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Showing 1 to 20 of 52 for “"sandwich structures"”.
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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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Sandwich structures with advanced facings
… advantages of two innovative designs of sandwich panels. The first design involves sandwich panels with a piece-wise thickness of the facings aiming at two possible outcomes: (I) improved the structural response, i.e. strength and stiffness, without increasing the weight of the structure …
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Impact Simulation and Analysis of Sandwich Structures
… cause catastrophic results. Several aerospace structures have been used to resist or absorb energy in the occasion of impact. Among these, a sandwich structure has advantages with high stiffness, strength to weight ratio, and its relatively cheap cost. However, finding the impact structural …
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Energy-absorbing sandwich structures under blast loaDing
… this work is to simulate non-uniform response of sandwich panels subject to blast loaDing This involves an investigation into the optimum design of a square-celled sandwich structure for energy absorption. Variables under investigation are the core and face sheet thicknesses of the sandwich …
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Thermal characterization of honeycomb core sandwich structures
Honeycomb core sandwich structures are an integral part of many of today's aerospace structures. When subjected to high-speed flight, thermal loading can induce significant stresses. The need for thermal properties to perform thermal stress analyses in these structures is the motivation behind this …
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Dynamic analysis of magnetorheological elastomer configured sandwich structures
… magnetorheological elastomers (MREs) and smart sandwich structures. An extensive review, covering existing smart materials and their applications, has highlighted that smart materials and structures can be applied to large scale structures. Comprehensive experimental tests have been carried out …
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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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Permeability and Flammability Study of Composite Sandwich Structures for Cryogenic Applications
… reusable space transportation systems primary structures including cryogenic tanks. A number of carbon and aramid fiber reinforced plastics have been considered for the liquid hydrogen tanks. Materials selection is based upon mechanical properties and containment performance (long and short …
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Experimental investigation and constitutive modeling of metallic honeycombs in sandwich structures
Traditionally, honeycomb sandwich structures are designed in the elastic range, but recent studies on the crushing of sandwich profiles have shown their potential in crashworthiness applications. Thin sandwich sheets also hold a promise for widespread use in automotive industry because standard …
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Effect of Aerogel on the Thermal Performance of Corrugated Composite Sandwich Structures
… experimental analysis on a corrugated composite sandwich structure integrated with aerogel insulation by studying its effective thermal conductivity. The aerogel material used was Pyrogel XT-E, a silica aerogel-based fiberglass insulation manufactured by Aspen Aerogels. Theoretical models of the …
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Effects of Delamination on Composite Sandwich Structures Under Static and Fatigue Loading
… experimental and numerical analysis of composite sandwich structures under monotonic and fatigue loading. The sandwich skins were made of fiberglass and the core used was a closed cell PVC foam. Initial delaminations were introduced into the sandwich structures during manufacturing to see the …
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Fabrication and analysis of nanoparticle-infused natural fibre honeycomb core in sandwich structures
Submitted in fulfillment of the requirements of Master of Engineering: Mechanical Engineering, Durban University of Technology, Durban, South Africa, 2023.
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Optimal Blast-Resistant Sandwich Structures with Transversely Isotropic, Elasto-plastic Polymeric Foams as Cores
… foam cores are widely used as core materials in sandwich panels subject to blast loads, where high strain rates of the order of 4000 /s are observed. Unlike metallic foams polymeric foams exhibit transversely isotropic response when tested in a laboratory setting. More specifically, they exhibit …
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Study of an advanced helmet liner concept to reduce TBI : experiments & simulation using sandwich structures
… of ABAQUS. Preliminary results using flat plate sandwich structures with rectangular channels show that the use of high density filler material results in higher levels of blast mitigation. The peak transmitted overpressure is substantially reduced, while the duration of the positive pressure …
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Additive manufacturing of sandwich structures using dual UV-thermal cured, continuous carbon fiber reinforced thermosetting polymer
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Improving Damage Tolerance of Composite Sandwich Structures Subjected to Low Velocity Impact Loading: Experimental and Numerical Analysis
<p>Sandwich structures with composite facing skins have seen applications in variety of sectors including aerospace and automobile, owing to their high specific mechanical properties. However, there is a need to develop better damage tolerant sandwich structures since conventional composite facing …
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Refined zigzag models for the response of general multilayered composite and sandwich structures: numerical and experimental investigations
L'abstract è presente nell'allegato / the abstract is in the attachment
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Numerical Methods for Predicting the Dynamic Crushing Response and Energy Absorption of Composite Aluminum Honeycomb Sandwich Structures
… responses of composite aluminum honeycomb sandwich structures were predicted using finite element analysis (FEA) software LS-DYNA by modeling the honeycomb as a material with anisotropic properties. The goal of the project was to develop a process for modeling the sandwich structure to …
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Experimental and numerical investigation of ballistic impacts: an introduction to novel polymer foam core sandwich structures and adaptive SPH formulation
Embargo set by: Colleen Fallaw for item 102576 Lift date: 2019-08-10T21:25:30Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system
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MULTI-SCALE MECHANICS OF COMPOSITE SANDWICH STRUCTURES WITH BIOLOGICALLY INSPIRED FIBER REINFORCED FOAM CORES: A POTENTIAL TEMPLATE FOR DEVELOPING MULTIFUNCTIONAL STRUCTURES
… approach for developing bio-inspired composite sandwich structures. The source of bio-inspiration was chosen to be Palmetto wood, a naturally occurring porous composite material with macrofiber reinforcement. Characterization of Palmetto Wood at multiple length scales revealed that the …
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