Characterization of Advanced Composite Materials MSE 597 Junior/Senior/Graduate Students Lecture-Laboratory Course

Today: R&T delivery to A380. Some examples of successful research Centre wing box in CFRP New four post main landing gear ( wheels configuration) Full double deck fuselage Horizontal tail plane designed for relaxed stability New front Fuselage concept Upper fuselage skin in GLARE Dual air conditioning pack concept Variable frequency power generation 2 hydraulic (5000psi) + 2 electrical channel architecture for flight controls and landing gear Electro-hydraulic actuators Integrated and modular avionics architecture (IMA) On board maintenance system Skin to Stringer Welding (first on A318) Automated wing assembly Bonded metallic outwing box Flap vortex generators Extensive use of Knowledge Based Engineering High Re (Reynolds Number) Wing Design Carbon Composite Section 19 Technologies have to be developed generally and then applied on products

Today’s Test and Certification Methodology

Figure 4- Laminate Construction In. Thick Ply In. Diameter Carbon Fiber Fibers appear as ovals because they were cut at an angle to the 0º direction. Unidirectional Fiber Prepreg Laminates

Composite Principal Coordinate System

Characterization with electrical resistance stain gages

Composite Laminate Tensile Tests

Course Description The characterization of advanced composite materials is a combined lecture/laboratory course in which polymeric composite laminates will be fabricated of carbon fiber epoxy and subjected to classical test methods appropriate to the determination of the anisotropic, thermoelastic properties. Properties measured will include thermal expansion coefficients, anisotropic elastic constants, biaxial strength properties and interlaminar fracture strengths. The autoclave processing of composite laminates will be discussed and the consolidation, degree of cure and glass transition temperature of the polymeric matrix will be modeled. Microscopic analysis of the composite will be carried out to observe microstructure and measure composition fractions. Lectures will precede each experiment.

Laboratory Experiments Fabricate Graphite Epoxy Laminates Microscopic Determination of Volume Fractions Uniaxial Tension Test: Strength and Modulus Off-Axis Tension Test: Biaxial Strength Shearing Property Test Thermal Expansion Properties: Anisotropic Laminate Tension Test: Strength and Modulus Mode I Interlaminar Fracture Mode II Interlaminar Fracture

Course Format Wednesday –Lecture(1 hour) Thursday- Laboratory Prep(1 hour) Friday Morning Laboratory(3 hours) Laboratory Reports and Final Exam