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.
Results
Showing 1 to 20 of 20 for “"Durability Testing"”.
-
Durability testing of an aircraft structural health monitoring system
… and sensor optimization, however, the topics of durability, reliability, and longevity of these systems has not been addressed. A framework for developing SHM durability test standards for aerospace vehicles is offered. Existing standards for the durability of commercial and military aircraft …
-
Durability testing of ceramic candle filters in pressurized-fluidized bed combustion environments
… (HTHP) exposure tests to examine their extended durability in simulated coal pressurized-fluidized bed combustion (PFBC) environments. The candle filter materials analyzed included two SiC filters, one with clay binder and one with a minimal amount of clay binder, a cordierite filter, a mullite …
-
Investigating Droplet Impact Dynamics on Engineered Surfaces: Effects of Roughness, Wettability, and Prospects for Anti-Icing Applications
… the study introduced innovative imaging and durability testing protocols. Using 3D profiling, the research tracked microscopic changes in surface structures over time and under stress, such as scratching, peeling, and chemical exposure. These tests identified critical points where surfaces …
-
The Effect of Clay, Cement and Fibers on the Strength and Durability of Compressed Earth Blocks
… cement content and fibers on the strength and durability of compressed earth blocks (CEBs). This work expands on the available information regarding the constituent properties which affect the compressive and tensile strengths and durability of CEBs. Additionally, little research on the subject …
-
Investigation of Testing Methods to Determine Long-Term Durability of Wisconsin Aggregate Resources Including Natural Materials, Industrial By-Products, and Recycled/Reclaimed Materials
… and also that deficiencies in the current WisDOT testing protocol may exist, it has been concluded that the durability-testing program for Wisconsin aggregates needs to be updated. For example, WisDOT is currently using the Sodium Sulfate Soundness Test (ASTM C 88) to measure durability, a test …
-
Developing durable electrodes for selective electroreduction of CO2 to value-added intermediates
… expenses. To start off, Chapter 2 reviews ECO2RR durability studies and highlights any systems with long lifetimes and/or notable approaches to augment stability. Many reported cell configurations possess insufficient lifetimes (<100 h) at low activities (<50 mA cm–2) when considering …
-
Stress Response of Tall and Heavy Electronic Components Subjected to Multi-axial Vibration
… it is still common practice to conduct vibration durability testing on electronic assemblies one axis at a time – in what is termed sequential single degree of freedom (SSDoF) testing. SSDoF testing has been shown to produce lower fatigue damage accumulation rates than simultaneous MDoF testing, …
-
Interface durability of externally bonded GFRP to normal and high-performance concrete
… alkaline and acidic environments. Concerned with durability, this study is based on a fracture mechanics approach to evaluate the interface durability of GFRP bonded to Normal Concrete (NC) and High-Performance Concrete (HPC), subjected to two types of weathering protocols: (1) freeze-thaw cycling …
-
Influence of subgrade improvement and non-uniformity on pavement performance
… the optimum moisture content for strength. Durability testing concluded that CKD stabilized manufactured sand and limestone screenings are not viable construction alternatives, and the addition of class C fly ash with CKD significantly increased the durability of the mixtures. The third …
-
Durabilidade e módulo de elasticidade de misturas areia - cal - cinza volante
Study of durability, elastic modulus, split tensile strength and unconfined axial compression strength of a sandy soil stabilized with lime and fly ash, and also, with the cement addition and replacing part of sand with crushed stone. The selected soil was a coastal dune sand, cohesionless and with …
-
Comparison of the Different Hazards Experienced by Pallets During Material Handling
… correctly for their specific supply chain. Durability is an essential characteristic of pallets; it defines the expected life of the pallet in the supply chain. Forklifts are the dominant mode of material handling for palletized products, and they are responsible for the majority of damages …
-
Error Estimations in the Design of a Terrain Measurement System
… as opposed to prototype construction and durability testing. �Additionally, accurate terrain maps can be used by highway engineers and maintenance personnel to identify deterioration in road surface conditions for immediate correction. �Repeated measurements of terrain surfaces over an …
-
The physical properties, water sensitivity and long term durability performance of vegetal concrete
… properties, water sensitivity and long term durability performance of the concrete. The first part of the work characterised 24 different mixes made up of different binders (hydrated lime, metakaolin and Vicat natural hydraulic lime), bio-aggregate types (hemp and rapeseed straw), a linseed …
-
Impact of carbon support chemistry, morphology, and structure on platinum catalyst durability for PEMFC applications
… applications. These devices, however, lack durability, and this has become one of the limiting factors for commercialization. Many projects have focused on finding ways to improve their lifetimes, but few have tried to examine the underlying causes behind their corrosion. The goal of this …
-
Cement Stabilization of Aggregate Base Materials Blended with Reclaimed Asphalt Pavement
… content and cement content on the strength and durability of recycled aggregate base materials. Specifically, the unconfined compressive strength (UCS) and final dielectric value in the Tube Suction Test (TST) were measured in a full-factorial experimental design including five RAP contents, …
-
Identification and Characterization of Damaging Road Events
In the field of vehicle durability, many individuals are focusing on methods for better replicating the durability a user will experience throughout the typical design lifespan of a vehicle (e.g., 100,000 miles). To estimate user durability a means of understand the types of damaging events and …
-
Surface characterization and adhesive bonding of carbon fiber-reinforced composites
… pretreatment on the adhesive bonding and bond durability of carbon fiber/epoxy and carbon fiber/bismaleimide matrix composites was studied. Methyl ethyl ketone (MEK) wipe, peel ply, grit blast and gas plasma treatments were the pretreatments of interest. Chemical and physical changes which …
-
Implementation of Self-Consolidating Concrete for Bridge Applications
… deemed freeze-thaw durable based on ASTM C 666 testing.;Three precast/prestressed box beams for the Stalnaker Run Bridge were fabricated using a traditional vibrated concrete and two were cast using SCC-2, both of which required a strength of 8,000 psi. Additionally, one extra beam was …
-
CHARACTERIZATION OF CRUSHED PORTLAND CEMENT CONCRETE RUBBLE AGGREGATE FOR URBAN ROADS
… City of Saskatoon stockpiles. Conventional testing completed on the samples included physical properties as required by COS aggregate specifications. Micro-Deval testing was also completed to compare the mechanical breakdown of the aggregates tested. Based on the results of the conventional …
-
Sensitivity analysis on the reliability and durability of the cylinder head to different engine parameters
… on a Sensitivity Analysis on the reliability and durability of the Cylinder Head to different engine parameters. The proposed analysis should be included into the next generation Analysis Development and Validation plan. The new tool would lead engineers to release a design concept robust enough …