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Showing 1 to 20 of 44 for “"Plate model"”.
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On the Use of Shearing Interferometry for Slope and Curvature Measurements of Thin Plates
… for the slope and curvature measurement of thin plates. Several methods are proposed for a plate model with a specularly reflecting surface. Slope contours are also obtained for a diffusely reflecting model.
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Vibration Analysis of a Composite Wing Box with Arbitrarily Shaped Spars and Ribs
… mass of the structure. An equivalent continuum plate model of a wing box using energy formulations is proposed at the preliminary design stage to reduce the high and costly CPU time incurred from the optimization of finite element models. In the present plate model, the bottom and top skins of …
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Modelling the sound insulation of corrugated roof structures : an extended transfer matrix approach
… of corrugated dual leaf roof structures. A model of periodically connected plates, using Fourier expansions, was derived independently and extended in this work to include the stiffness of connectors and orthotropic plates, and intermediate beams in the framework of the structure. The same …
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Thermal-fluid modeling of the Missouri S&T reactor
<p>"Thermal-fluid modeling of the Missouri University of Science and Technology Reactor (MSTR) was carried out using a computational fluid dynamics code (CFD), STAR-CCM+. First, a three-dimensional parallel-plate model was developed, and the cosine-shaped heat flux was applied to the MSTR core. …
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Light gage steel folded plates
A light gage steel folded plate model structure was fabricated and tested under a uniform pressure to determine the relative stiffness of this type of structure. Deflections at mid and quarter spans were measured and compared with values determined by a rational method of analysis. A different …
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The Effect of Butterfly Inspired Scales on Wing Tip Vortex Development
… of the Monarch butterfly wing tip scales. Two models were developed, a flat plate baseline case and a scale plate model where the LE of the plate was lined with a singular row of 3D printed, butterfly inspired scales. The LEVs generated by both plates were compared in an experiment where the …
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Variational Modeling of Ionic Polymer-Based Structures
… we present a variational approach to the dynamic modeling of structures which incorporate ionic polymer materials. The modeling approach requires a priori knowledge of three empirically determined material properties: elastic modulus, dielectric permittivity, and effective strain coefficient. …
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Size-dependent Electroelastic Properties of Piezoelectric Nanoplates
… aims to develop modified continuum mechanics models with the consideration of the surface effects and the flexoelectricity to theoretically investigate such size effects. Based on the classical Kirchhoff plate model and the extended linear piezoelectricity theory, the influence of …
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Buckling and growth of disbonds in honeycomb sandwich structure
… disbond growth and, consequently, models of buckling and disbond growth were developed. All of the models decoupled the face-sheets of the sandwich and treated the core as a spring foundation having a stiffness determined from equilibrium of a two-dimensional orthotropic solid. A …
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Nonlinear dynamic behaviour of joined lightweight structures
… the linear and nonlinear behaviour of beams and plates under dynamic loads. Additionally, it aims to provide a thorough understanding of the interaction between the frictional joint and the joined part. To this end, a new model for the joint has been suggested. It is intended to bridge the gap as …
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Multi-objective topology optimization for trabecular bone-like structure: role of stability and surface area
… stability. We use a classical rectangular plate model with uniform external load to demonstrate that the complexity of the resulting structure is driven by the optimization criteria rather than a specific domain geometry or loading pattern. We show that compliance minimization alone is …
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Excitation of wave packets and random disturbances in a boundary layer
… VPI & SU low turbulence wind tunnel. The flat plate model was constructed from an aluminum-paper honeycomb laminate and an aluminum leading edge with an elliptical profile. A theoretical model was developed to verify the random and step-function-form motion of the vibrating ribbon. In the case …
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The crustal structure and subsidence history of aseismic ridges and mid-plate island chains
… subsidence history of aseismic ridges and mid-plate island chains. Analysis of gravity and bathymetry data across the Ninetyeast and eastern Walvis Ridges indicates these features are locally compensated by an over thickening of the oceanic crust. Maximum crustal thicknesses are 15-30 km. The …
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Efficient Methods for Structural Analysis of Built-Up Wings
… the conclusion that physics-based high-fidelity models need to be used as early as possible in the design of its products. At the preliminary design stage of wing structures, though highly desirable for its high accuracy, a detailed finite element analysis(FEA) is often not feasible due to the …
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Spectral Element Analysis of Bars, Beams, and Levy Plates
… development and coding of a Levy-type spectral plate element to analyze the harmonic response of simply supported plates in the mid to high frequency range. The development includes the governing PDE, displacement field, shape function, and dynamic stiffness matrix. A two DOF spectral Love bar …
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Hydroelastic stability and wave propagation in fluid-filled channels
… analysis is performed for flow between linear plates, this is a limiting case of the wall configuration in Chapter 2. Roots of the dispersion relation are found and their stability and direction of propagation determined. Chapters 4 and 5 focus on the propagation of nonlinear waves on liquid …
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Hydroelastic stability and wave propagation in fluid-filled channels
… analysis is performed for flow between linear plates, this is a limiting case of the wall configuration in Chapter 2. Roots of the dispersion relation are found and their stability and direction of propagation determined. Chapters 4 and 5 focus on the propagation of nonlinear waves on liquid …
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Hydroelastic waves and their interaction with fixed structures
… with fixed structures. A thin floating elastic plate model is considered which primarily represents a continuous floating ice sheet, but may also be applied to very large floating platforms. The incident hydroelastic waves are assumed to either propagate from long–distance towards the structures …
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Large Deflection Inextensible Beams and Plates and their Responses to Nonconservative Forces: Theory and Computations
… of aerospace structures. Here, a new beam and plate model is derived using Hamilton's Principle to lay the structural framework for a nonlinear, large deflection aeroelastic model. Two boundary conditions of the beam are explored: cantilevered and free-free. For a plate, the cantilevered …
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Addition of a Stanton Gauge to the Boundary Layer Data System
… Tab", can therefore be used on an aerodynamic model or aircraft surface without alteration of the surface. The Flow Tab is thus particularly well-suited to use with Cal Poly's Boundary Layer Data System (BLDS), a small, self-contained instrument that can be installed onto a model or aircraft …
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