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 12 of 12 for “"Debonds"”.
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Closed/Semi-Closed Form Solutions for Face/Core Debonds in Sandwich Beams
… at the interface between face and core. These debonds can grow and eventually lead to complete failure of the structure. To understand and study such debonds analytically, an Elastic Foundation Analysis (EFA) can be used to incorporate the effects of crack tip deformation in beam theory. In …
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Application of digital infrared thermography for nondestructive evaluation of composite bridge components
… system to detect subsurface defects such as debonds and delaminations in Fiber Reinforced Polymer (FRP) bridge decks and other composite bridge components such as beams and columns wrapped with steel or FRP jacket.;This thesis investigates the use of digital infrared thermography on FRP …
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Development of a portable low-cost digital shearography system
… light, to detect flaws such as cracks, debonds and delaminations in materials.
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Assessment of Infrared Thermography for NDE of FRP Bridge Decks
… Thermography (IRT) as a means of detecting debonds and voids caused by conditions encountered both in fabrication and in the field. As forced convective hot air is applied within the bridge deck, debonds between bridge deck components near the riding surface appear cold while imperfections …
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Crack path selection and shear toughening effects due to mixed mode loading and varied surface properties in beam-like adhesively bonded joints
… cracks can start within the adhesive layer or debonds can initiate near an interface. The paths taken by propagating cracks can affect the resistance to failure and the subsequent service lives of the bonded structures. The behavior of propagating cracks in adhesive joints remains of interest, …
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Detection of subsurface anomalies in fiber-reinforced polymer (FRP) wrapped timber bridge components using infrared thermography
… fabric. The field test data was used to detect debonds at the composite-timber interface and study the effect of environmental parameters on infrared images.;This study shows that the infrared thermography technique can be used to effectively to detect subsurface delaminations in timber …
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Aspects of holography
… testing technique for the detection of debonds, delaminations, cracks, etcetera. In the second part of the study, the zero-order and fringe-counting techniques were applied to a cantilever loading experiment as a means of quantitatively determining the cantilever's displacement. It was …
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Elastic Analysis of the Loop Tack Test for Pressure Sensitive Adhesives
… Then the loop is pulled up, and gradually debonds from the substrate. The loop is assumed to be nonlinearly elastic and inextensible. The mechanics of the loop tack test are studied in order to determine the impact of various factors on adhesive performance. These factors include the …
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The notched coating adhesion specimen: a fracture test for coatings and accelerated screening test for adhesion
… The coating is notched to induce initial debonds, and the specimen is then loaded in a manner to produce tensile stresses in the coating. The substrate strain at which the coating debond propagates is then used to determine the critical strain energy release rate. Yielding of the substrate …
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An investigation into the effect of waterblast on concrete and asphalt surfaces
… they generate excess heat and pressure that debonds the rubber from the tire. As more aircraft land on the runway, more rubber accumulates and decrease the runway’s coefficient of friction. Once this occurs, water blasting is most commonly used at O’Hare International Airport to remove the …
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Design and Development of an Anti-fouling Urinary Catheter Utilizing Active Surface Deformation
… (1) strain in the elastomeric substrate actively debonds crystalline biofilms in vitro (2) modeling based on characterization of biofilm properties and understanding of substrate strain informs and facilitates prototype catheter design (3) urinary catheter prototypes utilizing inflation-induced …
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Dynamic Mixed-Mode Fracture of Bonded Composite Joints for Automotive Crashworthiness
… adherends. Furthermore, the propensity of debonds to propagate into the woven composite laminate adherends under mode II loading conditions limited the number of crack initiation points that could be obtained to one or two usable data points per specimen. A limited number of experimental …