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SUMMARY OF AVAILABLE CODES
8-5
8.2
µ
Tex-20
Authors
: Ramesh V. Marrey and Bhavani V. Sankar
References:
B.V. Sankarand R.V. Marrey, “Micromechanical Models for Textile Composites,”
to be published in the Proceedings of the Mechanics of Textile Composites
Conference, Dec. 6-8, 1994, Hampton Va.
User
Manual
:
User Manual for
µ
Tex-10 and
µ
Tex-20. Includes well documented description of
input and output; instructions for compiling on different computers; limited
discussion of theory.
Format:
FORTRAN code which can be recompiled for various target machines. A parameter
file is provided for changing the maximum problem size.
Geometric
Model:
User must provide a series of points describing the locus of the center of each yarn.
An additional set of points must be provided to define the cross-section of each yarn
in terms of an n-sided polygon. The yarn path is assumed to lie in a single plane,
which can be rotated to an arbitrary orientation. Multiple yarn paths can be defined
to generate various textile forms. Fiber volume fraction is computed from the given
geometry.
Stiffness
Model:
Implements a procedure called the Selective Averaging Method. The unit cell is
discretized into slices normal to the load direction or parallel to the plane of shear.
Slices are further divided into elements that are somewhat smaller than the yarn
diameter. A combination of isostrain and isostress assumptions is used to determine
an average stiffness of the slices and thence of the unit cell. Periodicity is not
enforced.