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 6 of 6 for “"helically wound"”.
-
Design optimisation of a slotless brushless permanent magnet DC motor with helically-wound laminations for underwater rim-driven thrusters
… from a single strip of steel that is edge wound into a spiral.<br/>The electromagnetic design of the motor was optimised for maximum efficiency for a given propeller torque and speed. The airgap flux density in was obtained from an analytical solution of Laplace and Poisson's equations of …
-
Design and manufacturing of novel hybrid metal-polymer heat exchangers
… for WHR applications. Prior work has explored helically wound metal-polymer hybrid tubes as a means to combine the best aspects of both these materials for suitable heat exchanger performance. Here we show that compared to joining metal strips to polymer strips using laser welding, ultrasonic …
-
Vortex shedding from a vibrating cable with attached spherical bodies in a linear shear flow
… the behavior in the near wake of a flexible, helically wound, high aspect ratio (L/d = 107) marine cable in a linear shear flow (steepness parameter β = 0.0053) at centerline Reynolds numbers between 2.0 x 10³ ≤ Re<sub>c</sub> ≤ 4.2 x 10⁴. Particular attention was paid to lock-on or …
-
Local plastic deformation in pressure and tensile armour layers of flexible risers
… layer for resisting internal pressure loads, helically wound carbon steel tensile armour layers to resist axial loads and a watertight external sheath. Much of the analytical work that has been carried out on flexible composite pipe is based on the early stress analyses of wire ropes, and this …
-
Finite element modelling and analysis of composite flywheel disk including effects of filament-winding mosaic pattern
A filament-wound spinning composite disk is characterised by the mosaic-patterned configuration of the layers produced during a filament-winding process. In this structure, each helically wound layer consists of curved triangular-shaped units alternating in the radial and circumferential …
-
Thermomechanics of helical strands and helical-fiber-reinforced rods
Helical strands, or helically wound cables, are made of layers of individual wires wrapped around a common central axis. They are seen in ropes and power transmission cables. Similar structures are also present in biological tissues in the form of helical fiber reinforced composites. Regardless of …