— For ADINA Users Only —

This is a restricted area meant for current ADINA users only. If your license does not include current support of ADINA, please kindly exit this page.

These Useful Hints and Issues, while reported for the specific version 8.7.5, are usually also applicable to the ADINA versions 8.7.4, 8.7.3, 8.7.2, 8.7.1 and 8.7.0.



Useful Hints and Issues
Regarding the Use of the ADINA System, v. 8.7.5

Issue No. 28, posted January 16, 2012

In the AUI, when the finite element program is set to ADINA CFD, the command to freeform-mesh a body with number of element nodes = 8, 20, or 27 with option 'PYRAMIDS=ONLY' (pyramids on the boundary and tetrahedra in the interior) is wrongly replaced (automatically by the program) with the option 'PYRAMIDS=YES' (bricks, pyramids, and tetrahedra).

There is no workaround. This bug is fixed in v. 8.7.6.


Issue No. 27, posted November 15, 2011

When a TFSI model has a shell element group in the structural model, and there is no initial temperature gradient applied to this shell element group, the TFSI computation may stop abnormally.

As a workaround, specify an initial condition of temperature gradient and apply it to the shell element group. This bug is fixed in v. 8.7.6.


Issue No. 26, posted November 15, 2011

When a printout of global stiffness and mass matrices is requested in modal analysis and if the sparse solver is used, then the index array of matrix coefficients pointing to the equation numbers is corrupted in the corresponding printout file <filename>.mtx. This printout error does not have any effect on the solution of the ADINA program.

As a workaround, the correct index array still can be obtained using the ANALYSIS=DYNAMIC option. This bug is fixed in v. 8.7.6.


Issue No. 25, posted October 25, 2011

When a Nastran model contains rigid target surface definition, the AUI may translate certain contact surface types wrongly as type=coating when importing the Nastran file into the AUI.

If the contact surface is defined by shell elements, i.e., using the BSURF or BCPROP entry, the shell elements may be wrongly deleted.

If the contact surface is defined by solid element faces, i.e., using the BSURFS or BCPROPS entry, the program may issue the following error message and stop.

***INPUT ERROR: BCRPARA CRID= id# with TYPE=COATING is not supported for BSURFS command.

Sometimes, changing the label of the contact surface may avoid this problem. This bug is fixed in v. 8.7.6.


Issue No. 24, posted October 7, 2011

In a shell model with varying thickness elements, the bending moments are incorrect in the elements with varying thickness. The other results (displacements, strains, stresses, etc.) are correct.

The following shell elements are affected: 3-, 4-, 9-, 16-node single layer shell elements using the linear, materially-nonlinear-only and large displacement/small strain formulations.

Shell elements using the large displacement/large strain formulations are not affected. Also, the 3D-shell elements (all formulations) are not affected.

There is no workaround. This bug is fixed in v. 8.7.6.


Issue No. 23, posted October 7, 2011

When importing a Nastran model with 2D contact, the nodes in the model must be defined based on the basic coordinate system, i.e., system 0. When the coordinates of the nodes are defined based on another coordinate system, the AUI program will issue an internal error message.

As a workaround, use only the basic coordinate system for these elements. This bug is fixed in v. 8.7.6.


Issue No. 22, posted October 7, 2011

When importing a Nastran model with 2D contact, the contact type is set to axisymmetric even when the 2D elements are plane stress or plane strain. As a consequence of this, the contact tractions for plane stress or plane strain models are wrong as they are based on the axisymmetric surface area. All other results are correct.

There is no workaround. This bug is fixed in v. 8.7.6.


Issue No. 21, posted October 7, 2011

If a master node in rigid links is fixed and a gravity load is applied, then the reactions do not include the masses allocated to slave nodes.

As a workaround, if possible, instead of fixing the master node, use stiff grounded springs. This bug is fixed in v. 8.7.6.


Issue No. 20, posted September 14, 2011

If the 3D-ITE solver is used in linear analysis, and an op2 file is requested and a significant number of prescribed displacements is applied on the model, then the program crashes.

As a workaround, make one element group nonlinear by specifying a large death time. This bug is fixed in v. 8.7.6.


Issue No. 19, posted September 14, 2011

The material angle of the plastic orthotropic material in a multi-layer shell model may not be taken correctly in the program. As a result, the stress/strain calculation of the whole model is wrong. This issue affects only the plastic orthotropic material model. The elastic orthotropic material model is working correctly.

There is no workaround. This bug is fixed in v. 8.7.6.


Issue No. 18, posted September 14, 2011

The ADINA Thermal program crashes when running a model requiring at least half a million words. The program stops during the memory reallocation process.

The work around is to assign a large memory initially, e.g., in Linux, with the command

adina8.7 -R 100mw

This bug is fixed in v. 8.7.6.


Useful Hints and Issues
Regarding the Use of the ADINA System, v. 8.7.3

Issue No. 17, posted March 21, 2011

Using skew systems for the nodes which are attached to a warping beam may cause the stiffness matrix of the system to become non-positive definite. This happens because skew systems are not supported for the warping beam.

There is no workaround other than not using the skew systems with the warping beams. This bug is fixed in v. 8.7.4.


Issue No. 16, posted March 21, 2011

When there are both potential-based fluid elements and 3D-shell degrees of freedom in the model, the program stops with an error message.

There is no workaround. This bug is fixed in v. 8.7.4.


Useful Hints and Issues
Regarding the Use of the ADINA System, v. 8.7.2

Issue No. 15, posted January 24, 2011

When an STL model with periodic edges (for instance, circles) is loaded into the AUI, the program is supposed to create a point on such edges. This requirement is needed if the user later on wants to mesh the STL body with the hex-dominant mesher (option SIMPLIFY=ALL, which means that the mesher will create an all brick mesh and will "try" to conform to the body's topology and geometry as best as possible).

At present, any attempt to use the hex mesher on this type of model will fail.

There is no workaround. This bug is fixed in v. 8.7.3.


Issue No. 14, posted January 24, 2011

When viscoelastic material models are used in a multilayer shell and the number of Prony terms in each layer is different, the program stops sometimes because of memory corruption, or the solution sometimes may not converge.

There is no workaround. This bug is fixed in v. 8.7.3.


Issue No. 13, posted January 19, 2011

When the Bathe time integration method is used with potential based fluid elements, the results might be incorrect and convergence might be slow. There are two cases when these issues occur:

  1. When there are gravity loads or ground motions in nonlinear analysis (with either linear or subsonic potential based elements). In this case, the results are incorrect.

  2. When subsonic fluid elements are used. The convergence is slow and the results might be incorrect if the tolerances are loose.

These issues occur in all versions of ADINA up to and including v. 8.7.2.

As a workaround, use the Newmark method instead of the Bathe time integration method. Another workaround for case 2 is to tighten the tolerances. This bug is fixed in v. 8.7.3.


Issue No. 12, posted December 16, 2010

If a model contains a spring element group and the universal file output is requested, ADINA crashes when writing to the universal file. No results are written onto the universal file.

There is no workaround. This bug is fixed in v. 8.7.3.


Useful Hints and Issues
Regarding the Use of the ADINA System, v. 8.7.1

Issue No. 11, posted December 10, 2010

In AUI interactive mode, when the user picks a face to apply certain special boundary conditions (SBC, e.g., convection and radiation) on an ADINA CFD model, the program should automatically fill in the body label that the face belongs to in the dialog box. Due to this bug, the body label is not filled in. Since body 0 is the default, this means the SBC is applied to a surface instead of a face. If the surface does not exist, the AUI will give an error when generating the data file. Otherwise, the SBC is applied wrongly on the surface.

As a workaround, the user can manually enter the correct body label in the dialog box. This bug is fixed in v. 8.7.2.


Issue No. 10, posted December 10, 2010

There is a bug in v. 8.7.1 and earlier versions regarding the output of nodal point forces from 3D tetrahedral elements during postprocessing in the AUI.

If the porthole file is unformatted, the nodal point forces are obviously incorrect. If the porthole file is formatted, the porthole file cannot be loaded.

There is no workaround. This bug is fixed in v. 8.7.2.


Issue No. 9, posted December 10, 2010

When concentrated masses are applied on slave nodes, if more than one master node is used in constraint equations and a consistent mass matrix is used, then the off-diagonal (coupling) terms are not included in the analysis.

There is no workaround. This bug is fixed in v. 8.7.2.


Issue No. 8, posted December 10, 2010

If the number of constraint equations given by the AUI in the *.dat files is larger than the number of constraint equations found by the ADINA program (this might happen when not all DOFs are constrained in rigid links), then the program crashes.

There is no workaround. This bug is fixed in v. 8.7.2.


Issue No. 7, posted December 10, 2010

In dynamic implicit analysis, when the Newmark method is used and most of the DOFs have prescribed displacements applied on them, then the reactions might be incorrect.

There is no workaround. This bug is fixed in v. 8.7.2.


Issue No. 6, posted December 10, 2010

If temperature loading is applied on beams with moment-curvature relations, then the results are incorrect if stresses are requested.

As a workaround, request forces instead of stresses. This bug is fixed in v. 8.7.2.


Issue No. 5, posted December 10, 2010

The critical buckling load on the universal output file is wrong. ADINA wrongly writes the eigenvalues for the buckling loads in the file.

There is no workaround. This bug is fixed in v. 8.7.2.


Issue No. 4, posted December 10, 2010

The x-direction stretch for 2D plane stress elements with viscoelastic material and ULH large strain option is wrong. All other results of the analysis are still correct.

There is no workaround. This bug is fixed in v. 8.7.2.


Issue No. 3, posted December 10, 2010

Contact with element birth does not work correctly in versions 8.7.0 and 8.7.1. When an element is born, the target contact segments on the born elements are not activated.

This bug is fixed in v. 8.7.2. There is no workaround.


Issue No. 2, posted December 10, 2010

When using double-sided contact, it can happen that a contactor node is almost on the target at time t, then penetrates the target at time t+dt, due to contact not being detected.

This bug is fixed in v. 8.7.2. There is no workaround, other than to avoid having contactor nodes almost on the target at time t.


Issue No. 1, posted December 10, 2010

When using mesh glueing, with the default stiffness stabilization settings, wrong results can be obtained sometimes in linear analysis, and the convergence rate can be very slow (sometimes) in nonlinear analysis.

In order to fix this bug, the default stiffness stabilization used for mesh glueing is changed in version 8.7.2. For more information about mesh glueing and stiffness stabilization in version 8.7.2, see the Readme file (Section 1.1) and also the ADINA Theory and Modeling Guide (Section 11.15).

To work around the bug, specify stiffness stabilization and use a very small value for the stiffness stabilization factor, for example 1E-14.



For Useful Hints and Issues regarding the use of earlier versions of the ADINA System, see here

Version 8.6       Version 8.5       Version 8.4