Composite Materials: Polymer Matrix Composites

Types and Sizes: The fibres are available in bright, semi-dull and dull lustres. The properties of the fibre may be modified over a range which is limited by the inherent characteristics of the polymer, each manufacturer controlling his process to produce fibres that will meet specific requirements. In general, commercial PET polyester fibres fall into two main classes, a. Regalr tenacity b. High tenacity. PET polyester fibres are produced commonly in round crosssection, but fibres of special cross-section are now available from a number of manufacturers.

There is at least 85% polyurethane in spandex. In addition, the spandex elastomer which is characterized by better than rubber due to it’s robust, versatile, lightweight and easily stretched until 500% from its original length. Elastomer is a polymer that has a loose cross-link structure. This type of chain structure causes elastomers have the ability to return to its original shape after being stretched. This fiber has a structure that has soft segments and rigid segments such as figure

However, Boeing had a different view on the VLA market. They found the demand of large airplanes would not materialize for at the very least in 10 years’ time. With that being said, the forecasted deliveries of large cargo aircrafts by Airbus would be close to Boeing in this period from 2000 to 2019, Airbus being at 315 and Boeing at 270. There was a vast difference in the forecasted deliveries of VLA passenger aircrafts with 500 seats or more, Airbus forecasting 1235 while Boeing at 330. Other comparisons of Boeing and Airbus 20-year market forecast include commercial aircrafts in operation, with Airbus at 22620 and Boeing at 31755, Boeing also included regional jets which had less than 70 seats.

The load exerted on the beams will be caused by; the load from the self weight caused by the deck, loads resulted to by the live loads, weight exerted due to car skidding as well as effect of braking and horizontal loads as a result of temperature and movements such as wind. Due to this reason, the beam should be strong enough to carry the load. The design shape of the beam will be as shown below. There are a number of forces that will act on the beams and the bridge thus the beams should be constructed in a way they will be able to

The speed of any wave depends upon the properties of the medium through which the wave is traveling. Typically there are two essential types of properties that affect wave speed - inertial properties and elastic properties. Elastic properties are those properties related to the tendency of a material to maintain its shape and not deform whenever a force or stress is applied to it. A material such as steel will experience a very small deformation of shape (and dimension) when a stress is applied to it. Steel is a rigid material with a high elasticity.

Various materials used for manufacturing a chain link are steel, stainless steel, carbon steel, alloys etc. The chain link which we have considered is used for hoisting purposes, this is because the oval shape is ideal for crane hook as the depth of the crane hook is greater than the width. We will study stresses induced in the link. It is necessary to study the stress distribution, deformation and deflection so as to avoid design failure and loss. The necessary information required for the project like material properties, type of load to be applied, intensity of load is taken from the textbook ‘Strength of Materials ’ by Dr. R. K. Bansal.

These materials have been used for both structural and appearance purposes. That is to say, they work to bear load and give the building a facade. Dry walls and wooden panelling have also been used inside. Steel beams are also easily identifiable supporting the stair cases made of concrete. The building itself is constructed with a wide array of structural elements.

There are different process that can be used to synthesize ABS but all of them involve the polymerization of styrene and acrylonitrile in the presence of an elastomer (butadiene). The product of this polymerization is SAN that later will be graft polymerized to the rubber component and produce ABS. The rubber component is synthesized by free radical polymerization of 1,3 butadiene to produce 1,4 polybutadiene. The cross linking process happens with the abstraction of the reactive allylic sites or by copolymerization through the double bonds. The grafting of SAN to a rubber component is the most essential part of the synthesis of ABS because it combines a styrene-acrylonitrile copolymer with a rubber substrate.

According to Kumar, Dhane, and Priyadarshee (2015) fibers have three-dimensional reinforcement system which similar to root reinforcement where the fibers bind the soil particle together. Since soil usually good in compression but poor in tension, tensile element (fiber) that placed in the soil could help to improve the stability and control deformation of the soil (Kumar et. al., 2015). Strains in the soil mass generate strains and tensile loads in the reinforcement where its act to control the soil movement and thus give the soil additional strength. There are two type of fiber which are natural fiber and manmade fiber.

Does the acquisition make strategic and financial sense? Provide a concise explanation in support of your assessment. (250 words max) Ans 2) Microsoft must have valued LinkedIn over $26 billion. This is more than 8 times the LinkedIn revenue of last 12 months ( $3.2 billion).The ratio is ~5 times Trailing twelve months for public companies on market places shows that price paid/valued by Microsoft is premium. However it is important to note that this is the best time for Microsoft to purchase LinkedIn (as the market cap is 60% of what it was compared to last year and it reached lowest in February 2016).There are half a billion users whose professional data and behavior is up for sale and Microsoft gets it in the right time.