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


hydroforming of carbon nanotubes reinforced composites.

hydroforming of carbon nanotubes reinforced composites.

hydroforming of carbon nanotubes reinforced composites.


I want to know if hydroforming process is applicable in forming of carbon nanotubes reinforced composites or any other metal forming process that can be implemented, as I want to do a finite element analysis on the above subject.

thank you

RE: hydroforming of carbon nanotubes reinforced composites.

Almost any sort of forming of fiber composite needs a ductile matrix, although Glare (a layered fiber metal laminate or FML) can be formed to a degree and forming of dry fabrics can also be undertaken.

If a thermoplastic matrix or metal matrix (TPMC or MMC) is used than they can be formed with fibers in situ.

A thermoset polymer matrix (PMC) can be formed while the matrix cures and becomes more-or-less solid (though it's often above its Tg on solidification), as in diaphragm forming of continuous fibers or bulk molding or sheet molding compounds (BMCs or SMCs, together often known as compression molding compounds or CMCs). CNTs are probably more similar to the situation with a CMC. NB: do not confuse a compression molding compound CMC with a ceramic matrix composite CMC.

For MMC, carbon fibers generally need protection if a titanium matrix is used, as titanium carbide tends to be formed. Nickel coating can be used. For carbon nanotubes coating may not be easy and so possibly an aluminum matrix may be more appropriate.

Aluminum matrix or AMC should be formable (though harder to form than aluminum). Aggressive curvatures which would fracture carbon fibers will do less damage to nanotubes.

Process modeling for MMC will have similar requirements to modeling sheet metal forming. PAM-STAMP or possibly PAM-FORM and LS-Dyna (explicit FE modeling in general) are the sort of tools needed. Variations on these are often used for forming thermoplastic matrix composites. Extensive data on the plastic deformation of the matrix is needed, rheology of the resin in its hot and liquid states for TPMC.

For a thermoset PMC or CMC information is need about the rheology of the resin as it becomes liquid and cures. The implicit solver LUSAS can be used for simple process modeling of PMC.

At present CNT composites use a low fiber volume fraction of CNTs (often two to five percent CNTs) and should be quite formable.

What sort of composite did you have in mind?

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! Already a Member? Login


eBook - 10 Reasons to Choose CATIA on the Cloud
To compete in today’s fast-paced and competitive market, smaller and newer firms need a powerful platform that will enable them to compete with bigger players, without the heavy investments needed in computer hardware, software and personnel. Download Now
White Paper - Smart Manufacturing for Electronics
This white paper describes a transformative approach to electronics manufacturing made possible by the addition of Mentor Graphics to the Siemens family. It describes a completely digitalized strategy that supports both printed circuit board (PCB) and mechanical design and manufacturing, uniting the entire product lifecycle – from idea and production to customers and back. 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:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close