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 33 for “"mechanical durability"”.
-
Enviro-Mechanical Durability of Graphite/Epoxy Composite Materials
Carbon/epoxy laminates are receiving greater attention by the infrastructure, marine, and offshore oil industries due to the need for superior performance capabilities. Such applications generally involve subjecting materials to harsh temperature and moisture conditions. The objective of this study …
-
Experimental Studies on the Mechanical Durability of Proton Exchange Membranes
… of fuel cell materials that affect the mechanical durability of proton exchange membranes (PEMs). The first two methods involved measuring the in-plane biaxial strength of PEMs and the biaxial hygrothermal stresses that occur in PEMs during hygrothermal cycles. The third method …
-
Analysis and Modeling of the Mechanical Durability of Proton Exchange Membranes Using Pressure-Loaded Blister Tests
… membrane integrity and consequently, fuel cell durability. In this thesis, pressure loaded blister tests are used to study the mechanical durability of Gore-Select® series 57 over a range of times, temperatures, and loading histories. Ramped pressure tests are used with a linear viscoelastic …
-
Simulation of Enviro-mechanical Durability for Life Prediction of E-Glass/Vinyl Ester Composites using a Bridge Service Environment
… infrastructure application, life prediction and durability must be understood. The majority of studies have examined the strength and fatigue response of composites under hot and/or moist conditions. Various researchers have also studied life prediction methods for composite materials under …
-
Effects and applications of capillary condensation in ultrathin nanoparticle assemblies
… of LbL technology, such as the lack of mechanical durability and the difficulty of incorporating a diverse set of functional organic molecules into aqueous solution-based nanoparticle assemblies. The versatility of existing chemical functionalization methods are limited by requirements …
-
Development of Carbon Nanofiber Reinforced HNBR Composite for Sealing Applications
… matrix, for its outstanding performance in mechanical durability and chemical stability. Processing, microstructure, mechanical and thermal properties of HNBR have been studied along with nanofillers, CNFs and other conventional fillers, carbon black and silica. Mechanical measurements and …
-
Realizing flexible batteries from material to manufacturing process
… batteries. These electrodes exhibit excellent mechanical durability and electrochemical properties, demonstrating their practical application potential in flexible energy storage devices. In addition, the thesis designs an innovative uniaxial fiber battery structure specifically for flexible …
-
Investigation of Mechanical and Antibacterial Performance of Novel Polyaniline (PANI) Coatings via PLD
… (PLD) metallic nanolayers to enhance adhesion, mechanical strength, and antibacterial activity. Conductive polymers such as polyaniline (PANI) offer corrosion protection and electrical conductivity, but their practical applications are limited by poor adhesion to metallic substrates. To overcome …
-
Scaling Carbon-Cement Supercapacitors for Energy Storage Use-Cases
… collectors that maintain conductivity and mechanical durability under harsh conditions. Bitumen-based coatings were found to be promising sealants for moisture containment. Shrinkage studies [ are underway, I will complete this part shortly]. Meanwhile, corrosion testing of various …
-
Investigations on Multiscale Fractal-textured Superhydrophobic and Solar Selective Coatings
… has been severely limited by their poor mechanical durability and longevity. Toward addressing this gap, the second and third parts of this thesis work present low cost, facile processes to fabricate superhydrophobic copper and zinc-based coatings via electrodeposition. Additionally, …
-
Application of Preformed Metal Crowns on Class II Carious Lesions on Primary Molars /// Приложение на преформирани метални коронки при втори клас кариозни лезии на временни молари
… One of the main disadvantages is the low mechanical durability. More than 1/3 of the GIC fail in 2 years after their application. The Hall technique is well accepted by children and their parents. It does not traumatize children’s psyche as the method avoids the usage of rotary instruments …
-
Mechanics of proton exchange membranes : time, temperature, and hydration dependence of the stress-strain behavior of persulfonated polytetrafluorethylene
… it is important that the membrane possess good mechanical durability so that it does not form pinholes during operation (something which it has been shown to do experimentally). The goal of this thesis was to develop an understanding of the mechanical properties of Nafion as well as a …
-
Mechanical Integration of a Versatile Air Suspension Into a Powered Wheelchair
<p>Mechanical Integration of a Versatile Air Suspension into a Powered Wheelchair</p> <p>Joel Steinkraus</p> <p>It is undeniable that the vibration environment created by prolonged exposure to wheelchair use can cause discomfort for the rider and put him/her at risk of developing more severe …
-
Advanced Manufacturing of Functional Lightweight Conductive Composite Systems for Sustainable and Flexible Electronics
… easily processed, and exhibit favorable mechanical and thermal characteristics. Typically, polymers are naturally insulative; however, by incorporating nanoscale conductive fillers such as graphene, carbon nanotubes (CNT), and MXene, these nanocomposites achieve the necessary electrical …
-
Fatigue and Fracture Behavior of Graphene-based Nanomaterials
Mechanical durability is an important factor for a reliable design and commercialization of nanostructured products, where the components are susceptible to mechanical failure induced by static and cyclic loads. Known as "wonder material" graphene has demonstrated a great potential to be used in …
-
Laser Powder Bed Fusion Additive Manufacturing of Fe-based Shape Memory Alloys for Biomedical Applications
… combining degradability with desirable mechanical performance and shape memory properties. However, the inherently slow corrosion rate of iron-based alloys poses challenges that limit their practical clinical application. This thesis addresses these issues by employing laser powder bed …
-
Utilising a water-based spraying method to improve 3D printed concrete
… and extended pass times through a suite of mechanical, durability, and microstructural characterisation techniques. Furthermore, the fresh-state deformation behavior was tracked in real-time using Digital Image Correlation (DIC), providing crucial data for the development and validation of a …
-
Development of an Experimentally Validated Non-linear Viscoelastic Viscoplastic Model for a Novel Fuel Cell Membrane Material
… materials and investigations into its long-term mechanical durability are ongoing. Specifically, this document discusses the experimental and analytical work performed in the material characterization, constitutive expression development, and implementation of that expression into uniaxial and …
-
Transparent Omniphobic Coatings that are Flexible and Wear Resistant
Omniphobic or anti-smudge surfaces require good mechanical durability to ensure that they are suitable for practical applications. In general, the abrasion resistance of a surface depends on its hardness. However, when a coating is very hard, it is usually brittle and lacks flexibility. New coating …
-
Altering an Epoxy-Amine Thermoset's Performance Through Varying Mix Ratios
… that require high scratch resistance and mechanical durability, to medical devices, designed to be in continuous contact with biological fluids. Commercial epoxy products come with manufacturer’s information explaining the epoxy properties and recommended preparation processing conditions, …
Page 1 of 2