Material Properties and Selection in Engineering: A Brief Overview
In this video, we are going to look at in brief elements of bricks, cement, concrete, aerated concrete blocks, steel, metals, timber (wood) and plastics, all in an overview, and how this helps in material selection when one have understood their physical, mechanical and chemical properties. The full lecture will be on the playlist in few days after this video upload and release.
The properties of materials and their everyday uses in the construction industry and other engineering practices is a very important concept to consider before a building project, bridge project, dam project, electircal and electronic design component, and so on, are designed, manufactured or constructed. Material Properties and how to evaluate the mechanical, physical and chemical properties and make a list of them to be able to selelct the right material for construction or manufacturing work. The material properties will change in their working properties if other elements are added to them.
It is important to decide if you are investigating the properties of a material or of an object. For example, are you identifying the properties of a spoon (an object), or are you looking at properties of the material it is made of, for example, stainless steel? Properties like shape and mass may be different for different objects, even when they are made of the same material. Density is a useful property for making comparisons between different materials.
Sometimes it can be useful to distinguish between different types of properties. Physical properties refer to properties that can be observed or measured without changing the composition of the material. Examples include colour, hardness and smell and freezing, melting and boiling points.
Chemical properties are discovered by observing chemical reactions. They include combustion point, reactivity with acids and toxicity.
Processes such as mixing, heating and cooling can change materials and their properties. This can be useful as the new properties may be better suited for particular purposes. For example, mixing certain metals can create a material that is both strong and lightweight.
00:00 Introduction to Material Selection in Engineering Overview
00:20 Bricks (Class A, Class B and Common Bricks)
02:20 Components of Clay Bricks
03:21 Class A, Class B and Common Bricks
05:10 Concrete (Components of Concrete)
05:49 Concrete mix for a 2-storey building
07:20 Aerated concrete blocks
07:40 Aerated concrete blocks resistance to fire
10:20 Cement
11:36 Metal (Ferrous and Non-Ferrous)
15:52 Wood and Timber
16:59 Plastics
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