Materials science

Though sloping roofs are commonly used all over America, flat roofs are steadily gaining a lot of popularity. This is mainly because they have a host of benefits to offer as far as homeowners are concerned. Now, there might be some of you who do not have a clear idea as to what flat roofing actually is. Well, they are not entirely flat but have a slight amount of slope that is usually of about 10 degrees to facilitate draining of water and snow. The concept of flat roofs was introduced centuries…

The past chapter proposed the continuous floating constraint and buckling column concept. In this chapter, a test setup is proposed to investigate its loading nature and validate the concept. A series of tests are performed, and the results are presented and discussed. The results of the tests conducted in this chapter will serve as measures in assessing the strengths and flaws of the initial concept, and point towards potential solutions. This group of tests varied two geometric parameters:…

They have many advantages when considered for industrial and machinery and lubrication purpose. Vegetable oil can have excellent lubricity and lubrication properties over synthetic oil. In many applications like for tractor transmission, friction material need to be added to reduce clutch slippage [8]. Lubricants need to possess some lubrication properties which give good machining performance. Vegetable oil have very high viscosity index (VI). For example 223 for soya bean oil versus 90-100 for…

individuals. Oscar Vazquez wanted a career in the military but ran into some problems when he went to a meeting to become a soldier. The team also ran into the problem of not having enough money for the robot and had to keep a tight budget for materials. In paragraph 15 it explains that Oscar Vazquez’s parents brought him to the U.S. from Mexico without proper paper work, not allowing him to receive a scholarship, nor get into the military. This is an obstacle because he was kept from…

Trusses have a high strength to weight ratio and consequently are used in many structures, from bridges, to roof supports, to space stations.The Pros of a Truss Bridge 1. They might be light, but they are also strong. Truss bridges utilize the materials that are needed to create them very effectively. This makes them very economical to build, but doesn’t compromise on the ground of the bridge. Because it uses small timbers, the…

The assigned material for this week's article summary assignment is titled "Metal polishing: Do this, not that". The article is authored by CTD Mike, and was published on 06 Oct 11. The article appears on the cheaperthandirt.com website, and may be sourced at: http://blog.cheaperthandirt.com/metal-polishing-this/. The article begins with the assumption you have a task to perform that involves removing metal. Should I use the Dremel rotary tool? Stones? If you want to make sure you don't jack up…

due to various reasons: Uncertainties in loading or environment Defects in material Inadequacy in design Deficiency in construction or maintenance The strength of materials can be increased significantly. But sometimes this comes at the cost of reduced ductility of the material. For example, strength of steel can be increased by manipulating the microstructure. But this increases the brittleness of the material. Thus, a member can fail catastrophically due to crack formation and…

CHAPTER- 5 ANALYSIS OF STEEL LEAF SPRING ________________________________________________________________ The aim of this analysis is to study the multi-leaf steel leaf spring under loading conditions and verify those results within the allowable limits. ANSYS software is used to analyze the stresses and strains by performing static analysis for the given leaf spring specifications and modal analysis is performed to determine the natural frequencies and mode shapes to asses the behavior of the…

AC 2.3: Explain the method of making titanium alloy and investigate how the composition and structure of metal alloys, polymers and poly-matrix composites influence the properties of the parent material. 1. Extraction process. 2. Melting process. 3. Storage process. Extraction of Titanium by Kroll process: First titanium ore Rutile (TiO2) is taken. Rutile is converted into titanium sponge by the following process: Titanium tetrachloride (TiCl4) – a colourless compound is obtained as a result…

3 SHORE DUROMETER HARDNESS STRENGTH Hardness was defined as materials resisting property to prevent permanent indentation. Durometer is a measure of hardness in polymers, fibre and rubbers where it measures the indentation depth in the material. According to ASTM D2240 tests were conducted on specimen using Durometer in the room temperature [5]. The test is done on the surface by supplying load and measuring the indentation. The material under test must be a minimum of 6.4 mm thickness. It was…