Stochastic model for fatigue crack size and cost effective design decisionsThis paper describes a methodology for making cost effective fatigue design decisions. The methodology is based on a probabilistic model for the stochastic process of fatigue crack growth with time. The development of a particular model for the stochastic process is also discussed in the paper. The model is based on the assumption of continuous time and discrete space of crack lengths. Statistical decision theory and the developed probabilistic model are used to develop the procedure for making fatigue design decisions on the basis of minimum expected cost or risk function and reliability bounds. Selections of initial flaw size distribution, NDT, repair threshold crack lengths, and inspection intervals are discussed.
Document ID
19750048584
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hanagud, S. (Georgia Institute of Technology Atlanta, Ga., United States)
Uppaluri, B.
Date Acquired
August 8, 2013
Publication Date
May 1, 1975
Subject Category
Quality Assurance And Reliability
Report/Patent Number
AIAA PAPER 75-766
Meeting Information
Meeting: AIAA, ASME, and SAE, Structures, Structural Dynamics, and Materials Conference