×
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

Sandwich panel stress analysis

Sandwich panel stress analysis

Sandwich panel stress analysis

(OP)
I'm trying to figure out the yield stress of a plywood core (0.72", 7 ply douglas fir), SST faced (0.015"), plymetal panel subject to bending. I am assuming that the stress strain relation is nonlinear elastic, theoretically placing the yield stress at a strain of 0.005. However, upon performing destructive testing of a sample with strain gages on the outer faces, can I assume that the strain readings are representitive of the strain for the entire panel, or just for the outer SST skins?
Should I just assume that the panel's mechanical properties are similar to that of the plywood, or does adding the skins increase the strength of the panel enough to warrant the testing?
I'm somewhat new to the sandwich panel design world, so any input would be greatly appreciated.

RE: Sandwich panel stress analysis

(OP)
I found information from the Engineered Wood Association on design and fabrication of plywood sandwich panels. It gives stress analyisis formulas for plywood faced, foam/balsa/honeycomb core panels. Could these formulas be applied to stainless steel faced, plywood core panels, or are they specific to plywood faced panels?

http://www.gp.com/panels/pdf/apa/u814.pdf

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