Hertz Contact Stresses
Hertz Contact Stresses
(OP)
Hi,
I have been trying to model a hemi-cylinder in contact with a brick in 2D, as in the hertz solution for contact stresses.
I fix the bottom of the brick from moving and i apply a pressure to the top of the hemi-cylinder.
But I keep getting two peak tensile stresses at the edge of the contact area.
I am new to Abaqus, and feel as if I am missing something.
Does anybody know how I can get rid of these peaks and get the proper hertz solution.
Any help is much appreciated,
Philip.
I have been trying to model a hemi-cylinder in contact with a brick in 2D, as in the hertz solution for contact stresses.
I fix the bottom of the brick from moving and i apply a pressure to the top of the hemi-cylinder.
But I keep getting two peak tensile stresses at the edge of the contact area.
I am new to Abaqus, and feel as if I am missing something.
Does anybody know how I can get rid of these peaks and get the proper hertz solution.
Any help is much appreciated,
Philip.





RE: Hertz Contact Stresses
corus
RE: Hertz Contact Stresses
The top object is the hemi-cylinder, and the bottom is the brick.
Thanks for your help.
RE: Hertz Contact Stresses
If you need any other of the stresses, just let me know.
RE: Hertz Contact Stresses
corus
RE: Hertz Contact Stresses
I'll try halving my model and applying symmetry conditions and hopefully that'll help. I'll let you know.
I really don't think it's a mesh problem though, as the mesh is very fine at the contact, and it is perfect quads.
The cylinder (slave) mesh is far more refined than the brick (master), so I don't think the surface are passing into each other. I am not particularly concerned with the stresses in the brick.
I'll let you know how I get on,
Thanks
RE: Hertz Contact Stresses
Is there anyone who can help in using abaqus for a roller bearing simulation?
I used a bearing portion with one ball and inner outer collar segments; with increased mesh size I got non converging results.
Any idea?
Many thanks
Bob
RE: Hertz Contact Stresses
corus
RE: Hertz Contact Stresses
Maybe you can attached cae file. I've made such type of analysis. You should get such stress distribution:
http://www.youtube.com/watch?v=OfVRTKDoQHg
There are 2 main theories about "hard contact"
1. Hertz theory
2. Bielajew's theory
In a nutshell...First says that maximum stress value should be in area of contact. Second says that maximum stress values are a little bit shifted from contact area.
Regards
RE: Hertz Contact Stresses
http:/
I downloaded the first 2D input file and then ran it, but I didn't get the same solution as the one shown, does anyone know why?