[web] Added Lubby2; Creep example.

web/archetypes/benchmark.md

@@ -10,7 +10,7 @@ project = "[TODO].prl"
 
 {{< project-link >}}
 
-## Equations
+## Problem description
 
 ## Input files
 

web/content/docs/benchmarks/small-deformations/mechanics-lubby2-shear-traction.md

++++
+project = "Mechanics/Burgers/cube_1e3.prj"
+author = "Dmitri Naumov"
+date = "2017-02-15T12:58:36+01:00"
+title = "Lubby2; Creep example"
+
+[menu]
+  [menu.benchmarks]
+    weight = 2
+    parent = "small-deformations"
+
++++
+
+{{< project-link >}}
+
+## Problem description
+
+We solve a non-linear small deformation problem on a cube with shear traction on the top boundary face. The 3D problem is setup identical to the corresponding 2D problem.
+
+See the TODO: {asset:795:link}-PDF for detailed problem description.
+
+## Results and evaluation
+
+Result showing the displacement field and distortion relative to the initial configuration:
+
+{{< img src="../lubby2.png" >}}
+
+Displacement of the top surface in the direction of the shear traction over time showing the elastic and viscous deformations (creep):
+
+{{< img src="../lubby2_creep_over_time.png" >}}