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Kenji

How to apply pressure/distribution load on hypermesh?

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Hi Prakash,

 

I have a question.

Considering I have 100Kg applied on a surface of 1m^2. I have a pressure of 100 kg/m^2=981N/m^2=9,81*10^-4 MPa.

The total number of elements is 200 so each one is 5mm^2.

 

Why have I to divide the total pressure by the total number of elements??

 

To obtain the pressure on each element I guess I have to multiply the pressure (9,81*10^4 MPa) to the area of each element.

 

Or not? Sorry I'm quite confused, I don't understand why I have to divide the pressure by the total number of elements.

 

 

thank you.

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On 11/30/2016 at 11:54 PM, Prakash Pagadala said:

@Kenji

 

First calculate the pressure you want to apply (P= Force/ Area) 

 

Then select the plates and get the number of elements in that area, Say total number of elements is N in your plate.

 

Divide the Pressure per element (P/N). This is the pressure applied on each element.

 

Go to Pressure panel>> Enter the value (which is P/N) and provide the direction.

 

Hi, Prakash Pagadala: are you sure on you write ? I think it's WRONG to divide the calculated pressure per elements number !!!

 

Please check & correct it!!!

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On 8/6/2018 at 9:16 AM, Q.Nguyen-Dai said:

Hi, Prakash Pagadala: are you sure on you write ? I think it's WRONG to divide the calculated pressure per elements number !!!

 

Not sure in what context I replied that. I have noted that I included P/N... I have removed the reply to avoid confusion and I will post after going through it again

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Hi @Staedtlerp Sorry for the confusion,  

 

I miscalculated. the pressure on the element face is distributed to the corner nodes (using shape function)

 

anyways, It shouldn't be divided by the element number. to make it easy, you can select the surface on which you want to apply the pressure. 

 

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Prakash Pagadala

Thank you very much. I think I'll do in this way, selecting the surface at which elements are associated.
But I have a question: on the tutorial "Composite optimization of a skateboard with Optistruct", pag. 13, how are calculated pressures? It seems that the pressure is divided by the total number of elements.

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On 8/7/2018 at 5:28 AM, Staedtlerp said:

Prakash Pagadala

Thank you very much. I think I'll do in this way, selecting the surface at which elements are associated.
But I have a question: on the tutorial "Composite optimization of a skateboard with Optistruct", pag. 13, how are calculated pressures? It seems that the pressure is divided by the total number of elements.

 

NEVER!

 

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@Q.Nguyen-Dai

 

Agree.. I corrected my statement. it shouldn't be divided. I am still not clear what P/N was in my previous reply. Anyways. theoretically, the pressure is distributed to the nodes on the element face. Based on this one can conclude. 

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