The forces that act on an object that produce deformations are called stresses.
The tension varies depending on :
The characteristics of the load.
The shape of the obiect bearing the load.
Forces try to bend a body. This stress acts on elements that are support at their extremities and have a weight applied to them. Normally, there are two forces that are separated by a certam distance and a third force acting m the opposite direction.
Forces try to flatten or compress a body. Opposing forces move inwards towards one other along the same trajectory and in opposite directions. The body tends to lose its shape and becomes compressed.
Forces try to stretch the object they are acting upon. Opposing forces move outwards away from the body along the same trajectory but in opposite directions.
Forres try to twist a body They try to turn the ends of the body in opposite directions.
Shear or cutting
The forces act hke two scissor blades. they are very close together,
moving in opposite direcuons, as they try to cut an object.
This stress is the same when we put an oblect over the edge of a table and hit n to try and break it This is also called tensile stress.
A force is anything that can deform a body or change its state of movement or rest
presures of gases
The force of the wind
The force that create our muscles
Forces caused by heat, etc
A structure is the set of elements ui a body that are intended to resist the effects of the forces that act on it.
The forces that act on a structure are called loads.
F ixed or permanent loads :
Don´t vary over the time. They always affect the structure in the same way
Variable loads :
Are occasional and changeable