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Showing 1 to 17 of 17 for “"Damage Evaluation"”.
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Damage evaluation in dimension limestone using nonlinear ultrasonics
… limestone test samples with increasing levels of damage were obtained by exposing limestone samples to temperature levels of 100 oC, 200 oC, 300 oC, 500 oC, 600 oC, and 700 oC for a period of 90 minutes. The samples were then nondestructively tested using nonlinear ultrasonics in the form of a …
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A monitoring method for after-earthquake damage evaluation of buildings
After-earthquake assessment of buildings in terms of usability and safety is nowadays performed by in-charge technicians which are called to give their judgment basing mainly on in-field surveys and visual inspections. This necessarily implies additional inconvenience for residents and economic …
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Impact damage evaluation of high performance polymeric composite material systems
… Institute and State University is described. Evaluation methods for impact damage resistance and impact damage tolerance as developed by K. T. Teh are presented as a basis for comparative analysis of new materials. Experimental results are presented for six different laminated fiber reinforced …
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Damage evaluation in dolomitic limestone using nonlinear ultrasonic higher harmonic generation
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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Behavior of Prestressed Pile to Bent Cap Connections and Damage Evaluation with Acoustic Emission
… the connection behavior as well as to provide damage assessment tools a series of studies was conducted.</p> <p>The first study investigated the behavior of the plain pile embedment detail at exterior connections using cast in place (CIP) bent caps. During seismic events, exterior connections …
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Damage development under compression-compression fatigue loading in a stitched uniwoven graphite/epoxy composite material
Damage initiation and growth under compression-compression fatigue loading were investigated for a stitched uniweave material system with an underlying AS4/3501-6 quasi-isotropic layup. Performance of unnotched specimens having stitch rows at either 0° or 90° to the loading direction was compared. …
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Mechanical behavior and damage mechanisms of woven graphite-polyimide composite materials
… tested. Material properties were measured and damage development documented under monotonic tension, sustained incremental tension, and tension-tension fatigue loading. Damage evaluation techniques included stiffness monitoring, penetrant-enhanced X-ray radiography, laminate deply, and residual …
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Effect of ground motion frequency on non-structural seismic damage
… of structures are significant to structural damage evaluation, and most seismic design methods consider the effect of peak ground acceleration, while the frequency content of seismic activities remains largely unexplored. In order to better understand the impact of low magnitude seismic …
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Field Performance of Epoxy-Coated Reinforcing Steel in Virginia Bridge Decks
… drilled from each bridge deck. The concrete core evaluation included visual examination and determination of carbonation depth, moisture content, absorption, percent saturation and chloride content at 13 mm depth. Rapid chloride permeability test was also performed for the surface and base …
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Qualitative health monitoring and incipient damage inspection/evaluation
… which can be implemented for real-time damage evaluation of complex structures, is investigated. The basic principle of the technique is to monitor the structure's mechanical impedance which will be changed with the presence of damage. The mechanical impedance variations are monitored by …
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Evaluation of the IDEAL-CT for Hveem-Designed Asphalt Mixtures in Nevada
… to determine the tensile strength for moisture damage evaluation in accordance with AASHTO T 283 (tensile strength ratio, TSR). In addition, the Moisture Induced Stress Tester (MiST) was examined as a potential alternative for the freeze-thaw cycle of moisture-conditioned specimens. As an …
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The Connection Behavior of Precast Prestressed Piles to Cast-In-Place Bent Caps
… the connection behavior as well as to provide damage assessment tools a series of studies was conducted. </p> <p> The first study investigated the behavior of the plain pile embedment detail at exterior connections using cast in place (CIP) bent caps. During seismic events, exterior connections …
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Damage characterization and modeling of notched graphite/epoxy sandwich panels in compression
Damage tolerant design, which focuses on a structure's ability to perform in a damaged state, is widely used in the aerospace industry today. Although extensive research has been carried out in this area for notched composite laminates, a relatively small fraction has dealt with compressive loading …
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Phased Array Damage Detection and Damage Classification in Guided Wave Structural Health Monitoring
Although nondestructive evaluation techniques have been implemented in many industry fields and proved to be useful, they are generally expensive, time consuming, and the results may not always be reliable. To overcome these drawbacks, structural health monitoring (SHM) systems has received …
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Risk-based bridge asset management
… and Exposure. Within the structural reliability evaluation, two key components are integrated into the proposed procedure: a Markov Chain-based degradation model that forecasts the progression of existing damage, and a Bayesian model that predicts the appearance of new structural defects over …
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MAPK and pro-inflammatory mediators in the walls of brain blood vessels following cerebral ischemia
… the ischemia and contributes to the irreversible damage [18-21]. Currently, there are two major ways used for treating ischemic stroke: (i) Dissolution of the clot in the occluded artery by a thrombolytic drug, rt-PA (recombinant tissue-plasminogen activator) [22] and, (ii) administration of …