About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Electrical Steels
|
| Presentation Title |
Specimen Design to Investigate Fatigue Aspects of Small Cross-Section Electrical Steel Bridges |
| Author(s) |
Srinidhi Sampath, Joel Virtanen, Katerina Chantziara, Erik Johansson, David Lindell |
| On-Site Speaker (Planned) |
Srinidhi Sampath |
| Abstract Scope |
Rotors of high efficiency electrical motors contain a series of punched electrical steel sheets that may include slots to insert permanent magnets, separated from the stator by thin bridges. These bridges contain few grains across the thickness and fatigue testing of small cross-section specimens is challenging. The purpose of this work is to develop a test method to address this gap using standard test machines. Several test specimen designs with simulated bridge geometry were developed using finite element analysis to ensure that maximum stress was concentrated in the region of interest. Specimens cut from 0.35 mm thick electrical sheet steel were fatigue tested at an R-value of 0.1. One of these designs failed randomly but always in the thin bridge location, demonstrating that the microstructure determines the fracture. This work is highly relevant to the dimensioning of thin bridges for high efficiency permanent magnet electrical motors. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Mechanical Properties, Iron and Steel |