| Abstract:In response to the growing need for the development of assessment methods for damage tolerance design in aeroengine
disks, a study on simplified modeling methods for disk cracks was conducted. This research focused on typical crack types that could exist
in key regions of the disk, such as the bore, web, and bolt holes. By utilizing the geometric characteristics of the disk along with its loading
conditions, fracture mechanics analysis was performed on both the complete disk and simplified cracked body models using the commercial
software. A comparative analysis was carried out to establish principles for selecting and constructing simplified cracked body models
based on the characteristic features of different disk regions and their corresponding critical crack sizes. The results show that employing
simplified cracked body models to replace the actual disk components for crack propagation analysis yields stress intensity factors and
crack size variation curves with cyclic loading that closely resemble the computed results from the actual disk model. The calculated criti?
cal crack size exhibited discrepancies within ±10%, and the predicted crack propagation life exhibited differences within ±5% compared to
the actual disk calculations. The simplified cracked body models slightly err on the conservative side in estimating the crack propagation
life, as compared to the actual disk's behavior. |
