Hi, very interesting and useful video! I think it's possible the error occurring with hashin outputs can be related to the use of the three-dimensional engineering constant material model. The abaqus embedded hashin model is 2D model while the material you adopted has properties in the third direction. To check this, you can try to solve the model by adopting 2D lamina properties instead of eng. constant with hashin criteria and see the error disappear. You can also usa eng. constant and set a different material damage criteria like Max stress damage with BK evolution. To implement a three dimensional hashin criterion in abaqus you need to code a VUMAT subroutine.
@FEADith3 жыл бұрын
will try that thanks.
@matteobruno58413 жыл бұрын
@@FEADith let me know!
@911Ares3 жыл бұрын
Hello, this video is really helpful but I want to read your paper on, from which you get the mat properties, can you please add a link in the description?
@im_anand3 жыл бұрын
Thank you So much... I could make this
@FEADith3 жыл бұрын
You are so welcome!
@RidgeRiderPorta3 жыл бұрын
Great work! Thanks for sharing. I have one question: How fast is the impact and how can I change the speed?
@FEADith3 жыл бұрын
in this case i indent -10 mm during step period of 1 second... if you wanna change the speed... just change the time period in the step... for example 0.01 second.. in this case, the speed will be 1000 mm/s..
@RidgeRiderPorta3 жыл бұрын
@@FEADith Thanks for the quick answer! I have another question: Why do you give the impact a displacement? How is this relevant in practice? Shouldn't the impactor be given a speed and then lose energy from the impact and then stop? If a displacement is given, then the energy of the impactor must increase during the impact to achieve the displacement!
@FEADith3 жыл бұрын
@@RidgeRiderPorta nice comment Luca.. this does not really impact test.. it is called quasi-static indentation.. so you control the displacement and indent it. but you are right.. in low-velocity impact test, you set the initial velocity and mass of impactor.. and it impacts the plate and the impactor lose energy due to energy absorption in the plate. but all processes are the same, just the way you give loading conditions. instead of using prescribed displacement, use initial velocity.
@kuldeepgupta76074 жыл бұрын
Also, I think that the density is defined wrongly because if we use mm dimension, density comes in tonnes/mm3. So is it 2100e-12?
@FEADith3 жыл бұрын
you can put any value you want... that's not the point of the video.. the point is to show audience the basic step how to model indentation in composites.. of course, you can always change the number accordingly
@anantharamankn22242 жыл бұрын
Can you please share the material properties of Basalt epoxy composite sir, including its hashin damage properties. I couldn't get it from journals
@meettmj81272 жыл бұрын
Hello thank you for that great video , i was just wondering why you did not assign any mass to the bullet ?
@FEADith2 жыл бұрын
Because its rigid. I guess. And the velocity is directly defined and cobtrolled. So we dont need mass since it is not free falling
@jimmyloluolajide77774 жыл бұрын
Great job. Please I’ve been struggling with acoustic modeling in abaqus. Would you be able to assist? Your feedback is highly appreciated. Thanks
@FEADith4 жыл бұрын
Hi.. sorry but i have no experience on acoustic modeling.
@mattm61703 жыл бұрын
How do you view the stresses on individual plies? When i try it says something about results not available.
@FEADith2 жыл бұрын
In field option, change region to composite plies..
@user-nr1qm8ie3h3 жыл бұрын
Why is there no element deletion when the displacement is increased? The status variable has been output
@pookiyana69633 жыл бұрын
Can you plz make a separate video on multi scale modeling in detail
@FEADith3 жыл бұрын
thank you for your comment.. will be happy to do that in the future.. but can you please elaborate more on what kind on materials you want to see? any specific topic? because multiscale modeling is so wide area.
@pookiyana69633 жыл бұрын
@@FEADith woven carbon fiber polymer composite
@hitman5601 Жыл бұрын
Can you plz tell practical application where we can implement this model undergoing low velocity impact
@ashutosh943004 жыл бұрын
Could you please tell me how to find out the hashin criteria for sisal epoxy composite.
@kirankaware58823 жыл бұрын
how to see delamination in results
@FEADith2 жыл бұрын
This is macroscale. No delamination was modeled. And not possible.
@edanurtaspinar85002 жыл бұрын
@@FEADith Thank you so much sir for your effort. Why we do not modelled delamination in shell element. If we consider delamination between plies , should we modelled as a 3D ?
@FEADith2 жыл бұрын
@@edanurtaspinar8500 yes.. not possible with the current approach available in abaqus.. since all plies embedded to 1 layer shell. unless you come out with breakthrough finding.
@hitman56012 жыл бұрын
Excessive incremental rotation of elements how to remove that error
@Dr.RanjithBabu.B3 жыл бұрын
I need a help could you please help me how to drop weight impact test. Using ACI METHOD
@msc.str.engineermohammedad42693 жыл бұрын
Thank you so much sir for your effort and nice explanation , would you mind if you helping me in my job ? I need to product a non linear analysis of an impact load on a slab reinforced by CFRP @FEADITH Technologies
@kuldeepgupta76074 жыл бұрын
Can you give the link of the paper? I am unable to find the properties
@snehalrana36033 жыл бұрын
Hey can you send me link of your research paper because I'm not able to find online.
@liboyan70102 жыл бұрын
which reference articles for this model?
@pramithdesai6535 Жыл бұрын
Can someone tell me how much time will it take to complete the job
@sumans56234 жыл бұрын
Hey i wanted to learn how to build metal matrix composite can you please help me out
@liboyan70102 жыл бұрын
how to find this model abaqus file(.inp)?
@hitman56012 жыл бұрын
can anyone tell me how to calculate residual velocity???
@FEADith2 жыл бұрын
Residual velocity is for the case the bullet penetrate though the plate and still moving such as bullet impact.. then its is easy to measure residual velocity from field output > velocity > choose a node in the impactor.
@hitman56012 жыл бұрын
@@FEADith ok I will try doing this thank you
@hitman56012 жыл бұрын
@@FEADith bro which velocity we need to consider there are so many velocity?
@rkrs77273 жыл бұрын
How to get damage evolution values for sisal epoxy composite,, if you know please let me know madem/sir, I tried many times for those values, pls let me know if anyone knows, pleas reply to me
@eadionsking77703 жыл бұрын
For 10mm displacement.it must be penetrated,it is only 2mm thick.
@FEADith3 жыл бұрын
Not necessary. The plate can bend.
@davidnavratan23973 жыл бұрын
Can u share ur Google scholar link...
@karthijayan34543 жыл бұрын
Sir what is your scholar profile name
@rkrs77273 жыл бұрын
How to get damage evolution values for sisal epoxy composite,, if you know please let me know madem/sir, I tried many times for those values, pls let me know if anyone knows, pleas reply to me
@FEADith3 жыл бұрын
Experimentally, you can do test like DCB or ENF test to get interlaminar fracture toughness... and do loading unloading test of +-45 degree laminates