IJOART Volume 5, Issue 4, April 2016 Edition


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CLIMATE CHANGE MITIGATION AND RESTORATION OF FOREST AND DEGRADED LANDS;ITS IMPACTS ON ECONOMIC MELTDOWN IN NIGERIA[]


Climate change is a major concern of the whole world. It is mostly caused by human activities since the industrial revolution through the use of fossil fuels, cement production, deforestation and unsustainable agricultural practices which has doubled the amount of green house gases (GHG) in the atmosphere. The menace thus resulted in climate-weather variations on all temporal and spatial scales, ranging from short-lived severe storms to decadal droughts arid century shifts in temperature and ice cover. The expansion of agriculture over the past three decades involved the cultivation of marginal areas and clearance of important natural habitats such as forests and wetlands. The conversion has now become major driving force behind land degradation. Loss of natural habitats has reduced vegetation cover and exposed soils to wind and water erosion which leads to a significant reduction of the productive capacity of land.


EFFECT OF THERMAL STRESS AND AXIAL LOAD ON COUPOLA FURNACE METAL COMPONENTS[]


When an unrestrained metallic material is heated or cooled, it dilates in accordance with its characteristic coefficient of thermal expansion. But components that are restrained behave differently to thermal effects as a result of the restraining loads this could lead to permanent deformation of the surface due to rupture, wrinkles, crack, rumple etc. This study presents analysis of axial loading and thermal stresses in an internally heated Copula furnace component that is subjected to turbulent flow, and pulsating flow. The effect of flow Reynolds number on thermal stresses in the insulated component close to the chimney or exhaust channel ,the influence of hot fluid and axial load on components on the resulting thermal stresses in steel material owning to temperature gradient and with different diameters, and thickness to diameter ratios are covered in this study to examine the effects on thermal stresses and axial load. The amount of heat flux at the inner wall of the Component with regard to regular use and unfriendly heat dissipation creating severe temperature gradient on the inner and outer walls is also included in the study.


DESIGN AND ASSESMENT OF A FIBRE GLASS LEAF-SPRING REINFORCEMENT ON CARBON FIBER POLY-ETHER-IMIDE (PEI) BUMPER’S IMPACT PERFORMANCE[]


The automotive industry has been very competitive as far as its design and material usage are concerned. The automotive industries face greater market pressure on how to develop high quality products at lower cost, reduced weight in order to improve fuel efficiency and cost, this aesthetics consideration had led the automotive engineers not to focus on car’s delicate component and engine besides the users. Good bumper design like Car body shell stiffness can help to protect the occupants of a car. Thus , this work aims to design and analyzed impact performance on absorption of impact energy during a low and high speed collision, stress distribution ,stiffness and rate of deflection a carbon fibre PEI- Poly-Ether-Imide fibre glass leaf spring reinforced bumper to protect delicate car component ,occupants and pedestrian. The bumper performance is enhanced by the leaf spring fibre glass reinforcement in PEI bumper which lowered the deflection or deformation on impact.



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