Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Damage characterization"”.
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Wave Propagation and Damage Characterization in Natural Fiber Hemp and LLDPE Composite
Research in incorporating natural fibers in composites has been in progress for a few decades where the various mechanical, electrical and acoustic properties of such composites were explored. Natural fiber composites (NFCs) have few benefits over the traditional glass or carbon fiber composites …
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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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Nondestructive damage characterization of concrete and concrete-steel composites using contactless ultrasonic scanning
… lead to the initiation of surface and internal damage that grows during the remaining service life of structure unless appropriately repaired. To repair and retrofit damaged structures effectively, damage needs to be detected and characterized early on in the process. Although existing …
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A Machine Learning and Computer Vision Framework for Damage Characterization and Structural Behavior Prediction
… to relate surface (and limited subsurface) damage observations to quantitative damage and load levels in structural components. In particular, image processing and machine learning regression techniques have been used to build predictive models capable of estimating internal loads (e.g., …
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Non-destructive quantitative assessment of oxidation in aged and rejuvenated asphalt concrete pavements using a non-collinear wave mixing approach
… micro-flaw population in the mastic. This damage is primarily concentrated at the top (surface) of the pavement, where exposure to oxygen is the greatest. These flaws serve as the nuclei to crack formation and propagation, and adversely affect the pavement's structural integrity. It is more …
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Transport imaging in the one dimensional limit
… work on sample preparation, modeling and initial characterization. One dimensional structures are being integrated into forefront electronics due to their inherent advantages in size, packing density and power consumption. In this work the one dimensional equation for steady state minority carrier …
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The multifactorial nature of hypoxia-induced drug resistance in cancer: involvement of hypoxia-inducible factor 1
… with decreased drug-induced senescence. DNA damage measured at the single-cell level revealed that the increase in survival correlated well with a HIF-1-dependent decrease in etoposide-induced DNA strand breaks, providing direct evidence that exposure of tumor cells to hypoxia leads to …
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Modeling and Experimental Analysis of Piezoelectric Augmented Systems for Structural Health and Stress Monitoring Applications
Detection, characterization and prognosis of damage in civil, aerospace and mechanical structures, known as structural health monitoring (SHM), have been a growing area of research over the last few decades. As several in-service civil, mechanical and aerospace structures are approaching or even …
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Impedance-based Nondestructive Evaluation for Additive Manufacturing
… a structure to itself over time, potentially-damaged structures are compared to known-healthy reference structures. The purpose of INDEAM is to provide an alternative to conventional nondestructive evaluation (NDE) techniques for additively manufactured (AM) parts. In essence, the geometrical …
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Influence of process parameters and manufacturing defects on the properties of thermoplastic composite pipes.
… will be beneficial. Also, the current in-situ characterization online methods used in monitoring the process provided an outlook on the potential of process monitoring for process optimization and quality control through detecting and classifying these manufacturing defects. This research aims …