Statistical estimation of service cracks and maintenance cost for aircraft structuresA method is developed for the statistical estimation of the number of cracks to be repaired in service as well as the repair and the maintenance costs. The present approach accounts for the statistical distribution of the initial crack size, the statistical nature of the NDI technique used for detecting the crack, and the renewal process for the crack propagation of repaired cracks. The mean and the standard deviation of the cumulative number of cracks to be repaired are computed as a function of service time. The statistics of the costs of repair and maintenance, expressed in terms of the percentage of the cost of replacement, are estimated as a function of service time. The results of the present study provide relevant information for the decision of fleet management, the estimation of life cycle cost, and procurement specifications. The present study is essential to the design and cost optimization of aircraft structures.
Document ID
19750048585
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yang, J.-N. (Virginia Polytechnic Institute of State University Blacksburg, Va., United States)
Date Acquired
August 8, 2013
Publication Date
May 1, 1975
Subject Category
Aeronautics (General)
Report/Patent Number
AIAA PAPER 75-767
Meeting Information
Meeting: AIAA, ASME, and SAE, Structures, Structural Dynamics, and Materials Conference