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CQUAD4 in bending test
#23
O_Stodieck, I have found the problem with the QUAD4 with orthotropic materials. The default QUAD4 in MYSTRAN is actually made up of 4 non-overlapping TRIA3 elements and these triangular elements are not coded to rotate their orthotropic material axes to align with the material axes specified (or implied) on the basic quad shape. I will have to correct this error but, in the meantime, try using:
 
1) Put PARAM, QUAD4TYP, MIN4 into your current bulk data file. The MIN4 version of QUAD4 is an actual quad, with transverse shear flexibility. It does have some issues with spurious modes when the shape is not rectangular. For your problem it is fine. I get agreement with bean theory to 4 significant figures (beam theory deflection = 0.2962, see attached image)

I will put a warning message in MYSTRAN and a stop to let user's know of this problem until it gets fixed


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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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