INTRODUCTION
models presented are available over the internet. All codes have been compiled on a Unix
platform and verified to perform as claimed in at least a few representative cases.
Throughout the handbook, the names of codes are printed in UPPER CASE
BOLD TYPE.
1.3 Historical Origins
Many of the models presented were developed by the Textiles Working Group
within the Advanced Composites Technology (ACT) Program sponsored by NASA
Langley Research Center. This research was conducted over a period of five years ending
in 1994 by about a dozen groups in universities and industry.
Other key models and computer codes have also been included to ensure that the
handbook’s scope is representative of the growing population of models in the modern
literature.
At least some of the models have had the advantage of being conceived in the midst
of vigorous experimental programs, in which stiffness, strength, and damage mechanisms
have been studied extensively, by which it might be hoped that they are more realistic than
models formulated on entirely theoretical grounds.
The ACT program has also funded the writing of this first edition of the handbook.
1.4 Internet Access
This report is also available in electronic format from the Langley Technical Report
Server (LTRS) using the Uniform Resource Locator (URL):
http://techreports.larc.nasa.gov/ltrs.
Instructions for accessing source codes and user’s guides for programs described in this
handbook is available at:
http://coins.larc.nasa.gov
Refer to NASA Contractor Report No. CR-4750.
