Version 3.0 of the Boundary Element Solutions Technology Composite Modeling System (BESTCMS 3.0) is an advanced engineering software system for the microanalysis of fiber composite structures. BESTCMS is based on the BEST3D boundary-element program (COSMIC program LEW-15351). BESTCMS affords capabilities for analyses of elastostatic behavior, steady-state and transient heat transfer, steady-state and transient concurrent thermoelasticity, elastoplasticity, and creep.

In BESTCMS, the fibers can be assumed to be perfectly bonded to the matrix in a composite material; alternatively, in static or steady-state analysis, one can assume that there are spring connections, thermal resistances, and/or frictional sliding between the fibers and the matrix.

BESTCMS is written in FORTRAN 77 to be machine-independent across UNIX platforms. BESTCMS has been successfully implemented on the following computers and operating systems: SUN 4 IPC running Solaris 2.4 (SunOS 5.4), SGI IRIS Indigo2 running IRIX 6.2, HP 9000/720 running HP-UX A.09.01, and IBM RS/6000 running AIX 4. For efficient execution, BESTCMS requires a minimum of 8MB of random-access memory; for efficient execution in cases of practical three-dimensional problems, 300MB of temporary disk storage capacity is recommended. The standard distribution medium for BESTCMS is one 4-mm DAT cartridge in UNIX tar format. Alternate distribution media are available upon request. BESTCMS 3.0 was released to COSMIC in 1997.

This work was done by D. A. Hopkins of Lewis Research Centerand P.K. Banerjee and D.P. Henry of the State University of New York at Buffalo. For further information, access the Technical Support Package (TSP) free on-line at under the Computer Software category,or circle no. 152 on the TSP Order Card in this issue to receive a copy by mail ($5 charge).


NASA Tech Briefs Magazine

This article first appeared in the March, 1998 issue of NASA Tech Briefs Magazine.

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