DEFINITION: When the external force acts on a body, the body tends to undergo
some deformation. Due
to “Cohesion b/w the MOLECULES” the body resists deformation. The
resistance which opposes the deformation is known as STRENGTH
OF MATERIAL.
Our concern in SOM is to study “The the behavior of materials when it is subjected to forces and moments”. Each member of a structure are made up of
certain materials, which could be rigid or deformable.
RIGID MATERIALS: Which doesn’t
undergo any changes in its geometry, size or shape when it is subjected to the external force are known as rigid
materials.
All materials are deformable and the
idea of rigid material is the only
conceptual idealization. The term “rigid
material” just used for simplification
of the structural analysis.
DEFORMABLE MATERIALS: Which undergo any changes in its
geometry, size or shape when it is
subjected to a external force are known as deformable
materials.
DEFORMATION: The geometrical changes of a body due to external forces are
known as deformation.
COHESION: The property of sticking together is known as cohesion.
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