STRUCTURES
FORCES
Is anything that can deform a body (static effect) or change its state of movement or rest dynamic effect.
Types
Static effects
Dynamic effects
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LOAD
They are the forces that act on a structure.
Types
Fixed or permanent loads
They always affect the structure in the same way.
Variable loads
They are occasional or changeable.
STRESSES
Forces that can deform a body
The tension varies depending on...
Loads acts on the bodies, causing internal tensions. This tensions are called stresses.
...the characteristics of loads: intensity direction, trajectory and point of aplication.
...the shape of the objets bearing the loads.
Types
Traction
A struture is a set of elements in a body that are intended to resist the forses that act on it. A struture prevents a body from breaking or becoming too deformed.
Forces try to stretch the object they are acting upon.
Bending
Forces try to bend a body
Compression
Torsion
Shear or cutting
Forces try to flatten or compress a body
Forces try to twist a body
Forces act like two scissor blades and like when we hit an object to the edge of a table to try break it. Also called tensile stress.