Division of Mechanical Sciences: Recent submissions
Now showing items 781-800 of 1880
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A Feasibility Map-Based Framework and Its Implementation for Selection in Engineering Design
(2018-06-26)A pragmatic method for selecting components and devices from a database or parameterized models is developed in this thesis. The quantitative framework presented here is sufficiently general to accommodate an entire device ... -
Heterogeneous Object Modelling : Representation, Construction and Process Planning
(2018-06-26)Heterogeneous Objects are engineered with multiple materials to achieve multiple functionalities like high hardness, high toughness and low structural weight. Heterogeneous objects are increasingly used to achieve multiple ... -
Studies for Design of Layered Ceramic Armour Inspired by Seashells
(2018-06-26)Pearly layers in seashells, also known as nacreous layers, are reported to be three orders of magnitude tougher than their primary constituent, aragonite. Their high toughness is attributed to a particular structure of ... -
Modeling Free Surface Flows and Fluid Structure Interactions using Smoothed Particle Hydrodynamics
(2018-06-26)Recent technological advances are based on effectively using complex multiphysics concepts. Therefore, there is an ever increasing need for accurate numerical al-gorithms of reduced complexity for solving multiphysics ... -
Mesoscale Turbulence on the Ocean Surface from Satellite Altimetry
(2018-06-26)The dynamics captured in the ocean surface current data provided by satellite altimetry has been a subject of debate since the past decade. In particular, the contribution of surface and interior dynamics to altimetry ... -
Experimental Studies on the Effect of an Upstream Periodic Wake on a Turbulent Separation Bubble
(2018-06-26)The object of the present work is to experimentally study the case of a turbulent boundary layer subjected to an Adverse Pressure Gradient (APG) with separation and reattachment. The effect of unsteadiness on turbulent ... -
Analysis of Vehicle Dynamics and Control of Occupant Biodynamics using a Novel Multi-Occupant Vehicle Model
(2018-06-26)Due to the detrimental effects of ride vibrations on occupants and increasing safety concerns, improvement in vehicle dynamic characteristics has become a key focus of researchers. Typically, ride and handling problems ... -
Application of Randomized Algorithms in Path Planning and Control of a Micro Air Vehicle
(2018-06-25)This thesis focuses on the design and development of a fixed wing micro air vehicle (MAV) and on the development of randomized sampling based motion planning and control algorithms for path planning and stabilization of the ... -
Improving High Temperature Strength of 2219 Al Alloy by Minor Alloying Additions
(2018-06-25)Among Al alloys, 2219 Al alloy possesses highest strength at elevated temperatures. However, the application of this alloy is also restricted to a maximum temperature of 150°C, above which, the strengthening precipitates ... -
Advanced Numerical Approaches for Analysis of Vehicle Ride Comfort, Wheel Bearings and Steering Control
(2018-06-23)Suspension systems and wheels play a critical role in vehicle dynamics performance of a car in areas such as ride comfort and handling. Lumped parameter models (LPMs) are commonly used for assessing the performance of ... -
Effect of a Mesh on Boundary Layer Transition Induced by Free-stream Turbulence and an Isolated Roughness Element
(2018-06-23)A high level of free-stream turbulence and surface roughness are known to cause breakdown of an otherwise stable laminar flow. In transition induced by free-stream turbulence, streaks are formed due to the lift-up effect ... -
Response of Geosynthetic Reinforced Granular Bases Under Repeated Loading
(2018-06-21)Key factors that influence the design of paved and unpaved roads are the strength and stiffness of the pavement layers. Among other factors, the strength of pavements depends on the thickness and quality of the aggregates ... -
Experimental and Numerical Studies on Phase Shifting in an Inertance Pulse Tube Cryocooler
(2018-06-21)This work is concerned with the design, development and performance evaluation of an inertance Pulse Tube Cryocooler (PTC). The main components of a PTC are the compressor, regenerator, pulse tube and inertance tube coupled ... -
Experimental Studies on Biodiesel Spray Characteristics : Effects of Evaporation & Nozzle Cavitation
(2018-06-21)Vegetable oil methyl esters obtained by transesterification of vegetable oils are considered to be suitable alternative fuels for diesel engines. However, higher viscosity, surface tension and boiling temperatures of ... -
Piezoelectric Micromachined Ultrasound Transducers : From Design to Applications
(2018-06-21)Ultrasonic sensors are well known for various applications such as NDT, ultrasound imaging, and proximity sensing. Conventional ultrasound transducers are bulky, work at notoriously high voltages, and consume significant ... -
Hot Deformation Behaviour of Some Refractory Metals and Alloys
(2018-06-21)Out of the known refractory metals and alloys, molybdenum (Mo) and its alloys are very important due to their unique combination of properties which render them suitable for various applications. Owing to their good creep ... -
Effect of Semi-Solid Processing on Microstructural Evolution and Mechanical Behavior of Austenitic Stainless Steel
(2018-06-19)In view of the significant advantages offered by semi-solid processing, such as reduction in number of intermediate processing steps and energy input, and the potential for improving component complexity, it is of paramount ... -
A New Mathematical Framework for Regional Frequency Analysis of Floods
(2018-06-19)Reliable estimates of design flood quantiles are often necessary at sparsely gauged/ungauged target locations in river basins for various applications in water resources engineering. Development of effective methods for ... -
Modeling of Contact in Orthotropic Materials using Variational Asymptotic Method
(2018-06-18)Composites are materials which cater to the present and future needs of many demanding industries, such as aerospace, as they are weight-sensitive for a given requirement of strength and stiff ness, corrosion resistant, ... -
Analysis of Thick Laminated Composite Beams using Variational Asymptotic Method
(2018-06-18)An asymptotically-exact methodology is presented for obtaining the cross-sectional stiffness matrix of a pre-twisted, moderately-thick beam having rectangular cross sections and made of transversely isotropic material. The ...