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Showing 1 to 20 of 31 for “"Composite Sandwich"”.
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Quality in composite sandwich fabrication
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1994.
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Compressive behavior and failure of composite sandwich panels
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Impact resistance and damage tolerance of composite sandwich panels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
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Fabrication and Structural Performance of Random Wetlay Composite Sandwich Panels
… sheets that can be compression molded into composite panels at little cost. By utilizing these 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 …
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Permeability and Flammability Study of Composite Sandwich Structures for Cryogenic Applications
… and service parameters on the susceptibility of composite tanks to develop excessive permeability to cryogenic fuels. Efforts will be expended on developing the materials and structural concepts for the cryogenic tanks that can meet the functional requirements. This will include consideration for …
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Effect of Aerogel on the Thermal Performance of Corrugated Composite Sandwich Structures
… The application of these materials into composites can result in enhancing a material's thermal and mechanical properties when exposed to mechanical testing.</p> <p>The main objective of this study was to perform theoretical and experimental analysis on a corrugated composite sandwich …
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Effects of Delamination on Composite Sandwich Structures Under Static and Fatigue Loading
… the 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 …
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Anomaly edge effects in thermographic nondestructive testing of polymeric composite sandwich panels
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.
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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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Effects of Seawater on the Mechanical Behavior of Composite Sandwich Panels Under Monotonic Shear Loading
… degradation to the materials themselves. Composites are better suited for this environment due to their high strength to weight ratios and their corrosion resistance, but very little is known about the fracture mechanics of composites. The goal of this study is to gain a better …
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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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MULTI-SCALE MECHANICS OF COMPOSITE SANDWICH STRUCTURES WITH BIOLOGICALLY INSPIRED FIBER REINFORCED FOAM CORES: A POTENTIAL TEMPLATE FOR DEVELOPING MULTIFUNCTIONAL STRUCTURES
… modeling 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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An Investigation of Damage Arrestment Devices Application with Fastener/Hole Interaction
… application interacts with a fastener in a composite sandwich panel. The primary objective of the damage arrestment device was to prevent the failure of the composite face sheet, such as crack propagation, around the hole/fastener joint. The damage arrestment devices are made of composite …
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Analysis and fabrication of paraboloidal CFRP sandwich mirrors.
… aerospace applications has driven the study on composite mirrors for several years. For example, the primary parabolic mirror in a balloon-borne, Cassegrain telescope required an optical quality better than 30 microns in figure RMS error. A parametric study on composite sandwich mirrors was …
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Simultaneous Energy Harvesting and Vibration Control via Piezoelectric Materials
… The motivating application is a multifunctional composite sandwich wing spar for a small Unmanned Aerial Vehicle (UAV) with the goal of providing self-contained gust alleviation. The basic idea is that the wing itself is able to harvest energy from the ambient vibrations along with available …
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The Effect of a Low-Velocity Impact on the Flexural Strength and Dynamic Response of Composite Sandwiches with Damage Arrestment Devices
… or measure. A constant concern in the field of composites is the effect of foreign object impact damage because it is often undetectable by visual inspection. An impact can create interlaminar damage that often results in severe reductions in strength and instability of the structure. The main …
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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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Durable Sandwich Structure Joining Technology for NASA's Ares V Launch Vehicle
Joining of uniformly-curved composite sandwich panel segments, typical in state of the art aerospace launch vehicles, should be mass-efficient. Adhesively bonded joints can provide increased mass-efficiency over mechanically-fastened joints. But, due to manufacturing sensitivities and certification …
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Torsional and flexural control of sandwich composite beams with piezoelectric actuators
… was developed 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 …
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Effect of Sustainable and Composite Materials on the Mechanical Behavior of Sandwich Panels Under Edgewise Compressive Loading
… industry has gradually shifted from metals to composites in many different applications due to the lightweight properties of composite materials. Some benefits of composites include higher strength-to-weight ratio and corrosion resistance. At this point in time, the composite industry …
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