Example 525: 10% uniaxial extension of a unit cube with fibres (30 degrees)

A 3D unit cube of incompressible transversely isotropic material (exponential material law) where the fibre direction is at a constant 30 degree angle wrt the X axis, is displacement loaded on the X=1 face by 10% in the X direction while keeping the X=0 face fixed (uniaxial extension).

The comfile run by this example is as follows:

#Example_525  10% uniaxial extension of a unit cube with fibers (30 degrees)
 
fem
fem define coordinates;r;unifib30;example #Define 3D rect cartesian.
fem define node;r;;example	       #Defines 8 nodes.
fem define base;r;;example	       #Defines 3 basis functions.
fem define element;r;;example      #Defines 1 element.
fem define fibre;r;;example            #Define fibre orientations in
#                                      !  the 1-2 plane for all 8 nodes
#                                      !  in DEGREES wrt Xi 1 direction
#                                      !   as 30 degrees.
fem define element;r;;example fibre    #Defines fibre element.
fem define window
fem draw lines
fem draw fibres
fem define equation;r;;example     #Defines equation information.
fem define material;r;;example     #Defines material information.
fem define initial;r;;example      #Defines initial conditions.
fem define solve;r;;example	       #Defines solution information.
fem solve step 1 error 1.0D-10 #Solve the problem.
fem draw line deformed dotted
fem list strain at 1 ref       #List strain information wrt reference
#                              !  coordinates at 1st gauss point.
fem list stress at 1 ref       #List stress information wrt reference
#                              !  coordinates at 1st gauss point.
#
#              !Compare these stress and strain results with that in the
#              !  previous problem where the orientation was 0 degrees.
#              !  Note that the stress in the X-direction (direction of
#              !  elongation) is decreasing because the amount of force
#              !  necessary to cause the same elongation is less due to
#              !  the cross-fibre stiffness being smaller than the fibre
#              !  stiffness.  These results, however, will depend on the
#              !  magnitude of the material parameters chosen - a larger
#              !  alpha(5) in comparison to alpha(3) will result in
#              !  higher stiffness in shear.

Additional testing commands:

fem list stress at 1 ref
fem list strain at 1 ref

Files used by this example are:

Name                 Modified     Size

example_525.com      10-Apr-2000  2.0k
test_output.com      10-Apr-2000   50 
unifib30.ipbase      10-Apr-2000  3.5k
unifib30.ipcoor      10-Apr-2000  633 
unifib30.ipelem      10-Apr-2000  471 
unifib30.ipelfb      10-Apr-2000  237 
unifib30.ipequa      02-May-2004  2.1k
unifib30.ipfibr      30-Jan-2001  1.0k
unifib30.ipinit      05-Dec-2002  2.9k
unifib30.ipmate      22-Mar-2004  3.0k
unifib30.ipnode      10-Apr-2000  1.9k
unifib30.ipsolv      16-Aug-2010  2.4k
unifib30.ipsolv.old  13-Apr-2007  2.2k

Download the entire example:

Name                      Modified     Size

examples_5_52_525.tar.gz  14-Aug-2014  7.2k

Testing status by version:

Testing status by file:

• cmiss_test.log
  

  i686-linux
  Success	cm:	cmiss_test.log.retain.
  Success	cm-debug:	cmiss_test.log.retain.
  mips-irix
  Success	cm:	cmiss_test.log.retain.
  Success	cm-debug:	cmiss_test.log.retain.
  Success	cm-debug-clear-malloc:	cmiss_test.log.retain.
  Success	cm-debug-clear-malloc7:	cmiss_test.log.retain.
  Success	cm64:	cmiss_test.log.retain.
  Success	cm64-debug:	cmiss_test.log.retain.
  Success	cm64-debug-clear-malloc:	cmiss_test.log.retain.
  rs6000-aix
  Success	cm:	cmiss_test.log.retain.
  Success	cm-debug:	cmiss_test.log.retain.
  Success	cm64:	cmiss_test.log.retain.
  Success	cm64-debug:	cmiss_test.log.retain.
  x86_64-linux
  Success	cm:	cmiss_test.log.retain.
  Success	cm-debug:	cmiss_test.log.retain.

  
  
• cmiss_test.out
  

  i686-linux
  Success	cm:	ndiff test: no significant differences with generic answer.
  Success	cm-debug:	ndiff test: no significant differences with generic answer.
  mips-irix
  Success	cm:	ndiff test: no significant differences with generic answer.
  Success	cm-debug:	ndiff test: no significant differences with generic answer.
  Success	cm-debug-clear-malloc:	ndiff test: no significant differences with generic answer.
  Success	cm-debug-clear-malloc7:	ndiff test: no significant differences with generic answer.
  Success	cm64:	ndiff test: no significant differences with generic answer.
  Success	cm64-debug:	ndiff test: no significant differences with generic answer.
  Success	cm64-debug-clear-malloc:	ndiff test: no significant differences with generic answer.
  rs6000-aix
  Success	cm:	ndiff test: no significant differences with generic answer.
  Success	cm-debug:	ndiff test: no significant differences with generic answer.
  Success	cm64:	ndiff test: no significant differences with generic answer.
  Success	cm64-debug:	ndiff test: no significant differences with generic answer.
  x86_64-linux
  Success	cm:	ndiff test: no significant differences with generic answer.
  Success	cm-debug:	ndiff test: no significant differences with generic answer.

  
  

Html last generated: Sun Mar 6 05:50:22 2016

Input last modified: Thu Aug 14 10:03:13 2014