Reference problem
====


Geometry
----

We are interested in a cube subjected to a tensile force comprising a horizontal circular crack with radius :math:`a\mathrm{=}2m`. We will consider a cube with side :math:`10a`.


.. image:: images/1000000000000257000001F26ACBD3D1950A819C.png
    :width: 2.4957in
    :height: 2.0752in


.. _RefImage_1000000000000257000001F26ACBD3D1950A819C.png:

**Figure** 1.1-a **: geometry**

Material properties
----

We consider a homogeneous isotropic elastic linear material whose characteristics are the following:


*   Young's module :math:`E\mathrm{=}\mathrm{200 000}\mathit{Mpa}`,


*   Poisson's ratio :math:`\nu \mathrm{=}\mathrm{0,3}`.


Boundary conditions and loads
----

The structure is in tension (:math:`\sigma \mathrm{=}1\mathit{MPa}`).