6.4. Limitations of Draping Simulations

The draping simulation approach has the following limitations:

  • The surfaces to be draped must be smooth. No sharp edges are allowed.

  • The draping procedure does not change mechanical properties of the ply by default. However, mechanical properties can be altered if a shear-dependent material is defined. For more information, see Variable Material Data in Composite Analyses in the ACP User's Guide.

  • Draping parameters, such as mesh size and seed point, will significantly effect the draping results. Be sure to verify the results carefully.

  • Ply thickness does not automatically change as a result of a draping procedure. A thickness correction can, however, be activated in the modeling ply properties.

  • It is assumed that fabric transverse direction is initially perpendicular to the principal direction 1.

  • The fiber slippage is a phenomenon that takes place after the locking limit and is noticeable only at relatively high deformation levels. The fiber slippage is not considered in this draping approach.

  • It is known that some geometries can lead to flawed or deficient results, for example draping across a complete cylinder. This issue can be rectified by subdivision of the draping geometry.