Blatz-Ko material

Example 5a2: Blatz-Ko material

Using general Blatz-Ko strain energy function to solve an unit compressible cube. W=0.5*mu*alpha*[(J1-3)+beta*(J3^(-2/beta)-1)] +0.5*mu*(1-alpha)*[(J2-3)+beta*(J3^(2/beta)-1)] where J1=I1, J2=I2/I3, J3=I3^0.5, beta=(1-2*nu)/nu, nu is Poisson's ratio.

The comfile run by this example is as follows:

### using general Blatz-Ko strain energy function    
### to solve an unit compressible cube 
### W=0.5*mu*alpha*[(J1-3)+beta*(J3^(-2/beta)-1)]
###   +0.5*mu*(1-alpha)*[(J2-3)+beta*(J3^(2/beta)-1)]
### where J1=I1, J2=I2/I3, J3=I3^0.5, beta=(1-2*nu)/nu,
### nu is Poisson's ratio 
###
###
fem define parameters;r;Blatz-Ko;example;		
fem define coordinates;r;;example;         # 3D rectangular cartesian (x,y,z).
fem define base;r;;example;                # 3D linear Lagrange.
fem define nodes;r;;example;  		
fem define elements;r;;example;
fem define fibre;r;;example;               # Default all fibre angles to zero 
#                                          # for isotopic material.
fem define elements;r;;example fibre;
fem define equation;r;;example;            # 3D compressible finite elasticity
fem define material;r;;example;            # Blatz-Ko material, mu=1, alpha=0,
#                                          # nu=0.25.
fem define initial;r;;example;             # Uniaxial elongation 0.25 in x-direction.
fem define solve;r;;example;			
fem solve;
#fem list stress full;                          # List second Piola-Kirchhoff & Cauchy stresses.
#fem update geometry from solution;
#fem list elements;                        # List lambda1, lambda2, lambda3

Additional testing commands:

### Testing example 5a2

fem list stress;
fem update geometry from solution;
fem list nodes solution;
fem list element solution;

Files used by this example are:

Name                 Modified     Size

example_5a2.com      13-Dec-2002  1.3k
Blatz-Ko.com         02-Dec-2002  1.3k
Blatz-Ko.ipbase      26-Nov-2002  4.2k
Blatz-Ko.ipcoor      26-Nov-2002  568 
Blatz-Ko.ipelem      26-Nov-2002  404 
Blatz-Ko.ipelfb      26-Nov-2002  233 
Blatz-Ko.ipequa      02-May-2004  1.9k
Blatz-Ko.ipfibr      26-Nov-2002  1.0k
Blatz-Ko.ipinit      05-Dec-2002  1.4k
Blatz-Ko.ipmate      05-Dec-2002  2.1k
Blatz-Ko.ipnode      28-Nov-2002  1.7k
Blatz-Ko.ippara      15-Apr-2008  6.0k
Blatz-Ko.ipsolv      16-Aug-2010  2.7k
Blatz-Ko.ipsolv.old  13-Apr-2007  2.5k
Blatz-Ko.opelem      02-Dec-2002  3.4k
Blatz-Ko.opnode      02-Dec-2002  1.7k
Blatz-Ko.opstre      02-Dec-2002  8.3k
test_output.com      16-Dec-2002  129

Download the entire example:

Name                      Modified     Size

examples_5_5a_5a2.tar.gz  14-Aug-2014   12k

Testing status by version:

	Status	Tested	Real time (s)
i686-linux
cm	Success	Sun Mar 6 00:02:02 2016	0
cm-debug	Success	Sat Mar 5 00:02:22 2016	1
mips-irix
cm	Success	Sun Aug 19 01:27:15 2007	3
cm-debug	Success	Wed Aug 15 01:24:02 2007	6
cm-debug-clear-malloc	Success	Sat Aug 18 01:28:23 2007	12
cm-debug-clear-malloc7	Success	Mon Aug 20 01:25:12 2007	11
cm64	Success	Sun Aug 19 01:23:01 2007	3
cm64-debug	Success	Tue Aug 21 01:20:56 2007	5
cm64-debug-clear-malloc	Success	Tue Feb 1 09:45:00 2005	3
rs6000-aix
cm	Success	Wed Mar 4 01:07:28 2009	1
cm-debug	Success	Mon Mar 2 01:06:24 2009	2
cm64	Success	Wed Mar 4 01:07:28 2009	1
cm64-debug	Success	Tue Mar 3 01:11:45 2009	1
x86_64-linux
cm	Success	Sun Mar 6 00:01:03 2016	0
cm-debug	Success	Sat Mar 5 00:01:14 2016	0

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 05:50:26 2016

Input last modified: Thu Aug 14 10:03:15 2014

CMISS Help / Examples / 5 / 5a / 5a2