Cohesive laws of composite bonded joints under mode I loading

Mode I cohesive laws of carbon–epoxy composite bonded joints were obtained using the direct method applied to the double cantilever beam test. This method is based on the differentiation of the relation between the evolution of the strain energy release rate and the crack tip opening displacement (CTOD) during the test. An equivalent crack length method was used to obtain the strain energy release rate evolution. Following this procedure,...