Forces Engineering Science S4. Forces There are a number of different forces which act on objects all around us An example of some forces are: Static.

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Presentation transcript:

Forces Engineering Science S4

Forces There are a number of different forces which act on objects all around us An example of some forces are: Static Dynamic Bending Shearing

Forces Static When a static load or force is applied to structures, the structures do not normally move. Normally the total downwards force comprises the weight of the structure plus the load it is carrying.

Forces Dynamic When dynamic loads or forces are applied to a structure, the structure does move and the forces applied can be varied. Dynamic forces are produced by a variety of means and effects: machines, wind directions, people, etc.

Forces Bending Structures that carry loads across their length are subject to bending forces.

Forces Shearing Shear forces can be described as tearing or cutting forces affecting structures. Simple examples are a pair of scissors

Forces Torsion Torsion or torque forces have the effect of trying to turn or twist a structure or a piece of material. For example, a screwdriver being twisted

Forces Compression Compression forces occur when there is a force pushed down on an object with a force pushing up on it at the same time.

Forces Tension / Tensile Tension happens when there is two forces both pulling on an object. A rope in a tug of war is under tension.