A Review of Similitude Methods for Structural Engineering

Casaburo, Alessandro; Petrone, Giuseppe; Franco, Francesco; Rosa, Sergio De

doi:10.1115/1.4043787

Cited by 126 publications

(70 citation statements)

References 246 publications

(421 reference statements)

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“…There is an interesting question as to whether there is a principle of dynamic similitude that might apply, and what the process might be for obtaining the feed and speed parameters. There are no known principles of similitude for this particular situation, and some reason to believe [28,29] that it is impossible to scale all features of metal forming processes in general. If it was possible to develop a similitude approach to analogue modelling of BFSW, it would seem to require the development of a transport equation, perhaps along the lines envisaged by [28,29] (where the scaling factors for press forming were volume, mass, momentum, movement, energy, and others).…”

Section: Implications For Future Workmentioning

confidence: 99%

Flow-Based Anatomy of Bobbin Friction-Stirred Weld; AA6082-T6 Aluminium Plate and Analogue Plasticine Model

2020

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Material flow transportation around the rotating tool and the mass deposition at the backside of the tool are critical characteristics of friction stir welding. To achieve an optimized weld structure, the history of the plastic deformation needs to be identified with a flow-based elucidation. In this study, an analogue model was applied to evaluate the formation of a banded structure using the bobbin tool, with a focus on the interaction between the tool-workpiece. The flow visualization in plasticine analogue was validated in comparison with the aluminium welds. The plastic flow mechanism was visualized both, at the surface and the cross-section of the weld-seam. The cross-section of the weld shows the details of the formation of tunnel voids, caused by the failure of the flow regimes. A physical model of the material flow was proposed to explain the formation mechanism of the tunnel void as a discontinuity during the mass refilling at the rear of the tool.

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Section: Implications For Future Workmentioning

confidence: 99%

Flow-Based Anatomy of Bobbin Friction-Stirred Weld; AA6082-T6 Aluminium Plate and Analogue Plasticine Model

2020

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“…Coutinho et al [13] have presented an overview of the efforts done to build reduced scale models for structural engineering applications up to 2015. The recent paper from Casaburo et al [14] which covers the main similitude methods for structural engineering, where simple and complex structures from different engineering fields are discussed, expands the previous revision paper. In a more recent paper [15], the author surveys wind tunnel models designed by recurring to additive manufacturing technologies, including some aeroelastic models built to study steady and unsteady aeroelastic phenomena.…”

Section: Introductionmentioning

confidence: 85%

“…The topic of aeroelastic scaling is not new and significant efforts were made over recent decades. In fact, there are recent survey papers that cover the efforts carried out in aeroelastic scaling, but in general their focus are in broader subjects such as structural engineering [13,14] or aerodynamics [15]. Coutinho et al [13] have presented an overview of the efforts done to build reduced scale models for structural engineering applications up to 2015.…”

Section: Introductionmentioning

confidence: 99%

On the Design of Aeroelastically Scaled Models of High Aspect-Ratio Wings

et al. 2020

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Recently, innovative aircraft designs were proposed to improve aerodynamic performance. Examples include high aspect ratio wings to reduce the aerodynamic induced drag to achieve lower fuel consumption. Such solution when combined with a lightweight structure may lead to aeroelastic instabilities such as flutter at lower air speeds compared to more conventional wing designs. Therefore, in order to ensure safe flight operation, it is important to study the aeroelastic behavior of the wing throughout the flight envelope. This can be achieved by either experimental or computational work. Experimental wind tunnel and scaled flight test models need to exhibit similar aeroelastic behavior to the full scale air vehicle. In this paper, three different aeroelastic scaling strategies are formulated and applied to a flexible high aspect-ratio wing. These scaling strategies are first evaluated in terms of their ability to generate reduced models with the intended representations of the aerodynamic, structural and inertial characteristics. Next, they are assessed in terms of their potential in representing the unsteady non-linear aeroelastic behavior in three different flight conditions. The scaled models engineered by exactly scaling down the internal structure suitably represent the intended aeroelastic behavior and allow the performance assessment for the entire flight envelope. However, since both the flight and wind tunnel models are constrained by physical and budgetary limitations, custom built structural models are more likely to be selected. However, the latter ones are less promising to study the entire flight envelope.

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“…Casaburo et al. 22 provided a comprehensive review of similitude methods applied to structural engineering and their limitations, and also pointed out that new methods are needed to face the resolution of more complex structures made of several components.…”

Section: Introductionmentioning

confidence: 99%

A similitude for the middle-frequency vibration response of satellite solar array based on the wave coupling hybrid finite element–statistical energy analysis method

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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A similitude is proposed for the dynamic response analysis of a satellite solar array. It is defined by invoking the wave coupling hybrid finite element–statistical energy analysis method which is considered as an effective way to solve the wide frequency (especially middle-frequency) vibration response of complex structures. The scaling laws are then derived by looking for equalities in the structural responses. A numerical case involving an assembly of two plates is discussed to verify the proposed scaling laws. Moreover, the new similitude is applied to a simplified satellite solar array model. If the analysis frequency step is selected appropriately, it is shown that a complete similitude can be defined: it allows predicting the vibration response of satellite solar array and provides the possibility for the model test of complex structures.

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A Review of Similitude Methods for Structural Engineering

Cited by 126 publications

References 246 publications

Flow-Based Anatomy of Bobbin Friction-Stirred Weld; AA6082-T6 Aluminium Plate and Analogue Plasticine Model

Flow-Based Anatomy of Bobbin Friction-Stirred Weld; AA6082-T6 Aluminium Plate and Analogue Plasticine Model

On the Design of Aeroelastically Scaled Models of High Aspect-Ratio Wings

A similitude for the middle-frequency vibration response of satellite solar array based on the wave coupling hybrid finite element–statistical energy analysis method

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