Abstract
This work presents a new approach for determining the fracture toughness and bridging law of asymmetric double cantilever beam (ADCB). A key advantage of this method is that it eliminates the need for real-time monitoring of crack length and extra experiments to obtain elastic parameters, thus reducing potential errors from different test operators. Through force analysis, formulations are derived for compliance, energy release rate and relative sliding displacement at the pre-crack tip. The corresponding bridging stress is determined by the J-integral method. To validate the proposed method, the obtained results are compared with experimental data from various data reduction methods, including the modified beam theory (MBT) and modified elastic beam theory (MEBT). Notably, the results from the proposed method show strong alignment in fracture toughness values and bridging laws with those obtained through alternative methodologies. Furthermore, numerical modeling for the delamination using a tri-linear cohesive constitutive law is conducted to provide additional validation.
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