T2067

T2067 WARNING: T2067 VALUE OF PARAMETER F12 DOES NOT SATISFY STABILITY CRITERION
Cause: The non-zero value of the Tsai-Wu interaction term F12 specified on a MAT8 Bulk Data entry does not satisfy the stability criterion.

A zero F12 value will be used in the analysis.

Action: Correct the specified F12 value.
Remarks: See Autodesk Nastran Reference Guide, Section 4, Bulk Data, for entry format.