Learning Forum

[Mert ÖZKAN]

Hello,

I am doing some analysis to predict the burst pressure for Type-4 pressure vessel. I am using ACP toolbox to model composite sutructure and Static Structural toolbox to perform the analysis. Here I define the polyethylene material in the library as the lining material and all my analysis says it explodes at 25 MPa. However, I am performing this analysis with the expectation of a pressure value much higher than this pressure value. When I perform these analyzes together with the static structural, much higher values are reached. After performing these analyzes, the closeness of the analyzes to reality made me nervous. Then, if I model these analyzes as if it is Type-5 tubes, will it gives a result close to the value I would get in a Type-4 tube?

Mert

[Ashish Khemka]

Hi Mert,

Which material model are you using? For predicting the burst you should have the stress-strain data points till ultimate strength.

Use Multilinear Kinematic Hardening to define the material.

Defining a Multilinear Hardening Plasticity Model | Ansys Courses

 

Thanks and Regards,

Ashish Khemka

 

[Mert ÖZKAN]

Hello Ashish,

Thank you for your prompt reply. Actually I didnt do anything that  as you mentioned. I tried to find burst pressure for the pressure vessel I defined damage model only. I saw this post on this platform and I tried it. But I am not totally sure of the results and I thougt if I do this analysis for Type-5 tank maybe it gives similar result.

https://forum.ansys.com/forums/topic/how-to-find-burst-pressure-of-a-pressure-vessel-in-ansys/

I will try your mentioned steps again. 

 

Regards,

Mert