Thanks for this superb video.... The best part is you have created geometry of bullet and plate.... in most of other videos on this miss the important part.... Thanks again....
Nice one..... One more request to you if it possible to the effect of shaped charge of 'V' with RDX, PETN or any explosive on any material then please explain me....
was able to do it once but when i try to repeat it with the same model but different materials the mesh kept failing and didnt want to start solving. any help?..
Hi, I just started to play around with Ansys explicit dynamics (student version) and I am facing an issue. I modelled a "bullet" with a diameter of 10mm, slightly tapered to 5mm at the tip, facing a 3mm piece of sheet metal - so pretty close to what you have done here Material for bullet is tungsten carbide (very hard) Material for sheet is aluminium alloy Both are set to "flexible" All my settings are basically same as yours, but it doesnt matter how high I am cranking the speed of the bullet (went up from 750 to 5000m/s) the bullet is not able to penetrate the sheet. What also makes no sense is this: My sheet metal is 100x100mm, and fixed at two sides but the data says, that it is getting stretched over 1000mm during impact..so the material should have failed way before that.... any idea, what could be wrong in my settings? I guess somewhere I am missing to set, that the sheet/plate can be "ripped apart" by the projectile Many thanks in advance! =)
Add "Erosion strain". Try with "Erosion strain" to 2. Also, add failure strain to, at least the target material model, roughly a value 0.3 (depends on material). After the addition of failure strain, remember to set the "Erode element after failure". If it is not done the mesh will keep on stretching without any failure sign.
Somehow my bullet does just one step when i playback the animation. Its not like your smooth playback where you can watch the bullet slowly passes through the plate, just its initital location and then a jump to a point where it has passed through the plate.
Use standalone Autodyn. Set energy reference cycle to very high, like 9999999. Start solution and stop before the time erroe occurs and set Minimum time step below your error time step. This will allow solver to choose time step smaller than restricted initially.
Hi I've been using ansys for a while for my project about armored vehicle against certain calibre. Can we make the simulation also breaks the bullet? Because of course the bullet will expand on impact. So far I see what I created was the plate was broken if my armor fails or just got bruised a bit if it works, but the bullet still in perfect condition
Yes, you can. I have used a Steel bullet and Aluminium target. Steel bullet has more strength and more kinetic energy due to its density. You can try by exchanging materials. Also, give proper material erosion or failure criteria.
@@Jim27380 bro i am defining Kevlar epoxy material property with different orientation in ACP pre but i am not able to transfer solid composite model from acp to explicit dynamic It only accepting shell model what to do???
BRO PLEASE TELL ME I AM PERFORMING IMPACT ANALYSIS ON ANSYS EXPLICIT DYNAMIC, WHICH VELOCITY WE NEED TO CONSIDER AS RESIDUAL VELOCITY AS WE GET MAXIMUM, MINIMUM AND AVERAGE VELOCITY ON BULLET AFTER PENETRATION
I never tried it. But one can use it for solving forging or forming simulations which involves not much change in mesh every time step and no erosion as such.
It is roughly target thickness divided by bullet speed, let say X. Now bullet speed will gradually drop while penetrating, so multiply X by factor of 2 or 3 which is your rough simulation time
Purpose of this tutorial is to show how to set-up the impact problem in Autodyn. To simulate real bullet impact you need material properties of real target and bullet and, need to model real bullet shape. Also, the mesh needs to be finer. You will get penetration depth as output.
@@truptipatil3422 can you please perform an analysis where you provide complete data including material model? also time step calculation and mesh type and size?
![Chlöe - Shake (Feat. Jeremih) [Official Visualizer]](http://i.ytimg.com/vi/aDs_1ufpfv8/mqdefault.jpg)
Best part is you even reply to the doubts **respect**
That got me up and running. Thanks.
This was awesome! Thanks a lot
tai khota nai bolat jeev vachvla tumi.... last day hota submssion cha !!!!!!! Dhanyaaavvaaad ! from canada ( pn me punerkar a.. thanks a lott)
Thanks for this superb video....
The best part is you have created geometry of bullet and plate.... in most of other videos on this miss the important part....
Thanks again....
Nice one.....
One more request to you if it possible to the effect of shaped charge of 'V' with RDX, PETN or any explosive on any material then please explain me....
was able to do it once but when i try to repeat it with the same model but different materials
the mesh kept failing and didnt want to start solving. any help?..
Hi, I just started to play around with Ansys explicit dynamics (student version) and I am facing an issue.
I modelled a "bullet" with a diameter of 10mm, slightly tapered to 5mm at the tip, facing a 3mm piece of sheet metal - so pretty close to what you have done here
Material for bullet is tungsten carbide (very hard)
Material for sheet is aluminium alloy
Both are set to "flexible"
All my settings are basically same as yours, but it doesnt matter how high I am cranking the speed of the bullet (went up from 750 to 5000m/s) the bullet is not able to penetrate the sheet.
What also makes no sense is this:
My sheet metal is 100x100mm, and fixed at two sides but the data says, that it is getting stretched over 1000mm during impact..so the material should have failed way before that....
any idea, what could be wrong in my settings? I guess somewhere I am missing to set, that the sheet/plate can be "ripped apart" by the projectile
Many thanks in advance! =)
Add "Erosion strain". Try with "Erosion strain" to 2. Also, add failure strain to, at least the target material model, roughly a value 0.3 (depends on material). After the addition of failure strain, remember to set the "Erode element after failure". If it is not done the mesh will keep on stretching without any failure sign.
@@truptipatil3422 From where do we add erosion strain. I am not able to find the option?
Use the failure material model, without which u will not be seeing the ripping of the blade no matter what ur velocity of the bullet be
Sir, how to define the END TIME ?
thanks a lot
Somehow my bullet does just one step when i playback the animation. Its not like your smooth playback where you can watch the bullet slowly passes through the plate, just its initital location and then a jump to a point where it has passed through the plate.
Try to write result files more frequently than current setting.
How to find diameter of hole??
Actually mine error was coming like Time step too small. What should I do then ? I did exact same steps like you showed
Use standalone Autodyn. Set energy reference cycle to very high, like 9999999. Start solution and stop before the time erroe occurs and set Minimum time step below your error time step. This will allow solver to choose time step smaller than restricted initially.
Hi I've been using ansys for a while for my project about armored vehicle against certain calibre. Can we make the simulation also breaks the bullet? Because of course the bullet will expand on impact. So far I see what I created was the plate was broken if my armor fails or just got bruised a bit if it works, but the bullet still in perfect condition
Yes, you can. I have used a Steel bullet and Aluminium target. Steel bullet has more strength and more kinetic energy due to its density. You can try by exchanging materials. Also, give proper material erosion or failure criteria.
it doesn’t work, the material stretches but doesn’t tear
Cad model pls 🙏
Awesome vid! but mine never penetrate the plate they just bounce back like jelly :/
Yours may be only elastic material properties. You need to add plasticity with some failure criteria (elastic-plastic).
@@truptipatil3422 found out what it is... i was using the default structural steel and it has no explicit properties or something i think
Can it be done for laminated composites as well?
Yes it can be done
@@kbdrupad4493 very fast bruh, my project is over 😊
@@Jim27380 sorry haven't seen when you added that comment
@@Jim27380 bro i am defining Kevlar epoxy material property with different orientation in ACP pre but i am not able to transfer solid composite model from acp to explicit dynamic
It only accepting shell model what to do???
BRO PLEASE TELL ME I AM PERFORMING IMPACT ANALYSIS ON ANSYS EXPLICIT DYNAMIC, WHICH VELOCITY WE NEED TO CONSIDER AS RESIDUAL VELOCITY AS WE GET MAXIMUM, MINIMUM AND AVERAGE VELOCITY ON BULLET AFTER PENETRATION
how do we use adaptive mesh
I never tried it. But one can use it for solving forging or forming simulations which involves not much change in mesh every time step and no erosion as such.
bro how did to calculated time plz explain ?
It is roughly target thickness divided by bullet speed, let say X. Now bullet speed will gradually drop while penetrating, so multiply X by factor of 2 or 3 which is your rough simulation time
This is utter rubbish. This analysis does not provide any useful information about the real world bullet impacts.
Purpose of this tutorial is to show how to set-up the impact problem in Autodyn. To simulate real bullet impact you need material properties of real target and bullet and, need to model real bullet shape. Also, the mesh needs to be finer. You will get penetration depth as output.
@@truptipatil3422 can you please perform an analysis where you provide complete data including material model? also time step calculation and mesh type and size?
@@ahmadazmat4984 wtf bro the video is really nice a well explained, just the basics