Gas Cylinder Impact Explicit Dynamic Analysis Using ANSYS

[@akleshgupta906]

is explicit dynamic in ansys is free to use in student version. i cannot do explicit dynamic in my ansys version. could you help me , sir ?

[@cavok99]

9:05 sir why did you rise the element size of the bottom part of gas cylinder ?

[@graspengineering9249]

This simulation is for explanation purpose only.

[@anoirouzamou6900]

Could you please explain how to assign an acceleration low pass filtering to this analysis? in order to compare it with experimentation thank you.

[@graspengineering9249]

You can apply only accleration loads, you need to do filtering on the measured data before.

[@mishalalfadhly7590]

Hello can use in ANSYS lamb wave propagation for cylinder

[@graspengineering9249]

No, we have not used yet.

[@sojinjung5089]

hello sir, thank you for this great video but at the energy summary, i got the energy vs cycles graph instead of energy vs time graph. What is the problem? and can i know how to change it?

[@graspengineering9249]

You should get energy vs time only. Kindly check in latest ANSYS version.

[@sojinjung5089]

@@graspengineering9249 im using ansys 16.0... guess ill have to update it. thank you so much sir!

[@muhammadtayyab6280]

hi, i am trying to solve a similar problem but in my case the container has some bodies inside it instead of gas so the bodies inside do not show as much deformation as they should. there is a foam inside the container and a body on the foam. When i run the analysis the foam do not deform as much given there is 2kg load on it and the whole assembly is dropped from 9m height. Any help will be appreciated!

[@graspengineering9249]

Kindly check the material details for foam and defined proper connections (contact) between all inner components of your container. It should deform as per realistic impact scenario.

[@santoshb6498]

Is it possible to probe force reaction in explicit? I applied displacement as a BC and trying to get force reaction to get f-d curve.

[@graspengineering9249]

Hi ! you can extract reaction on supports. Or else you will need to write script for forces and moment reactions.

[@santoshb6498]

@@graspengineering9249 I tried to get force reaction at fixed support BC but Ansys showing question mark❓‼️

[@graspengineering9249]

@@santoshb6498 You need to keep output setting nodal forces on in modal analysis . If you do this then it will show reactions.

[@revanthavvaru3157]

Super bro

[@graspengineering9249]

Thank You!

[@ranjanbora628]

Hello Sir, Is it possible to apply angular symmetry in explicit dynamic analysis? Also, I want to see the full model with the results after it is solved with symmetry concept. Please tell me how can I do that. Thank you!

[@graspengineering9249]

We have not tried such case, we will try to upload such video. Generally it is better to avoid angular symmetry in case of dynamic simulation. Try to model full model and simulate.

[@navan1087]

where to get cad

[@graspengineering9249]

Refer Grancad library

[@navan1087]

@@graspengineering9249 ok

[@navan1087]

@@graspengineering9249 grancad or grabcad?

[@makwanadharmikishwarlal1765]

@@navan1087 grabcad

[@kumbharamol16]

How to define the end time and the distance of cylinder from the rigid wall.

[@graspengineering9249]

It is input to the analysis. Ideally we should know how much time it will take for impact. You can run for higher time frame, analysis will show the required time of impact.

[@prasadbejgamwar6828]

Can u please do simulation of drop test with drop test wizard available in ansys

[@graspengineering9249]

Okay, we will do. Meanwhile please check our explicit simulation playlist for all the videos on explicit analysis.

[@prasadbejgamwar6828]

@@graspengineering9249 if possible drop test of any assembly will be very helpful

[@supreethrkoundinya2872]

Can you please provide the grabcad link of the geometry?

[@graspengineering9249]

We had created geometry in design modeler.

[@heavenpeacefulmusic5953]

Please discuss "Time step too small error".

[@graspengineering9249]

It is coming due to small element size or length. Try to increase the minimun element length. The min element affect the solution time and sometime it solution come out due to it. We will add solution to this error in our blopost.

[@revanthavvaru3157]

If possible explain implicit analysis and also welding analysis in ansys

[@graspengineering9249]

Okay !

[@prasadbejgamwar6828]

Have done any impact of plastic on rubber

[@graspengineering9249]

Yes

[@prasadbejgamwar6828]

@@graspengineering9249 energy plot are not crossing..going colser initially and not crossing going away and after few times crossing

[@prasadbejgamwar6828]

@@graspengineering9249 internal energy and kinetic energy plot

[@prasadbejgamwar6828]

@@graspengineering9249 why such behaviour...it should cross directly or should not cross...why energy jumping in plot

[@graspengineering9249]

Hello Prasad, Present video is just for explanation of explicit dynamic. Most of parameters are assumed. The kinetic energy of an object the work needed to accelerate a body of a given mass from rest to its stated velocity and in explicit cases we does the same thing as we consider inertia. In drop test simulation at the instance of where the object meet the ground the total potential energy gained at the height of h is transferred to kinetic energy,since there is zero potential energy at ground level. Plot crossing each other means PE is transferred to KE. You should check hourglass energy, which should be less than 5% to 10% of internal energy, which affect the solution results, inaccurate stress & strain results.

[@prasadbejgamwar6828]

Helpful video

[@graspengineering9249]

Thank you

[@sandeepprajapati2188]

Sir how can we drop it from a certain height, means from 8 or 10 metres?

[@graspengineering9249]

You can calculate the impact velocity based on respective height.

[@sandeepprajapati2188]

@@graspengineering9249 how to input that impact velocity?

[@nukadyne2027]

How much time you need to complete the analysis?

[@graspengineering9249]

It is based on your minimum elements size, mesh count, stable time increment, system configuration, etc.

[@Tanmoyb1]

NICE VIDEO SIR

[@graspengineering9249]

Thank you

[@mohmedsalem4417]

how to draw gas cylinder in ansys workbench

[@graspengineering9249]

We modelled in design modeler. Please check our CAD modeling videos.

[@revanthavvaru3157]

Also explain icepack analysis in ansys

[@graspengineering9249]

Okay !

[@blinx7]

Do you know what a sound mixer is? Almost blew out my speakers!!

[@graspengineering9249]

Hi... Is regarding Video ?

[@alializadeh8195]

ممنون

[@graspengineering9249]

Welcome !

[@randomaccount5601]

Can I get your email,I am facing some problems while performing similar simulation

[@graspengineering9249]

Please comment what issue you are facing.