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Hi. You are welcome. As the NLGEOM has been set to off, the stiffness matrix will not change through out the simulation. But if the NLGEOM was activated, the stiffness was changing in each increment. I set it to off to do a linear analysis to compare my results with analytical result as it is based on linear assumption.

@@abe3qyli637 You are welcome.

Thank you so much.

Hi. Thank you. You can define General Contact to account for the edge to edge contact in Abaqus/Standard or Abaqus/Explicit.

@@FemexIran sure will try and come back to you sir.

Hi. You are welcome. Yes the mesh size is very important in this simulation. If you want to get similar result, you must use the same element size.

@@FemexIran oh, alright! when i perform the analysis, the body is getting deformed in a way that the quarter-circular partition where the pressure is applied is getting deformed, how can i fix that? thanks for the help!

@@avneeshdalvi Unfortunately I don't know whether it is because of your mistake or it is natural. When the result is not according to your expectation, all of the settings of your model must be checked. You can use our online consultancy service in this regard. To ask for online consultancy, you can send email to us: mirzabozorg71@gmail.com

Hi. There is no difference between the usage of Ductile Damage model in the topic you mentioned and what is explained in this tutorial. I mean the premium version of it. Every thing is the same and only the appearance has changed. In the topic you mentioned, there is also another damage mechanism which is the delamination between the particles and matrix. To account for the failure mode, Cohesive Surface can be defined. We have also a comprehensive tutorial for this failure mode: ua-cam.com/video/O6FM2MgUgQs/v-deo.html Also we have a tutorial for the damage analysis of RVE based on the combination of XFEM and CZM. Here is the link to its preview: ua-cam.com/video/NgDmFZluYBs/v-deo.html To purchase each of them, you can send email to us: mirzabozorg71@gmail.com

@@FemexIran Thank you, could you please upload complete video of RVE based....tutorial.

@@Ravi-ld5br Unfortunately at present we don't have any tutorials for what you asked for.

Hi. Please check the Abaqus documentation. There is a section in Abaqus documentation for explaining amplitude. In that section it is mentioned that: omega=2*pi*f Abaqus uses omega for periodic amplitude based on Fourier series. In our problem f=100Hz so omega=2*3.14*100=628 rad/s All of our tutorials are based on Abaqus documentation and even we have a tutorial for how to use it.

@@FemexIran sorry, but when you insert the amplitude, clearly says circular frequency. Circular frequency is different to angular frequency. Is the amplitude input window wrong? Please see your video at 10:40 and you will see that the input window clearly says circular frequency. If this is wrong, it should be good to report this mistake to Simulia. It is not my intention to disturb you. As a matter of fact I think your videos are good. But here there are a problem. Thanks.

@@mariogalindoq Your problem is that you do not read the Abaqus documentation. Please read this section in the Abaqus documentation version 6.14 which is available in Google: Abaqus Analysis User's Guide>Prescribed Conditions>Overview>Amplitude Curves The formula is written clearly with an example about periodic amplitude which T=0.2s so f=5Hz and finally omega=10*pi=31.4 rad/s I hope you can finally understand.

@@FemexIran you are right! Abaqus refers the angular frequency as circular frequency. I think this is a mistake in Abaqus because in the literature normally circular frequency is in cycles/second and angular frequency is in radians/second. Thank you for your patience.

@@mariogalindoq You are welcome. Unfortunately there are a lot of bugs and mistakes in Abaqus and they make working with Abaqus even harder. Our tutorials are based on Abaqus documentation and we are sure about every thing we mention in our tutorials because Abaqus consultancy and tutoring are our main jobs not like the others who create tutorials just for fun with lots of mistakes and mislead their viewers.

Hi. Most of the Abaqus warnings do not affect the solution and they are only for caution. Having or not having warnings do not guarantee your solution at all. There are much more powerful tools and indicators for finding the convergence issues like job diagnostics tool. Actually resolving convergence issues in a nonlinear FEA can be much more complex that you can imagine. We have two other free tutorials about how to interpret the warnings. here are the links to them: ua-cam.com/video/1THUIbs-dJw/v-deo.html ua-cam.com/video/MkuD1PM45ww/v-deo.html

@FemexIran 1. Max number of increments exceeded. 2. Force/moment equilibrium is not achieved 3. Excessive distortion of elements 4. Excessive rotation in dof at the point And so on. From my point of view this is really not too bad idea to look in output files to check what is going on in simulation. I used to work w/o graphical interface, so both mentioned above files are key for problem solving and debugging.

@@user-jw7ki8gv8r I have seen a lot of cases that the analysis was completed even with the mentioned warnings. Because of this I say that resolving them does not guarantee the completion or not completion of the analysis. This is because of the complexity of nonlinear FEA and I do not use the warnings as my main tool to resolve the error.

Hi. Thank you. Ok. Please continue. What are your issues in this regard ?

@@FemexIran Thanks for your response. Normally, my issue lies in the contact, when I apply temperature and radial pressure on both cylinders to improve the grip so they stick together. The heat does not transfer between the cylinders and the results do not converge. So, based on this data temperature and pressure, I want to predict this chart.

@@oussamanaitbourhim4988 Unfortunately I don't have experience in such process and don't know how to resolve that issue.

Hi. What is the DED process ? Please explain about it to give you accurate answer about your question.

@@FemexIran sorry. DED is a laser based additive manufacturing process and it is simulated by sequentially or fully coupled thermo mechanical analysis.

@@ritmanik1 You are welcome. Yes generally you can use the JC model both in semi-coupled and fully-coupled simulations. But as far as I remember, the Abaqus JC model is not good when the temperature is equal or greater than the melting temperature. This is due to its formulation in Abaqus. So the UHARD subroutine must be used to write it in a way that even after the melting temperature, it works.

@@FemexIran Thank you for the reply sir. I will get back to you after trying for the same

@@ritmanik1 You are welcome.

Hi. As far as I know, you must write keyword to get that. But I have not done it before.

Hi. Thank you. I didn't use explicit analysis in this tutorial. The step is Static General.

Hi. To give you a reasonable answer, that paper must be reviewed. Please send it to us via email: mirzabozorg71@gmail.com

Sir,i gave u that paper

Hi. The step by step explanations are provided in the extended premium package of this tutorial. Their description is mentioned below the video. You can buy package 1 or 2 to have the step by step tutorial and all of your relevant questions will be answered.

Hi. To have the full version of this tutorial, you can send email to us or send message via Telegram or WhatsApp. Our email: mirzabozorg71@gmail.com Our number: (+98) 9351324013 This is an English tutorial. English tutorials are not uploaded on our Persian website. To buy them you must contact us according to what mentioned above.

Hi. According to the error description, it seems that you have defined and used hyper or visco-hyper material with enhanced hourglass control. According to my experience, ALE must not be used with hyper-elastic or hyper-visco-elastic materials as it gives unrealistic deformations. To resolve that error, you must remove ALE from your model or change the hourglass control from enhanced to another setting in the mesh module.

@@FemexIran yeah i use hyperfoam, ohhh so I can't use ALE. Thank you so much for helping 🙏

@@Jaldot You are welcome

Hi. The plastic model is mentioned in the second reference paper. Also it is a conventional plastic model which is the same as what is mentioned in the ASME. The nominal stress vs nominal strain curves are mentioned in the second reference paper. They are used for data calibration and finally entered into Abaqus.

Hi. Yes I have done the same.

@@FemexIran is displacement applied to the periphery of the hole?

@@SubhamPrasad-rf1hq Yes. It is. The displacement is applied to the RP at the center of each hole and the perimeter of each hole is coupled to its relevant RP at its center.

Hi. Please send message to me on Telegram or WhatsApp. My number is: (+98)9351324013

Can you please write in English?

Hi. Please send an email to me to resolve that issue. My email: mirzabozorg71@gmail.com

@@FemexIran I've already emailed you

@@AdiraFitriaPutri-tt7uz Thank you. Yes I received it.

Hi. Yes you are right. Its because I only defined the yield stress and I didn't define hardening because it was not written in the paper. So the material behaves in a perfect plastic manner and when it is in the plastic region, the stress will not change and remains equal to yield stress. If we define hardening, it behaves according to your expectation.

Hi. To have deep understanding about ductile damage definition, you can buy this premium tutorial: ua-cam.com/video/DOrYdLNILZ8/v-deo.html The prices are mentioned in the description below the tutorial. Or you can use our online consultancy service. For each of them you can contact me via email or WhatsApp. Email: mirzabozorg71@gmail.com WhatsApp number: (+98) 9351324013

Hi. Boundary conditions applied to the workpiece are mentioned in the slides. But boundary conditions applied to the tip are not explained in the slides. To know about them you can buy the extended premium package of this tutorial mentioned at the end of the video. also its price and what is included is mentioned in the description below the video. If you want to buy it or have any questions about the premium package, please send email to me or text me in WhatsApp. Email: Mirzabozorg71@gmail.com WhatsApp number: (+98)9351324013 We have some extra payment methods for some of the countries to facilitate the payment for our customers.

Hi. Please send an email to me: mirzabozorg71@gmail.com

I received your email.

Hi. which part do you mean?

Hi. You are welcome.

Hi. Please send message to me via email or Telegram or WhatsApp. My phone number: (+98) 9351324013 My email: mirzabozorg71@gmail.com

Hi. I am so glad to hear this. You are welcome.

You are welcome.

سلام. آموزش تحلیل کمانش و پس کمانش تو سایت فارسیمون موجود هست: femex.ir/tutorials/abaqus-post-buckling/

Hi. Good day. The post-buckling analysis is completely explained in Chapter 10 of Abaqus Comprehensive Package. Here is its preview: ua-cam.com/video/65st4UKIfvM/v-deo.html The price is mentioned in the description below the video. We have 50% discount on all premium tutorials until 12th of March so you should pay half of the price mentioned in that description. The cost must be paid by PayPal. If you are from India and do not have a PayPal account, I can ask my other Indian students to help us. You send the money in rupee to them and they send it to me via their PayPal account.

Hi. Good day. There can be several reasons: 1) The size of each contour is not appropriate. The focused mesh must include the plastic region entirely. 2) The singularity settings are not correct. 3) You have not generated the focused spider-web mesh pattern appropriately. You can buy the extended premium package of this tutorial to learn how to do the contour integral analysis appropriately. Also you can use the discount code to buy it with 50%discount. This is the link to the discount code explanation: ua-cam.com/video/a9qo3-aD8kc/v-deo.html

Hi. The error says "The fracture energy is smaller than the elastic energy." I think it means that you must increase it from 2 not decrease it to 0.5 . I am saying this according to the physical meaning of the error. What stops the simulation? What error? Are you modeling in 2D or 3D?

@@FemexIran Thank you for replying Dr. Amir. All my components are 3D Solid elements, mostly C3D8 and some C3D6 elements. I recalculated the energy, it is coming around 2.6 N/mm, and it seems to be working now. Thank you, sooooo much for your help.

@@mono7891 You are welcome.

Hi. Yes I can. I have received your email. I will answer it.

Hi. I am familiar with cutting simulation and have experience in this field. I have done both mechanical and coupled thermo-mechanical simulations. But unfortunately, creating a tutorial about this process is not in the scope of our work. If you have issues in conducting your simulation, you can use our online tutoring and consultancy services. You can contact me via email: mirzabozorg71@gmail.com

Hi. Yes I will create a tutorial for hyper elastic materials in the future but it is not in the scope of our work for the close future. Hence, maybe you should find another Abaqus tutoring channel or you can use our online tutoring and consultancy services. For using such services, you can send an email to me: mirzabozorg71@gmail.com

Hi. You are welcome. Unfortunately we do not share the presentation files of our free tutorials. Sorry for that.

Hi. You can define a path and plot the residual stress field along the path. You must use a frame for after the process.

Hi. You are welcome. Happy new year. For applying a concentrated moment to a surface or section, I always define coupling constraint but I have also seen some tutorials which use rigid body constraint. I have not used rigid body constraint at all but I know that using coupling constraint is totally correct and it works. When you define a coupling constraint, it means that the initial distance between the RP and nodes of the selected surface will not change during the simulation. So the distribution of moment will be in way to satisfy this condition.

Hi. You are welcome.

Hi. You can use our online tutoring and consultancy services to get the answer of your questions and modify your model to reach the desired results. To use our consultancy services, please send an email to me: mirzabozorg71@gmail.com

You are welcome.

Thank you so much.

You are welcome.

Hi. You are welcome. Thank you.

@@FemexIran Hello sir, How can i choose the value of time period in step in Dynamic Explicit ?

@@structurelearninghub3340 Hi. It depends on the problem and whether it is dynamic or static or quasi static and some other things. We have a premium tutorial for. Here is its link: ua-cam.com/video/Y4uKpgpHjgk/v-deo.html The price of its full package is 25 EUR but until 12th of March we have a 50% discount so the price will be 12.5 EUR. Here is the link to the discount code: ua-cam.com/video/a9qo3-aD8kc/v-deo.html To buy the tutorial, please text me in WhatsApp or Telegram: (+98)9351324013

Hi. Unfortunately I don't have experience in that field.