DAMAGE-TOLERANCE-BASED LIFE PREDICTION OF AEROENGINE COMPRESSOR DISKS .1. A DETERMINISTIC FRACTURE-MECHANICS APPROACH

被引：21

作者：

KOUL, AK ^{[1
]}

BELLINGER, NC ^{[1
]}

FAHR, A ^{[1
]}

机构：

[1] CARLETON UNIV,DEPT MECH & AERONAUT ENGN,OTTAWA K1S 5B6,ONTARIO,CANADA

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 1990年 / 12卷 / 05期

关键词：

LIFE ASSESSMENT; AEROENGINE COMPRESSOR DISKS; NONDESTRUCTIVE INSPECTION; FATIGUE CRACK GROWTH; DETERMINISTIC FRACTURE MECHANICS; PROBABILITY OF DETECTION; SAFE INSPECTION INTERVAL; DAMAGE TOLERANCE;

D O I：

10.1016/0142-1123(90)90002-V

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper reports the results of a demonstration programme carried out to determine the influence of the sensitivity and reliability of non-destructive inspection (NDI) techniques on the damage-tolerance-based life assessment of aeroengine compressor discs. The programme was carried out on AM-355 compressor discs of an aeroengine. The safe inspection intervals (SII) for the disc are calculated using deterministic fracture mechanics (DFM) principles and different initial crack length (a(i)) selection criteria. These calculations involve the use of the NDI data, finite-element analysis and the experimental fatigue crack growth rate (FCGR) data generated on compact tension specimens machined from safe-life-expired discs. The results demonstrate that a sensitive eddy current and the ultrasonic leaky surface wave NDI techniques yield the largest SII values when the longest crack missed and the detectable crack sizes at 90% probability of detection (POD) and 90/95 POD are substituted for the a(i) values in the DFM calculations. In all cases, however, the SII values are too short for the damage-tolerance-based life cycle management procedure to be cost effective.

引用

页码：379 / 387

页数：9

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