197 Result(s)
within
English
Engineering
Characterization and Evaluation of Materials
Solid Mechanics
Vibration, Dynamical Systems, Control
**hu Li
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Article
Analysis of holographic fringe formation and holospeckle interferometry
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Article
Determination of the complex shear modulus of structural adhesives using a doubly clamped sandwich beam
A method is described for calculating the complex shear modulus of structural adhesives from dynamic test data on a doubly clamped sandwich beam in which the adhesive is contained as a thin layer. The accuracy...
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Article
A Kolsky bar: Tension, tension-tension
The present paper introduces a new technique which combines rotation disk and traditional Kolsky bar (often termed as split-Hopkinson bar). This technique can be employed to study the tension stress-strain rel...
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Article
New test method for obtaining softening response of unnotched concrete specimen under uniaxial tension
A new method was developed to obtain the complete stress-deformation response of an unnotched concrete specimen. This method employs a digitally controlled closed-loop testing machine and five control channels...
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Article
Fiducial grid for measuring microdeformation ahead of fatigue crack tip near aluminum bicrystal interface
Fiducial grids have been applied to measure micro-deformation near interfaces in aluminum bicrystals and to study mechanisms of fatigue crack transfer across the interface under loading in a scanning electric ...
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Article
The interferometric strain rosette technique
An interferometric strain rosette can be used to measure three in-plane strains. The strain rosette consists of three microindentations produced on an object surface. Upon illuminating the indentations with la...
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Article
Three-dimensional stress relief displacement resulting from drilling a blind hole in acrylic
Analyses of optically based, hole-drilling stress measurements require accurate knowledge of the three-dimensional relaxation displacements induced by the drilling of a blind hole into the surface of a stresse...
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Article
Interferometric strain/slope rosette for static and dynamic measurements
The interferometric strain/slope rosette (ISSR) is extended from the interferometric strain gage (ISG) and the interferometric strain rosette (ISR) for measuring three derivatives of out-of-plane displacements...
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Article
A novel technique for the fabrication of laboratory scale model functionally graded materials
In this work, the authors describe the design, fabrication and testing of model functionally graded materials (FGMs). The inhomogeneous property variations were generated by altering material properties throug...
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Article
Application of Infrared Thermography Technique in Building Finish Evaluation
Infrared thermography is a well-established technique for evaluating material properties through thermal measurement. In this paper, the thermographic principle of debonded building-finish system is proposed b...
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Article
A transversely suspended accelerometer
This paper describes a transversely suspended accelerometer (TSA) designed to measure acceleration at low frequency with high sensitivity in the vicinity of a strong magnetic field. The TSA is a simple diffrac...
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Article
Initiation and growth of wrinkling due to nonuniform tension in sheet metal forming
An experimental investigation was conducted on the initiation and growth of wrinkling due to nonuniform tension using the Yoshida buckling test. The initiation of wrinkling was detected by strain gages mounted...
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Article
Damage process detection of a ceramic tile system by acoustic emission
The debonding and falloff of ceramic tile systems are common failure modes for ceramic finishes of buildings and infrastructures due to the damage accumulation caused by application of mechanical load or chang...
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Article
Accurate integration of surface profile data with quantitative error analysis
In the process of surface profiling in experimental mechanics, multiple sets of measured, three-dimensional surface data oftentimes are obtained without precise knowledge of their relative position or orientat...
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Article
An Efficiency Study of Transient Wave Generation in a Thermoelastic Layer with a Pulsed Laser
The efficiency of transient wave generation in a thermoelastic silicon layer excited by a pulsed laser is considered. First a principle-based transfer matrix formulation with relaxation effect, also referred t...
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Article
Circumferential strain measurement for a concrete cylinder in uniaxial compression by a fiber optic sensor
This paper deals with circumferential strain measurement for concrete in uniaxial compression by using a fiber optic sensing system. A fiber optic sensing system was employed to measure the elongation of the o...
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Article
Characterization of Bonding Quality in a Multilayer Structure Using Segment Adaptive Filtering
Ultrasonic testing is widely used in detection of disbonds in multilayer structures such as solid fuel rocket motors, which consist of steel, rubber laminate, and solid fuel. However, only a small fraction of ...
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Article
Experimental study of the temperature field generated during orthogonal machining of an aluminum alloy
During the machining of metals, plastic deformation and friction lead to the generation of heat in the workpiece, which results in thermomechanically coupled deformation. Recently, several numerical models of ...
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Article
Quantitative Detection of the Defects in Thin-Walled Pressure Vessels with Holography and Shearing Speckle Interferometry
Quantitative assessment of the coordinates, size, embedding depth, and type of defects of a thin-walled pressure vessel is becoming increasingly important for both economic and safety reasons. Nondestructive t...
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Article
Dynamic fiber debonding and frictional push-out in mode composite systems: Experimental observations
In the present work a modified Split Hopkinson Pressure Bar (SHPB) system is adopted to perform dynamic fiber push-out experiments on model single fiber composite systems. A tapered punch and a support connect...
