Nickel-coated carbon fibre (NiCCF) is an important composite material, which finds numerous engineering applications, primarily within: computer, telecommunication, automotive and military industries. In general, NiCCF can be produced by one of the three methods, namely: chemical vapour deposition (CVD), electroless, and electrochemical (galvanic) deposition of Ni on a carbon fibre tow material...

A finite element method is presented for predicting the mechanical performance of discontinuous fiber mesostructures typically produced by directed carbon fiber preforming. High-filament count bundles are modeled using beam elements to enable large representative volume elements to be studied. The beams are attached to a regular grid of 2D continuum elements, which represent the matrix material...

The tension–tension fatigue behavior of (the layer-to-layer) three-dimensional angle-interlock woven composite (3DAWC) was investigated using the acoustic emission (AE) technique, examination of damaged regions via light microscopy and micro-CT, and finite element analysis (FEA). AE events occurred during the entire fatigue process, and damage modes were determined based on cumulative fatigue d...

Carbon fiber reinforced polymer (CFRP) sheets can be externally bonded for retrofit of concrete structures, improving flexure and sheer strength in the concrete. The key to CFRP sheets is the bond to the concrete, as bond is the means to transfer stress between the tow sheet and the concrete. Experimentation has been conducted to test a current market fiber-resin system, and to develop a resin ...

Humid tropical climate favours the existence of a corrosive atmosphere that causes deterioration of metals. This article describes an automated system for monitoring environmental values (temperature and relative humidity) in order to know the time of wetness (TOW), which is key factor in determining the atmospheric aggressiveness which are exposed the metals used, for example, in industrial fa...

A comparative analysis of the results primary processing whole oil flax stalks in KP-100L tow preparation unit with use additional equipment and different arrangement on feeding conveyor is presented.

Increasing the production of high-performance natural fibres that minimise their impact on environment is a challenge flax (Linum usitatissinum L.) cannot address alone. In traditional territories, hemp (Cannabis sativa can be complementary source high added value if yield long line maximised to levels equivalent one flax. The objective present work was establish process parameters maximising f...

the wisconsin test card sorting test (wcst) is a neuropsychological test that has been suggested as a more specific test for frontal lobes dysfunctions. this study was designed to determine whether wcst is able to differentiate between iranian psychiatric patients with cognitive disorders and normal subjects, and whether wcst scores are related to severity of symptoms in depressive and schizoph...

Title of dissertation: SIMULATION MODELING OF FLIGHT DYNAMICS, CONTROL AND TRAJECTORY OPTIMIZATION OF ROTORCRAFT TOWING SUBMERGED LOADS Ananth Sridharan, Doctor of Philosophy, 2014 Dissertation directed by: Professor Roberto Celi Department of Aerospace Engineering This work presents the mathematical modeling and analysis of helicopters towing submerged loads using long cables for sub-surface o...