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


Prepreg bending stiffness

Prepreg bending stiffness

Prepreg bending stiffness

I am trying to find the bending stiffness of prepreg material for simualting a molding process. There are some tests available such as the buckling test, where a strip of prepreg is axialy compressed and the deflection is measured. But then how would you go from that data to calculating the bending stiffness?



RE: Prepreg bending stiffness

This is like asking " How long is a piece of string?" You need more details What weave? is the prepreg B staged if so how much? are you bending across the fibers , or with them?

You are judged not by what you know, but by what you can do.

RE: Prepreg bending stiffness

Perhaps just run a cantilever type bending test on a sample of the prepreg? Measure displ vs load and back out E.

RE: Prepreg bending stiffness

i agree with Berkshire. I have tried this with foam core materials as well. normally very small tension strain but large compression strain.

one thing if trying to fit a metal modelling program is count on NO stretch, only compression via fiber distortion. fiber distortion will be a function of fabric type and resin type/staging.

Good Luck


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!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close