Types of stresses
The basic stresses that a body may have to support are compression , tension, bending, torsion and shear.
Conditions for strong structures
One essential characteristic for any structure is that it must be strong, so it must be rigid, in equilibrium and stable.
Equilibrium: A body is in equilibrium when its structure remains stationary.
Rigidity: If a material is rigid, it does not change shape when force is applied.
Stability: A body is in stable equilibrium if it does not move when a force is applied to it.
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