XANSYS Message: 187 [Go back to message list] [bookmark on del.icio.us]
No rating yet Subject: Re: Stress concentrations Author: Brent Brower Date: 1999-01-12 10:48:00I appreciate all of the help, I am trying may of the things suggested.
Adding nonlinear material around the contact has seemed to help. If I were to ignore the stress concentration The rest of the stresses in the model compare reasonably close with hand calculations (simplified model, of course). It just bothers me that the high stress region is there. The area of interest in the part is not even near the area of the stress concentration. The real thing that bothers me is that someday I may be looking a part with a stress singularity similar to this case and I won't be able to truly determine what is happening. In this case there is an existing part and there is not problems do to the high stress that I am seeing. The actual failure is occurring elsewhere else in the part.
Once again, thanks to everyone who posted. I feel that I have a pretty good understanding about what is going on now.
Any more suggestions are welcome.
Brent
> -----Original Message----- > From: Rick Fischer [SMTP:Rick.Fischer@c...] > Sent: Tuesday, January 12, 1999 10:03 AM > To: undisclosed-recipients; @u... > Subject: [xansys] Re: Stress concentrations
> From: "Rick Fischer"
> Evan is of course right. Those of us out here in cyberspace > have at best a fleeting glimpse of the problem, and dont know > what the final goal of the analysis is. The advice some of us > have given is good, accurate stuff, but may not be appropriate > for the actual context of the problem. I personally have a > nagging tendency to be seduced by the darkside of nonlinear > FEA. As a reality check, consider whether your model > represents a new design or existing hardware. If it exists, > how does it perform? If the performance is acceptable, then > the high stress may be (cant say for sure without seeing the > model) an artifact of your FEA model.