Quanntitative Nondestructive Evaluation and Relability Assessment of the Aging Aircraft Structure Components

Period of Performance: 07/19/1999 - 07/19/2000


Phase 1 STTR

Recipient Firm

Smart Material Design
980 Half Day Road
Highland Park, IL 60035
Principal Investigator
Firm POC

Research Institution

University of Illinois, Chicago
809 S Marshfield RM 608
Chicago, IL 60612
Institution POC


The objective of this project is to develop new technology for the probabilistic reliability assessment of the aging aircraft structure based on the output of novel nonlinear acoustic instrumentation to be developed The technology will be based on: 1. Novel (to be fabricated) nonlinear acoustic instrumentation for the detection and investigation of fatigue and/or corrosion damage in aircraft structural components. 2. Information (constant record or maintenance inspections) about aging damage collected with help of the developed nonlinear acoustic instrumentation mentioned in item 1. 3. Probabilistic reliability assessment of the aircraft structure components based on the information collected in item 2. Crack propagator concept CP (probability of crack formation between any two points) (1) and Monte-Carlo simulations will be used for the development of probabilistic model. Once a CP has been evaluated for the particular problem (part geometry, loading and envir9nmental conditions) the probabilities of crack initiation1 crack size, toughness parameters, time to failure can be readily computed (illustrative examples in [l]