Full Content is available to subscribers

Subscribe/Learn More  >

Double Diaphragm Forming of a Discontinuous Advanced Composite Prepreg Material: Process Development and Material Modeling

[+] Author Affiliations
Christopher Munro, Daniel Walczyk, George Dvorak

Rensselaer Polytechnic Institute

Paper No. IMECE2005-82523, pp. 349-357; 9 pages
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Manufacturing Engineering and Materials Handling, Parts A and B
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Manufacturing Engineering Division and Materials Handling Division
  • ISBN: 0-7918-4223-1 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME


Due to their superior strength-to-weight ratios, advanced composite parts are increasingly being used by the aircraft industry. This industry is constantly looking for less costly, faster, and more reliable methods to produce advanced composite parts, while still maintaining the very high safety and reliability standards required. This paper describes a new SBCF (Stretch Broken Carbon Fiber) material being developed by Hexcel Corporation for use in forming of aerospace parts. The SBCF material is a discontinuous aligned fiber prepreg material that comes in unidirectional and woven forms. If commercialized, the SBCF material will expand the range of parts that can be formed using a double diaphragm forming (DDF) process. This paper also discusses the FEM modeling of the DDF process for the purposes of predicting part defects. Having defect prediction capabilities will reduce the time and money required to determine if a part can be formed using the SBCF material and DDF. A rudimentary orthotropic-viscoelastic model is developed for the SBCF material to be used in forming simulations being developed concurrently. Model parameters are derived from force-to-stretch (i.e. tensile tests run at a constant displacement rate) and relaxation experiments. A simple model for the diaphragm is developed and preliminary forming simulations are built. Early simulations include forming over hemi-ellipsoid and curved c-channel shapes.

Copyright © 2005 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In