Civil Engineering Hub

Properties of Engineering Materials Download - Click Here What do engineers do?  Engineers apply the principles of science and mathematics to develop economical solutions to technical problems.  They are concerned with the structure and properties of materials used in modern technology to improve the design and fabrication What are materials? The term “material” is defined in different ways. Materials are the substances of which something is  made or composed of. Can simply group them as;  Solid  Liquid  Gas Historical Development Materials have been fundamental to the development of civilization. materials used by the different civilizations such as  Stone Copper  Bronze Iron age Material age

Engineering Graphics and AutoCAD lecture notes   Download - Click Here LOCUS It is a path traced out by a point moving  in a plane, in a particular manner, for one  cycle of operation. The Cycloid The cycloid is the locus of a point on the circumference of a circle as the circle rolls, without  slipping, along a straight line. The Involute There are several definitions for the involute, none being particularly easy to follow. An involute is the locus of a point, initially on a base circle, which moves so that its straight- line distance, along a tangent to the circle, to the tangential point of contact, is equal to the  distance along the arc of the circle from the initial point to the instant point of tangency. Alternatively, the involute is the locus of a point on a straight line when the straight line rolls  round the circumference of a circle without slipping. The involute is best visualised as the path traced out by the end of a piece of cotton when the 

Engineering Thermodynamics Complete lecture notes by Eng.D.L.Kumudu      Download - Click Here Thermodynamics and Energy Heat, energy, transformations, are all ways that thermodynamics is tied into society. Have you ever touched a piece of metal and a piece of wood in the same room? You noticed that the metal felt cooler than the wood, yet are they the same temperature? That is an example of thermodynamics. When your hand touches the metal, your hand releases heat through conductivity, or the ability to conduct heat or energy.When your hand touches the metal, it releases more heat than when your hand touches the wood. Even though the metal feels cooler, they are at the same temperature The concept of thermodynamics came into place when steam engines were becoming popular during the Industrial Revolution.Thermodynamics is the most present science in your life. In fact, it is so present in your daily life it became common sense. It is much more common sense than

Engineering Surveying Exam 2015 Download - Click Here Terms in Levelling  Level surface The surface which is parallel to the mean spheroid surface of the earth is known as Level Surface. A surface over which water will not flow (equipotential) The direction of gravity is always normal to a level surface  Horizontal surface  A surface tangential to the level surface as any point is known as horizontal surface.  Horizontal line  A line lying on the horizontal surface , is known as the horizontal line.  Vertical line The direction indicated by the direction of gravity is known as the vertical line.  Vertical plane A plane containing vertical line is a Vertical plane.  V.Datum A reference surface to which all the heights of the points were referred Can be arbitrary or a National height datum In Sri Lanka we use MSL as the National Datum for heights The surface which defines the MSL is Mean Sea  Level