Engineering (unit 3)

• A Moment of a force is defined as


  Force and the perpendicular distance to the line of action of the force.
• The types of loading in members of framed structures are.

  Compression and tension
• static equilibrium


  A condition where there are no net external forces acting upon a particle or rigid body and the body remains at rest.

  The sum of all of the moments horizontal and vertical forces equal 0.
• Non - Concurrent Forces


  are forces that do not meet in one common point.
• Concurrent forces


  Two or more forces acting on a common point but pulling or pushing in different directions.
• Co-planar Forces


  forces acting in the same plane
• Non-coplanar forces


  Forces that do not lie in the same plane and have a three dimensional arrangement.
• The elastic limit is the end point for.


  Hooke's Law
• Young's Modulus


  The elastic property of solids that describes the inherent stiffness of the material. It is also the slope of the stress-strain curve in the elastic region.
• A resultant force is


  is the sum of the given forces.
• bending force


  a combination of push (compression) and pull (tension) forces that results in a temporary curving change in the shape of some structures
• Name the two main areas in which mechanics can be divided.

  Statics and Dynamics
• A force directed parallel to a surface

  Shear force
• When designing a truss it is important to know the variation of the ....

  External Forces
• corrosion


  the gradual wearing away of a metal element due to a chemical reaction
• True or False:

  The stress strain graph would better represent mild steel rather than silicone.

  True

  
• compressive strength


  the resistance of a material to breaking under compression.
• Hardness


  A measure of how easily a mineral can be scratched
• tensile strength


  A measure of how much stress from pulling, or tension, a material can withstand before breaking.
• Coastal engineering are concerned with the hydrodynamic impact (waves, tides, natural disasters, saltwater) and morphodynamic changes of the coastal topography, and coastal zone management.
• Construction engineers deal with the designing, planning, construction and management of infrastructures.
• Earthquake engineers design and analyze structures to make structures more resistant to earthquakes.
• Environmental engineers aim to protect human health, natures ecosystems, and improve the environmental-related quality of life.
• Water resource engineers are concerned with the flow and conveyance of fluids, mostly water and sewage.
• Structural engineers create the form and shape of man made structures.