NASA 4750 Manual

A SERVICE OF

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ANALYTICAL METHODS FOR TEXTILE COMPOSITES

8-4

- Convergence of stresses is slow as the number of elements is increased when

heterogeneous elements are used.

- Some inconvenience results from the code needing point-by-point yarn path and

cross-section data as input. As a practical matter, this is preferably obtained from

another code or solid modeler.

- The assumptions that cross-sections are constant and yarn paths lie in a single

plane prevent the code from being used for some textile forms, such as 3D braids.

- The code is computationally intensive. If computational speed was important, the

code would at least be useful for generating reference solutions for comparison to

faster, simpler approaches.