ni-base superalloy with Al, Co and Ni additions
- Adhesive wear behavior of FeB–FeMn–C coatings produced by GTAW
- Approximation of the stiffness of laminate stacks of electric motors subjected to cyclic loads
- Microstructure development and mechanical behaviour of pure copper processed by the novel TWO-CAP procedure
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- Cheetah optimization algorithm for optimum design of heat exchangers
- Influence of Ti and Nb addition on the microstructure, mechanical, and machinability properties of 316L stainless steel fabricated by powder metallurgy
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