Euler-Bernoulli beam model is the most simple model to describe the behaviour of beam. Its basic assumptions are:

The cross section of beam will remain planar in bending

The cross section of beam will not stretch in bending

The transversal shearing deformation of beam is insignificant

Deformations are considered small.

The cross section of Euler-Bernoulli beam remains perpendicular to beam neutral axis in bending. The figure below illustrates Euler-Bernoulli beam.

The dependency between loading of beam and its displacement can be derived from the basic assumptions. The dependency can be presented with following equation:

,where

EI = flexural rigidity

w = displacement of beam neutral axis

q = loading of beam

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