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Showing 1 to 20 of 24 for “"Sandwich Beams"”.
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Static and dynamic analysis of sandwich beams.
Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1984 .D375. Source: Masters Abstracts International, Volume: 40-07, page: . Thesis (M.A.Sc.)--University of Windsor (Canada), 1984.
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Shear lag in truss core sandwich beams
… theoretical and measured stiffness of truss core sandwich beams. In previous studies, the measured values of stiffness in loading have proven to be 50% of the theoretical stiffness during three point bending tests. To test the effect of shear lag on this phenomenon, the beams' dimensions were …
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Dynamic Behavior of Sandwich Beams With Internal Resonators
<p>Dynamic behavior of sandwich beams with internal resonators was investigated. The effect of inserting spring-mass resonators into the sandwich core was theoretically analyzed and it was shown that a wave attenuation bandgap exists due to local resonance. Steady state experiments were used to …
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Failure of structural sandwich beams with metallic foam cores
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.
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Closed/Semi-Closed Form Solutions for Face/Core Debonds in Sandwich Beams
Sandwich beams are highly susceptible to debonding at the interface between face and core. These debonds can grow and eventually lead to complete failure of the structure. To understand and study such debonds analytically, an Elastic Foundation Analysis (EFA) can be used to incorporate the effects …
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Effect of properties of metallic foams on stiffness and strength of sandwich beams
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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The influence of time-dependent material behavior on the response of sandwich beams
… orbiting precision segmented reflectors, simple sandwich beam models are developed. The beam models included layers representing face sheets, core and adhesive. The issue of time-dependency is essential because the expected life of a reflector is on the order of 20 years. Using the principle of …
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Effects of Damage Arrestment Devices on the Fatigue Life of Impacted Composite Sandwich Beams
<p>The use of composite sandwich panels is rapidly increasing in the aerospace industry. In these applications, thin composite face sheets are typically co-cured to foam or honeycomb cores. One of the greatest concerns in these types of applications is face-core delamination because it can …
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Failure mode maps and minimum weight design for structural sandwich beams with rigid foam cores
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1987.
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Análise dinâmica das vigas sandwich comprimidas
… analyze the equations of lateral vibrations of sandwich beams with an axial compressive load, as well as the analysis of the instability loads by a dynamic method. Some cases, corresponding to several boundary conditions, were studied and the respective frequency equations were established. The …
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Analysis of Static and Dynamic Deformations of Laminated Composite Structures by the Least-Squares Method
Composite structures, such as laminated beams, plates and shells, are widely used in the automotive, aerospace and marine industries due to their superior specific strength and tailor-able mechanical properties. Because of their use in a wide range of applications, and their commonplace in the …
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Design of Sandwich Structures
Failure modes for sandwich beams of GFRP laminate skins and Nomex honeycomb core are investigated. Theoretical models using honeycomb mechanics and classical beam theory are described. A failure mode map for loading under 3-point bending, is constructed, showing the dependence of failure mode and …
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Análise estática e dinâmica de vigas sandwich pelo método dos elementos finitos
In view of the static and dynamic analysis of sandwich beams submitted to axial loads as well as for the determination of instability critical loads the Finite Element Method has been used in the present work. The developed elements are also applied to beams where the shear strain has been taken …
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Effect Of Impact Damage On Compression-Compression Fatigue Behavior Of Sandwich Composites
… fatigue behavior for a new sandwich structure made from E-glass/epoxy face sheets over end-grain balsa wood core. Low velocity impact tests were carried out using a drop-weight impact tower by impacting the sandwich beam at the center with energy level slightly higher than …
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Analytical and experimental study of FRP honeycomb sandwich panels with sinusoidal core
… have demonstrated that FRP honeycomb sandwich panels with sinusoidal core can be effectively and economically used for highway bridge deck systems. In this study, analytical and experimental characterizations are presented for a FRP honeycomb panel with sinusoidal core geometry in the …
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Piezoelectric-based in-situ damage detection of composite materials for structural health monitoring systems
… for more complex built-up structures such as sandwich beams, stiffened plates and composite cylinders.
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Torsional and flexural control of sandwich composite beams with piezoelectric actuators
… to predict the static response of composite sandwich beams subjected to loads induced by piezoelectric (PZT) actuators. The model was derived using Reddy's (1984) displacement field for a laminated plate which consists of cubic variation of the in-plane displacement through the thickness. In …
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The quasi-static and dynamic responses of metallic sandwich structures
Lattice materials are used as the core of sandwich panels to construct light and strong structures. This thesis focuses on metallic sandwich structures and has two main objectives: (i) explore how a surface treatment can improve the strength of a lattice material and (ii) investigate the collapse …
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Dynamic analysis of composite beams using shear-deformable finite elements
… to find the natural frequencies of composite beams. The first objective of the study is to derive the mass and stiffness matrices for the elements of interest and incorporate them into computer programs which can be used to estimate the natural frequencies of composite beams. Composite beams …
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Fabrication and Structural Performance of Random Wetlay Composite Sandwich Panels
… composite panels as the facesheets of honeycomb sandwich structures, it is possible to greatly increase the bending stiffness of the composite without adding significant weight. The random wetlay composite facesheets used in this research consisted of 25% E-glass fibers and 75% PET by weight. The …
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