Estimating High Cycle Fatigue Lifetime using Chaboche-Lemaitre Damage Model

• Main Authors: A. H . Mehdizadeh, M. Mashayekhi, M. Kadkhodaei
• Format: Article
• Language: fas
• Published: Isfahan University of Technology 2016-09-01
• Series: Ravish/hā-yi ̒adadī dar Muhandisī
• Subjects: Continuum damage mechanics; high cycle fatigue; lifetime estimation; jump-in-cycles procedure.
• Online Access: http://jcme.iut.ac.ir/browse.php?a_code=A-10-1-5&slc_lang=en&sid=1

This article predicts lifetime of high cycle fatigue loading using Chaboche-Lemaitre damage model. The Chaboche-Lemaitre damage model takes into account mean stress effect as well as compressive stresses effect, making crack to close. In the this paper, a numerical algorithm is offered to integrate this model implicitly and the obtained algorithm is implemented as a user material subroutine of the ABAQUS finite element software. To reduce computation time, Jump-in-Cycles procedure is used based on fatigue loading simulation. To verify the proposed algorithm, a V-notched specimen is chosen under a fatigue loading with different stress ratios, and its lifetime is compared with experiments. Next, an aviation industry part, main rotor spindle of an aircraft blades, subjected to a variable fatigue loading is analysed.