Example 527: 10% uniaxial extension of a unit cube with fibres (90 degrees)

A 3D unit cube of incompressible transversely isotropic material (exponential material law) where the fibre direction is at a constant 90 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_527  10% uniaxial extension of a unit cube with fibers (90 degrees)
 
fem
fem define coordinates;r;unifib90;example #Defines rectangular 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 90 degrees.
fem define element;r;;example fibre
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.
 
              #For this 90 degree orientation, the stress in the
              #  X-direction is the lowest out of all 4 directions. The
              #  amount of shortening in the Y-direction (fibre
              #  direction) is not the same as in the Z-direction
              #  because the stiffnesses are different.

Additional testing commands:

# There are repeated eigenvalues so Euler angles and eigenvectors are not unique.
fem list stress at 1 ref
fem list strain at 1 ref

Files used by this example are:

Name                 Modified     Size

example_527.com      10-Apr-2000  1.5k
test_output.com      10-Apr-2000  132 
unifib90.ipbase      10-Apr-2000  3.4k
unifib90.ipcoor      10-Apr-2000  608 
unifib90.ipelem      10-Apr-2000  446 
unifib90.ipelfb      10-Apr-2000  275 
unifib90.ipequa      02-May-2004  2.1k
unifib90.ipfibr      30-Jan-2001  1.1k
unifib90.ipinit      05-Dec-2002  2.9k
unifib90.ipmate      13-Oct-2003  3.0k
unifib90.ipnode      10-Apr-2000  1.9k
unifib90.ipsolv      16-Aug-2010  2.3k
unifib90.ipsolv.old  13-Apr-2007  2.2k

Download the entire example:

Name                      Modified     Size

examples_5_52_527.tar.gz  14-Aug-2014  7.1k

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 10:03:14 2014