ANSYS 15 Tutorial - Frictional Contact & Bolt Pretension

ANSYS Tutorial - Nonlinear Frictional Contact & Pretension of Bracket Assembly in Workbench 15. This tutorial explains how to use connections, contacts (frictional and bonded contacts), as well as the bolt pretension tool. It shows how to apply two load steps as well as investigate the results using the contact tool.
This tutorial also gives a short explanation on Multizone, hex dominant, mapped face meshing, as well as face sizing mesh controls.
This is for beginners starting in ANSYS.
For more information please leave your comments below!
GEOMETRY FILE DOWNLOAD (.agdb) : cutt.ly/DrDaly...

[@taneliheikkila8276]

Thank you buddy! Much better videos than those CAE worldwide videos that are so darn boring.

[@drdalyo]

+Taneli Heikkilä Haha ya there hard to watch. Thanks!

[@andreashansen8520]

+ 1

[@JoshZagorski]

This is the best generic Ansys tutorial I've seen

[@drdalyo]

Thanks!

[@winnaveen7197]

@@drdalyo I have commented you Mr.DrDalyo regarding bolt pretension that to change the direction, I hope you are gonna sought this.

[@iftekharrousseau493]

great video, please keep uploading more videos on Ansys workbench!!!

[@drdalyo]

Thanks!

[@farmerandy76023]

Great video. Much better than $$ training I've taken from ANSYS channel partner.

[@imanmaroef4465]

Excellent tutorial, smoothly show examples of crucial know hows in performing efficient FEA computation. A tutorial on the character of various contacts and their control, especially when plasticity occurs at contacts would be very appreciated.

[@aabhamishra9921]

I would take time to appreciate the way you taught. A must watch video for the ones, who wishes to learn the Static Structural Analysis using Ansys, but can't find it easy to do. This video, takes you through all the basic concepts required for the Analysis and that too without over exaggeration, and by the end of the video, you realise that you have understood it and ready to go!!! Thank you so much Sir. Keep up the good work. 🔥🙏

[@y.s.gurubasavaraya5549]

Very good video tutorial on contact. Please post more tutorials on various examples, stress concentration, dynamic analysis

[@kapoljawale5994]

Thank you so much Dr.DalyO!! this helps a lot, thank you for the thoughtfulness to provide the models as well.

[@drdalyo]

Thanks!

[@adshah20]

The guy is a legend

[@drdalyo]

Thanks haha!

[@harshalpanchal883]

thanks for the video. it helped me for solving bolted assembly problems in Ansys.

[@yuxiao4963]

Best ANSYS tutorial video ever!!! really appreciate!!!

[@drdalyo]

Thanks!

[@CharanSingh-wp2yi]

Very useful video brother thank you now I studying in Glasgow Caledonian University and course work depends only on ansys

[@ussabne]

I am grateful for the video. It helped me a lot.

[@eduardoengelhardt1353]

Amazing tutorial man! Thanks. You really master Ansys Mechanical. At 10:41, maybe if you add the displacement on both sides you get something closer to 0.3 mm. (Idk if you were already considering it)

[@vikramraoklvicky2862]

Beautiful video

[@cesarhdzipn]

Simple, fun and super useful, thanks for sharing, you have one new follower

[@aymanhagfarh3890]

Thank you very much, it was so helpful

[@drdalyo]

Glad it helped!

[@santiagogaborovmilich7887]

Thanks for the tutorial. It helped me a lot! If you can explain why you chose a symmetric behavior for the contacts would be great. Thanks again for sharing this

[@drdalyo]

+Santi GM Hey no problem! To keep it simple, symmetric behavior gives lower penetration however it is more computationally expensive. It also provides contact results on both surfaces of the geometry.

[@jaevulen]

great video! very easy to understand for a noob like me

[@luissilvestrevacaoyola2021]

Thank you so much man! It has been very useful for my work!

[@drdalyo]

Welcome!

[@МаксВетер-х8ш]

Thank you so much for helpful tutorial!

[@drdalyo]

Welcome!

[@seanx.c7453]

@@drdalyo Hi DrDalyO, can you please make a tutorial on modeling in Design Modeler? Specifically, how do you create multiple bodies/parts and make sure that they are at the correct location?

[@edoardomorelli8883]

You are a PRO

[@stefaniamagnettigisolo5775]

Thank you for the video, very well explained!!!

[@drdalyo]

Glad it was helpful!

[@mohammadsajid9414]

Excellent presentation, Thank you

[@drdalyo]

Glad you enjoyed it!

[@yusufpolat13]

most clear explanation by the way.

[@SoccerJustforFunlive]

Thank you so much .... ! u explained amazing... i looking forward to see your other tutorial

[@drdalyo]

Thanks!

[@angelaswanmiddleton349]

Great video! Thanks so much.

[@mariokar985]

Thank you for this video, it has been very helpful!

[@drdalyo]

Welcome!

[@MrHeojun]

thanks for the video you helped my project really much

[@drdalyo]

Thanks for watching!

[@mangeshdeshmukh2140]

Nice Tutorial, Keep on sharing.. Cheers!!

[@LucasAlmeida-ny4ux]

Thanks for the video!! I'm learning a lot! Please, could you post more examples using Bolts pretension...?

[@masselindqvist]

Excellent presentation, thanks...

[@krishj8011]

Nice... Very useful

[@freemansg70]

thanks a lot for videos, quite helpful!

[@drdalyo]

Welcome!

[@afsalmuhammed4442]

very usefull video expalin many things very quickly

[@ucphamanh12]

Thank you so much for your tutorial video, this also guide me some suggestion in my work. But I still in my trouble. I have some case for static analysis. If there are 3 components. First, element 1 make element 2 deformation, then element 2 to contact with element 3 and transfer moment. All contact is frictional. I try some option in contact, but program didn't give me any suitable results

[@Ramakantmumbai]

Very nicely explained. thank you very much.

[@israelbravo1388]

Thanks a lot for this video!!!

[@drdalyo]

Welcome!

[@kiranravindranath10728]

Great tutorial...Can I use the same concept for my model, which has an adhesive joint and a screwed joint, to check if the adhesive gives away as I tighten the screws? Also I would love to see how the reliability (time related failures) of a model can be simulated using ANSYS. Eg., If I were to simulate environmental Stress Cracking by putting the part in a humid oven, after how long the weakest member is going to crack. Good job!

[@anecitosilvano2166]

Great. Thanks once again.

[@mayviv20]

Excellent tutorial

[@kaankkaraman]

i saw first time a native english guy teaching some ansys stuff

[@maverickzed4930]

Hi Doc, could you please go ahead and post a video on how to change the position of pretension on the bolt? Also, I'd really love to know what the symmetry/asymmetry in the contact area means, tnx by the way, the tutorials help alot. ;)

[@yousefimani]

Good job man, thank you so much.

[@annazhao7688]

Very helpful tutorial! Could you make some video tutorial for Ansys Icepak? Thanks!

[@victorliu5665]

Excellent tutorial!!!!

[@drdalyo]

+Liu Victor thank you!

[@victorliu5665]

Do you have a tutorial regarding how to see the load distribution after apply a force/pressure on a surface or how force reacting each other among different components? At ansys When we apply a force to a surface, the load is even distributed I assume? Can we apply uneven distributed load to a surface at Ansys? Thank you very much in advance.

[@drdalyo]

Here is a tutorial where I use a varying load: kzbin.info/www/bejne/o3K9fHqEmKl3rNU To see shear and moment results, you would need to use beam elements, and use the beam results tool. You can also see reaction force results if you change the scoping method

[@varaprasad7105]

Nice tutorial. Suggest some tips in ansys workbench.

[@obviousoranges982]

VERY well demonstrated.

[@saquibrazakhan7412]

Thank You Very Much for DOWNLOAD LINK :)

[@sachinsalunke3076]

hey #DrDalyO , Thanks for sharing knowledgeable videos for us, Please add videos for Transient, spectrum and random analysis. Thanks in advance!!

[@sezeryavuz4716]

Thank you so much, this was so helpful :)

[@drdalyo]

+Sezer Yavuz thank you for watching!

[@omerdogan85234]

excellent tutorial, could u please make tutorial about how to overcome convergence issues in multibody analysis, how to read the solver output, time, force criterion plots, thanks

[@Naveen_Anan]

Very nice videos!!! I have the following questions: 1. Let's say that you have some deform-able bodies and you need to connect through Rigids, How to we do that in ANSYS? 2. Is there any option to transfer the loads, say force or pressure on a surface through a contact surface without physically connecting it or is there any equivalent options. 3. can we plot shear force/ Bending moment diagrams on a 3D models; as in your 1st video on 3D beam.

[@drdalyo]

+Naveen Anan you can change the option from deformable to rigid in the Geometry branch in the outline for each body. Yes there is something called Connections to create contact. Moment and shear diagrams are for beam elements only, not for general 3D elements

[@phanikumarsimhadri8124]

Thank you for your video, let me know what is the difference between von Mises stress, contact stress and frictional stress

[@designX404]

waoh....whats a nice educative video.Please make a video on Transient thermal please please Thank you

[@speedbird7587]

wonderful!

[@drdalyo]

Thanks!

[@saikumars2285]

Thank you for your videos....very helpful to me Sir, How can I apply prestress to a slab

[@phitrantruong3125]

hey man, how can i explain my thank to you? it's so meaningful for me (a self-learner) --- thanks million...

[@chopstix011]

excellent video

[@mahaboobmohammad7572]

excellent and very informative video

[@drdalyo]

+mahaboob mohamad thank you!

[@Made_by_profs]

We give adjustment and we don't give forces So we speak about deformations( if this bolt displaced 0.3mm due to applied force ) . Did i get true ?

[@user-lc3jw2zi3u]

Thanks alot . you are my jesus!!

[@drdalyo]

Welcome!

[@gigih76]

Great video man!

[@zahradashtizadeh5961]

Please teach more complicated geometries

[@chaminirodrigo2676]

Hi DrDalyO, This is indeed a very helpful video. Thank you very much. But when I applied bolt pretension it was not centered and my results are different from yours. How can I make the bolt pretension centered?

[@drdalyo]

Hi! Are you sure you selected the cylindrical surface for the pretension? Maybe double check your geometry to make sure there are no mistakes.

[@chaminirodrigo2676]

DrDalyO yeah I selected the cylindrical surface and still the pretension appears on the aide of the bolt

[@alpha754293]

+DrDalyO Thank you for this video. I am learning a LOT VERY quickly, so these videos are DEFINITELY helpful/useful. I did have one question though - you had mentioned that you can create a coordinate system and change the bolt pretension cross-section location. Can you please create and upload a video showing us how to do that. That would be greatly appreciated. Thank you.

[@tonyn300]

In general, how do we know what friction coefficient to use, especially if it’s thread on thread.

[@hernanmariani5174]

great video!! thank you so much!! can you do a tutorial about thread contact? with that function available with ansys 15 and latest?

[@kashifnaseem220]

Hello, thanks alot for this tutorial. I have just one question, for bolt pretension, you went for adjustmet but didn't explain what does it mean? like if i go for Load, does that mean torque applied on bolt, while we are fastening it?

[@winnaveen7197]

Hello DrDalyo could you please tell me how to change the bolt pretension direction to another direction. I really want to know it.

[@basmaal-ghali9174]

i have a screw inserted into a bone, how to show the stress distribution in each part (nothing appeared in my results, just the colored force values)? also, the screw penetrated about 2mm inside the bone! how to prevent penetration? i used normal lagrange but the output results were wrong

[@NagrajThadurAnArtist]

Excellent!

[@drdalyo]

+Nagraj Thadur thanks for watching!

[@reicht4]

@6:15 4 manual created contacts, @10:05 you got 3. I think it was too non-lineer :)

[@刘胜杰]

Great video.i am now doing the simulation about the bolt thread .i got some information about it from the ANSYS mechanical .but i cant understand it .could you do a video about it .THANKS

[@drdalyo]

+刘胜杰 There is actually a new function in ansys 16 i think that can do bolt threads for you (meaning you dont need to model the actual threads) maybe check that out. If not I could look into doing a tutorial on it. Its a good topic. Thanks for watching! please subscribe

[@刘胜杰]

+DrDalyO THANK YOU VERY MUCH

[@Joventino1]

Great Tutorial! I have a problem of a beam supported on a concrete floor. This beam has no inertia to distribuit the nodal force equally along its lenght, and I want to know which area of the concrete floor that is supporting the load. How can I model it? Can you make a tutorial video regard this subject? Thanks.

[@Pumka_games]

Greetings! Thanks you very much for your videos! It's all really helpfull. How do you think to make tutorial about construction made from beams and using the beam-element (line-body , i guess) to analize it? Or using different kind of elements in different cases and how to change it in WB. I think, it's the base knowledge and it will be really helpfull, espetially for beginners.

[@drdalyo]

+skullheaddd1 I could add a tutorial like that to my list. I was thinking of doing a truss example which contains line bodies. In geometry modeler you could just draw lines, and apply a section to the line and create a line body. Video to come.

[@Pumka_games]

+DrDalyO The truss example would be just what is needed. "In geometry modeler you could just draw lines" - but how can I do the same thing when imporing geometry from SolidWorks, for example? How can I convert solid bodies was modelled in SW to line-bodies in WB?

[@ud4458]

Great video! I am applying frictional contact, however loading perpendicular to the friction (bending). Can there be friction and keep the body fixed ?

[@mrc9946]

Thanks for your tutorial they are really useful! Mesh question: Some guys (in DM) use in to divide model (slice material) in “regular” bodies and form with them a new part, in order to obtain a more regular mesh. For example consider our bolt and slice it in one minor diameter cylinder and one greater diameter cylinder: or our “C” bracket as a part made of 3 “body” plate. What do you think about it? it makes sense or maybe it is and old habit who comes by older or different program? Corner and edge question: Some guys use to delete fillet radius from model in order to obtain more regular mesh (like above) and reduce computational

[@shanfanluo3810]

slice is often used for the complicated model, mostly we just care about the high stress location, so sometimes we simplify the model to reduce the calculation time

[@yusufpolat13]

why solution is a nonlinear when we use the frictional contact? why there is an iteration? in cfd the guessed initial values of the parameters are iterated i understand that but at this point why do we need to make an iteration ? if someone explain me i will be very appripriote. thx.

[@muddassirrazzaq7822]

Make a video on gear and contact between teeth of them

[@PavanKalyanKota]

Dude, this file is not opening. It shows "Unsupported version of AGDB version. This file has been created by later version of Design Modeler; it cannot be read". Currently I'm working on 14.5 Workbench.. Btw, your videos are worth watching.

[@drdalyo]

+Pavan Kalyan Kota you need version 15 or later to open the file.

[@ufukbilgin9694]

I like your tutorials. Please keep on sharing. I can give you some struggling problems. And I have a question about this video, Can you explain the reason why you choose Contact Behaviour as Symmetric? What if I choose "program controlled"? Thank you so much.

[@drdalyo]

+Ufuk Bilgin program controlled will choose the best default method, it wont affect the results in this case. you can do some research on this in the help. (ex. symmetric vs asymmetric), basically symmetric will show you results on both surfaces on the contact, and asymmetric will only show on one surface. asymmetric is usually less solve time.

[@ufukbilgin9694]

ok really thanks:)

[@sanjeevgupta1076]

I follow step by step, but at last when I click to solve then I get error message that One or more bodies may be under constrained and experiencing rigid body motion. What should I do.?

[@tejasmetkar9483]

Yes i had same problem

[@gujexp25]

What type of contact should i use if one plate is grouted in foundation and second plate is bolted to the grouted plate. Second plate is a footing of a frame. Bolt is torqued. Could you please explain what contacts and boundary conditions should be applied? Thanks

[@muramullasaipradeep4591]

It pretty good explaining but little too faster while selecting commands and proportions plz do it slowly because we r learners ...👍

[@sanjaykumaryadav3186]

Thanks

[@francescodallevedove5018]

Very nice video, I have a question though: what if I need to evaluate the life? On the model I want to set some bolt pretensions and some external loads. Only the external loads should determine the cyclic load, while bolt pretensions should be a constant. How can I set this in the fatigue tool? Or maybe this is automatically done by the software? Thank you in advance

[@drdalyo]

Please do some reading on the fatigue tool and how it is used in Ansys

[@sravs4lavs]

Hi this is Sravan I like this tutorial. I am a beginner in Ansys work bench. Can u please do a tutorial with one side bolted n the other side loading.

[@drdalyo]

+Sravankumar Nerella I think it should be very similar to this example. Maybe start by importing the model and using the techniques i showed regarding contact with yours and see where you go. Let me know!

[@nirmal148]

how to apply proper hex dominant mesh in stepped tapered shafts??

[@2008uitm]

Thank you very much Dr.Dalyo. Very helpful tutorials. I wanna ask you I am modelling wall using masonry bricks and I want to add Interface connection (e.g INTER193 : 2-D 6-Node) between the faces of the brick. I don't want to use the automatic contact provided by the Ansys. If you have the command code I will be very thankful

[@clarababy6872]

Hi, I just wanted to ask why you didn't switch on gravitational load? I see that without it coeff of friction doesn't affect the model at all. It's kindof totally confusing at the moment for me. Looking forward to hearing your idea about this

[@drdalyo]

Coeff of friction should not have anything to do with gravitational load. If the friction is not working, you should investigate the contact not gravitational load.

[@clarababy6872]

@@drdalyo ok thank you. It was a frictional contact, which was defines as you described here. Anyway will chk this up

[@smartchits20]

can you suggest how to prestress a tendons of a beam

[@faz321]

Could you show how we can assign steel fibres into concrete properties to analyze how the fibre itself can effectively increase the shear resistance

[@drdalyo]

+Fahad AlZahrani that will be in an upcoming video.

[@dr.zuhairkadhimjahanger1103]

Dear Dr. Dalyo,Very nice tutorial as many as you have done.How could I download the CAD file?Thanks

[@drdalyo]

for now I have not posted the cad files, maybe in the future I will post them.

[@Pralin_Leo_Messi]

how to change direction in bolt pretension

[@drdalyo]

Dont think its possible..

[@gibgratti3312]

Good video

[@markovrca6721]

Force in bolt after adding external load should be lower than pretension force....

[@JessicaSNSDZzzz]

Thank you for your videos sir, i'm really appreciated. Do you have any ansys video that is related to SMA(Shape Memory Alloy) properties or not? i'm so curious of how to apply these property in ansys.

[@Sheaker]

Dear DrDalyO. At 8:44 You said very important thing about location of pretension cut. I have long bolt with pretty high pretension and I am getting large step in deformation of my bolt. Could You possibly provide any solution to get rid of this unrealistic deformation? Thank You for sharing knowledge.

[@SUNILKUMAR-bw4ov]

Please let me know how to apply simple support to the half circular sold model, I faced this problem when I go to tool test, please kindly share how to apply simple support boundary conditions