Pressure Vessel Hydrostatic test analysis as per ASME Guidelines using ANSYS

[@raghu.r414]

U have done a great job

[@graspengineering9249]

Thank you !

[@WilliamLandrini]

With hydrostatic pressure is not calculated water weight on the support. Are you calculated force reaction on the support? Thanks for your reply

[@graspengineering9249]

We followed the ASME load combination in which Hydrostatic pressure (Ps) is calculated as , rho,g,h, etc. You can add water weight in dead weight case not in pressure case.

[@drury2d8]

Hi! The dead weight for an elastic plastic analysis is a factored acceleration value?

[@graspengineering9249]

Please refer table 5.5 for load combination of elastic plastic. Load factors are applied to the summation of load cases. Such as factor load * (P+Ps+D).

[@drury2d8]

@@graspengineering9249 I do know the load combinations, but dead weight depends on the value of 'g' and mass, right? The software requires the value of g but not mass. How would the dead weight be factored? 2.4*D, where D = 2.4*g = 23.52 m/s^2?

[@graspengineering9249]

Dead Weight is considered by applying self gravity or 1 g acceleration and if you have load factor of 2.5*g then apply acceleration load as mentioned by you (2.4*g). Make sure your reaction should match the applied load.

[@drury2d8]

@@graspengineering9249 Thank, you, it is clearer now!

[@hanumateducations373]

Sir, where to learn ansys?

[@graspengineering9249]

We have 100+ videos on FEA with ANSYS. You start exploring the videos. Start with geometry creation, meshing and then simulation.

[@hanumateducations373]

@@graspengineering9249 ur contact please

[@nidakhan7873]

Greetings! Thanx for uploading the requested video. can we model the pressure vessel in 2 ways 1. considering cylinder , end cap , pads and support legs as shell elements and modeling( FE modeling ) nozzles as 3D elements hex or tetra. 2. Modeling the whole vessel as tetra elements. I understand as in case 1 , we can simulate the prediction for the total deformations for corresponding loading cases . In case 2 we can predict all the behaviour as in case 1 in addition to the membrane and bending behaviour stress across the thickness , so by maintaining solid mesh at least 3 elements across the thickness we can capture the stress behaviour more properly. is this the case u have chosen tetra mesh to capture the stress across the end cap thickness ? while in case 1 we can extract mid surface and consider all parts to be shell expect nozzle, by doing so we can not maintain 3 elements across the thickness as the geometry will be surface body. so you have done solid mesh and you recommend us to maintain minimum 3 elements across the thickness to capture stress more accurately across the thickness. is my understanding right.? yes as per calculation part i will try to validate and get back to you but please can you help me clarifying the preliminary part in FE modeling. Thank you in Anticipation

[@graspengineering9249]

Thank for the detail view of video. Regarding first approach, you can do shell mesh for shell, saddle while solid mesh for lifting lugs, but you can do solid mesh of some part of shell nearby lifting lugs, this is due to avoid solid shell contact at the junction of lugs with shell. Regarding second approach, if you are doing this work for clients or for validation it will be good if you can follow minimum three elements approach either with tetra or solid elements. I had used coarse mesh just to showchase the methodology.. You can even do stress linearization(membrane, bending stress extraction) with shell mesh too. The approach is different here, I will create one more video for that...

[@anassnazeer1995]

How and where did you add the fixed support ?

[@graspengineering9249]

You should add at the fixing location. In present video, constraints are at bottom of the saddle.

[@mandeepk5407]

Hello Sir thanks for providing such informative tutorials but I can not find design video which you are talking about and referring to watch

[@graspengineering9249]

Thanks ! Please check our design modeler playlist for modeling video. kzbin.info/www/bejne/jYmuhnahrp52qqM

[@kushalmasal]

Can we use guidelines from Sec VIII DIV. 2 to the vessel designed by Div. 1 ?

[@graspengineering9249]

Yes, for analysis only div.2 have design by analysis approach. So you can use the same for div.1 vessel.

[@mohammadsameer5098]

hi. can you make a video about ASME standards to illustrate how to handle it and getting allowable stress? I appreciate your cooperation, your videos are soo effective. thanks

[@ehabnjm9814]

yes, that is will be good

[@graspengineering9249]

Okay we will do !

[@gauravbhoye3935]

Can You share this Model??

[@graspengineering9249]

We will try to upload at our blogpost.

[@MrUlhasan]

Hi, if possible could you please upload any video you made on limit load or elastoplastic analysis of pressure vessels. Many thanks

[@graspengineering9249]

Will try

[@MrUlhasan]

Can I have your email ID please.Thanks

[@graspengineering9249]

Kindly check our channel Introduction. You can approach us on [e-mail]

[@TheSyahdi78]

As always very good and informative video...👍 However there is a statement of compensating pressure and pressure thrust that confusing in this video. In the video you apply a compensating pressure but then you mentioned it as pressure thrust. It supposed that compensating pressure is not equal to the term of pressure thrust. Pressure thrust normally acting in axial direction meanwhile compensating pressure is apply on surface area..

[@graspengineering9249]

Hello, Thanks! Both compensating pressure is applied to compensate the effect of internal pressure at the openings hence it is also called as thrust pressure. In present scenario both are same.

[@subratsenapati7752]

Hii , Can we do elasto plastic limit load calculation in ANSYS or ABAQUS? Any help regarding this will be very helpful to me.. I am waiting your reply.

[@graspengineering9249]

Yes.. For limit load analysis you will need elastic perfectly plastic with special Yeil strength material model and small displacement theory. For elastic plastic, you will need elastic plastic with specified stress strain curve and effect of nonlinear geometry on.

[@subratsenapati7752]

I am doing a 2D crack analysis. So as load label increases the plastic spread grows. I am confused which load i have to choose as limit load. And i am using ramberg ossgood material model. Because i have to consider the hardening effect of the material.

[@graspengineering9249]

Forward details, we will check

[@subratsenapati7752]

Can I get your contact? My email I'd is [e-mail]

[@graspengineering9249]

Kindly refer channel introduction page for contact details.

[@vishalbharadwaj4759]

can you please upload video on "pressure cooker transient thermal analysis in ansys workbench"

[@graspengineering9249]

Okay, We will upload video on transient thermal analysis. You can also find videos on transient & thermal Analysis on our channel. #graspengineering

[@praffulchaudhary664]

Hi, Can you provide the training also?? If yes please share a contact detail for approach.

[@graspengineering9249]

It is difficult to spend time for individual training. But we are working on detail FEA course, you are welcome to subscribe, thanks.

[@rdoifode]

Hi, thanks for uploading this videos...they are very informative. I have one query...for test case code give guideline about Primary Stress...Pm..and silent about local stress Pl...SCL which you take are in the region of localized stress region...how we can category it into Pm...and apply allowable limit of it..it shall be Pl.. But for which for test case there is no guidlines...please clarify my doubt. Thank

[@graspengineering9249]

Welcome ! As per code, in case of test case, you should consider Pm, Pm+Pb & Pm+Pb+Q. So, whenever you will extract SCL at discontinuity region, you should consider as Pm+Pb not Pl.

[@ashadsajid9236]

Hi Sir M API certified company m work krta ho Sir mjay API 6a kah standard Ke requirements kah mutabek stress analysis krna ha please sir ap us sy related koi demo krday DSA, yah Spacer spool etc py API 6X standard use hota ha for design calculation Kindly Sir take out me from this problem by one demo

[@graspengineering9249]

the API and ASME might have similar approach. we will try to upload one video on analysis with respect to API standards. You can share your problem definition with us.

[@ashadsajid9236]

@@graspengineering9249 sure thanks ❤️

[@mntutube]

My friend you are too quick. Please be slow when you are clicking. Slow and explain at the same time.

[@graspengineering9249]

Thanks for advice!