|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||GG-7: Evaluating Fatigue Performance and Residual Stresses Effect on Crack Initiation in High Speed Helical Gears Using Modelling and Experimentation
||Ali Jammal, Hui Wang, Yiming Rong
|On-Site Speaker (Planned)
This particular study focus on hardened steel 20CrMnTi used in gear manufacturing. One pair of helical gear is put under experimentation, and subjected to fluctuating high speed and counter torque on the output gear. While the vibration response, temperature and the displacements are monitored. Then the gear pair are disassembled and scanned using SEM (scanning electron microscope) to detect micro cracks on and under tooth surface in their early stages. Also an XRD (X-ray diffraction) test is carried to estimate the residual stresses on the gear tooth at the contacting point and the root fillet. FEA (finite element analysis) is also used to predict stresses and damage on the gears tooth, furthermore stress life fatigue models are employed to predict the number of life cycles to failure. Experimentation and modelling showed that fatigue and stresses led to micro cracks formation which transformed to full sized cracks under cyclic loading.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)