GAIOTTI , Marco

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Il contributo che si intende presentare si propone di investigare la resistenza di pannelli sandwich in composito, le cui caratteristiche risultino compatibili con l'impiego nell'industria navale e nautica; l'interesse è focalizzato sull'influenza che ha il processo produttivo sulle proprietà meccaniche del laminato, con particolare riferimento...

This paper deals with the mechanical characterization of a composite sandwich material typically used in boating industry; skins are made of epoxy pre-preg fiberglass while core is made by syntactic foam obtained using epoxy resin as well. Actually, analytical and numerical simulations heavily rely on mechanical properties of materials but need...

The design of sail systems is a fascinating topic that naval architects have been facing since many centuries and nowadays is revived because of the increasing size of modern pleasure and racing yachts. It is hence surprising that empiricism largely drives mast and rigging design even at the present time. Actually, while structural dynamics is...

This paper deals with the buckling behavior of composite sandwich columns under compressive loading. Namely, finite element (FE) modeling strategies are discussed with the aim to test a suitable and cost effective solution for assessing the buckling behavior of delaminated sandwich laminates. Indeed, pleasure craft industry is now facing the...

This paper deals with the buckling strength of typical ship stiffened panels built in fibreglass composite laminates. The results obtained applying analytical formulations based on equilibrium and potential energy equations are compared with the ones obtained by linearised eigenvalue analyses of rather detailed finite-element models. Analytical...

The aim of this paper is to study the concept of shear lag effective breadth of plating, widely applied in the scantling assessments of metallic ship structures, for the special case of composite hull stiffened plating. Indeed, geometries and material behaviour are rather different and the definition of the effective breadth is worthy of...

Among recently introduced fatigue assessment approaches, the ones based on the notch stress intensity factor (N-SIF) concept appear to be very promising, both because of their theoretically soundness and because of the possibility of straightforward computation of parameters believed to govern the fatigue process. Actually, while such...

This paper deals with strength of composite sandwich panels typically used in pleasure boats and naval industry. The focus is on the influence of fabrication processes onto the mechanical behavior, namely onto buckling strength. Both, experimental and numerical analyses were carried out in the Ship Structures Laboratory of the University of...

The first part of this paper focuses on the mechanical characterization of fillers obtained by an experimental campaign specifically designed to obtain adequate information about coating products currently applied on yacht hulls. The final aim was to assess their structural behaviour as well as their interactions and effects onto the shell...

This paper describes the experimental and numerical studies carried out on delaminated fiberglass epoxy resin laminates made-up by different fabrication methods, namely by vacuum infusion and prepreg. While the tested specimens were originally intended for the assessment of buckling behavior of composite laminates of wind turbine blades,...

When using large models, building a comprehensive finite element (FE) numerical model able to simulate the portion of a containership whose extension in length is sufficient to properly evaluate combined loading effects is rather time consuming, and assigning proper boundary conditions representing the distribution of actual forces and moments...

tIn this work, the possible exploitation of fiber-reinforced composites in the context of maritime trans-portation of compressed natural gas (CNG) is investigated. In addition to a more conventional steelconfiguration, two different fiber materials, carbon and glass, are considered as construction materialsfor pressure vessels (PVs) to be...

This paper deals with the mechanical behavior under in plane compressive loading of thick and mostly unidirectional glass fiber composite plates made with an initial embedded delamination. The delamination is rectangular in shape, causing the separation of the central part of the plate into two distinct sub-laminates. The work focuses on...