ABAQUS Tutorial: Plain Concrete Cylinder under axial compression using concrete damage plasticity

[@hnrwagner]

The ABAQUS Inp-File can be downloaded here: github.com/hnrwagner/Concrete_Cylinder Support the channel by like, subscribe and citing of my papers ! scholar.google.de/citations?user=a4sKEKsAAAAJ&hl=en Timecodes: 0:00 - Intro 0:20 - Create Part 0:40 - Create Partitons 1:04 - Create Explicit Analysis 1:17 - Create Boundary Conditions 1:28 - Create Mesh 2:00 - Create Loading 3:57 - Define Material data 7:00 - Create Job 7:25 - Define Density 7:40 - Modify Mesh 7:55 - Modify Analysis Output 8:24 - Results without Status Variable 9:24 - Activate Status Variable 9:47 - Results with Status Variable 10:16 - Results for imperfect Cylinder

[@ammarahmed5725]

Hi sir, thanks for this work, but I want to ask you about selecting of time period and amlitude smooth step in dynamic explicit

[@amrmasoud5580]

Dear Dr CDP contains Tension damage and compressions damage , Please tell me how to dfeine and show the shear failure of concrete by CDP ? or it must be used the smeared cracking model?

[@Ronysiddiq1]

thankyou for your explanation. do you have any reference/video about modelling confined concrete using USDFLD subroutine?

[@victorokpanachi2304]

Thankyou sir, you are the best.

[@sumbulfatima3410]

Hello sir, can you please share the paper from which you have extracted data

[@ebrahimmaghami7752]

Thanks for sharing. How did you compute the compressive damage parameters? Because I see that you are giving it as an input, then it should be calculated by you, right? Further, consider that you want to apply tensile loading, then you need to give the tensile damage parameters as inputs again. How you would find it for concrete?

[@hnrwagner]

here is the video, for damage parameter calculation: kzbin.info/www/bejne/f6mco5ejqdWSnM0

[@hnrwagner]

here is the github link for the material data: github.com/hnrwagner/Concrete-ABAQUS-input-data

[@wameedhissa9018]

Valuable information, thank you so much

[@ahmedabouseeda4549]

thanks a lot, sir ............. what is your reference for the material data?

[@hnrwagner]

It thought out, cant name a reference

[@pokurilucky4862]

Great explanation sir. Could you please make a video about applying temperature strain.

[@朱瑾-i3f]

Why is the damage I produced different from yours? Mine starts with a parallel fracture from the middle, while yours is slanted

[@hnrwagner]

Different abaqus, pc, mesh, could be many reasons

[@ahmedfawzimohamedfarag6610]

when I edit the keywords, I get this error "Unknown keyword "concretefailure". The keyword may be misspelled, obsolete, or invalid"

[@hnrwagner]

Works only for abaqus 2019 and above

[@ahmedfawzimohamedfarag6610]

@@hnrwagner Do yo have a link to download ABAQUS 19 or 20?

[@hnrwagner]

@@ahmedfawzimohamedfarag6610 in order to use this keyword u neef abaqus 2019 or newer

[@akimech1]

Can any one plz respond what will be the damage evolution and stabilization criteria values in abaqus for HB26 material Will be greatful

[@bustanfatmawarsi8912]

Sir, can we see the damage by using dynamic implicit also?

[@hnrwagner]

As far as I know, no, works only with explicit

[@ozgun228]

Very good video and great explanation. Tolles Video! :). I am just curious how long did these analyses take on your computer? Did you try also with mass scaling and see any improvement on analysis time?

[@NaniNani-qx7dc]

isr i am using abaqus 6.14 sir iam getting error while pasting *Concrete Failure, TYPE=Strain 0,0.009917198,0,0.932955095 in edit keyword if if doesent add it and ran i am not getting the fracture could you please help to to get resolved

[@hnrwagner]

This keyword only works for abaqus 2019 and above

[@sohailhamza2812]

Hi sir, Is it possible to get stress & strain graph by input using values as compressive strength, density and elasticity??

[@hnrwagner]

should be possible but then you get only perfect plastic material behavior, which means constant stress after yielding.

[@bustanfatmawarsi8912]

Very useful👍...but Sir, I got an error (The keyword may be misspelled, obsolete, or invalid) while using the same code i.e. *Concrete Failure, Type= Strain (with whatever my dc and inelastic strain)...ur suggestions would b very helpful for me

[@hnrwagner]

have you tried the inp version: github.com/hnrwagner/Concrete_Cylinder this keyword works only for ABAQUS 2019+

[@bustanfatmawarsi8912]

@@hnrwagner I tried for RCC Stub column...with different material properties... everything is in a same manner like this video explains...but as u said tht keyword will work for abaqus 2019+...but mine version is Abaqus 2019 student edition...may b bcz of tht I got tht error...is thre any other method to see the cracking pattern in RCC...in the same version or any other like 6.13

[@hnrwagner]

@@bustanfatmawarsi8912 you could write a abaqus umat, otherwise you wont be able to see the cracks and element deletion. Or update to a newer abaqus version

[@bustanfatmawarsi8912]

@@hnrwagner ohk...thnks a lot Sir...for ur reply and suggestions...I'll do the same

[@hnrwagner]

@@bustanfatmawarsi8912 check out the input file of the concrete cylinder if this one works, your column should also work

[@ahmedsamir787]

thank you very much for your effort please, why did you define the steps as dynamic explicit and why did not define as static general?

[@hnrwagner]

Concrete Damage Plasticity only works for dynamic explicit

[@ahmedsamir787]

@@hnrwagner please sir, what true definition for concrete material in static general steps? because i see many videos use concrete damage plasticity in static general steps and i also and the result is good and also the literature review use static general for models

[@hnrwagner]

@@ahmedsamir787 for element deletion and concrete damage plasticity dynamic explicit is required, if you dont need element deletion you can also use static analysis

[@ahmedsamir787]

@@hnrwagner Ok Thank you so much,sir

[@sushilkunwar7239]

Can you make video explaining how concrete damage plasticity model works?

[@hnrwagner]

kzbin.info/www/bejne/hmPRgGukpKh6m7s

[@timosaksala4797]

It seems the failure band inclination is far too inclined compared to experiments

[@hnrwagner]

which experiments?

[@timosaksala4797]

@@hnrwagner Pretty much all of them. Look at van Mier's book on concrete fracture for example or this study:doi.org/10.1016/j.conbuildmat.2017.01.057. The inclined shear band failure mode, realized in the simulation, is mostly caused by the plate effect due to friction, while the usual failure model for all heterogeneous brittle materials in uniaxial compression is the axial splitting mode: conceptually, axial tensile cracks are first generated and then the sample fail due to catastophic loss of stabilty like a deck of cards. Abaqus damage-plasticity model is not able to replicate such failure mode but the inclined shear banding as realized in your simulation. Better results can be obtained if the concrete heterogeneity and the cement matrix-rocky aggregate mesostructure is included.

[@hnrwagner]

@@timosaksala4797 thanks for the detailed answer, I think the inclince failure mode is due to the longitudinal crack which i introduced in the second model at 10:39, the failure mode for the first model is different.

[@timosaksala4797]

@@hnrwagner Ok, thanks for the clarification, I think I missed that point.

[@kaycar06]

very good contribution, it will be possible for you to share your excel file, some contact number. thank you so much