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Testing and simulation of a bolted and bonded joint between steel deck and composite side shell plating of a naval vessel

机译:舰船甲板与复合材料舷侧板之间的螺栓连接接头的测试和模拟

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摘要

This paper describes the large-scale testing and the finite element simulations of the collapse of a steel-composite joint, both bolted and bonded. The joined structures are typical ones of shipbuilding and namely of naval ships. Composite superstructures, beside a valuable weight reduction, may improve the signature features of the ship by embedding installed electronic devices into a composite mast. In the frame of a broader research project, including the electromagnetic characterization of the composite structures, also the structural design and its optimization were exploited, embracing, among other issues, the joining solutions between the steel deck structures to the composite ones of the superstructure side shell. A large-scale specimen of the joint was conceived and collapse tested while, in parallel, design simulations were carried out at different levels of detail. Eventually, a complete description of the collapse of the joint, including the nonlinear simulation by finite element analysis of the progressive failure of the composite laminates of the side shell was obtained and test results were used to validate the numerical models.Depending on the design stage, various scantling procedures, from a very simplified one to a rather complex and time-consuming numerical analysis, can now be applied to verify the structural behavior of these steel to composite joints as well as to select the most cost-effective solution among several options.
机译:本文描述了螺栓连接和粘结连接的钢-复合材料接头塌陷的大规模测试和有限元模拟。连接的结构是造船即海军舰船的典型结构。复合材料上层建筑除了可减轻重量外,还可以通过将已安装的电子设备嵌入复合材料桅杆中来改善船舶的特征。在包括复合结构的电磁特性在内的更广泛研究项目的框架内,还对结构设计及其优化进行了研究,其中包括钢甲板结构与上部结构侧的复合结构之间的连接解决方​​案等问题。贝壳。设想了一个大型的关节标本并进行了坍塌测试,与此同时,在不同的细节级别上进行了设计模拟。最终,获得了对接头坍塌的完整描述,包括通过对侧壳复合层压板的渐进破坏进行有限元分析的非线性模拟,并使用测试结果来验证数值模型。 ,现在可以应用各种尺寸方法,从非常简化的方法到相当复杂且费时的数值分析,来验证这些钢到复合材料接头的结构性能,并在几种选择中选择最具成本效益的解决方案。

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