Abstract
Mechanical strength of metal-polymer hybrid joints (Steel AISI304 – Glass fiber reinforced acrylic composite) by laser joining has been analyzed, considering the effect of different input parameters: geometry of the metal textured surface, processing temperature or laser irradiation times. Likewise, temperature in the metal-composite interface was measured and related with mechanical properties. Fracture analysis has shown the predominance of cohesive failure in the fracture for this joining configuration. Lap shear strength was strongly dependent on surface texturing, temperature and irradiation time. Optimization of the process allowed to obtain fully cohesive failure with shear strength over 20MPa, comparable to structural adhesive joints.
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