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 111 for “"brittleness"”.
-
Caprock integrity evaluation for geosequestration of CO2 in depleted petroleum reservoirs.
… during CO2 geosequestration can impact the brittleness of the formations due to changes in their mineralogical compositions during the geochemical reactions. Therefore, studies on the co-injection of CO2 with other acid gases from industrial emissions and their impact on caprock integrity …
-
Computer simulation study of grain boundary structure in B2 NiAl
… an effort to understand intrinsic grain boundary brittleness, computer simulation of grain boundary structures in ordered NiAl was carried out. The considered boundaries were boundaries of low reciprocal coincident site density Σ. The structural unit model was used to obtain a general picture of …
-
Energy absorption in Ni-Mn-Ga/ polymer composites
… a polymeric matrix could solve the issue of the brittleness while retaining a large fraction of the strain output of the alloy. At first glance a similar approach could be used to solve the brittleness issue of Ni-Mn-Ga, but the low blocking force of these alloys reduces the chances of achieving …
-
Lithofacies Determination in the Willesden Green and South Pembina Duvernay Formation: Creation, Characterization, and Correlation
… data, elastic properties, elastic property-based brittleness indices, mineralogical brittleness indices, and basic source rock data. A sedimentological assessment of seven wells was performed and the resultant data used to define the proposed lithofacies. The lithofacies relate to natural …
-
Variations in mineral abundance within a single horizontal well path in the Woodford Shale, Arkoma Basin, Oklahoma
… data were used to calculate a mineral-based brittleness index (Wang and Gale, 2009), which was compared to the measured frack gradient across perforations of the Carleigh 6H-32 well. In addition, the total organic matter content (TOC) was approximated in the same samples using loss on …
-
A study of the transformation behaviour and mechanical properties of iron-manganese alloys.
… of explanation, and the most likely cause of brittleness was shown to be the possible segregation of impurities at prior austenite grain boundaries which created all of the effects usually encountered with temper brittleness.
-
Bone Tissue Quality Determination of Mice Through a Novel Reference Point Indentation Technique
… parallel previously reported phenotypes for bone brittleness. Crack formation occurred under the indenter tip, suggesting that the tip acts as an “opening-wedge”. These cracks initiated in the transverse direction and were then diverted into the longitudinal direction. Other toughening mechanisms …
-
ΔΟΜΙΚΟΙ ΜΕΤΑΣΧΗΜΑΤΙΣΜΟΙ ΚΑΤΑ ΤΗΝ ΑΝΟΠΤΗΣΗ ΑΝΟΞΕΙΔΩΤΩΝ ΦΕΡΡΙΤΙΚΩΝ ΧΑΛΥΒΩΝ ΚΑΙ Η ΕΠΙΔΡΑΣΗ ΤΟΥΣ ΣΤΗ ΣΥΜΠΕΡΙΦΟΡΑ ΚΑΤΑ ΤΗ ΘΡΑΥΣΗ ΚΑΙ ΚΑΤΑ ΤΗΝ ΟΞΕΙΔΩΣΗ ΥΨΗΛΗΣ ΘΕΡΜΟΚΡΑΣΙΑΣ
… ZR AND TI ADDITIONS FAVOURED THE INCREASE OF THE BRITTLENESS OF THE ALLOYS, WHILE NI ADDITION HAD THE OPPOSITE EFFECT. THE ZR AND NIADDITION IMPROVED THE HIGH TEMPERATURE OXIDATION RESISTANCE OF THE ALLOYS.
-
Development of a Novel Thermal Shock test for isostatically Pressed Carbon-Bonded Refractories
… pressed carbon-oxide materials that differ in brittleness at failure. An infrared temperature measurement, contact extensometers, as well as non-contact techniques, such as digital image correlation (DIC) and laser Doppler vibrometry (LDV), were employed. Because of the novelty of Laser Doppler …
-
On the Role of the Source Dataset in Transfer Learning
… such as pinpointing transfer learning brittleness as well as detecting pathologies such as data-leakage and the presence of misleading examples in the source dataset. In particular, we demonstrate that removing detrimental datapoints identified by our framework improves transfer …
-
The influence of high performance matrices on fracture behavior of concrete
… behavior (e.g. the fracture energy, G_F, and the brittleness). In this study, coal fly ashes were fractionated into various size ranges by the air classifier method. It is found that replacing cement by very fine fly ash (with average particle size less than 3 microns) can enhance both the …
-
Encapsulation of particles using brittle coatings for subterranean applications
… silica in the coat increased significantly its brittleness. The acrylate formed agglomerates during the coating process. These were easier to break than single particles. These agglomerates also gave a low leach rate and large release upon compression.;Agglomerates coated with acrylate and …
-
Advancing structural applications of nickel electrodeposition onto additively manufactured polymers
… strength up to 800 MPa, although with increased brittleness address by post processing heat treatment. This work also explores novel methods of electrodeposition of nitinol binary alloy with promising composition results revealing near equal deposition by weight.
-
Aspects of Adhesion of Metallised Plastics.
… including an interaction factor. The problem of brittleness encountered with copper plated ABS composites has been overcome by careful design in the use of selective area plating, whilst retaining certain other desirable composite properties...
-
The fracture toughness of silica fume concrete using experimental and numerical techniques
… was subsequently used to assess the degree of brittleness of the concrete. It was found that beyond a compressive strength of about 90 N/mm2, increased brittleness was obtained with increasing strength.<br/><br/>Some of the fracture tests were conducted on concrete reinforced with polypropylene …
-
Structure and Properties Of dimethacrylate-Styrene Resins and Networks
… was increased along all series' of materials, brittleness increased even though the molecular weight between crosslinks increased. This was attributed to the inherent relative brittleness of the polystyrene chemical structure relative to the polyhydroxyether component. This may also be related …
-
Study of Mechanical Properties of PVA Fiber-Reinforced Concrete With Raman Spectroscopic Analysis
<p>The brittleness of concrete has always been a safety and economic issue of great concern. The low tensile strength of concrete is the cause of its intrinsic brittle nature. This is critical considering the amount of concrete used for the construction of highways, buildings, and other facilities. …
-
A probabilistic reasoning-based approach to machine learning
… systems have significant limitations like brittleness, i.e. the deterioration of performance on a different domain or problem and lack of power required for handling real-world learning problems. The goal of my research was to develop an approach in which many of these limitations are …
Page 1 of 6