Benchmark solution
=====================


Calculation method
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The bar is subjected to isotropic compression. The interfaces that cross the block are cohesive, so the bar should behave like a non-cracked bar. In addition, the material is elastic. It is therefore expected to observe the isotropic compression of an elastic material.


Reference quantities and results
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The trips are then given by:

:math:`\begin{array}{c}{u}_{x}=(x)=U(1-\frac{x}{\mathit{LX}})\\ {u}_{y}(y)=0\\ {u}_{z}(z)=-U\frac{z}{\mathit{LZ}}\end{array}`


Uncertainty about the solution
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None, it is an analytical solution.