Fatigue damage and life evaluation of thick bi‐material double strap joints for use in marine applications

The present-day interest in the use of composite-steel joints primary marine structures requires an in-depth knowledge fatigue performance thick adhesive joints. This paper reports on experimental tests performed compliant (i.e., and ductile) based a two-component methyl-methacrylate unaged aged conditions. Bi-material double strap joint with bondlines is subjected to quasi-static loading, during which specimens are monitored by digital mage correlation infrared thermography techniques evaluate types extent damage that occur loading. S-N curve evaluated along its limit. It found fail due cohesive damage, hackles, disbond at adhesive-adherend interface delamination within composite. survived loading showed similar residual strength as were not loaded.