I faced with a problem. I work in the program version 2020R2. When exporting geometry from eigenvalue buckling to mechanical model (see the image below), an error occurs: Update failed for the Solution component in Eigenvalue Buckling. Error updating cell Solution in system Eigenvalue Buckling.

At the same time, this happens only after the end of the work in this file.

If you create a new file and work in it without closing it, then the program allows you to update the geometry and change it. Please tell me what this may be related to?

Also, the program does not show any errors in the Mechanical itself.

I am trying to do prestressed harmonic analysis.

for that, first I have used static analysis and solution of static analysis used in harmonic analysis

One silicon cylinder membrane clamped on edge and using trans126 I haver applied 400v (ramped). Static analysis works fine but in harmonic analysis I didn't get any plot.

Could anyone please help me?

I have attached workbench file.

Thanks in advance

Regards,

Dhruv

]]>Hello all;

As shown in the image attached I have created a hammer on Ansys mechanical and using the following link as a guideance "https://www.youtube.com/watch?v=e7JX8kTyPQw&ab_channel=CADtutorSYEDNADHEEM" to find total deformation, elactic strain and stress of the hammer.

However when I tried to simulate it the following error showed it shown in the image 'Solver pivot warning' and there is not enough constraints.

What might be causing this issue?

Any help would be appreciated cheers.

]]>I did a structural simulation and the solution is connected to another structural tree to export the deformed body into pmdb. Finally I opened in Geometry modeler and exported to x_t. But when I export, the parasolid file have only surfaces and lot of faces are missing as in the picture

Is there any solution for this? changing any setting will help?

Please help me in this issue.

Thanks in Advance

]]>What is toughness in material science?

]]>
but it just wont get meshed unless i gues linear method but if i do that, i wont get the results. idk what to do. please help

]]>I have a structure which has to be displaced and will form frictionless contact with another structure in the first step.

Once the first structure is positioned, I have to apply a force at certain location in the first structure which will slightly deform first as well as second structure.

I have applied displacement in the first step and force in the second. But it doesn't seem any force is applied on the structure and no deformation is visible.

Anyone please help me to tackle this problem.

Regards

Rakesh

]]>FORCE-DISTRIBUTED CONSTRAINTS DO NOT SATISFY COMPATIBILITY CONDITION

Though the force has converged. Can anyone tell me on which occasions this happen and how can I solve it?

Following the recommendations of running a 2d analysis with a single element (PLANE182), with the bottom nodes constrained in all directions and the nodes at the top with the cyclic loading in the Y direction, I still get strange results, for instance even though the strain in y-direction has the highest value the stress in the x-direction is the highest with a value of 0.2339E6 MPa. I also observed that the damage Df is extremely high (71) while it should be between zero and one.

I am attaching the Fortran code and the input file for anyone to check if there is an error.

Thanks in advance.

]]>Any help would be greatly appreciated,

thank you.

]]>I wanted to carry a transient structural analysis for a historic mosque using a 10-second scaled accelerogram. I transferred the model from Solidworks. I used SOLID187 as a finite element. For the same model, I also performed nonlinear static and modal analysis under gravitational loads. Although there was no problem in these two analyzes, I was able to calculate the stress and deformation values for the minaret only in the transient analysis. I was able to calculate very very small stress, strain values on the main body as if the main body was hardly ever affected by the acceleration. I could not evaluate as to what caused this situation. I should mention that the minaret is integrated with the main body and rises from inside the main body. Besides, in the model, the minaret was modeled as a separate solid body and the contact surface between the main body and minaret was defined as bonded contact.

I would be grateful for your help in this matter.

Best regards.

Sozen.

I applied the IC for HDSP in line 34, however after running the pressure I get is very small, I can't figure out why this is.

I have tried with the command D and that works but the pressure stays constant which is not what I want as I am applying external pressure to the object and HDSP should change.

The pressure I get for HDSP without IC is shown in the picture below.

What could be causing this ?

]]>I am trying to apply HSFLD242, I keep getting a warning saying there are some unidentified characters but I can't figure out where the problem is. I am not very experienced with APDL, I have followed the guide here: https://simutechgroup.com/contained-fluid-in-ansys-mechanical-workbench-fea-model-working-with-hsfld242-elements/

]]>What I was thinking was to export the normal elastic strain in the x and z-axis and find the magnitude. However, the geometry is still in the cartesian coordinates.

Is there a better way to go about this? Thanks for your help.

I have a very large model were I want to find out which is the best guidance for our slider.

You can see the interesting part of the model below

The parts are very big, but should also be able to calculate the stress normal to the surface so I choose SolidShell Elements.

the parts are bolted together, but I am not interested in the bolt connection so i made bonded contacts as you can see bellow:

As you can see bellow the middle plate step throug the outrer blade, allthoug i put on "true scale"

If i put on Auto scale(5,7):

And I am not sure if there is an error in my modell or if this is just an graphical error.

below you can see the initial informations of the contact:

If I look at the contact pressure on the front and backside of the middle plate I got following results:

**Can anyone please help me? Is this just an graphic error or did I something wrong?**

**Thank you very much and best regards,**

**bokaJ**

I am performing nonlinear analysis for structural steel frame and I am in doubt with auto time stepping. I need to obtain the yield strength and ultimate strength from the analysis. The step size or amount of substeps is not important.

I would appreciate any help! Thank you in advance!

]]>In one source I found information on determining elastic coefficients, but I'm not sure what to do exactly this way!

Also, ANSYS HELP says that the matrix must be positive definite and semmetric.

Also in ANSYS HELP says that the matrix can be either rigid or pliable.

How to determine the coefficients of elasticity for a rigid and flexible matrix?

]]>I have been working with ANSYS mechanical apdl for few months now and I'm modeling reinforced concrete beam with two predifined cracks. Beam length - 2,4 m, heigth - 0,244 m, width - 0,112 m. Reinforcement area - 3,2 cm². Beam has two supports, first constrained in y and x directions, second only in y direction. Beam loaded with two concentrated loads at 0,8 and 1,6 from beginning of the beam. (I attached beam scheme)

I chose 2D plane model and I'm using PLANE182 element type.

For concrete I chose cast iron material model, where I putted stress-strain relationship for compression and for tension. (attached stress-strain relationship diagrams)

For steel I chose multilinear isotropic hardening model. (attached diagram).

I modeled cracks by deleting specific number of elements (attached picture, crack heigth I get from analytical calculation).

For analysis options I chose small displacement static, 20 substeps with aytomatic time stepping, convergence criteria by default.

When I run nonlinear diagnostics, my calulation doesn't converge and I get problem in concrete tension zone, between cracks (attached Newton-Raphson resudual force diagram). in elements events, status of failure criteria in elements, it shows numbers in plastic strain.

What can I do to remove plastic strain limits or anything elso to help to converge solution? Thanks in advance.

https://www.dropbox.com/s/ok1d7162srocu5z/isolator%204.mechdat?dl=0

]]>Ux = Uy = Uz = 0 ;

Rx = Ry = Rz = free

If a solid model is used instead of a beam model, applying Ux = Uy = Uz = 0 at the end faces would also arrest rotational degrees of freedom on those faces and it would act as a fixed boundary condition.

So how can a simply supported condition be applied in the solid model?

]]>is it possible to assign radiation to both sided of the shell using Enclosure Type=Perfect? In GUI I can see only "Top" and "Bottom".

I have a problem in Ansys Workbench 2019R3 when I use the Export To Excel function for analisys results.

I get the error

Even if i click Yes, it does not work, the excel is empty.

I reinstalled Ansys, Excel but it did not help.

Any suggestions?

Thanks.

]]>I've watched a video tutorial about interference fit problem (see link below):

https://www.youtube.com/watch?v=5jH2Ox6-YkU

In this video tutorial force reactions probe both for the displacement boundary condition and for the contact region are inserted. It's talked that both of them shows how much force is needed to pull out the pin from the hole. Values of the force are slightly different. Could anyone explain the difference between both of them?

Thanks in advance!

]]>I have recently started to learn nonlinear analysis. I was trying to perform it in Ansys, but faced a problem that material kept behave linearly beyond yield point. Could anyone help me please, what do i do wrong?

Screenshots of the details of the analysis and the project itself are attached.

I'm currently modeling a fixed support circular plate under uniformly distributed load with a 0.381mm thickness. For a pressure of 0.005 psi, the maximum deflection is 0.1143 for my ANSYS results. However, when calculating analytically, the maximum deflection is 0.0625mm using this formula (w = pa^4/64D where D = Et^3/(12(1-v^2)) ). I used the same elastic constants. Can someone please help me.

The wbpz file is attached to the thread.

Bottom surface of the specimen is fixed and the load is applied to the top of the anchor rod.

Two reinforcement bars are provided transversely at a distance of 175mm each from the center of anchor rod. There are two nuts and washers at the bottom of the anchor rod.

Can someone please help me with the simulation?

My heartfelt gratitude for your assistance in advance.

Above

I am working on residual stress analysis of additively manufactured thermoplastic composite parts. I am using extrusion based additive manufacturing called screw extrusion additive manufacturing. In order to simulate residual stress i have to develop a path for heat and material input in Ansys. I have create code for that. Can please let me starting points or give a guidance to perform such a simulation.

I have intial idea that i have to use element death and birth. How can i devlope a element death and birth command for complex geometries.

Thank you in advance.

]]>I solve a problem with thin shells, with a static calculation I have no problems, when I connect large defomations, I have no solution convergence. How can convergence be improved or what could be the problem?

]]>I want to find out the stresses on the following structure:

The modell is foxed on the left side anbd on the right side there is a fore and a moment.

I am interested in the stresses of the yellwo one. Because the modell is very big, I want to look closer inside with a submodell.

So I connected it as you can see below:

For the imported cut boundary constraints I selected all faces which are in contact with other parts or at where I cut through my modell.

I also put in the bolt pretension on my sub modell, therefore I divided the pretension force through the cross section area of the bolt in the whole modell and then multiplied it with the new cross section area in the submodell.

Then I get following results:

I am not sure if this could be correct because there is something strange in the marked area.

So I also included an extra area for the cut boundary constraints as you ca see below:

But then the solution looks quite more wrong.

I am espacially interested in the marked areas bellow:

Can anyone help me please?

Best regards

bokaJ

]]>I'm trying to better understand connections in ANSYS Mechanical. Can someone point me to information explaining the difference between the contact and target bodies for connections? How to decide which body should be contact and which should be target?

Thank you.

Eric

]]>I had created belt drive mechanism (belt and pulley) assembly in solidworks, I had imported the model to ANSYS. I was looking for a way to vary the belt tension on the pulley and analyze the effect of the belt tension on the pulleys velocity and its health. Can this be done in ANSYS?

I am relatively new to ANSYS and hence I do not have much knowledge on the capability of ANSYS. Any help would be great. Thanks.

]]>I want to analyze a shaft system for coupled axial and torsional vibration. I know the masses and inertias as well as stiffness and damping coefficients. I understood how the model system for torsional vibration but the thing I couldn't understand is how can I define 2 combine 14 (one is for torsional and one is for axial) to one line?

]]>I'm studying a masonry arch made of brick and mortar. The contact between these two bodies is "frictional". Having reached a certain value of the applied forces, the solution does not converge (it is as if the collapse of the structure had been reached). My goal was, however, to plot the force-displacement curve, so, I assigned increasing displacements. In this case, however, the solution always converges and, consequently, through "Solution>Insert>Probe>Force reaction", I do not achieve my goal. What do you suggest you do?

Thanks in advance

]]>I am trying to perform an energy harvesting analysis on a structure with 4 piezolecetric patches. I am using ACT Piezo&MEMS Extension. However, I come up with two major errors.

1) I have defined 8 (4x2) voltage couplings for top and bottom surfaces of the patches. When I conduct harmonic analysis, I receive errors such as "**Node 2507 direction VOLT included in coupled sets 5 and 1**". What is the reason of this error? and how can I resolve this problem?

2) I suppressed 7 voltage couplings and kept just one coupling (bottom face of the piezo), and run the harmonic analysis. Now, the solver worked, but this time when I want to plot the voltage frequency response for the remaining piezo, I got this following error.

"**The user defined result might not be calculated successfully wholly or in some areas. There are some elements (or nodes) which do not contain data for the expression in: 133HARMONIC = VOLT**

**Note that the result data may not be contained in the result file or may not be applicable to some element types. Also note that the solver module can create elements, such as surface effect or interface elements, whose results cannot currently be scoped in a contour display.**"

If you help me about these problems, I will appreciate.

Thanks

]]>