×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• 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.

Off-Axis Poisson Ratio interpretation

Off-Axis Poisson Ratio interpretation

(OP)
Hello,

I am working on some graduate level coursework and I am finding an off-axis Poisson ratio for a lamina is as high as 0.55 at a certain angle. I have a few references that show similar trends (Gibson's principles of composite material mechanics and this one here https://ecm-academics.plymouth.ac.uk/jsummerscales...). I cant get away from the idea that Poisson ratio cant exceed 0.49... but yea I get it, its not an isotropic material. What's the interpretation of this? Is this expected?

RE: Off-Axis Poisson Ratio interpretation

Yes, it is expected.

RE: Off-Axis Poisson Ratio interpretation

because its not isotropic

RE: Off-Axis Poisson Ratio interpretation

(OP)
Thanks for your replies, are there expected boundaries on these values then or are they just a direct result of calculated values in the lamina?

RE: Off-Axis Poisson Ratio interpretation

Hey guys...

I wonder if this could also indicate some difficult to deal-with interlaminar forces that could require unique 'thru-reinforcement'???

Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

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.

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!