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CQUAD4 in bending test
#4
(08-27-2020, 06:26 PM)Admin Wrote: Can you check the reaction forces to make sure you are applying the correct load? There is a 0.1 scaling factor in the FORCE card so you may want to double check that. Have you tried an isotropic material to see if the results are correct for that first? I will let Bill know as well.

Reaction forces are correct - factor of 0.1 is intended. 
The element node numbering is such that the vectors from grids 1 to 2 point in the x-direction for all elements - this is matched in the comparison models - so I don't think this is an input error? Besides, the results are not any closer if the plies are set to 90deg in the PCOMP cards. 

As you suggested, I reran the model using an isotropic material - results are much closer (<2% error).
Comparing Zmax in the T3 deflection at grid 737:

Analytical (Bernoulli beam):
I = (1.25e-04*12)**3*0.15/12 = 4.21875e-11
F = 0.1
L = 1.5
E = 70.0E9
Zmax  = F*L**3/(3*E*I) = 0.038095

Mystran (see file attached)
Zmax = 3.762719E-02


Attached Files
.txt   isotropic_shell_bending_1.txt (Size: 122.1 KB / Downloads: 14)
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Messages In This Thread
CQUAD4 in bending test - by O_Stodieck - 08-27-2020, 06:01 PM
RE: CQUAD4 in bending test - by Admin - 08-27-2020, 06:26 PM
RE: CQUAD4 in bending test - by O_Stodieck - 08-27-2020, 09:22 PM
RE: CQUAD4 in bending test - by drbillc - 08-27-2020, 08:40 PM
RE: CQUAD4 in bending test - by drbillc - 08-27-2020, 10:28 PM
RE: CQUAD4 in bending test - by Admin - 08-28-2020, 12:02 AM
RE: CQUAD4 in bending test - by O_Stodieck - 08-28-2020, 07:55 PM
RE: CQUAD4 in bending test - by drbillc - 08-28-2020, 12:05 AM
RE: CQUAD4 in bending test - by Admin - 08-28-2020, 12:24 AM
RE: CQUAD4 in bending test - by drbillc - 08-28-2020, 01:29 AM
RE: CQUAD4 in bending test - by Admin - 08-28-2020, 08:16 PM
RE: CQUAD4 in bending test - by O_Stodieck - 08-28-2020, 08:50 PM
RE: CQUAD4 in bending test - by drbillc - 08-29-2020, 12:59 AM
RE: CQUAD4 in bending test - by O_Stodieck - 08-30-2020, 11:28 AM
RE: CQUAD4 in bending test - by Admin - 08-29-2020, 07:57 PM
RE: CQUAD4 in bending test - by Admin - 08-30-2020, 04:45 PM
RE: CQUAD4 in bending test - by O_Stodieck - 09-03-2020, 08:56 PM
RE: CQUAD4 in bending test - by Admin - 09-03-2020, 11:59 PM
RE: CQUAD4 in bending test - by ceanwang - 09-04-2020, 12:06 AM
RE: CQUAD4 in bending test - by Admin - 09-04-2020, 03:50 PM
RE: CQUAD4 in bending test - by Admin - 09-09-2020, 12:30 AM
RE: CQUAD4 in bending test - by Admin - 09-09-2020, 02:40 PM
RE: CQUAD4 in bending test - by drbillc - 09-09-2020, 05:35 PM
RE: CQUAD4 in bending test - by O_Stodieck - 09-09-2020, 06:27 PM
RE: CQUAD4 in bending test - by Admin - 09-09-2020, 07:13 PM
RE: CQUAD4 in bending test - by drbillc - 09-10-2020, 01:15 PM
RE: CQUAD4 in bending test - by Admin - 09-11-2020, 05:33 AM
RE: CQUAD4 in bending test - by Admin - 09-13-2020, 01:53 AM

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