Quality assurance plays an active role in materials testing. Quality assurance carries out calibration test and manufacturing test. Calibration test is carried out to determine the workability of the measuring properties. Manufacturing test is carried out to determine the adherence to standardization. Some of the tests through which engineering materials are subjected to can be categorized as follows; Mechanical test These tests are carried out on the engineering materials to determine their strength, elastic constants, material properties and performance properties. Mechanical test involves testing the test specimen. The test specimen is obtained through the breaking of the original sample materials. Tensional test These are quasi-static test carried out on the engineering materials to determine the properties of these materials. This test is carried out by exposing the sample material to uniaxial loading conditions. Hardness test The resistances to penetration by most engineering materials are determined by hardness test. Hardness test is carried out using three different methods that are scratch test, rebound test, indentation test. Scratch test involves progressive scratching of a hard material. Rebound test involves the ability to determine the material resilience. Material resilience is determined by measuring the potential energy of the material. Indentation test involves production of a permanent impression on the surface of the materials. The size and the force of the impression determine the material hardness. Hardness test can further be categorized as macro hardness test or micro hardness test. The macro hardness test includes Brinell, Vickers and Rockwell tests. Micro hardness test includes Knoop and Tukon test. Torsion test This is a test that is carried out to obtain the stress-strain relationship for the metal. Torsion test is able to generate both the shear stress and shear strain of the material. Impact test This test is conducted to determine the static properties and the mechanical behavior of the engineering material. Heat treatment and the stress concentrations of the material are carried out under impact test. When the drill (Osaki CD 1202 12V) was stripped down, the following material components were identified; Polystyrene polymer Polystyrene is a vinyl polymer structurally made up of very long hydrocarbon chain. The polystyrene polymer has a phenyl group attached to its carbon atom. This polymer is hard and it is a clear plastic. Polystyrene is made from free radical vinyl polymerization of the monomer styrene. This polymer is hard and it is used for making of the drill handle. Due to its hard nature, it is able to withstand a lot of heat. Nylon This is a thermoplastic polymer which is used as a fiber. Nylons are made from diacid chlorides and the diamines.One of the nylon polymer that is nylon 6, 6 is produced from the combination of two monomers. The two monomers are adipoyl chloride and hexamethylene diamine. Another form of nylon is the nylon 6. Nylon 6 is made from a ring opening polymerization. These nylons are used in making the casing for the ball bearing. It is preferred because of its ability to be fabricated into any shape. Diamond This is the hardest engineering material. They are gem-quality carbon crystals. They are highly refractive crystalline carbon types and are used in abrasives, cutting tools and drilling operations. They have slight impurities in their structures, but they are
Experimental report Name: Tutor: Course: Date: Introduction Materials testing is the actual process of assessing the properties of the material. It is a lengthy process that aims at determining the finer property details of the materials. Engineering materials are tested for their strain so as to determine their failures…
Media helps us in shaping our deepest values as well as how we view the world. The deepest values include; what we consider positive or negative, and good or bad. Media spectacles also, demonstrate people who are allowed to practice force and violence, and those who are not.
Metals, Polymers and Ceramics. Metals are of varying types and the applications of metals in the structural and mechanical work are significantly extensive. However on primary basis metals can be classified in to main groups i.e. are ferrous and nonferrous metals.
For example, a person that buys a cotton shirt made in Bangladesh is probably unaware of the amount of chemical fertilizer necessary to grow the cotton plant, the amount of petroleum needed to harvest the cotton and transport it to the mill.
A group as a unit of analysis may also consist of households, married couples, ethnic groups, and gangs. If for instance one wants to study the eating habits of people, then the household would make the unit of analysis. Organisations also make a unit of analysis.
Rocks and soil texture is frequently changing. Wind and water erode them along and transmit specks of rock away; the minute particles gather in a lake or ocean and solidify into rock again. The oldest rock that has ever been found on the earth surface is more than 3.9 billion years old.
The author of the essay touches upon the phenomenon of artifacts. It is emphasized that artifacts are important because this data can be linked to variations in the “propagation speed of sound in different tissues. Besides, it may be related to bending and vibrations encountered by ultrasound energy as it traverses complex anatomical structures”.
The current focus on sustainable development in concrete technology aims at producing more environmentally friendly cement, which spawns less carbon dioxide and expends less energy. Such environmentally favorable cement is what is referred to as “green
On the other hand we have structure B which is a 800 circular column with a thickness of 50 cm. the total volume for this structure is 400. The analysis period for this structure is similar to that of the above structure. This structure is also
Current engineers, however, apply automated machines in undertaking manufacturing works. Old machines are no longer applicable in the manufacturing process; automated machines outdo the role of old machines. Markillie emphasizes on the introduction of 3D
With the mere addition of glass and carbon fibers to the plastic properties, the material itself is reinforced with mechanical and thermal properties. The reason behind this breakthrough technology is most likely the addition of fibers which allowed for the introduction of anisotropy of properties in this industrial application injection molded parts.
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