期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 27, 期 6, 页码 3144-3152出版社
SPRINGER
DOI: 10.1007/s11665-017-3045-4
关键词
critical plane approach; damage mechanics; GH4169; life prediction; multiaxial fatigue
资金
- Startup Foundation of Nanjing University of Aeronautics and Astronautics in China
A new multiaxial fatigue life prediction model has been proposed in this paper. The concepts of nonlinear continuum damage mechanics and critical plane criteria were incorporated in the proposed model. The shear strain-based damage control parameter was chosen to account for multiaxial fatigue damage under constant amplitude loading. Fatigue tests were conducted on nickel-based superalloy GH4169 tubular specimens at the temperature of 400 A degrees C under proportional and nonproportional loading. The proposed method was checked against the multiaxial fatigue test data of GH4169. Most of prediction results are within a factor of two scatter band of the test results.
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