Multi-level analysis of low-cost Z-pinned composite joints: Part 2: Joint behaviour |
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Authors: | Javier Toral Vazquez,Bruno Castanié ,Jean-Jacques Barrau,Nicolas Swiergiel |
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Affiliation: | aUniversité de Toulouse, INSA, UPS, Mines d’Albi, ISAE, ICA (Institut Clément Ader), France;bINSA, 135 Avenue de Rangueil, 31077 Toulouse, France;cEADS IW, 8 rue Marius Terce, 31300 Toulouse, France |
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Abstract: | In the framework of the E-U program ALCAS (Advanced Low-Cost Aircraft Structure), a new Z-pinning technique was developed by EADS Innovation Works. This technology was used to manufacture low-cost Z-pinned junction demonstrators (L and T shaped specimens) typical of aeronautical structures. In order to understand load transfer mechanisms in this kind of assembly, a multi-level analysis was performed. In the first part of this study, tension and shear pin behaviour was investigated as well as pin pull-out from neat resin or laminate. An analytical model was proposed to predict the maximum load capability of a single pin for an insertion depth of less than 8 mm which correspond to the usual technology. Now, in this second part, we demonstrate that the behaviour of the junction under pull-out, shear and unfolding is globally homothetic to the mechanical behaviour of a pin. This study provides the basis for a pre-sizing methodology for Z-pinned junctions under complex loading. |
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Keywords: | A. 3-Dimensional reinforcement B. Stress transfer E. Joints/joining |
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