The aim of this research is to design a telescopic hydraulic cylinder, normally used in industrial filed, made of different materials and in particular composite material instead of classical structural steel. Specifically it will refer to the application of this actuator on a dump truck and designated to the transport of soil material, starting from hard load conditions and from the minimum incline to guarantee the complete emptying of the dump truck, the geometry of the cylinder has been defined. The peculiarity of this research is about the materials employed for the design, and the future fulfilment of this component. The work deal with the custom of 4 different materials, or rather: 2 type of steel (structural: S235 JR and stainless AISI 304), aluminum alloy 7075-T6 (Ergal) and a composite material made of epoxy resin and carbon fibers. The elaboration of the new solutions presented, has been realized evaluating the barrel of the cylinder as a container in a pressure vessel with thin walled, whereas the rod as a beam prone to buckling. Is possible to observe how the study has been faced also with the aid of analysis about finite elements, as well as to verify the design of the component, also to prove others phenomena, as the instability for peak load. Moreover is possible to highlight that the adopted theory for the planning of composite barrel, despite load conditions are the same, they differs from the theory used for aluminum and steel because of his anisotropic behavior. Given the particular nature of the composite material, the arguments related with technology are set out, about technology production through filament winding and the assembly of the components of the telescopic cylinder. Thanks to the achieved results, is possible to observe how the use of the composite material, for the realization of that component, can be extremely favorable for the weight achieving a reduction of the 96% starting from 5537 N, reaching 196 N.

这项研究的目的是设计一种伸缩液压缸，通常用在工业领域，它由不同的材料制成，特别是由复合材料制成，而不是经典的结构钢。具体来说，将参考该执行器在自卸车上的应用，并指定用于土壤物料的运输，从硬载条件开始，并从最小倾斜度以确保自卸车完全排空，油缸的几何形状定义。这项研究的特殊性在于设计所用的材料以及该组件的未来实现。这项工作涉及4种不同材料的习惯，或者说：2种钢（结构：S235 JR和不锈AISI 304），铝合金7075-T6（Ergal）以及由环氧树脂和碳纤维制成的复合材料。评估提出的新解决方案的方法已经实现，它可以评估作为薄壁压力容器中的容器的圆柱桶，而将杆作为易于弯曲的梁来评估。借助有限元分析还可以观察研究的进行，验证组件的设计，还可以证明其他现象，例如峰值负载的不稳定性。此外，可能会强调，尽管载荷条件相同，但采用复合材料桶规划的理论，由于其各向异性，它们与用于铝和钢的理论有所不同。鉴于复合材料的特殊性质，提出了与技术有关的论据，关于通过灯丝缠绕和伸缩筒组件的组装进行技术生产。归功于所获得的结果，可以观察到复合材料的使用对于实现该组件如何极其有利，从而使重量从5537 N开始降低了96％，达到196N。