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 “"pressure testing"”.
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Hydrostatic Pressure Testing of a Square-Cross Section Stainless Steel Propellant Tank Manufactured Using Selective Laser Sintering
… was accomplished by performing a hydrostatic pressure test (HPT) of a metal SLS manufactured propellant tank, constructed for a nano-satellite of the cubesat class. Strain measurements from twelve strain gage locations on the propellant tank were recorded. A finite element analysis (FEA) …
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An application of Value Stream Mapping to reduce lead time and WIP in a make-to-order manufacturing line
… processes: fit up (oval), full welding, and pressure testing. Assembly cell concept, workload balancing and FIFO lanes were proposed countermeasures or improvements to address the capacity shortfall. A decrease of 27% in manufacturing lead time was projected if these improvements were made. …
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Effect of End-Plate Tabs on Drag Reduction of a 3D Bluff Body with a Blunt Base
<p>This thesis involves the experimental testing of a bluff body with a blunt base to evaluate the effectiveness of end-plate tabs in reducing drag. The bluff body is fitted with interchangeable end plates; one plate is flush with the rest of the exterior and the other plate has small tabs …
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Leakage Characterisation in Bulk Pipes using Pressure Tests
… bulk pipelines in the field were tested with a pressure testing device developed by the University of Cape Town. With this device, a range of pressures were applied to various pipeline sections and the corresponding leakages were measured, resulting in characteristic pressure-leakage …
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Development of a Solution Method to Promote Proper Bandaging Techniques for Transfemoral Amputees
… bandage lengths are expected to apply adequate pressure, while covering the exposed area of the residual limb for the current bandaging step. Testing occurred on an anatomically correct residual limb model (ACM) and five constructed models (CM) assembled by altering proximal and distal ACM …
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Parameterized Shape Adaptive Material: A New Design Method for Inclusive Sportswear
… force-extension curve parameters. Experimental testing is completed to validate the predictive model portion of the optimization tool and shows good agreement in mid-range (aˆ=0.3 & 0.4) designs, with some noted inconsistencies in lower range values (aˆ=0.1 & 0.2). To illustrate how the …
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Design, development and validation of a novel mechanical occlusion device for transcervical sterilization
… Finite Element Method (FEM) and experimental testing. Validation of device was performed following a number of successful bench-top in-air deployments and invitro deployments in animal tissue and explanted human uteri. The efficacy of the device and the instant occlusion of the fallopian tubes …
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Measuring Material Properties of Proton Exchange Membranes using Pressure Loaded Blister Testing and Digital Image Correlation
… for fuel cell membranes subjected to ramped pressure loading to form stress-strain curves that indicate the onset of yielding under biaxial stress conditions. Stress-life curves are developed experimentally for Gore-Selec? series 57 members using data collected under constant pressure …
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Determining ideal staple size for small intestinal surgery in cats
… cat jejunum, were evaluated via intestinal burst pressure testing for maximum intraluminal pressure prior to leaking, and via infusion of an intravascular dye at normal arterial pressures to determine percentage of vascular patency past the staple lines. Vascular patency was compared not only from …
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Ultrasonic wave reflection measurements on self-compacting pastes and concretes
… in the S-wave reflection. Simultaneous formwork pressure testing and UWR were performed; however, no clear correlation was seen between the two properties.
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A Journey Through The Thoracic Aorta: From Root To Arch
… non-aneurysmal samples, and utilised a unique pressure testing apparatus, to determine the maximal stress the root and ascending aorta can withstand prior to rupture. This was a pilot study for Chapter 4. Chapter 4, which focused on a live pig model in ascending aorta and aortic root rupture, …
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Pressure-based leakage characterisation of bulk pipelines
… assessment equipment (PCAE), which uses pressure testing in combination with the latest models on the behaviour of leaks areas with pressure to assess the condition of the bulk pipeline. To verify the efficacy of the PCAE, the device was first tested on three uPVC pipes with known leakage …