Learning Forum

[clarababymangalath]

I am doing a very simple model where a rectangular rod is sliding over another rectangular rod. I want to introduce spring elements of 0 lengths at the contact between these rods so as to characterize an interphase between them. Does switching on weak springs do the trick or is it totally something else? Can somebody please help me? 

 

The attached figure shows my model with just frictional contact. 

[peteroznewman]

Please describe in detail the physical characteristics of the interface between the two surfaces. I expect a linear spring is an overly simplistic model. What kind of response do you want to see in the results?

Weak springs is a term in ANSYS Mechanical to have the system automatically add springs to every body to prevent zero pivot errors when solving a Static Structural model. You don't use that to do what you want to do.

[clarababymangalath]

oh okay.... so the scenario is, suppose a filament is added into a Panel for example in FRP, then it is assumed that around this filament a layer generates called interface.... it is yet to be characterized. So some studies were done and this interphase was then modelled as springs of zero length connecting node to node at the contact surface. They had used other softwares in this case. With ansys I will have to work with just friction it seems  

[peteroznewman]

You can have zero length node to node springs. What spring rate would you use? If you remeshed and had 4 times more nodes, you would also have to reduce the spring rate by a factor of 4. Look into using contact elements instead.

[clarababymangalath]

Okay let me look into contact elements then first