Cyclic Loading - Unloading Analysis & Hysteresis Loop in material (FEA)

Подписаться 13 тыс.

Просмотров 28 тыс.

50% 1

In this video i discussed
1. Effect of plastic deformation on load - displacement plot, well known as Hysteresis loop.
2. Why we are getting this Hysteresis loop.
3. Points to be taken care.
4. Convergence issues, that one may face.
For simplification i considered cantilever beam with plastic material property.
For related questions & discussion you can contact me on 7891401376. or mail me gkn0504@gmail.com
Telegram Link - t.me/joinchat/...
Whatsapp Link1 - chat.whatsapp....
Whatsapp Link2 - chat.whatsapp....
FaceBook Group - / simtechknowladge

Опубликовано:

7 сен 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 115

@annoykumarghosh7463 23 дня назад

Thank you Professor, for such a wonderful video. It was a quite pleasant experience listening to you.

@mangeshjadhav9134 4 года назад

Great video.. Precisely explained 🙏

@simtech0598 4 года назад

Glad it was helpful!

@mohammedabdullah7134 4 года назад

You are amazing sir this is the my first time I see one doing this, it's highly appreciated thank you so much, one more request if you have time plz simulate reinforced concrete wall (shearwall) that is subjected to siesmic load,, God bless you

@simtech0598 4 года назад

Thanks for appreciation dear. I'll try to make video on it, if you have model, material details and experimental results.. let's share with me. gkn0504@gmail.com

@mohammedabdullah7134 4 года назад

@@simtech0598 thank you, I will email it to you now

@venkateshsripathi8107 Год назад

What is the career growth in this abacus ansys nastarn hypermesh

@simtech0598 Год назад

Dear, For mechanical/civil engineering now days CAE is necessary along with CAD. Don't look for career growth..learn in which you find fun and enjoy learning. Make yourself expert in something and keep learning. Career will automatically grow.

@zyadhaji9838 4 года назад

Thank you very much for this tutorial!

@simtech0598 4 года назад

Always welcome dear.

@majidhussain2350 4 года назад

Thank you so much for the video. I was searching for the explination regarding hysteresis loop. Please provide some more videos. And if possible please upload the video regarding the beam column. I know you have already uploaded that video but you haven't explained about the modules. And if possible make some videos about rcc beam

@simtech0598 4 года назад

Dear, You can have look on my channel SimTech05 for more videos. I not understood about what modules you are talking.

@rajeswarim3750 7 месяцев назад

Sir, i have applied cyclic loading in beam-column joint. Time increment of 0.1sec which starts from 0 to 18sec. Disp cycle is like 0, 1,0,-1,0 like that. How to get the exact displacement data in history output request.

@rajeswarim3750 7 месяцев назад

I have used dynamic implicit analysis, with x unit of time as 0.05 sec in history output request. In the resuIt, I get the value for 0.875mm not an 1mm. I have tried with t-0.01 sec, same thing happened. Kindly suggest the frequency option for getting results corresponding to exact displacement value.

@simtech0598 7 месяцев назад

Dear, There set output history request as evenly spaced time interval and set the value as per your requirement. For example you are running model for 10 sec and after each 0.05 sec you want output history plot. So number of interval will be 10/0.05 = 200 For exact displacement you need to check the time when 1mm displacement achieved. And you can use from time point option also.

@hellohai8720 2 года назад

Sir how to find initial stiffness and ultimate strength from hysterisis curve

@simtech0598 2 года назад

Dear, As it is Force vs dispatched plot so Initial stiffness can be find by slop of curve in linear zone. For ultimate strength you need to convert it into stress-strain curve.

@hellohai8720 2 года назад

@@simtech0598 thank you sir 💕

@humamsebai8604 3 года назад

EXCELLENT GOOD JOB

@haidermumtaz6065 3 года назад

I just have a question. Why have you used General static Procedure? If your load is changing or dynamic loading you should be using Dynamic Implicit Procedure? What is this hysteresis loop of? Is it of a material or a beam or of the boundary conditions?

@simtech0598 3 года назад

Dear, Repeating load not always dynamic load. It is common confusion among many engineering students and industrial people. This playlist will clear your doubts - Abaqus - Dynamic Analysis: ru-vid.com/group/PLdXwpuOm8L9p1mPx4EaOCSRYT3Unj-1ql This hysteresis loop is due to permanent deformation in material. And of course boundary conditions always play role.

@urachingchowdhury7151 3 года назад

Nicely explained. Could you please give me an idea of where to get those plastic parameters?. I have an experiment done that gives me the force values for the applied cyclic displacement. From there, I could find a single yield stress value at which permanent deformation happens. Not sure, what could be the other yield stresses and plastic strains values. Thanks!

@simtech0598 3 года назад

Dear, You need experiment not only gives yield point but also provide number of stress strain combination..that can be used for material calibration and plastic data extraction.

@lintapaul3108 Год назад

Sir I'm doing CFST column steel beam joint connected with bolted connection subjected to cyclic loading at beam end After running I'm not getting strength degradation portion in the result In property module, I have given elastic and plastic property with combined hardening Still I'm not getting strain softening region Please help.

@simtech0598 Год назад

Provide some visuals on mail or whatsapp... contact details available in video discription.

@user-jt9cf6hf5v 7 месяцев назад

Thank you very much❤❤❤

@midojanko8822 3 года назад

great job. I appreciate. can you explain the concept of the hysteretic moment -rotation curve, please? and how we can draw it in ABAQUS. like you have explained force vs displacement curve. thank you

@simtech0598 3 года назад

Dear, I'm not sure for the moment-rotation curve. But if experimentally it can be..then surely abaqus can do the job.

@amrmasoud5580 3 года назад

Dear Dr Thanks Please tell me : Can abaqus consider the PINCHING effect under Cyclic loading for concrete structures? if yes, please tell me HOW? I need tutorials? if yes, I ask if it considers the bond slippage between steel bras and concrete to can consider this effect?

@simtech0598 3 года назад

Dear, I'm not aware to such material model in abaqus. It may possible..but not in my knowledge.

@niteshshrestha6204 2 года назад

Sir, I tried for hysteresis plot of RCC frame with thin steel infill plate in ABAQUS with cycling loading. I got very higher values in hysteresis plot with kinematic hardening for steel. Can you kindly suggest any solution for this problem?

@simtech0598 2 года назад

Dear, With kinametic hardning rule Even you should get better results. Provide visuals.

@zaidanabbadi8745 4 года назад

Sir,Do you know how enter S-N curve data into Abaqus ?

@simtech0598 4 года назад

Dear, I never performed fatigue analysis in Abaqus. I suggest you to use FE safe instead of Abaqus.

@chandradeeproy6661 Год назад

Sir how to apply fatigue load here?

@simtech0598 Год назад

Dear, I suggest to use FEsafe for fatigue analysis. For that 1st run Abaqus model and call the odb file into the FEsafe. There you have all options to apply load type and load cycle..etc... Difect fatigue step is also available with Abaqus in...for low cycle fatigue problem...but I never used...as FE safe is the one of best tool.

@suryaprasanthmuddana7038 3 года назад

Can we do cyclic load analysis in buckle step and static riks ? Since Nlgeom is not activivating there, I got this doubt..plz confirm sir

@simtech0598 3 года назад

Dear, You cannot use riks for auch analysis. Instead use implicit dynamic.

@abelberhanemeskel1426 4 года назад

Why did you use Isotropic hardening model while modelling Cyclic loading? Most papers recommend that a nonlinear kinematic hardening model (combined isotropic + kinematic hardening) should be used to model cyclic loading.

@simtech0598 4 года назад

Dear, It was just an example to explain process, Not material. There should be kinematic harding with failure material data, no doubt. even better to go with user material.

@gurkanarc6833 3 года назад

Hi sir. thanks for this nice video. I have question that we expect pinching effects in this kind of cyclic loadings. so what should we do for getting pinching affect? maybe definition of hinges with nonlinear material options?

@simtech0598 3 года назад

Dear, Use kinematic hardning rule instead of isotropic hardning. Even you can use crystal plastisity for more cycles. Here just for example purpose isotropic hardning used.

@unurt9781 3 года назад

@SimTech05 If I do not have plastic material data how can I model in ansys Sir? Also where Can I find this plastic material data if I do not have? In case of using Bilinear isotropic hardening in ansys How can I assume strength degradation in plot of force displacement graph? Please can you explain them for us? Thank you so much Sir.

@simtech0598 3 года назад

Dear, Plastic material data is must for this type of analysis. You may use kinematic harding rule. I'm not aware to Ansys software and material models. Ao i cannot help in Ansys.

@mayankanand9390 2 года назад

hello sir, Thank you for this amazing simulation. I wanted to simulate the cyclic load for a underground storage cavern (storing compressed air). i need some guidance regarding the same.

@simtech0598 2 года назад

I believe i replied you on WhatsApp.

@hinata00793 3 года назад

From where or which paper has the steel properties been taken?? Could you please tell me that? Thank you!

@qurrainmir1457 4 года назад

Sir what type of interaction to create between a UHPFRC and Normal Concrete?

@simtech0598 4 года назад

Dear, Probably tie..but it may something else with different model.

@qurrainmir1457 4 года назад

Sir I have tried the tie model but the analysis takes very long time.. it gets stuck at some iterations and proceeds very slowly.. I have tried everything regarding that but it doesn't help. Kindly tell how can we simulate a perfect bond between two concrete interfaces?

@travelaroundtheworld2296 4 года назад

I'm really appreciated your modeling, Sir. Will you do video regarding the fiber reinforced polymer (FRP) under cyclic loading ?

@simtech0598 4 года назад

Dear, Main target of my channel is - explanation of concepts. That i did. Now whatever material, assembly you will consider the concept remain same. So do this simulation as per ur avilable data. If you stuck anywhere you can ask question.

@structurelearninghub3340 6 месяцев назад

why do you chose General static instead of dynamic implicit?

@simtech0598 6 месяцев назад

Dear, Bcz movement of end pont is constrained movements...which not generate any inertia effect. Hence no meaning of selecting dynamic step.

@structurelearninghub3340 6 месяцев назад

I understand that, but your loading is cyclic type..

@simtech0598 5 месяцев назад

You must understand.. cyclic load is not always dynamic load. Go through other videos of my channel, specially this one ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-iphIXNt4pRU.htmlsi=k9RypFb2oKqMllzd

@mohanbajaj8822 3 года назад

One more question sir. As you have told in the video that you will tell about why you have used interaction for coupling although you could place boundary condition directly. So can ypu please tell us the reason.

@simtech0598 3 года назад

Dear, Coupling is just to make sure load and constraints transfer to the whole face instead only one one node/point.

@mohanbajaj8822 3 года назад

@@simtech0598 thank you very much sir ♥️

@engineering789 6 месяцев назад

How to decide time step for each cycle of cyclic loading

@simtech0598 6 месяцев назад

Dear, Cylic load is always depends on application.

@engineering789 6 месяцев назад

@@simtech0598 Thankful for your reply, when I apply max displacement at each cycle 70,90,120mm then I am getting 65,80, 110 or less in force displacement what is the reason I didn't understand can you guide me in this regard

@enjel1239 Год назад

Sir how to creat embedded region in abaqus

@simtech0598 Год назад

Embedded conection are used for reinforcement type of problem..it avilable in connection manager.

@mohanbajaj8822 3 года назад

Thanks for such detailed description. Here is one question i want to ask regarding the time period in step (static, and dynamic implicit). Can you please explain what these time period means here. Will these be same for same assambly, if i am appliying a load in static step and then removing that load in dynamuc implicit step.

@simtech0598 3 года назад

Dear, Time nothing to do with individual component or assembly. May your question is not clear.

@mohanbajaj8822 3 года назад

@@simtech0598 Dear Sir, First of all thanks for ypur response. My question was regarding the Time period in dynamic implicit step. What it basically means. Is it related to complete one increment or to complete one step. And how we decide minimum increment.

@simtech0598 3 года назад

Dear, Time period is just period of any event/process. Increment time is small step taken by solver to converge solution. It depends on may parameters like contact, material, type of simulation, element, nonlinearity etc.

@mohanbajaj8822 3 года назад

@@simtech0598 thank you very much sir 🤗

@MrGabry83 2 года назад

how to see this diagram with strain-stress ?

@ompathak1694 4 года назад

Plz make video on 3D meshing

@simtech0598 4 года назад

Already uploaded. Plz check playlist in my channel.

@ramsesangulop.3621 4 года назад

How can I do this in ANSYS?

@simtech0598 4 года назад

Dear, The fundamentals remains same. Apply plastic material data Apply cyclic load/displacement Plot Reaction force - displacement. Only you need to know basic options of Ansys or any CAE software.

@unurt9781 3 года назад

@@simtech0598 If I do not have plastic material data how can I model in ansys Sir? Also where Can I find this plastic material data if I do not have? In case of using Bilinear isotropic hardening in ansys How can I assume strength degradation in plot of force displacement graph? Please can you explain them for us? Thank you so much Sir.

@mahinulislam7663 2 года назад

Sir, how can i get a pinching effect on the force vs displacement graph?

@simtech0598 2 года назад

Dear, As i know...you can't get it with available material models in library.

@rajeswarim3750 4 года назад

In experimental analysis, hysteretic loop are getting pinched in subsequent cycles. How to stimulate this in abaqus software

@simtech0598 4 года назад

Dear, Such simulation need material data that can consider pinching effect. In few work i found people used UMAT for that.

@rajeswarim3750 4 года назад

@@simtech0598 Dear sir, is it UMAT required for concrete and rebar material. I would like to model the rcc beam column joint for cyclic loading and the results should be realistic pinched hysteresis loop. How to do that sir.

@hedichen9956 4 года назад

Thanks for your video,sir.And I have some questions.Have you set the plastic limit? I don’t understand why the final reaction force drops?Is this metal component finally damaged?

@simtech0598 4 года назад

Dear only plastic material gives you hysteresis loop in loading and unloading. Reaction force drops little when material reaches to high plasticity zone...bcz at that time plasticity allow free movement in the component. If you provide damage criteria then only it will show you damage results. However, of you want to see fracture in component you need to run fracture analysis by XFEM.

@hedichen9956 4 года назад

@@simtech0598 Thanks a lot. Your suggestions are very useful to me. One more question, I wanna simulate the steel structure in a cyclic loading until the reaction force drops and the structure destroys. That can be achieved in ABAQUS/Standard? By the way, I have defined ductile damage and deletion element in the model.Thank you.

@simtech0598 4 года назад

Yes, you can. Make sure proper damage criteria as per your material.

@hedichen9956 4 года назад

SimTech05 Thank you. I try.

@haidermumtaz6065 3 года назад

Can I also get the hysteresis loop with the dynamic implicit method? I tried it myself but the field output for dynamic implicit is different than that of general static. Can you please make a video of getting moment rotation curve also ?

@simtech0598 3 года назад

Yes. You can plot hysteresis with GS, implicit, explicit step. Field and history output for general static and implicit step are same. Ultimately you need to plot force vs displacement.

@haidermumtaz6065 3 года назад

@@simtech0598 Which nodes shall I consider for the hysteresis loop? For example I have a cantilever beam with connection? Should it be the node on which I have applied the load and then calculate the displacement because of it? In your example you have just one support but I have two supports?

@simtech0598 3 года назад

Dear, Hysteresis plot always depends on region of interest...where exactly you want to see the deviation in displacement with respect to applied force. Generally we looka at region of maximum displacement. So choose point accordingly.

@raghu.r414 4 года назад

Sir what stress could I see ? Tresca or von mises? For plastic deformation

@simtech0598 4 года назад

Dear, By default all criteria of stresses are requested for output. U can see all of them.

@giftsonsamuel2627 4 года назад

sir, I have been modelling a reinforced concrete beam. I have conducted experiment -cyclic loading test for 2 million cycles and we have the plot for deflection with respect to no of cycles. same thing i have been trying to simulate in abaqus. Is it possible to run 2 million cycles using static general step? or should i use direct cyclic step? can u help me with this

@simtech0598 4 года назад

Dear, I don't think its easy computationally to perform analysis with 2 million cycle. You need huge storage and server level power.

@giftsonsamuel2627 4 года назад

@@simtech0598 sir, I don't need it to perform analysis for every cycle.i need just deflection at every 10,000th cycle.

@meetpatel-kt8cv 3 года назад

Sir, can you suggest which material model will be suitable for CDP for cyclic loading?

@simtech0598 3 года назад

Dear, CDP itself a material model.

@meetpatel-kt8cv 3 года назад

@@simtech0598 yes sir, but there are many researchers who gave different empirical equations like 'Hsu and hsu', 'whalthantri', 'popovics', 'Kent & park' etc. So my question was that among those models, which is most suitable?

@simtech0598 3 года назад

Dear, I'm not aware to such material model in abaqus !

@meetpatel-kt8cv 3 года назад

@@simtech0598 no problem sir. Thank you so much for your timely answers😊