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Showing 1 to 20 of 32 for “"Advanced composite materials"”.
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Forming of advanced composite materials
Two significant aspects of advanced composite material forming are examined. First, the fiber deformation of aligned fiber composites formed to double curvature parts is analyzed. Aligned fiber composite lay-ups were formed over hemispherical tools and the fiber deformation was mapped. The data …
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Strengthening of concrete members with advanced composite materials
… (CFRP) cables, whereas the second is by bonding composite straps on the tension side of the members. In the first investigation, a total of twelve partially prestressed concrete beams were tested. Nine of the beams were first subjected to loads large enough to cause considerable cracking and …
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Use of advanced composite materials for innovative building design solutions/
Advanced composite materials become popular in construction industry for the innovative building design solutions including strengthening and retrofitting of existing structures. The interface between different materials is a key issue of such design solutions as the structural integrity relies …
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Delamination dynamics and vibrothermographic-thermoelastic evaluation of advanced composite materials
… experimental testing of damaged composite plates, frequency dependent heat generation phenomena were observed. Local hot spots were formed around imperfection areas especially delaminations. Heat generation was also found to relate to the crack size. In order to explain the above …
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Production functions and cost models for fibers in advanced composite materials
… Institute of Technology, Dept. of Materials Science and Engineering, 1986.
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The formation of advanced composite materials over complex geometric shapes using inflated diaphragms
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Modeling and response analysis of thin-walled beam structures constructed of advanced composite materials
… mechanical and civil ones. With the advent of advanced composite material systems, there is a vital need to reformulate the classical theory of thin-walled beams in a wider framework. This dissertation is intended to incorporate several essential effects which have a considerable importance for …
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Application of acoustic emission sensing for the non-destructive evaluation of advanced composite materials
To evaluate the state of health of the composite, a real-time, in-situ acoustic emission (AE) damage detection system has been developed, where the monitoring of AE activity emitted from within a carbon/epoxy composite material (CFRP) is achieved using an all-fibre Mach-Zehnder interferometric …
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A study of tension, compression, and shear test methods for advanced composites
… of the literature pertaining to test methods for advanced composite materials has been carried out. Several test methods were discussed and compared for each of three areas of interest. These areas were uniaxial tension, uniaxial compression and in-plane shear. Test methods were selected for …
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A response surface for the complex modulus of composite materials
The significance of the role of advanced composite materials in many engineering applications is increasing.Environmental effects on the material properties of composites is an important aspect of design considerations . To determine the long term influence of the individual contributions of time, …
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Comparison of theory and experiment for flexural-torsional buckling of laminated composite columns
… extended to laminated bars fabricated from advanced composite materials. The purpose of this research is to provide a study and assessment of the extended theory. The focus is on flexural and torsional-flexural buckling of thin-walled, open section, laminated composite columns. Buckling …
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Mechanical and trajectory design of wearable Supernumerary Robotic Limbs for crutch use
… the weight of this SRL prototype, including advanced composite materials, efficient joint structure, and high-performance pneumatic actuators. The latter half of this paper characterizes the biomechanics of both traditional crutch-assisted and SRL-assisted ambulation, models this gait pattern …
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Structural acoustic analysis of shape memory alloy hybrid composite panels
Shape memory alloy (SMA) hybrid adaptive composites are a class of materials which combine the strain recovery and elastic properties transformation capabilities of SMA fibers with the structural characteristics of advanced composite materials. This study utilizes the Rayleigh-Ritz method and …
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A novel grid analogy for transversely loaded orthotropic plates
… deflections was 3% for plates in isotropic and advanced composite materials. The maximum error between predicted and experimental deflections for wood based composite plates was 20%.
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A three dimensional generalized finite element method for thin fibers embedded in a continuum
… of the behavioral mechanisms of Fiber Reinforced Composites poses a computational and implementation challenge to available Finite Element Methods (FEMs). Meshing a large number of arbitrarily distributed fibers in three dimensions and modeling damage mechanisms, while simultaneously accounting …
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Design analysis of single-span advanced composite deck-and-stringer bridge systems
The advantages of advanced composite materials (ACM) over conventional materials motivate their use in highway bridges for rehabilitation and replacement of structures. However, the complexity of the composites has created a need for simplified design analysis procedures that account for both the …
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Microfluidic flow-focusing device for the electrospinning of hollow polymer nanofibers
Polymer nanofibers hold much promise as advanced composite materials, and can be customized into matrices with special electrical, optical and biological properties. Electrospinning, which utilizes the destabilization of a fluid's surface in a strong electric field, has gained the most favor as a …
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Control of Dynamic Response of Thin-Walled Composite Beams Using Structural Tailoring and Piezoelectric Actuation
… integrating structural tailoring and adaptive materials technology and designed to control the dynamic response of cantilever beams subjected to external excitations is addressed. The cantilevered structure is modeled as a thin-walled beam of arbitrary cross-section and incorporates a number of …
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Development and verification of a resin film infusion/resin transfer molding simulation model for fabrication of advanced textile composites
… molding/resin film infusion processing of advanced composite materials. This computer simulation model is designed to provide aircraft structure and tool designers with a method of predicting the infiltration and curing behavior of a composite material component. For a given specified cure …
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Optimum design of precast bridge systems prestressed with carbon fiber reinforced polymers
The use of advanced composite materials (FRP) is rapidly growing and has exciting applications in bridge construction. These materials are light, have an excellent resistance to corrosion, and high strength. Because of these advantageous properties, structures reinforced with composite materials …
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