In previous experimental investigations [1], the positive characteristics of hybridfiber reinforced polymer (FRP)-steel material systems in terms of energy absorptionwere analyzed in 3-point-bending tests on coupon scale. Depending on the specimenorientation and thus on the differing tensile or compressive loading of the respectivecomponents, a differing energy absorption was observed. For predominantcompressive loading of the FRP phase, some material systems have shown a higherenergy absorption compared to the reversed specimen orientation. To understand theobserved effect and the relevant damage mechanisms, a particular test methodconsisting of the combination of stepwise mechanical testing, digital image correlation(DIC) as well as intermediate microscopic and computer tomographic (CT) analysis isdeveloped in this study. The results of the DIC allows for the detection of the neutralstrain plane and its shift during the progressing deflection and damage. Based on thedata obtained, an estimation of the respective effects of the detected damagemechanisms on the change in the components loading situation is possible. Theseresults are discussed with respect to the phenomenological failure models given byPuck and Schürmann (see [2–4]) and provide a basis for further study.
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