Stress in beams

Stress in beams

Types of stresses that affect beams. The arrows show the direction of force.

Types of stresses that affect beams. The arrows show the direction of force.

ZIMSEC O Level Combined Science Notes: Stress in beams

  • If a material (beam) is subjected to a force, an equal force acts in the opposite direction
  • This force is known as reaction
  • This results in forces being set up inside the material(beam)
Forces and reaction. i) A load resting on the ground. ii)A balanced lever

Forces and reaction. i) A load resting on the ground. ii)A balanced lever

  • These internal forces are known as stresses
  • stress-forces that occur inside a material as a result of forces acting within it
  • There are three types of stress
  • Tensile stresses-is a result of stretching forces.
  • They are created by forces trying to pull the material apart
  • compressive stresses-are a result of forces acting in opposite direction with one another creating a squashing effect.
  • They are produced by forces trying to compress material
  • shear stresses- these are also known as twisting forces
  • they are produced by equal and opposite forces which are not in line.
  • They tend to make one part of the material slide over one another.

Load and shape

  • when a load is applied to a material
  • Stresses are produced
  • Most times there is also a change of shape especially if the material is not rigid

To access more topics go to the Combined Science Notes page.

By |2017-01-17T11:14:31+00:00March 14th, 2016|Notes, O Level Science Notes, Ordinary Level Notes|Comments Off on Stress in beams

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He holds an Honours in Accountancy degree from the University of Zimbabwe. He is passionate about technology and its practical application in today's world.
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