#36 ABAQUS Tutorial - CDP Model Input Generator

[@fkratlatif495]

Thanks Dr. Ahmed For these informative lectures, your efforts are valuable.

[@sridarshanhs5223]

Dear Ahmed Elkady, your tutorials are very useful. I have recommended your tutorials to my friends and research scholars. I have one request, please make a tutorial on brick masonry. Thanking you

[@amanyirevictor8035]

Your series of lectures on Abaqus have really been helpful. Thank you Sir.

[@syfy_the.mechanic]

Dr Ahmed Elkady Thank You Very Much for your Work. I'll be following you on LinkedIn.

[@aemueed]

Dear Ahmed Thank you so much for such beautiful explanation. I am not just talking about this video, the whole lecture series by you is excellent, informative, understandable and beautifully explained.

[@Abraham_lin]

Amazing! In China mainland to use for this type of software ,we usually need to pay for it. its too ridiculous. thanks for your generous.its a great channel.

[@AElkady]

If you experience issues running the tool, try the following: 1) Make sure you have the latest update from GitHub. 2) Make sure windows languge is set to English. 3) Run the program "as admistrator".

[@mhamayun445]

Hello Sir, its not downloading due to security firewall, i disable it but still facing same issue

[@mahmoudabdalhak6989]

Your Tutorials are awesome, thank you alot

[@d.9695]

Thank you very much! this is a great tool and a huge help for the community :)

[@thecitizen9747]

Hello Sir i am one of ur biggest followers and admirer, we really appreciate what your are doing, i have been looking for a complete formation on abaqus for years but have never came accross a series of tutorial like yours. Your are doing great job. Thanks for that. However, i would like you to do new series on prestressed concrete and prestressed steel structures also if possible, there is no much tutorials on prestressing.

[@khajakamalfayazahmed839]

Dear Dr. Ahmed, thanks for such amazing video. I am working on to include the dynamic increase factor in the CDP model. How can we include it in abaqus?

[@zhenyuqi6444]

Absolutely amazing program. Thanks heaps!

[@abdallarselbana3394]

This is outstanding thank you very much for sharing

[@haoyangbai5562]

Hi, Dear Ahmed Elkady, thx for your turorial. Could you make another video about using concrete smeared cracking model.

[@alialireza2394]

Hi guys . When I want to install there is an error. Call the download server failed (http error code 404)

[@farzanehabedini5723]

Thank you for your great video

[@hatefsardari6899]

Dear Dr. Ahmad Thanks for your very useful training programs. If possible, provide training to create a biaxial failure ( yield ) by kupfer and lee ... Thanks

[@khalilal-bukhaiti8386]

Appreciate your good work👏👏

[@Mohammedr555]

Really , thank you for your great efforts 🥰🥰🥰

[@magedqasem7403]

Appreciate your great work

[@karishmaNazimi]

Hello dear Dr. Ahmed. Thank you for your wonderful explanation in your learning videos. My question is that if we want to use the CDM for masonry can we apply the same method?

[@AElkady]

Yes, individual brick material behaviour can be represented using the CDP model. This of course does not include the brick-to-brick interface.

[@eyobdadebo5031]

Thank you Dr. Ahmed Elkady for your nice presentation in your video! All your videos are vanguard. I wonna to ask you that you are not included error on ABAQUS after submission of job! for example how we can fix if the errors say " Too many attempts made for this increment". in your video of pre-tensioning when i did as you did, it say like this one. how we fix it? Thank you!

[@sayedzakria]

Dear, Dr. Ahmed thank you for efforts, I have question how can i input (test data) for my materials because i use different codes .

[@胡川-f2q]

I have the same problem

[@engr.moatazgamal1595]

Hello,Dr.Ahmed ..the uploaded file deleted from site please resend it again ,many thanks for you

[@manalwael370]

Good morning dr.ahmed I was wondering if you could help me with these warnings please, For two-dimensional models, if a non-unity thickness is specified for two-dimensional solid elements and these elements are involved in an interaction such as contact, the same thickness should be specified for the out-of-plane thickness of the corresponding surface under *surface interaction. For *tie pair (assembly__pickedsurf7-assembly__pickedsurf6), adjusted nodes with very small adjustments were not printed. Specify *preprint,model=yes for complete printout. I am working on an RC beam-column joint

[@user-NicolasJeff]

Thank you for your great work！🤨

[@helpingwithprojects5251]

Sir please proved the reffrence for this equations please..pleaae i want to use the generated data for my mtech project

[@benmeloukaabdelkader737]

assalamou alaikoum, thank you very much.

[@anahitanorouzi7564]

Dear Dr. Elkady, I want to express my gratitude for your invaluable work. I've been attempting to simulate a cementous material using the CDP model with the assistance of your Input Generator. However, I encountered an error message while using your input generators. Could you kindly provide clarification on the units of input data modes? Additionally, I'm curious to know if your input generator is capable of modeling the CDP model with a maximum compression of 0.59 MPa and a maximum tension of 0.05? Thank you for your time and expertise.

[@AElkady]

The units are indicated in the tool interface (MPa and mm). If you observe a bug for material with low fcu, please raise an issue on Github and I will try to address it asap.

[@geethuelsathomas8048]

thank you, the video is really informative, this can be used only for concrete material, can you suggest to me some ideas to generate a curve for mortar material.

[@ZaidKherbek-gw3ml]

Thank you very much

[@jinnamtan8040]

Hello Sir, may i ask why is my Abaqus Job- Data Check is showing "DURING THE CONVERSION FROM CRUSHING TO PLASTIC STRAIN Abaqus FOUND NEGATIVE AND/OR DECREASING VALUES OF PLASTIC STRAIN FOR MATERIAL CONCRETE CDP. VERIFY THAT THE DEGRADATION DATA UNDER *CONCRETE COMPRESSION DAMAGE IS CORRECT" when i input the values from the CDP generator for job analysis, and may i ask how should i solve this?

[@AElkady]

please check this video for information: kzbin.info/www/bejne/raqbZYt9ltKhack

[@shaikreshma6125]

Sir... Can you upload videos regarding masonry column with detailing modelling..

[@moneefmusa348]

hello, DR.Ahmed is this tool has the ability to create a consecutive model for UHPC (Ultra-High-Performance Concrete )?thanks in advance

[@kajananselvaranjan5989]

Great vedio! Is that possible to do a video on meso scale modelling like aggregates creation and mortar for heat transfer analysis in concrete? It will very useful

[@abhaygujar5450]

Sir thank you. I have certain doubts though Fcu is fck+8? Is fcu reported compressive strength of block or cylinder? Characteristic length of element .. accommodated in compression descending branch branch? Thank you

[@谷哥-q9z]

Hello, teacher. I'd like to ask you some questions. For CDP, if the cyclic load of concrete is in the elastic stage, how to consider the concrete damage and how to make the concrete achieve plastic failure? thank you

[@hellohai8720]

Sir please make a video for cyclic performance of corrugated steel plate shear wall with beam only connected infill plates

[@azrykhairil2551]

Can you make penetrate simulation on plate? Thank you

[@MHDR21]

Excuse me, how can we generate data for concrete with a compressive strength of more than 100 MPa ?

[@ibmsharaky]

Please can you send the program that generates the concrete data

[@nadimmardini4973]

Thank you Dr. Ahmed for the beneficial and clear tutorials! The CDP Model Input Generator worked perfectly with me but then an error popup saying "Unrecognized function or variable ´ctfroot´. Error in --> runtimeInitializationChecks.m at line 23". Please I would like to know how could we solve this problem to run the tool again. Thank you!

[@AElkady]

Make sure you download and install the latest Matlab runtime

[@ahmedaahmeda9219]

Is this program generate the parameters for concrete when exposed to a fire ?

[@mohamadmasri9583]

Dear Ahmed, when i take the values generated from this tool, should i convert it to inelastic strain? or can i paste it in the Abaqus table directly?

[@AElkady]

You can use the generated values directly as input in Abaqus

[@noobbotrelpubg3764]

Sir, can you upload or provide video or pdf related to simulation of composite steel concrete structure. It will be very helpful for me😊

[@irfanali-tg1dm]

Hello Dr. Ahmed .... I want to thank you for this fantastic informative video regarding CDP. Can you please guide regarding calibration? How to calibrate CDP using Abaqus? My model behavior doesn't match with material behavior?

[@AElkady]

Please be aware that the CDP model (and any material model that involves stress softening) is mesh-dependadnt. Therefore the response will change with the mesh size. You will need to calibrate the mesh size for a given material CDP definition.

[@irfanali-tg1dm]

Noted...Thank you Dr. Ahmed. If you have time please make a video on how to calibrate the CDP model. @@AElkady

[@irfanali-tg1dm]

Dr. Ahmed when I assigned all properties of the CDP model on projectile penetration on the concrete portion. The Mises stress (average) and strain (average) behave live stress-strain of steel and not behave like stress-strain curve of assigned concrete materials. So, what will be the possible region? @@AElkady

[@ijazalirasikh]

Can we have input valves in FPS system? like inches, psi, ksi etc. please guide sir or anyone.

[@xXx-bv7zw]

Hi thank you for your videos. They are very helpfull!!! i have one question. Is this tool only for concrete cylinder or can i use it also for concrete cube ?

[@daifukumochi3686]

Thank you sir but how can I know the mesh element characteristic value?

[@AElkady]

The characteristic length depends on the element geometry and formulation: it is a typical length of a line across an element for a first-order element; it is half of the same typical length for a second-order element.

[@АндрейДовыденко-м7и]

Hello. Thank you for your program. Please tell me why they can't create txt files?

[@AElkady]

try 1) running the program as adminstrator or 2) download and install the updated installer. The issue will be fixed.

[@safdarnaveedamini4535]

Dear Dr Elkady, After downloading, it says the tool version is expired. Can you provide us with the new release, Please?

[@AElkady]

Make sure windows languge is set to English

[@钟伟-n5w]

Hi professor Ahmed Elkady,i download the file from the link you put,but as i download finished,i click the button of CDP tool,it say the tool has expired ,you can find a release in Github,but what i download is the latest,what am i supposed to do ?please do me a favor ,thank you

[@AElkady]

Make sure windows languge is set to English

[@engineerianislam6831]

I have a big problem with abaqus model I want show the problem on you and give me advice to solve that problem,please

[@Mohammedr555]

Dr. ahmed elkady we are waiting for new model by Abaqus please if you have enough time thank you

[@KGM16]

It's great to have such an amazing tool for CDP model in ABAQUS. I would like to ask you one thing about damage calculations, which formula did you use for damage calculation in Chinese code? Thanks!

[@一昂的菲特]

GB50010-2010(The 2015 revision)，There are specific parameter value methods in the interpretation of the provisions of the specification

[@abdallahodeibat6040]

dear Ahmed I appreciate that effort but I want to ask fcu is equivalent to fck, fck cube, or fcm according to Eurocode?

[@AElkady]

fcu is equivelant to the compressive strength based on a cylinder test.

[@abdallahodeibat6040]

@@AElkady Eurocode defines fck as Characteristic cylinder compressive strength and fcm as Mean cylinder compressive strength both are strength based on a cylinder test but I don't know which one is equivalent to Fcu

[@ZahraZobydii]

Big thanks I am a master student and i am having some troubles . I am wondering if i can contact you

[@mario123abc]

Dear Ahmed Elkady. Your videos are A+++, I send a lot to my phd students. But promoting tutorials with tensile stress vs strain with softening, with no regularization is a HUGE mistake. The journals are rejecting a lot of papers, due to researchers now trying to do this. This problem is known since 1983 by BAZANT, using stress vs displacement instead. Please don t contribute for this "scientific confusion". “Crack Band Theory for Concrete, Materials and Structures 16: 155-177, 1983” “Non-local Smeared Cracking Model for Concrete Fracture in the Journal of Structural Engineering 1987” In any case great videos Best Regards

[@AElkady]

i'm glad you found the tutorials useful. The limitations associated with modeling tensile softenening using strain rather than cracking displacement are actually highlighted in another tutorials. While the latter option is generally recommended, the former is still usable under certian conditions. In any case, the choice and proper implenetation of a given modeling option relies entirely on the user who clearly must be familiar with the relvant litrature, the underlying theory and the potential consequences of the modeling choice.

[@RBTVThought]

thanks

[@salarb.4604]

👌👌👌

[@kangliu6665]

DURING THE CONVERSION FROM CRUSHING TOPLASTIC STRAIN Abaqus FOUND NEGATIVE AND/OR DECREASING VALUES OF PLASTIC STRAINFOR MATERIAL MATERIAL-CONCRETE. VERIFY THAT THE DEGRADATION DATA UNDER *CONCRETECOMPRESSION DAMAGE IS CORRECT. there is a error when using the data from the generator (Chinese code C40)

[@khalilal-bukhaiti8386]

Dr. Ahmed, hope you reply to my email 🙏🙏