Effect of surface treatment cold-work hardening after adhesive curing on strength of adhesive lap joints

Abstract

Loading compressive stress into surface layer of thin sheets cause possibility of their deformations. The sand blasting of surface layer of adhesive lap joints after adhesive curing should cases such deformation that can reduce stresses in adhesive layer, so enlarge joint strength. The experimental tests and numerical calculations verify this hypothesis. The method of considering in numerical calculations the effect of surface treatment cold-work hardening was proposed. Made experimental tests and numerical calculations showed that the increase of strength of cold-work hardening lap adhesive joints may cause strength increase from a dozen or so to dozen percent.

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