Experimental Investigation of Widespread Delamination Damage to Composite Materials Caused by Radiant Heating
Technical Report,02 Oct 2009,24 Sep 2012
Applied Research Associates Panama City United States
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Three aerospace composite materials with quasi-isotropic layup were exposed to varied uniform radiant heating to evaluate the delamination damage caused by the thermal environment. Three classes of matrix resins were evaluated with IM7 carbon fibers epoxy 977-3, modified bismaleimide RM3002 and condensation polyimide AFR-PE-4. Thermal exposure was mild and indicative of a hydrocarbon pool fire at a standoff from the material. After exposure, the plates were machined into four-point bend and tensile samples and mechanically tested. Mechanical degradation in terms of tensile and flexural modulus and strength were documented as a function of exposure level. Microscopy of the machined sections was performed to document the observed damage.