Solving Modeling Problem with 2 Intersecting Rectangles

  • Thread starter Thread starter ahanesh
  • Start date Start date
  • Tags Tags
    Modeling
Click For Summary

Discussion Overview

The discussion revolves around a modeling problem involving two intersecting rectangles in a simulation environment. Participants explore how to define one rectangle as a rigid body, the implications of their intersection, and the effects of applied forces on the structures. The focus is on the technical aspects of modeling, including boundary conditions, loading conditions, and the behavior of the rectangles under static analysis.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant inquires about defining one rectangle as a rigid body and questions the deformation of the vertical rectangle without affecting the horizontal rectangle.
  • Another participant asks for clarification on the creation of the rectangles and their intersection, suggesting that contact elements may be necessary for load transmission if the rectangles are physically independent.
  • A participant confirms that the rectangles are 2-D and describes them as L-shaped, mentioning that a force is applied to one rectangle, which should deflect the horizontal rectangle constrained at one end.
  • There is a suggestion that avoiding contact could be achieved by treating the two rectangles as a single solid body, implying that they may behave as separate bodies otherwise.
  • One participant expresses concern that using contact elements would introduce nonlinearity into the analysis, which contradicts their assumption of linear static analysis, and mentions difficulties in achieving a perfect bond in classical ANSYS.

Areas of Agreement / Disagreement

Participants express differing views on the necessity of contact elements and the implications of treating the rectangles as separate bodies versus a single solid body. The discussion remains unresolved regarding the best approach to model the interaction between the rectangles while adhering to the assumptions of linearity.

Contextual Notes

Limitations include the assumptions about the rectangles' behavior, the dependence on definitions of contact and rigidity, and the unresolved mathematical implications of using contact elements versus treating the rectangles as a single body.

ahanesh
Messages
3
Reaction score
0
Hope this finds you well...

i am having a problem analyzing a simple model that consists of 2 rectangles intersecting. the creation of the rectangles, material definition, BC, loading conditions...etc is done. but first: how can i define one rectangle to be a rigid body? second: the vertical rectangle seem to deform, but has no effect whatsoever on the horizontal rectangle??

Please help. Thank you in advance

P.S I've included a file of the model.
 

Attachments

  • ansys model1.JPG
    ansys model1.JPG
    12.3 KB · Views: 531
Engineering news on Phys.org
How were the two rectangles, which I assume are bars, or blocks created? Are these rectangles 2-D?

What does it mean that the two rectangles are intersecting? Does the vertical rectangle sit atop the horizontal rectangle?

If these are two physically independent structures, one needs to use contact elements between the nodes, which are in contact at the two surfaces. This allow the transmission of load and allows contacting nodes to displace together.

http://www.uic.edu/depts/accc/software/ansys/html/elem_55/chapter4/ES4-12.htm
http://www.uic.edu/depts/accc/software/ansys/html/elem_55/chapter4/ES4-52.htm
 
Last edited by a moderator:
they were created using simple rectangle areas. yes thery are 2-D.
there are like L-shated rectangles. forct is applied at one rectangle from its farend horizontal line, which if effect should deflect the horizontal rectangle which is only constrained from one end. the simulation is supposed to be linear and static. is there any way i can avoid contact?

Thank you for your reply
 
is there any way i can avoid contact?
I believe the only way would be to have a single solid body. I suspect the 'two' rectangles behave as two separate bodies, and hence, contact elements between adjacent contacting nodes (or adjacent elements) are necessary.
 
yes. but hen i use contact element, my analysis will somewhat involve nonlinearity of which is not the assumption considered in my type of analysis. i ant to considere a perfect bond wetmeen the bodies and contact is not to be considered. this can be easly accoplished in Ansys Workbench, but in classical ansys, failure is my end result :(
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
5K
  • · Replies 62 ·
3
Replies
62
Views
7K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
1
Views
3K
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 6 ·
Replies
6
Views
1K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 26 ·
Replies
26
Views
6K