Пікірлер

• 
  @VictoriaPorto-w1vКүн бұрын

  I followed your tutorial but when I submit the Job, the results that I am getting show that the kinetic energy is constant throughout which does not make sense. How can I fix this issue? What could be going wrong?

• 
  @praneethvarma918917 күн бұрын

  how you created interactions L2L, M2L you haven't specified that can you give some clarity on this please

• 
  @ZiemzyOGАй бұрын

  The interaction properties you describe are very difficult to follow. you change units in every video and you assume everyone knows where your previous videos are. wish you would just go through each interaction property and briefly explain how it changes between ply directions for better context compared to having to search every video in your channel. I still have not been able to find these properties /:

• 
  @ZiemzyOGАй бұрын

  I was thinking it would be possible to write out each step in your amplitude but theres no reasonable way to write out 1422 increments. Would have been nice if the there could have been a spreadsheet linked with only the velocity values in it.

• 
  @usmanayub9561Ай бұрын

  Hi I have followed all the steps but I am not getting force reaction on RP. My RF3 plot is a flat line on 0. I am getting values for RF1/RF2 and magnitude but nothing in 0 direction. What am I doing wrong?? Any leads???

• 
  @mohamedbenchikh14092 ай бұрын

  Hello is it possible to do transverse cracks with the same methode ?

• 
  @user-lc3wt7ks3t5 ай бұрын

  Hi Sanan. which one is better for modeling hydraulic fracturing in a geothermal reservoir CZM or XFEM ? Could this videos help me to model hydraulic fracture as regard you modeled it for a composite? i need to model a subsurface .

• 
  @alishah-mohammadi-azar14235 ай бұрын

  great

• 
  @user-eh2ek8rk8t7 ай бұрын

  Maybe someone faced my problem which I could solve it. I used data for amplitude in Load section and I finished everything but when I wanted to submit my job I faced the following error: "The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 1 instance COMP-0-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data." After searching, I used "assign stack direction" command in mesh section for each layer (before using this command you should click on "part" command on top of mesh section in object command and don't use assembly command ). after clicking on "assign stack direction" choose a part of a layer (for example we had 4 parts for each layer in this tutorial video) then click on the top surface of that part that is brown or near brown surfaces and do this step for each part of layer.

• 
  @scienceandtechnologybygaya35358 ай бұрын

  I am having a plate which made with steel and impact with rigid cylinder. And velocity is given in amplitude form. But I am not able to balance the energy. Kinetic energy is coming double than internal energy.

• 
  @bustanfatmawarsi891210 ай бұрын

  Thank you, sir, for this excellent explanation. Sir, I am currently working on modeling of 3D printed concrete elements, can I implement cohesive elements between the two printed layers, since there is not any epoxy or adhesive material between the consecutive layers (layers are directly stacked on each other), I've a doubt whether it is relevant to implement cohesive elements or direct surface to surface contact is enough. Kindly give your suggestion, sir.

• 
  @anshulbansod2192 Жыл бұрын

  SIr how can I contact you, I am pursuing a project related to FML and i would really appreciate your help with it

• 
  @jyotipatwal8842 Жыл бұрын

  hey, i am also working on similar Mtech project that deals with delamination . Please share your email so that I can contact you regarding some problems I am facing currently.

• 
  @shakir4429 Жыл бұрын

  Sir can you make a video on Dload subroutine for JKR contact model for adhesion. For sphere on plate

• 
  @pranaychalke74 Жыл бұрын

  Please help with property defining of L2L-0/0, L2L-90/90 and L2L-0/90

• 
  @HeIaI Жыл бұрын

  Thank You Dr. 👏

• 
  @rayahnasr7056 Жыл бұрын

  how can i repeat the drop?

• 
  @aligholizade73592 жыл бұрын

  Dear sanan, thanks alot for this useful video. I want to use 3d hashin for 3piont bending and model it according to your video. But when i run it, errors LNK2019 AND LNK1120 occurs. Can you help me to solve these errors. Thanks a lot

• 
  @muneerahmedmusthaqahamed48562 жыл бұрын

  Hello sanan bhai, I tried your tutorial it works for me, however the impactor is not penetrating in the composite laminates. Why?

• 
  @anuragchakraborty87662 жыл бұрын

  Very Good

• 
  @mahaelsaeid37132 жыл бұрын

  Hello Senan, i have a question , am not sure if i missed this , but why have we created diffrent parts for each ply/ layer? cannot we just create one part and distrubite it into several lazers and indicate the stacking sequance using composite layup and the number of layers ? and in case we used composite layup method ? how would we do the cohesive elements part ? thank you in advance

• 
  @SanaanKhan2 жыл бұрын

  Yes but then the delamination between the ply will not be possible. You need to select the ply surfaces to give delamination.

• 
  @mahaelsaeid37132 жыл бұрын

  @@SanaanKhan thank you for your quick responce, then am quite confused, in what cases then would the comosite layup method be usefull?

• 
  @mahaelsaeid37132 жыл бұрын

  @@SanaanKhan hello again, I have few more questions. I have constructed a simple tensile test model for my undefeated composite laminate, and I have calculated the reduced E11 ( from the stress starin curve along the fiber direction) However, I wanted to validate that my modelling approach was correct, so I thought of analytically calculating the general stiffness matrices (ABD) usinh a python code, and compare it with the general stiffness matrix of the abaqus model after extracting it. And now am confused, are these the right approach to validate that my simple abaqus model is correct? All I wanted to do was to check that my reduced E11 ( from the abaqus model ) is not so far from the value Calculated analytically. And also am not sure, if there is a way to extract the general stiffness matrix out of abaqus? Because I have tried a couple of methods I found on goolge but they didnot work. So my question is, if you can recommend a method for me to validate that my abaqus model , please do. And , if you can expalin to me more what are the values that I should validate against each other, will be great. Thank you in advance

• 
  @karangupta1202 жыл бұрын

  Thanks a lot for the nice explanation, also this method can not get the max. shear stress or shear stress values like Mohr circle or do we have to use the same formula (got from Mohr circle) to get it ?

• 
  @bengisucetinoglu56472 жыл бұрын

  Hi! i became the error about the Orientation. It is: The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 4800 instance KOMPO_-45-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data. What should i do? Thanks a lot.

• 
  @user-eh2ek8rk8t7 ай бұрын

  Maybe someone faced my problem which I could solve it. I used data for amplitude in Load section and I finished everything but when I wanted to submit my job I faced the following error: "The local-1 direction (after the additional rotation and permutation) of the material orientation, specified via *ORIENTATION, for element 1 instance COMP-0-1 is normal to the SHELL, MEMBRANE, GASKET, COHESIVE, or SURFACE element. The local 1-direction must be projected onto the element surface. Check input data." After searching, I used "assign stack direction" command in mesh section for each layer (before using this command you should click on "part" command on top of mesh section in object command and don't use assembly command ). after clicking on "assign stack direction" choose a part of a layer (for example we had 4 parts for each layer in this tutorial video) then click on the top surface of that part that is brown or near brown surfaces and do this step for each part of layer.

• 
  @forge912 жыл бұрын

  thanks a lot sir, this is very good and elaborate work, respect.

• 
  @UPENDRAKUMAR-kv2mc2 жыл бұрын

  Thanks sir for wonderful vedio, can you pls share the link of vedio where you have filled the data in property module about COMPOSITE, bcz you have not shown here how to fill damage evolution and all thanks

• 
  @niildiipchandraa52292 жыл бұрын

  Really helpful in understanding the basics and modelling a composite with cohesive layer

• 
  @haroontariq87362 жыл бұрын

  can you please send a copy of this file

• 
  @vikkyvikram32022 жыл бұрын

  hello sir, i am also working on impact on composites and writing VUMAT codes can you please help me ..can you share your mail ..i have some doubts.

• 
  @mertoozkaya2 жыл бұрын

  Sir your voice is so low

• 
  @arpitkaurav4092 жыл бұрын

  Sir can you please provide Time/amplitude files or can you give any reference journal so I can use those, as I am using with predefined field so getting wrong graph

• 
  @parthivchandrak2 жыл бұрын

  1) Anyone facing issues with velocity boundary conditions and lack of data for creating an amplitude, could resort to defining a "predefined field". It works fine! 2) Also I suggest using Analytical rigid instead of discrete rigid if the impactor could be modelled as an extruded/revolved shell. Analytical rigid gives more accurate results than discrete imo. 3) Take care of the mesh size as well. Check if its an element or node that is present at the impact point. Its highly sensitive to the results.

• 
  @allamaprabhuani5 ай бұрын

  😇

• 
  @ashutoshbangre8872 жыл бұрын

  Hello sir , This is Ashutosh Bangre I am working on cohesive zone modeling but the problem is it is not accepting hashin damage criterio . Please help me in this

• 
  @PRasheedaPHD2 жыл бұрын

  sir thank u for the video sir iam working on Impact for FML, after giving all the relavent data when i go for job.. iam not getting error but indentor is not in motion even though i have contact contraints and interaction between the layers

• 
  @honvovan41862 жыл бұрын

  good

• 
  @kumarprakash90492 жыл бұрын

  Plz sir make a new video on compression tesion and 3 point bending test for my types new learner

• 
  @PRasheedaPHD2 жыл бұрын

  sir for dynamic explicity also i used the same cohesive surface method , but after applying ,the shape of model is changing ,will u give any suggesion why its happeining like that

• 
  @piotrpodolak88592 жыл бұрын

  Dear SIr, I'm trying to prepare the model of multiple impact of the composite. The first strike goes well, however I have some issues while importing the output of first strike to second analysis. After submiting the analysis, on packager stage the following message (error) appears: Bad Material definition in element number XXXX instance XXXXXXXXXXXXXX: zero or negative initial dilatational modulus caused by bad material data. Please check your material input and any initial conditions if necessary. Is it caused by subroutine code, or inssuficient material data? I'd like to ask for your help in it. Kind regards

• 
  @veeturivarun52013 жыл бұрын

  Sir, How do I learn VUMAT?...and can you pls provide the material or souce for it?..

• 
  @SanaanKhan3 жыл бұрын

  The best way to do it by learning a basic FORTRAN operation and it's rule... Check out an algorithm from papers and try to implement it without damage. Abaqus provide some readymade subroutine that can be used to practice.

• 
  @sayedghalleby25223 жыл бұрын

  Is this work published???

• 
  @SanaanKhan3 жыл бұрын

  www.researchgate.net/profile/Sanan-Khan

• 
  @hcdeng12833 жыл бұрын

  Could you please tell me if geometrical nonlinearity is considered?

• 
  @SanaanKhan3 жыл бұрын

  No

• 
  @syakiraliff3 жыл бұрын

  sir can you do a tutorial how to make a coating layer on metal subtrate like tbc coating on metal

• 
  @sohailhamza28123 жыл бұрын

  Hi can we conduct repeated impact test in abaqus???

• 
  @SanaanKhan3 жыл бұрын

  Use multiple steps

• 
  @sohailhamza28123 жыл бұрын

  With multiple steps will the results add up, like will the beam fail after like 10or 15 steps??

• 
  @sohailhamza28123 жыл бұрын

  @@SanaanKhan sir if I do multiple steps say on a beam will the beam fail after 10 or 15 steps?? And do you provide project assistance privately by online classes?

• 
  @veeturivarun52013 жыл бұрын

  Sir..where did you call the subroutine for Hashin damage 3d?....after orthoElast routine?

• 
  @matteobruno58413 жыл бұрын

  Hi, I tried to model a low velocity impact with the same mesoscale approach you showed in the video but despite I adopted your same approach a compenetration of plies under the impactor occurs. Also very high values of ALLVD and ALLPW resulted...What could be the cause?

• 
  @SanaanKhan3 жыл бұрын

  Allvd hints you about the viscous dissipation energy. High value compared to internal energy ( more than 1 %) signifies large deformation and hence large value of stabilization to avoid element failure. Allpw is plastic work which is fine if you have large plastic deformation.

• 
  @trangkieu2303 жыл бұрын

  Hi Sanan, Could you please tell me the difference of geometric properties between L2L and M2L?

• 
  @sayedghalleby25223 жыл бұрын

  Sir can please tell me how to implement damage evolution equations

• 
  @sayedghalleby25223 жыл бұрын

  I have no element distorsion but mt probelm is related to the damage evolution

• 
  @sayedghalleby25223 жыл бұрын

  Thanks a lot sir I want to ask where is the block responsable for damage evolution

• 
  @sayedghalleby25223 жыл бұрын

  L2L 90/90

• 
  @sayedghalleby25223 жыл бұрын

  Hi sir i want to ask if the CZM is possible between to layers having same fibre orientation [90/90]????

• 
  @SanaanKhan3 жыл бұрын

  Although CZM is a mechanism and is definitely possible but the same fiber orientation will not show any Delamination

• 
  @sayedghalleby25223 жыл бұрын

  But in the experimental studies there is a delamination sir

• 
  @sayedghalleby25223 жыл бұрын

  And in your vedio kzread.info/dash/bejne/e4qZk9eoodDKhJs.html There is a proprety betwen layers 90/90

• 
  @sayedghalleby25223 жыл бұрын

  @@SanaanKhan sir in a previous vedio you mentioned a L2L 90/90 interaction proprety

• 
  @noorayaad25253 жыл бұрын

  Thank you for uploading this video.. Can I get the sheet excel in this video?... please I need the amplitude data...