Author: Stefan Hartman
Date: 2014-06-18 03:12:09 -0700 (Wed, 18 Jun 2014)
New Revision: 5496

Modified:
   branches/R7.1/Vol_II_Materials/MAT_054__MAT_ENHANCED_COMPOSITE_DAMAGE.docx
   trunk/Vol_II_Materials/MAT_054__MAT_ENHANCED_COMPOSITE_DAMAGE.docx
Log:
Corrected some enhancements to MAT_054 for thick shells type 3 & 5

__________________________________________________________
TSHELLS:
I don't think there is any reason for lack of support by forms 1 and 2
other than the work was not done to enable them.  With some effort, I
think a number of materials could be enabled for thick shells.

Regards,
Lee
9/12/12

I confirmed with
the attached test case that tshell forms 1 and 2 don't accept
mat_054 whereas tshell forms 3 and 5 are OK with it.
Jim 
9/12/12
________________________________________
In any case, here's what I can gather from my reading of the code -

The fiber and matrix failure criteria are applied only to the local x-y plane of the element, and the out-of-plane constitutive relation is not affected. In essence, for the purpose of calculating the damage, the x-y plane of the solid element is considered as a shell surface.

Some of the history variables are as follows:

1 failure flag tensile fiber mode
2 failure flag compr. fiber mode
3 failure flag tensile matrix mode
4 failure flag compr. matrix mode
5 total failure
6 damage parameter (SOFT)
15 local fiber strain
16 local matrix strain
17 local shear strain


Ushnish 
9/17/12

Ushnish or I will dissect f3dm54 as necessary to resolve any
questions about mat54 solids.   From your earlier comments, you
indicated that Dynamore was not involved in development of f3dm54 so I
shouldn't have been bothering you and Stefan in the first place.
Jim

yes, these materials were developed by Dynamore for shells a long time ago. I think the extension to solid elements (f3dm54) was done later by John, but I am not sure. And I saw that for mte.eq.54 and mte.eq.55 the same subroutine f3dm54 is called. For me, it seems that only material 54 will work correctly. 
History variables of shell mat 54 and solid mat54 should be the same for numbers 1 to 6.

Best regards,
Tobias
9/5/12
___________________________________________________________
From http://www.dynasupport.com/howtos/material/history-variables, 

1 failure flag tensile fiber mode
2 failure flag compr. fiber mode
3 failure flag tensile matrix mode
4 failure flag compr. matrix mode
5 total failure
6 damage parameter (SOFT) 


      common/aux14loc/
ccc 19.6.89  ma                                 18.07.89
c            neue felder:  ec,qq1,qq2,d,ec2,    dt
cge...reihenfolge vertauscht   23.11.90
     &sig1(nlq),sig2(nlq),sig3(nlq),sig4(nlq),
     &sig5(nlq),sig6(nlq),sig7(nlq),
     &ef(nlq),ec(nlq),em(nlq),ed(nlq),
     &efail(nlq),dam(nlq),dtfail(nlq),
     &q1(nlq),
     &q11(nlq),q12(nlq),q13(nlq),q31(nlq),
     &q32(nlq),q33(nlq),
     & eps1(nlq),eps2(nlq),eps4(nlq),
     &qq1(nlq),qq2(nlq),
     &ef2(nlq),ec2(nlq),em2(nlq),ed2(nlq),c11(nlq),