Jump to content
Iskw

How to show bending stress of the shell element ?

Recommended Posts

As far as I understand, the mises stress at the middle of the shell element is membrene stress, and the mises stress at the surface of the shell element is sum of the membrene stress and bending stress.

and the hyperview can show the stress of the mid layer and both surface layer of the elements.(Z1, Z2, or Max)

How can I show the contour plot of only the bending stress of the element ?

 

I mean that I want to get the contour plot of value of ((Z1, Z2 or Max) - Mid layer ).

 

Thanks for your help in advance.

Share this post


Link to post
Share on other sites

By default OptiStruct solver extract results for stresses at element centroid. At preprocessing stage we have option to get stress output at corner.In that case one can envoke use corner data option in HyperView.

In HyperView you would get option to get stress at different layer for shell element. PFA screenshot for your reference.

Layer in HV.JPG

Shivani Tiwari likes this

Share this post


Link to post
Share on other sites

Sorry for confusion.

 

Please find attached picture.

In this picture, the (1) shows the mises stress at the middle of the thickness of shell element.

(2) shows the mises stress at the each surface of the shell element. in other words, the mises stress value of Z1 and Z2.

The stress value of (2) is consists of (membrane + bending) stress, so I thought that I can extract the bending stress (3) from (2) - (1).

 

As for an individual element, I can obtain the (3) value by hand calculation, but I want to get the contour plot of the (3) = (2) - (1) at whole model.

Or is there any direct method to plot the contour of the bending stress ?

 

5a8d23ab8d474_stressshellelem.thumb.png.35f0d936b36086f362124bc2afac7c8b.png

 

Share this post


Link to post
Share on other sites

Hello,

 

Do it as tinh has proposed.

Be sure to load your files with Result-Math template "Advanced".

Then call the Expression Builder (Derived Results) and create a Tensor for bending. See attached picture.

 

Best Regards,

Mario

 

 

BendingStress.PNG

Rahul R likes this

Share this post


Link to post
Share on other sites
On 2/21/2018 at 12:23 PM, Rahul R said:

By default OptiStruct solver extract results for stresses at element centroid. At preprocessing stage we have option to get stress output at corner.In that case one can envoke use corner data option in HyperView.

In HyperView you would get option to get stress at different layer for shell element. PFA screenshot for your reference.

Layer in HV.JPG

Sir can you please tell if I have a set of elements for Static load analysis and want to calculate von misses stress.

Which layer should I use? 

As I am new to it I don know 

 

Share this post


Link to post
Share on other sites
7 minutes ago, Q.Nguyen-Dai said:

Max Von Mises stress found always on upper or lower layer. If you shell has small thickness and loading is not so important, the difference between layers is small.

Means upto 2 mm thickness I can use value of any of layer?

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
You are posting as a guest. If you have an account, please sign in.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...