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Showing 1 to 20 of 61 for “"Polymer Matrix Composites"”.
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Nanotube reinforced thermoplastic polymer matrix composites
… make nanotubes attractive reinforcements for polymer matrix composites. However, the structure that makes them desirable also causes highly anisotropic properties and limited reactivity with other materials. This thesis isolates these problems in two separate studies aimed at improving …
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Integrated degradation models for polymer matrix composites
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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High temperature degradation mechanisms in polymer matrix composites
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Thermal regulation of vascularized fiber-reinforced polymer matrix composites
Fiber reinforced polymer matrix composites (PMC) possess outstanding structural properties, including high strength and stiffness, low weight, long fatigue life, and excellent manufacturability of complex geometries. However, their application is still limited where high temperature service is …
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Investigation of strain rate sensitivity of polymer matrix composites
… investigation into high strain rate behaviour of polymer composites was performed by developing a finite element model for a fibre reinforced polymer (FRP) plates impacted at varying strain rates. The work was divided into three facets, firstly to characterize the FRP material at varying strain …
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Rapid manufacturing of high-performance fiber-reinforced polymer matrix composites
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Structural Integrity of Polymer Matrix Composites Exposed to Fire Conditions
Polymer matrix composites (PMC's) perform well under many loading conditions and situations. Exposure of PMC's to fire is a concern due to their inherent material degradation at elevated temperatures. The elevated temperature response of PMC's to combined thermal and mechanical loads are especially …
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Altering the fiber-matrix interphase in semicrystalline polymer matrix composites
When many semicrystalline polymers are used as matrix materials in composites, a morphology known as the transcrystalline region is formed on the surface of the reinforcing material. This region introduces a new crystalline structure to the system that is different from that of the bulk matrix …
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Mechanical response of polymer matrix composites using indentation stress-strain protocols
Polymer Matrix Composites (PMCs) are an important material for many advanced applications due to their potential to combine critical mechanical properties with a high strength-to-weight ratio necessary for advancing automotive and aerospace applications. Such materials have been studied extensively …
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Assessment of dielectric models and their application to polymer matrix composites
… of hollow ceramic spheres embedded in the epoxy matrix on the dielectric behavior of composite was investigated in the 100 Hz to 100 kHz range. It was found that the dielectric constant of epoxy matrix can be reduced by mixing the matrix with hollow ceramic spherical inclusions. To predict the …
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Stress rupture of unidirectional polymer matrix composites in bending at elevated temperatures
… and used to characterize unidirectional polymer matrix composites. The method. which makes use of very simple fixtures, led to coherent results. These results have been modeled using the large deflection of buckled bars theory (elastica) and it is possible to predict with good accuracy …
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Durability of Polymer Matrix Composites for Infrastructure: The Role of the Interphase
As fiber reinforced polymer matrix composites find greater use in markets such as civil infrastructure and ground transportation, the expectations placed on these materials are ever increasing. The overall cost and reliability have become the drivers of these high performance materials and have led …
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The Effect of Atmospheric Aging on a Hybrid Polymer Matrix Composites' Material Properties
… fibers reinforcing a high temperature epoxy matrix) of a next generation transmission line design were investigated in this research. In particular, the flexural performance (in both static and fatigue loading) of the composite which had been exposed to elevated temperatures for prolonged …
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Degradation of High Voltage Glass Fiber-Reinforced Polymer Matrix Composites by Aggressive Environmental Conditions
<p>Polymer matrix composites reinforced with either E glass or ECR glass fibers-reinforced are used in a variety of high voltage electrical applications because of their advantages like lower weight and cost. However, they can be damaged by aggressive in-service conditions such as high temperature, …
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Improving fatigue life predictions: theory and experiment on unidirectional and crossply polymer matrix composites
… presented by which fatigue life predictions of polymer matrix composites may be improved. First a "critical element", whose failure defines global failure of the material. is identified. The global stiffness changes of the specimen during a fatigue test are monitored and taken to be inversely …
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Structural health monitoring of polymer-matrix composites (PMCs) using embedded piezoelectric transducers: experimental and numerical approaches
… study and numerical modeling of smart Polymer-Matrix Composites (PMC) embedding ceramic and polymeric piezoelectric transducers. The primary objective was to enhance their intelligent functionality to establish experimental/numerical Structural Health Monitoring (SHM). The numerical …
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Accelerated tests of environmental degradation in composite materials
High temperature polymer matrix composites are key candidates for the structural components of proposed supersonic transport aircraft. The operational environment of these vehicles exposes the airframe to harsh conditions, including temperature extremes and moisture. These environments have been …
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Thermo-Mechanical Behavior of Polymer Composites Exposed to Fire
One of the most critical issues for Polymer Matrix Composites (PMCs) in naval applications is the structural performance of composites at high temperature such as that experienced in a fire. A three-dimensional model including the effect of orthotropic viscoelasticity and decomposition is developed …
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