Progressive failure of woven polymer-based composites under dynamic loading; Theory and analytical simulation
by Hufner, David Robert, Ph.D., UNIVERSITY OF CONNECTICUT, 2008, 209 pages; 3308233

Abstract:

Woven polymer-based composites are currently used in a wide range of naval applications. Use of composite materials in critical applications requires that dynamic material behavior be fully characterized. Composite material behavior is generally well understood in the linear regime, and can be predicted with sufficient confidence up to the point of first ply failure. However, the mechanical behavior beyond first ply failure is not characterized by a validated theory that can account for material nonlinearity, strain rate dependence, and progressive failure. The objective of this work is to develop and validate a progressive failure approach that can be used for woven polymer-based composites subjected to dynamic loads. The theory is implemented in a commercial finite element program with a user material subroutine that defines the constitutive theory and implements the progressive failure methodology. A deformation based failure criterion, intended for large strain analysis of woven composites, is also proposed. The progressive failure approach is validated using basic tension and open hole tension tests. The tests are performed using digital image correlation, which provides the complete non-uniform strain and displacement fields. The simulation results are in good agreement with experimental data.

 
Advisor
SchoolUNIVERSITY OF CONNECTICUT
SourceDAI/B 69-03, p. , Jun 2008
Source TypeDissertation
SubjectsAerospace engineering; Mechanical engineering; Materials Science
Publication Number3308233
Adobe PDF Access the complete dissertation:
 

» Find an electronic copy at your library.
  Use the link below to access a full citation record of this graduate work:
  http://gateway.proquest.com/openurl%3furl_ver=Z39.88-2004%26res_dat=xri:pqdiss%26rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation%26rft_dat=xri:pqdiss:3308233
  If your library subscribes to the ProQuest Dissertations & Theses (PQDT) database, you may be entitled to a free electronic version of this graduate work. If not, you will have the option to purchase one, and access a 24 page preview for free (if available).

About ProQuest Dissertations & Theses
With over 2.3 million records, the ProQuest Dissertations & Theses (PQDT) database is the most comprehensive collection of dissertations and theses in the world. It is the database of record for graduate research.

The database includes citations of graduate works ranging from the first U.S. dissertation, accepted in 1861, to those accepted as recently as last semester. Of the 2.3 million graduate works included in the database, ProQuest offers more than 1.9 million in full text formats. Of those, over 860,000 are available in PDF format. More than 60,000 dissertations and theses are added to the database each year.

If you have questions, please feel free to visit the ProQuest Web site - http://www.proquest.com - or call ProQuest Hotline Customer Support at 1-800-521-3042.