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Showing 1 to 20 of 74 for “"fiber reinforced composite"”.
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Fatigue Behavior Of Continuous Fiber-Reinforced Composite Beams
… taken to evaluate the fatigue behavior of glass fiber-reinforced composite beams. Due to their highly anisotropic properties, composite beams have different failure modes at different stages of fatigue life. The results of the four-point bending fatigue tests show that the material follows …
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A Novel Fiber-Reinforced Composite Bridge Structural System
An integral fiber reinforced plastic bridge structural system is proposed. The design concept is carefully engineered to incorporate new high performance structural materials. As a result, a number of special features evolved to produce an efficient bridge design. Along with structural system …
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Pulsed-Laser Ultrasound Generation in Fiber-Reinforced Composite Material
… pulsed laser for stimulating ultrasonic waves in fiber-reinforced composite materials is the subject of investigation. For convenience, the material is chosen to be homogeneous transversely isotropic. The study is strictly limited to the laser power regimes that are suitable for nondestructive …
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Monitoring Progressive Damage Development in Laminated Fiber Reinforced Composite Materials
With increasing applications of composite materials, their health monitoring is of growing importance in engineering practice. Damage development in composite materials is more complex than for metallic materials, because in composite materials (a) multiple damage modes are simultaneously in play, …
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Compressive strength of lamina reinforced and fiber reinforced composite materials
… on the compressive strength of lamina reinforced and fiber reinforced composite materials when loaded parallel to the reinforcement. An analytical model which replaces the fiber reinforced composite with a laminate containing initially curved laminae has been proposed. By applying the …
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Thermographic detection of damaged regions in fiber-reinforced composite materials
The applicability to composite materials of a particular NDI technique, vibrothermography, is studied. With this technique, specimens are excited with a high power, low frequency ultrasonic shaker while the specimen is monitored with an infrared camera. Once temperature patterns are developed, …
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Analysis of fiber-reinforced composite plates utilizing curvilinear fiber trajectories
… located circular holes were manufactured using a fiber placement technique. With two plates the fibers were steered around the holes in curvilinear trajectories. With the two other plates the fibers were placed in the conventional straight line format. For the case of the curvilinear trajectories, …
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Dynamic response evaluation of fiber-reinforced composite bridge decks and bridges
Fiber Reinforced Polymer (FRP) composite bridge decks are gaining attention of bridge owners because of their light self weight, corrosion resistance and ease of installation. The lighter weight and lower stiffness of the FRP decks combined with the lower level of damping (than concrete) can lead …
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Development and evaluation of glass fiber-reinforced composite/wood railroad crossties
… crossties are strengthened by wrapping glass fiber reinforced composites (GFRC). In addition, durability of crossties has been found to have enhanced by reinforcing them with GFRC wraps. In order to reduce the cost, GFRC wraps are not used to wrap the entire length of a crosstie, but only in …
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Stiffness reduction resulting from transverse cracking in fiber- reinforced composite laminates
Several damage modes, including fiber breakage, delamination, and transverse cracking, have been observed to contribute to the mechanical degradation of fiber-reinforced composite laminates. In this investigation, the effect of transverse cracking on laminate stiffness was studied. Four. …
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Fiber fracture in continuous-fiber reinforced composite materials during cyclic loading
The final tensile fracture of any composite structure is primarily due to the failure of its constituents, namely fibers and matrix in the present case. To date, no experimental data exists, to the author’s knowledge, to define the behavior of constitutive fibers of a composite structure throughout …
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Feasibility of fiber reinforced composite materials used in highway bridge superstructures
Composite materials are considered here as structural materials of highway bridge superstructures. Bridge deck designs can be done according to <i>AASHTO</i>¹ specification and elastic design concepts. In order to evaluate the feasibility of composites as structural materials of highway bridge …
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Investigation of cork as filler for fiber-reinforced composite material in kayaks
… of ways in which cork can be incorporated into composite material for boats and kayaks without significant performance losses. Fiberglass lay-ups (cloth, mat, and epoxy) and cork-epoxy samples are prepared by vacuum bagging. Samples undergo a three-point bending test (ASTM D79o) and a Charpy …
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Damage Development in Static and Dynamic Deformations of Fiber-Reinforced Composite Plates
… analyze coupled thermomechanical deformations of composites has been developed. It incorporates geometric nonlinearities, delamination between adjoining layers, and damage due to fiber breakage, fiber/matrix debonding, and matrix cracking. The three damage modes are modeled using the theory of …
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Durability of fiber-reinforced composite wrap system for the rehabilitation of concrete structures
… was the investigation of the durability of composite materials employed for rehabilitation of concrete bridge piers. Standard concrete cylinders (4&inches; x 8&inches; in dimensions) wrapped with 1 layer of glass fabric embedded in an epoxy resin matrix were used to simulate the field …
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Self-sealing of thermal fatigue and mechanical damage in fiber-reinforced composite materials
Fiber reinforced composite tanks provide a promising method of storage for liquid oxygen and hydrogen for aerospace applications. The inherent thermal fatigue of these vessels leads to the formation of microcracks, which allow gas phase leakage across the tank walls. In this dissertation, …
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Video and laser microscopy investigation of adhesive joint fracture in fiber reinforced composite materials
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996.
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Fatigue damage mechanisms in fiber reinforced composite materials including the effect of cyclic loading frequency
… to characterize fatigue damage mechanisms in fiber reinforced composite materials, accounting for the effect of cyclic loading frequency, is presented. A many faceted approach to the investigation was utilized; which included well documented strain-controlled fatigue tests, a scanning electron …
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