Fatigue damage rule of LY12CZ aluminium alloy under sequential biaxial loading |
| |
Authors: | YingYu Wang DaChuan Zhang WeiXing Yao |
| |
Institution: | 1. Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
|
| |
Abstract: | A series of biaxial two-level variable amplitude loading tests are conducted on smooth tubular specimens of LY12CZ aluminium alloy. The loading paths of 90° out-of-phase, 45° out-of-phase and 45° in-phase are utilized. The fatigue damage cumulative rules under two-level step loading of three loading paths are analyzed. By introducing a parameter α which is a function of the phase lag angle between the axial and the torsional loading, a new multiaxial nonlinear fatigue damage cumulative model is proposed. The proposed model is evaluated by the experimental data for two-level loading, multi-level loading of LY12CZ aluminium alloy, and multi-level loading of 45 steel. Fatigue lives predicted are within a factor of 2 scatter band. |
| |
Keywords: | multiaxial fatigue fatigue damage rule nonproportional loading variable amplitude loading |
本文献已被 CNKI SpringerLink 等数据库收录! |