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.
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?
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..
@@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!
@@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.
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
@@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 ?
@@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.
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.
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.
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
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
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
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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.
will try that thanks.
@@FEADith let me know!
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?
Thank you So much... I could make this
You are so welcome!
Can you please share the material properties of Basalt epoxy composite sir, including its hashin damage properties. I couldn't get it from journals
Great work! Thanks for sharing. I have one question:
How fast is the impact and how can I change the speed?
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..
@@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!
@@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.
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?
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
Can you plz tell practical application where we can implement this model undergoing low velocity impact
How do you view the stresses on individual plies? When i try it says something about results not available.
In field option, change region to composite plies..
Why is there no element deletion when the displacement is increased? The status variable has been output
Excessive incremental rotation of elements how to remove that error
Hello thank you for that great video , i was just wondering why you did not assign any mass to the bullet ?
Because its rigid. I guess. And the velocity is directly defined and cobtrolled. So we dont need mass since it is not free falling
Can someone tell me how much time will it take to complete the job
Great job. Please I’ve been struggling with acoustic modeling in abaqus. Would you be able to assist? Your feedback is highly appreciated. Thanks
Hi.. sorry but i have no experience on acoustic modeling.
how to find this model abaqus file(.inp)?
Could you please tell me how to find out the hashin criteria for sisal epoxy composite.
Hey can you send me link of your research paper because I'm not able to find online.
Can you give the link of the paper? I am unable to find the properties
which reference articles for this model?
I need a help could you please help me how to drop weight impact test. Using ACI METHOD
how to see delamination in results
This is macroscale. No delamination was modeled. And not possible.
@@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 ?
@@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.
Can you plz make a separate video on multi scale modeling in detail
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.
@@FEADith woven carbon fiber polymer composite
Hey i wanted to learn how to build metal matrix composite can you please help me out
can anyone tell me how to calculate residual velocity???
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.
@@FEADith ok I will try doing this thank you
@@FEADith bro which velocity we need to consider there are so many velocity?
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
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
Sir what is your scholar profile name
Can u share ur Google scholar link...
For 10mm displacement.it must be penetrated,it is only 2mm thick.
Not necessary. The plate can bend.
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
Experimentally, you can do test like DCB or ENF test to get interlaminar fracture toughness... and do loading unloading test of +-45 degree laminates