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!

*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.

Jobs

A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

(OP)
Hi there
Good day

i have some inquiry and curiosity, may I know, is the terminology/notation for A11 calculated based on CLT for homogenous composite
similar with E11? (modulus of elasticity in 11 direction)

thanks

RE: A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

Similar but not exactly the same.

E11 = 1/(a11*t) where a is from inverse of ABD

RE: A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

(OP)
Many thanks SWComposites..I really appreciate your respond and reply
hence E11 is A11 divided by thickness of the laminate then?
am i right?
many thanks SWcomposites

RE: A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

Arrisa, no. To further extend:

Symmetric laminate (need not be balanced): Ex = 1/(a11*t)
Symmetric and balanced laminate: Ex = (A11-A12^2/A22)/t
Unsymmetric laminate: Calculation based upon what curvatures are restrained and only equal to the above if all curvatures are not restrained. But that is not the typical scenario and usually one or more curvature directions are suppressed when an in-plane load is applied to an unsymmetric laminate.

Brian
www.espcomposites.com

RE: A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

(OP)
E11 in my case is E longitudinal direction
Ex = E22 right?
hence in my case E11 = Eyy

RE: A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

No.

E1 = lamina fiber or warp dirction
Ex = laminate x direction (x is usually set = 0 fiber direction)

Please get a laminated plate theory text and study it.

RE: A11 in ABD matrix based on CLT compared with E11 (modulus of elasticity) composite in 11 direction

(OP)
tq so much SWComposite and ESPcomposite

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


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