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could you please make a video on deformation and fracture mechanism of particle reinforced metal matrix composite with ductile damage model
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: kzread.info/dash/bejne/gWp6r5SGl7jNgdY.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: kzread.info/dash/bejne/gJt4z6iTnNi_ctY.html To purchase each of them, you can send email to us: [email protected]
At 10:40 you confused angular frequency with circular frequency. You should insert 2 cycles/second instead of 628 !!
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.
Hmmmm, I would say - check dat and msg files first! Don't start to play with setting, until you check and fix warnings. There are keys there
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: kzread.info/dash/bejne/Y4h8t6ubo5DKeto.html kzread.info/dash/bejne/f5-pppOJfZebp9o.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.
Hello, I hope you are doing well. I am currently engaged in a school project that centers on predicting the bonding process, such as welding, between two coaxial cylinders. These cylinders undergo a heat treatment and are subjected to axial pressure, which improves their contact and ultimately results in adhesion.
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.
can we use Johnson-cook plasticity model in sequentially coupled thermomechanical analysis for DED simulations. if yes, how?
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 dear teacher, How to find the stiffness matrix of an FE model done in Abaqus ?
Hi. As far as I know, you must write keyword to get that. But I have not done it before.
Hi dear teacher . Congratulations for this tutorial. May I ask you that , what is bound of time that you used in Explicit analysis . For example x to y time. Please answer with numeric time
Hi. Thank you. I didn't use explicit analysis in this tutorial. The step is Static General.
Sir, in a paper it states that"We normalized time along with the normalization of thermal conductivity with its reciprocal in order to bring down the computational cost of simulations. The obtained solution using normalized time was again converted back to normal time accordingly" my question is that how can i normalize time in a proper way for my analysis? My analysis time 36000 sec. Im using dynamic explicit.
Hi. To give you a reasonable answer, that paper must be reviewed. Please send it to us via email: [email protected]
Sir,i gave u that paper
Could you please define the Load section more precisely also isn't it an extra step to define 3 steps and also amplitude in Load Module?
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 engineer. Good time How can I have the full simulation movie?? Do you have auxetic simulation training? Is this video and training available on the FEMEX website?
Hi. To have the full version of this tutorial, you can send email to us or send message via Telegram or WhatsApp. Our email: [email protected] 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.
When using ALE, I already use C3D8R but this error shows "Adaptive meshing is not supported for elements used with the hyper or viscohyper material model when enhanced hourglass control is used." How can i fix?
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
How are you getting plastic material models? Design codes?
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.
can we apply load in terms of incremental displacement ?
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.
How can i buy chapter 15 ?
Hi. Please send message to me on Telegram or WhatsApp. My number is: (+98)9351324013
*promo sm*
Can you please write in English?
why do my contour integral objects contain regions that cannot be mapped into layers of node sets?
Hi. Please send an email to me to resolve that issue. My email: [email protected]
@@FemexIran I've already emailed you
@@AdiraFitriaPutri-tt7uz Thank you. Yes I received it.
Since heat flux is varying wrt time, Von Mises Stress should also vary. But looks like it is constant in your case. In static,general step , what is 'static' showing in case of stress analysis?
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 i want your help in my project Please give me your telegram id
Sir I have a question about how to define damage in hard & tough plastic (polymer), I use ductile damage model, but the stress strain curve after yield point goes with softening regime,steady flow regime then hardening regime. Right now i am following the damage evolution in abaqus to find the "fracture strain" in hard & tough plastic, but i am still confusing with Equivalent fracture strain at damage initiation, Is Equivalent fracture strain at damage initiation in hard & tough plastic equal the plastic stain after" yield point" ot after "steady flow". Thanks a lot, i appreciate it
Hi. To have deep understanding about ductile damage definition, you can buy this premium tutorial: kzread.info/dash/bejne/doOmu8aFfqyyips.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: [email protected] WhatsApp number: (+98) 9351324013
Sir what 6 boundary conditions have you applied in the model?
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: [email protected] WhatsApp number: (+98)9351324013 We have some extra payment methods for some of the countries to facilitate the payment for our customers.
How do I buy Package 2 for €30,i cant find the link
Hi. Please send an email to me: [email protected]
I received your email.
How did you draw it
Hi. which part do you mean?
Thanks for this video training!
Hi. You are welcome.
How to get full course ??
Hi. Please send message to me via email or Telegram or WhatsApp. My phone number: (+98) 9351324013 My email: [email protected]
HI sir I am trying to simulate a structure composed of two materials, where the first material has a higher thermal expansion coefficient than the other. As the temperature increases, the structure should bend. The only material properties I have are Young's modulus, Poisson's ratio, and thermal expansion coefficient. I've set up a static general analysis and applied a predefined field for temperature. After submitting the job, I obtained the desired results. Now, what I aim to do is to automatically increase the temperature from 20°C to 90°C in a single job (if possible), and then plot the maximum displacement as a function of temperature. How can I achieve this?
This video saved me from the hell. Thank you
Hi. I am so glad to hear this. You are welcome.
Thanks for free tutorial . Perhaps if Google meet is not dangerous, pressure vessel meshing explanation will be better! But also every thing is very good
You are welcome.
داداش پس ما ایرانی ها که به آموزش فارسی نیاز داریم چی کار کنیم ؟؟..
سلام. آموزش تحلیل کمانش و پس کمانش تو سایت فارسیمون موجود هست: femex.ir/tutorials/abaqus-post-buckling/
Please upload the post-buckling part.
Hi. Good day. The post-buckling analysis is completely explained in Chapter 10 of Abaqus Comprehensive Package. Here is its preview: kzread.info/dash/bejne/aGmn1paOe6zMprA.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.
why my j integral contour is not converge as contour number increase
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: kzread.info/dash/bejne/k22l0ZVmkaeem8Y.html
Hi Amir, I have a question, I have stress-strain curve of an adhesive, the profile is a triangular. I multiplied the strain with thickness of the cohesive element to get stress-Vs-displacement curve. Now, when I take the area of the triangle, my number comes to as 2 N/mm. But my Abaqus does not run; the error is "CRITICAL FRACTURE ENERGY IS SMALLER THAN THE ELASTIC ENERGY PRIOR TO DAMAGE INITIATION" ... When I try to lower the number to 0.5 N/mm (just by trial-&-error), the files runs for some time (I see erosion of cohesive element, but still doesn't run thru completion..... do you know what could be wrong ??? Please help
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.
Hello can you write VUSDFLD in abaqus for dynamic FGM thermomechanically loaded cylinder?
Hi. Yes I can. I have received your email. I will answer it.
Sir can you make tutorial of cutting tool simulation, which include cutting temperature and cutting forces
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: [email protected]
can you sir make tutorial for hyperelastic compressible material , i need to buy this tuorial
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: [email protected]
I have doubt pls give your email
thank you sir for this intersting video, can you please shearing this presentation ppt sir
Hi. You are welcome. Unfortunately we do not share the presentation files of our free tutorials. Sorry for that.
sir, how to plot residual stress of this example ?
Hi. You can define a path and plot the residual stress field along the path. You must use a frame for after the process.
Thanks for your tutorial. I have a question regarding the concept of a rigid body and couple constraint. How do these constraints distribute a concentrated moment on the surface? Is it uniformly or linearly? I am also curious why the results are so different.
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.
Very nice tutorial . Thanks for your teaching
Hi. You are welcome.
Sir how to do block shear of angle section with bolted connection with real fracture?? I am doing angle section analysis of 100*75*8 mm section with plate attached to 75 section. I am applied a tensile load at plate and fixed section. But I am unable to get failure..I dont know why? I have done this in my UTM machine but unable to do in abaqus please help me.😢
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: [email protected]
thank you so mush
You are welcome.
barikala baes eftekhar hastid ostad
Thank you so much.
I found it very helpful. Thank you
You are welcome.
Thank you Amir Hossein for the Webinar, I found it very useful.
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: kzread.info/dash/bejne/i2iprdKgoKvQl84.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: kzread.info/dash/bejne/k22l0ZVmkaeem8Y.html To buy the tutorial, please text me in WhatsApp or Telegram: (+98)9351324013
If I want to conduct thermal analysis of mass concrete to get the thermal gradient due to cement hydration process and then input these data into mechanical analysis to get the stress field output, what is/are the recommended method(s) of analysis? and what the govern equation of heat flux will be ? Thanks in advance 🤗
Hi. Unfortunately I don't have experience in that field.
Awesome presentation, thank you!
Thank you for making this nice presentation !
You are welcome.
Very effective and valuable tutorial for modelling the welding and metal additive manufacturing processes!
Thank you for making this detailed tutorial.
The way of using Abaqus documentation is very critical for users that really helps to improve yourself, thank you for sharing this video.