Studies on the transverse properties were made for the unidirectional composite under uniaxial loading. The unidirectional composites, with fibers regularly arranged in square pattern, have been known to display different mechanical behavior depending...
Studies on the transverse properties were made for the unidirectional composite under uniaxial loading. The unidirectional composites, with fibers regularly arranged in square pattern, have been known to display different mechanical behavior depending on the fiber/matrix interface characteristics. The present study employed finite element analysis technique, which enabled modeling of the unit-cell for the composite with different types of interface bonding. The stress-strain curves were obtained as a function of fiber volume fraction and bonding type. The resulting decrease of the elastic stiffness for the weakly-bonded composite was caused by the progressive debonding at the fiber/matrix interface with incremental loading.