AN EXPERIMENTAL-STUDY OF THE BENDING BEHAVIOR OF CALL HYBRID COMPOSITES

The bending behavior and damage characteristics of CALL (Carbon fiber/ epoxy/AL Laminate) hybrid composites have been studied by moire interf erometry. The shear strain distribution along the cross-section and th e forms of damage of bending beams are obtained. The results show that the magnitude of the shear strain in a carbon/epoxy layer is obviousl y larger than that in a corresponding aluminum layer and the shear str ain distribution of a CFRP layer along the cross-section conforms basi cally to a parabolic distribution curve, as for the shear strain distr ibution in aluminum layers along the cross-section. Shear damage, eith er in the interfaces or in carbon-fiber/epoxy laminae, and tensile fai lure of CFRP laminae in the tension surface represent, respectively, t he damage forms of the longitudinal and transverse bending specimen.