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Article
Chlamydophila psittaci-negative ocular adnexal marginal zone lymphomas express self polyreactive B-cell receptors
The pathogenesis of Chlamydophila psittaci-negative ocular adnexal extranodal marginal zone lymphomas (OAEMZLs) is poorly understood. OAEMZLs are monoclonal tumors expressing a biased repertoire of mutated surfac...
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Chapter and Conference Paper
A Study of Microcracks and Delaminations in Composite Laminates
With the rapid increase of composite usage on aircraft primary structures, the damage of composite laminate and its nondestructive testing are of high interest to the aerospace industry. Composite laminates, t...
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Article
Open AccessThe bone marrow compartment is modified in the absence of galectin-3
Galectin-3 (gal-3) is a β-galactoside binding protein present in multivalent complexes with an extracellular matrix and with cell surface glycoconjugates. In this context, it can deliver a variety of intracell...
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Chapter
Shear Wave Ultrasonic Technique as an NDE Tool for Composite Laminates Before and After Curing
The highly anisotropic elastic properties of the plies in a composite laminate, especially those manufactured from unidirectional prepregs, interact strongly with the inplane vibration of shear ultrasonic wave...
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Chapter
Quantitative Measurement of Metal Loss Due to Corrosion in Aluminum Aircraft Skin
The detection and characterization of corrosion is one of the many challenges in the nondestructive inspection (NDI) of aging aircraft. A number of groups are pursuing ultrasonic techniques for the detection a...
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Chapter
Ultrasonic NDE Techniques and the Effects of Flaws on Mechanical Performance in Multi-Directionally Reinforced Textile Composites
Developmental efforts in composite technology have included a wide variety of secondary and primary structure in industries ranging from sporting goods to high performance aircraft. In addition to potentially ...
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Chapter
Measurement of Elastic Moduli in Ceramic Compacts and Ceramic Matrix Composites as a Function of Porosity Content
Longitudinal and transverse ultrasonic velocity measurements were made to obtain elastic moduli of ceramic compacts and continuous fiber ceramic composites (CMCC) as a function of porosity volume fraction. The...
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Chapter
Correlation of NDE Results with Fiber Density and Porosity Content in a Metal Matrix Composite
Many of the next generation, high performance metal matrix composites (MMC) and intermetallic matrix composites (IMC) are reinforced with continuous fibers1. The properties of such materials depend on the fiber d...
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Chapter
Ultrasonic NDE of Three-Dimensional Textile Composites
Composite materials represent the future of the defense, transportation and civil construction industries. These materials have been used extensively in recent years on applications varying from tennis rackets...
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Article
Nondestructive Characterization of Woven Fabric Ceramic Composites
Woven fabric ceramic composites fabricated by the chemical vapor infiltration method are susceptible to high void content and inhomogeneity. The condition of such materials may be characterized nondestructivel...
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Chapter
Investigation of Corrosion in Aluminum/Adhesive Lap-Splices Using Pulse-Echo Ultrasonic Techniques
Corrosion can exist in any layer of a simple aluminum/adhesive lap-splice. For lap- splices where only one aluminum surface is accessible, first layer corrosion is corrosion that occurs on or under the accessi...
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Chapter
Modeling Anisotropic Conductivity Behavior of SiCp/Al Metal- Matrix Composite Extrusions
Metal-matrix composites (MMCs) appear to be well suited for structural applications where high specific strength (strength-to-density ratio), high specific modulus (modulus-to- density ratio) and high-temperat...
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Chapter
Ultrasonic Scans Using Low Frequency Unresolved Echoes
When ultrasonic pulses are used to detect flaws that are near the surface or in thin-layered structures, the natural tendency is to use a narrow pulse. A broadband pulse with a high center frequency and a larg...
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Chapter
Effect of Particle Orientation on the Elastic Anisotropy of Al/SiCp Metal Matrix Composites
Metal matrix composites (MMCs) are promising new materials for structural applications because of their high specific stiffness and strength, and high temperature stability. Of particular interest are the disc...
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Chapter
Ultrasonic Beams with Bessel and Gaussian Profiles
A novel technique has been developed for generating ultrasonic beams with spatial profiles of amplitude governed by a truncated Bessel function or Gaussian function [1,2]. Bessel beams have very unique propert...
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Chapter
Elastic Moduli of Silicon Carbide Particulate Reinforced Aluminum Metal Matrix Composites
The mechanical properties of metal matrix composites (MMCs) reinforced by discontinuous silicon carbides are governed by the properties of the reinforcing phase, as well as their morphology (whisker vs. partic...
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Chapter
Area Function Imaging in Two-Dimensional Ultrasonic Computerized Tomography
In ultrasonic nondestructive evaluation (NDE) studies, impulse response is often used to evaluate internal defects. Under the far-field Born approximation [1], the impulse response can be written as the produc...
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Chapter
Design of a Unipolar Ultrasonic Pulser Generator and Receiver for Applications to Quantitative NDE
We recently developed and tested a prototype ultrasonic nondestructive test instrument that produces unipolar stress pulses in pulse-echo mode. The use of unipolar pulses instead of bipolar pulses offers signi...
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Chapter
Impact-Induced Delaminations in Thermoset and Thermoplastic Composites
Laminated fiber-reinforced composites are engineering materials with many desirable properties including high stiffness and strength. However, the lack of fiber reinforcement in the through-thickness direction...
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Chapter
Application of Gauss-Hermite Beam Model to the Design of Ultrasonic Probes
Work is currently underway to develop and test prototypic ultrasonic instrumentation that will produce unipolar stress pulses in a pulse-echo mode. The instrument will be used to detect and characterize flaws ...
