**lin_to_quad

Description

Use this command to increase the integration order of elements from linear to quadratic. The command always assumes that the mid-side nodes are linearly placed between the corner nodes, so if the linear mesh approximates a curve, the quadratic mesh will in fact model the chord faceted approximation.

Syntax

The command has the following syntax:

**lin_to_quad \(~\,\) [ *elset ] elset-name \(~\,\) [ *no_nset ]

*elset

if specified, only the given elset is set to quadratic. The default is to run on the whole mesh.

*no_nset

if specified, nsets are not modified, and thus only contain nodes from the original linear mesh.

Note

In version 8.3 there is no corresponding alteration of the node sets and boundary sets which might be affected by this increase in order. The user should be careful to remove such unwanted (and in the bset case, invalid) sets by hand using the **remove_set command (see remove_set).

Note

The inverse operation **quad_to_lin, i.e. going from quadratic to linear elements.