|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Bending Fatigue Testing for Electronic Connectors
||David Snyder, Larry Wojnicz, Michael Gedeon, Chad Finkbeiner, Chen Jidong
|On-Site Speaker (Planned)
Bending fatigue resistance is a significant topic in spring material selection and electronic connector design, yet the scope of available industry test methods for sheet metal is both limited and outdated. Further, while it is understood that test results are highly dependent on the conditions of sheet specimen fabrication, little information has been published on the topic. The state of bending fatigue testing for sheet metal is reviewed, with a focus on the method, scope and limitations of the approach outlined in ASTM B593. Results of a comprehensive evaluation of precision and bias in this test method across multiple test laboratories is presented. The impact of specimen fabrication (edge milling, blanking and photochemical etching) on stress state and test results is also presented. Gaps in test methods and data availability important to connector design, and proposals for enhancing sheet metal fatigue test methods will be discussed.