Fracture characterization of a bi-material bonded aluminum/CFRP joints under mixed-mode I plus II loading

Fracture characterization under mixed-mode I + II loading of bi-material bonded joints with aluminum-carbon fiber reinforced polymer (AL-CFRP) adherends was analyzed in this work. Five different and quite simple fracture tests were employed aiming to cover properly the complete mixed-mode I + II range and identifying a representative energy-based fracture criterion. A mode partitioning method lying on cohesive zone analysis was implemented, enabling the identification of strain energy mode I and mode II components for each type of test, which is relevant regarding the estimation of the energy-based criterion defining the fracture envelope of these bi-material joints.

Automated summary

This study analyzed the fracture characteristics of bi-material bonded joints with aluminum-carbon fiber reinforced polymer (AL-CFRP) adherends under mixed-mode I + II loading. Five different and simple fracture tests were used to cover the complete mixed-mode I + II range and identify a representative energy-based fracture criterion.