Engineering normal strain is total deformation over initial dimension
=====================================================================

*Engineering normal strain*, also called *Cauchy strain*, is expressed as the ratio of total
deformation to the initial dimension of a material body on which forces are applied.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/Strain_(mechanics)#Engineering_strain>`__.

.. py:currentmodule:: symplyphysics.laws.dynamics.deformation.engineering_normal_strain_is_total_deformation_over_initial_dimension

.. py:data:: engineering_normal_strain

    :attr:`~symplyphysics.symbols.classical_mechanics.engineering_normal_strain` of the body.

Symbol:
    :code:`e`

Latex:
    :math:`e`

Dimension:
    :code:`dimensionless`


.. py:data:: total_deformation

    Total :attr:`~symplyphysics.symbols.classical_mechanics.deformation` of the body.

Symbol:
    :code:`Delta(l)`

Latex:
    :math:`\Delta l`

Dimension:
    :code:`length`


.. py:data:: initial_dimension

    Initial dimension of the body, e.g. initial :attr:`~symplyphysics.symbols.classical_mechanics.length`.

Symbol:
    :code:`l`

Latex:
    :math:`l`

Dimension:
    :code:`length`


.. py:data:: law

    :code:`e = Delta(l) / l`


    Latex:
        .. math::
            e = \frac{\Delta l}{l}