eps11  =
NU*sig11   NU*sig22    sig11     sig22    NU*sig33   NU*sig11   NU*sig12   NU*sig22   sig11    sig12
-------- - -------- + ------- - ------- - -------- - -------- + -------- - -------- + ------ - ------
2*B12*E    2*B12*E    2*B12*E   2*B12*E     A3*E      4*A2*E     2*A2*E     4*A2*E    4*A2*E   2*A2*E

   sig22    NU*sig11   NU*sig12   NU*sig22   sig11    sig12    sig22 
 + ------ - -------- - -------- - -------- + ------ + ------ + ------
   4*A2*E    4*A1*E     2*A1*E     4*A1*E    4*A1*E   2*A1*E   4*A1*E


eps22  = 
  NU*sig11   NU*sig22    sig11     sig22    NU*sig33   NU*sig11   NU*sig12   NU*sig22   sig11    sig12
- -------- + -------- - ------- + ------- - -------- - -------- + -------- - -------- + ------ - ------
  2*B12*E    2*B12*E    2*B12*E   2*B12*E     A3*E      4*A2*E     2*A2*E     4*A2*E    4*A2*E   2*A2*E

   sig22    NU*sig11   NU*sig12   NU*sig22   sig11    sig12    sig22 
 + ------ - -------- - -------- - -------- + ------ + ------ + ------
   4*A2*E    4*A1*E     2*A1*E     4*A1*E    4*A1*E   2*A1*E   4*A1*E


eps33  =
sig33   NU*sig11   NU*sig12   NU*sig22   NU*sig11   NU*sig12   NU*sig22
----- - -------- + -------- - -------- - -------- - -------- - --------
 A3*E    2*A2*E      A2*E      2*A2*E     2*A1*E      A1*E      2*A1*E 

eps12  = 
-A1*sig11 + 2*A1*sig12 - A1*sig22 + A2*sig11 + 2*A2*sig12 + A2*sig22
--------------------------------------------------------------------
   
                          8*A1*A2*G                              
eps13  = 
    sig13    
-------------
G*(B13 + B23)


eps23  = 
    sig23    
-------------
G*(B13 + B23)


sig11  = 
  A1*E*NU*eps33   A1*E*eps11   A1*E*eps22            2                                      A2*E*N
- ------------- - ---------- - ---------- + 2*A1*G*NU *eps12 + A1*G*NU*eps12 - A1*G*eps12 - ------
        2             4            4                                                              
--------------------------------------------------------------------------------------------------
                                                                                                  
                                                                                                  

U*eps33   A2*E*eps11   A2*E*eps22            2                                                    
------- - ---------- - ---------- - 2*A2*G*NU *eps12 - A2*G*NU*eps12 + A2*G*eps12 + B12*E*NU*eps11
2             4            4                                                                      
--------------------------------------------------------------------------------------------------
                    2                                                                             
                2*NU  + NU - 1                                                                    

                    B12*E*eps11   B12*E*eps22
 - B12*E*NU*eps22 - ----------- + -----------
                         2             2     
---------------------------------------------
                                             
                                             
sig22  = 
  A1*E*NU*eps33   A1*E*eps11   A1*E*eps22            2                                      A2*E*N
- ------------- - ---------- - ---------- + 2*A1*G*NU *eps12 + A1*G*NU*eps12 - A1*G*eps12 - ------
        2             4            4                                                              
--------------------------------------------------------------------------------------------------
                                                                                                  
                                                                                                  

U*eps33   A2*E*eps11   A2*E*eps22            2                                                    
------- - ---------- - ---------- - 2*A2*G*NU *eps12 - A2*G*NU*eps12 + A2*G*eps12 - B12*E*NU*eps11
2             4            4                                                                      
--------------------------------------------------------------------------------------------------
                    2                                                                             
                2*NU  + NU - 1                                                                    

                    B12*E*eps11   B12*E*eps22
 + B12*E*NU*eps22 + ----------- - -----------
                         2             2     
---------------------------------------------
                                             
                                             
sig33  = 
-A3*E*(NU*eps11 + NU*eps22 - NU*eps33 + eps33) 
-----------------------------------------------
                     2                         
                 2*NU  + NU - 1                

sig12  = 
  A1*E*NU*eps33   A1*E*eps11   A1*E*eps22            2                                      A2*E*N
- ------------- - ---------- - ---------- + 2*A1*G*NU *eps12 + A1*G*NU*eps12 - A1*G*eps12 + ------
        2             4            4                                                              
--------------------------------------------------------------------------------------------------
                                                                                       2          
                                                                                   2*NU  + NU - 1 

U*eps33   A2*E*eps11   A2*E*eps22            2                                   
------- + ---------- + ---------- + 2*A2*G*NU *eps12 + A2*G*NU*eps12 - A2*G*eps12
2             4            4                                                     
---------------------------------------------------------------------------------
                                                                                 
                                                                                 
sig13  = 
G*eps13*(B13 + B23)


sig23  = 
G*eps23*(B13 + B23)
