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Flaw Growth Thresholds in Composites
A new generation of composites-intensive aircraft designs promises to
dramatically accelerate the growth of a market currently valued at more than $7 billion (USD).
The objective of this research program is to propose experimental and modeling
methodologies to determine endurance limit for damage onset in composite based on
fracture mechanics and fatigue crack initiation monitoring using wave mode propagation
based on Modal Acoustic Emission new approaches (MAE). Through an analysis of the
guided wave mode propagation and signal contents, the approach will be developed to
determine the endurance limit related to the onset of delamination and cracks initiation in composite materials, as function of cyclic loading and environmental conditions related to
temperature and humidity. Analytical and numerical modeling tools will be performed to
predict delamination onset and growth. Crack propagation of the starting delamination will be
modeled by the Virtual Crack Closure Technique and Cohesive Zone method. Experimental
procedures and analytical model will be proposed to determine composite stiffness loss….TOBECONTINUED
Faculty Supervisor:
Anh Dung NGO;Ahmed Maslouhi;Rajamohan Ganesan
Student:
Partner:
Bell Helicopter Textron Canada (Inactive);Pratt & Whitney;Consortium de recherche et d'innovation en aérospatiale au Québec;Bombardier Aeronautic Inc (Saint-Laurent, QC)
Discipline:
Engineering
Sector:
Manufacturing; Transportation and warehousing
University:
Concordia University; École de technologie supérieure; Université de Sherbrooke
Program:
Accelerate
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