×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Stress Error Fringe Plots

Stress Error Fringe Plots

Stress Error Fringe Plots

(OP)
Hello,

I have been using pro mechanica for a couple of years now and have been dealing primarily with Dynamic Time and Dynamic Random analyses and would like to know if there is anyone out there that is utilizing the stress error fringe plots available in WF5 and Creo 1.0?  The analyses I am running are getting a lot more complex and I am becoming increasingly unsure of my analysis convergence criteria.  I have very little understanding of the stress error plots and how to use them.  Conceptually I know the difference between local and global quantities as well as the different methods of normalization used by the analysis definition but not the interpretation.  I have read as much literature as I can find online and through PTC support and knowledge base though there isn't very much out there to work with and none seemed to help.

Some of my current model's elements report stress errors of 50% to 150% when normalized by maximum element stress but less than 10% when normalized by maximum model stress.  So far I have tended not to accept the maximum model stress normalization due to constraint and/or geometrical singularities that have not been excluded from the calculation.

Can anyone help provide some clarification or advice on the use of the stress error fringe plots and/or the use of the advanced control for SPA convergence?  When I try to set lower targets in areas of interest my analyses never converge on those targets.  At this point I worry about my lack of experience and understanding of these stress errors (though I am confident in my designs and I have some margin to play with) and am just wanting a little more fidelity for future works.

Thank you in advance for your help,

- jvian -

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources