157 Result(s)
within
Xu** Song
Engineering
Characterization and Evaluation of Materials
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Chapter
A Technique of Short Uniaxial Stress Pulse
A technique of nanosecond stress impulse by plate impact with a light gas gun for study of dynamic response and damage mechanism of materials resulted from such as deposition of radiation beams is reported in ...
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Chapter
Ultrasonic Equivalent Flaw Sizing - A Time-of-Flight Approach
Ultrasonic equivalent flaw sizing is a method in which the size, shape, and orientation of a flaw is determined in terms of a best-fit simple shape, such as an ellipsoid (for volumetric flaws) or an ellipse (f...
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Article
Ultrasonic flaw classification in weldments using probabilistic neural networks
A probabilistic neural network is used here to classify flaws in weldments from their ultrasonic scattering signatures. It is shown that such a network is both simple to construct and fast to train. Probabilis...
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Article
Characterization of centrifugally atomized Al-12Si-5Fe-3Cu-1Mg(wt%) alloy powder and extruded rod
The Al-12Si-5Fe-3Cu-1Mg(wt%) alloy was rapidly solidified by centrifugal atomization. The microstructural characteristics of rapidly solidified powder and the microstructure changes with heat treatment were in...
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Article
Thermal activation analysis of ductile to brittle transition of polypropylene
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Article
Fatigue crack initaition and propagation from hole defects
The aim of this study is to investigate the interaction of two hole defects affecting fatigue crack initiation life and propagation behavior. The location of two hole defects was characterized by an angle of a...
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Article
Study on fracture strain of discontinuously reinforced metal matrix composites
The fracture strain of discontinuously reinforced metal matrix composites (DRMMCs) is studied according to a damage mechanics model proposed by McClintock, with a localized crack propagation hypothesis and par...
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Chapter and Conference Paper
Classification of Indoor Environmental Gases Using Temperature Modulation of Two SnO2 Sensing Films on a Substrate
Two SnO2 based sensing fllms(pure SnO2 and SnO2/Pt) and a Pt thin film for temperature sensor on an alumina substrate were designed and fabricated for classifying the indoor environmental gases. By controlling th...
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Chapter and Conference Paper
Fabrication of a 94 GHz LIGA Klystrino
The klystrino developed at Stanford Linear Accelerator Center (SLAC) is a micro-fabricated klystron being the high-power source of microwaves [1]. The ultra-deep (UD) LIGA process is adopted to fabricate the m...
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Chapter and Conference Paper
A 3-Voltage Actuated Micromachined RF Switch for Telecommunications Applications
In this paper, micromachined RF switch for telecommunications application is proposed. The switches are formed on the CPW(Coplanar waveguide) transmission lines and driven by the electrostatic force making the...
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Article
Effect of plastic zone on the fatigue crack propagation behavior between two fatigue cracks
In this study, the fatigue crack propagation behavior in the stress interaction field between two different fatigue cracks is studied by experiment and finite element analysis. In the experiment, the offset di...
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Article
Dynamic small strain measurements of a metal specimen with a split Hopkinson pressure bar
When a conventional split Hopkinson pressure bar (SHPB) is used to investigate the dynamic flow behavior of ductile metals, the results at small strains (ɛ≲2%) are not considered valid owing to fluctuations as...
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Chapter and Conference Paper
A Web-Based Optimization for Function Synthesis of Planar Linkage
A new web-based optimization method for function synthesis of planar linkage is developed. The technical features of this method are analyzed and a web-based design mode is confirmed, which combines the charac...
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Article
Modeling Ultrasonic Pulse-Echo Signals from a Flat-Bottom Hole in Immersion Testing Using a Multi-Gaussian Beam
This paper proposes an ultrasonic measurement model that can predict the pulse-echo signals from a flat-bottom hole in an isotropic, homogeneous solid specimen immersed in water in a computationally efficient ...
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Article
Dynamic stress equilibration in split Hopkinson pressure bar tests on soft materials
The condition of dynamic stress equilibrium is not satisfied automatically when a split Hopkinson pressure bar (SHPB) is employed to determine the dynamic properties of soft materials. In order to develop guid...
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Article
Modeling Angle Beam Ultrasonic Testing Using Multi-Gaussian Beams
This paper proposes a new approach to modeling angle beam ultrasonic testing that can predict pulse-echo signals, in an absolute and computationally efficient manner, from various reflectors in steel welded jo...
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Article
Loading and unloading split hopkinson pressure bar pulse-sha** techniques for dynamic hysteretic loops
Pulse-sha** techniques are developed for both the loading and unloading paths of a split Hopkinson pressure bar (SHPB) experiment to obtain valid dynamic stress-strain loops for engineering materials. Front ...
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Article
Fracture mechanics analysis of thermally tempered glass plate: fracture induced by an embedded crack
This paper presents a fracture mechanics analysis of a thermally tempered glass plate. The fracture is induced by an embedded penny-shaped crack. The analysis shows that the existence of a penny-shaped crack w...
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Article
Upper limit of constant strain rates in a split Hopkinson pressure bar experiment with elastic specimens
The upper limit of the achievable constant strain rates in linearly elastic specimens loaded by a split Hopkinson pressure bar is estimated based on the specimen properties and a linear ramp loading. The crite...
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Article
Analysis of a Crack in a Finite Thermopiezoelectric Plate under Heat Flux
The mechanical and electric fields in a finite thermopiezoelectric plate containing an isolated crack are formulated by applications of the Stroh’s formulism and conformal transformation. The general form of t...
