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


Calculation method used for the reference solution
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Without friction, the contact pressure at the interface is equal to the pressure imposed.


Benchmark results
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The contact pressure is constant and equal to :math:`25\mathit{MPa}` over the entire contact surface.


Uncertainty about the solution
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Analytical solution.


Bibliographical reference
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1. N. EL- ABBASI and K.J. BATHE: "*Stability and Patch Test Performance of Contact Discretizations and a New Solution Algorithm* ", Computers & Structures, 79, 1473-1486, 2001