Limites de croissance des défauts dans
les composites
Flaw Growth Thresholds in Composites
Valeur totale/ Total value
$1,195,000
Années/ Years
3
Financé par CRSNG/ NSERC Funded
Statut/ Status
In preparation
Début du projet/ Start
Mise à jour/ Update
JUN-03-2010
No.
COMP-407
Chercheur principal et leader
industriel/ Principal Investigator and
Industrial Leader
Participant
Organisation/Organization
Ngô, Anh Dung
École de
Technologie
Supérieure
Colle, Alain
BHTC
Partenaires/ Partners
Organisation/Organization
École de
Technologie
Supérieure
Université
Concordia
Université de
Sherbrooke
Bell Helicopter
Textron Canada
limitée
L-3 MAS
Pratt & Whitney
Canada
Description du projet/ Project
Description
This project involves the development of
a methodolgy applicable to the safe
design of aeropace composite parts
taking into account the effects of
manufacturing on the fatigue life under
various operating conditions.
Objectifs/ Objectives
1) Develop an analytical and/or FEM
model(s) to predict strain/stress
threshold (no flaw growth) in a
composite laminate with seeded flaw.
1a) Model should allow prediction of
threshold for different flaw types,
temperature and humidity conditions
(70°F, 180°F, dry and wet), frequency
(7, 25 Hz) and loading mode (in-plane
and out-of plane) 1b) Model should
account for the effect of high frequency
loading combined with low frequency
loading.
2) Experimental validation of
analytical/FEM model 2a)
Characterization of matrix and fiber
materials (70°F, 180°F, dry and wet)
2b. Fatigue testing for different flaw
types, temperature and humidity
conditions (70°F, 180°F, dry and wet),
frequency (7, 25 Hz) and loading mode
(in-plane and out-of plane) to generate
S-N curves 2c) Fatigue Testing for
combination of low cycle and high cycle
3) Implement the model(s) into a
commercial code for industry
application.
