A report presents additional information on the GENOA-PFA computer program, which was described in "Software for Simulating Progressive Fracture in Braided PMCs" (LEW-16845), NASA Tech Briefs, Vol. 24, No. 3 (March 2000), page 52. On the basis of material-property data, finite-element mathematical models, and service conditions, GENOA-PFA simulates the initiation and progression of damage ultimately leading to global structural failures in composite-material structures. The composite materials include complex architectures in which fibers are placed in two- or three-dimensional weaves or braids. Whereas the cited prior article characterized GENOA-PFA as applicable to only polymer-matrix composites, the report characterizes it as applicable to other composite structures also, including ones that contain ceramic or metal matrices.

This work was done by Pappu L. N. Murthy and Christos C. Chamis of Glenn Research Center, Frank Abdi of Alpha Star Corp., and Levon Minnetyan of Clarkson University. To obtain a copy of the report, "GENOA a Progressive Failure Analysis Software System," access the Technical Support Package (TSP) free on-line at www.nasatech.com/tsp  under the Materials category.

Inquiries concerning rights for the commercial use of this invention should be addressed to

NASA Glenn Research Center,
Commercial Technology Office,
Attn: Steve Fedor,
Mail Stop 4 —8,
21000 Brookpark Road,
Cleveland, Ohio 44135.

Refer to LEW-16858.