EVALUATION OF INTERFACE FAILURE THROUGH DIGITAL IMAGE CORRELATION INVESTIGATIONS

摘要

Interface damage characterization and interlaminar failure of sandwich specimens with one initial interlaminar delamination is done by using the digital image correlation method. Mode I tests reveal interesting particularities on damage localization and strain variation when damage is finalized. After analyzing the experimentally obtained results, we make comments on the four characteristic domains which describe the opening strains in the interface and in the core. The crack opening can be also measured when damage is finalized and crack grows further on.