抄録
The unceasingly increasing establishment of composite materials in the manufacturing of structures intended for transport has given place to many studies in order to characterize their behaviour in a specific environment. One of the characteristics of these materials is the difficulty to visually detect the damage in the case of accidents such as dynamic collisions (tool drop, impact of flying debris...). Considering that it is difficult to avoid this kind of damage, it is necessary to appreciate the criticality of the caused defects, or in other words, to make sure that they are not detrimental to the structure during its life. This concern requires the set up of tests which consist, mainly, of impact tests in order to create the damage and loading representative of the ultimate load permitted by the structure (i.e. mostly by fatigue or quasi-static loadings). In the case of curved structures, such as laminated tubes, the main characterization test used is the CAI ("Compression After Impact") test . Therefore, the literature is quite rich concerning the set up of this kind of tests, as well as the results obtained. However, the Residual Tensile Strength After Impact (RTSAI) test is not used very often for this type of structures. The aim of the study, presented in this paper, is to determine the residual strength of pre-impacted curved panels stressed in tension. For each stage of the study, such as: i) impact testing, ii) non destructive testing and microscopic observation, iii) fracture in tension, a detailed description of the test methodology (i.e. sample preparation, device used ...) is presented. Experimental results obtained are presented and discussed in this paper.
