Experimental identification of sources and mechanisms inducing residual stresses in multi-layered Fiber-Metal- Laminates

Abstract

In this paper the reduction of thermal residual interply stress in fiber metal laminates is focused which may significantly lower the mechanical properties of the laminate. At first, the necessity of stress reduction in different laminate configurations is discussed, enabling the evaluation of the benefit and the potential of specific configurations to lower their residual stress level. Different influencing factors are than considered and specific serial examinations are conducted on CFRP-UD-Steel specimens in fiber direc-tion, systematically modifying intrinsic and extrinsic factors during manufacturing. The impact of these parameters is then measured on the deflection of asymmetric specimens providing some promising ap-proaches to encounter manufacturing related thermal stresses in fiber metal laminates.