×
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

Layup sequence notation

Layup sequence notation

Layup sequence notation

(OP)
Hi - I have come across a notation for composite laminate sequence / layup that I am not used to - can anyone help? I am used to seeing for example [0,45,90]s but I have just read [0, 45, 90]so - is anyone familiar with this difference and what it means?

RE: Layup sequence notation

Not for certain, but symmetry about the rightmost ply is often indicated by s_bar (an overline above the s), which is often hard to reproduce; I've no idea how to make the computer do it. ( [0/45/90]s_bar is [0/45/90/45/0] whereas [0/45/90]s is [0/45/90/90/45/0] .) It might possibly alternatively mean antisymmetric, though this is more often 'as' where [0/45/90]as is [0/45/90/90/-45/0]. Sorry not to be more definitive. Does anyone have a handy source of such notation? NASA RP 1351 uses a T for the total laminate and puts the bar above the ply angle that goes on the centreline, not above the 's'. No 'o's though.

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