WARNING [4026]: STIFFNESS MATRIX IS NOT POSITIVE DEFINITE IN PRE-STRESSED LINEAR STATIC ANALYSIS

Cause

This warning is generated when the system stiffness matrix does not retain positive definite properties in prestressed linear static analysis.

Analysis Type

Prestressed analysis

Related Menu

None

Remedy

This warning occurs if the system stiffness matrix is not structurally stable due to the effects of the geometric stiffness by the initial stress.  Depending on the intent, the user may adjust the initial stress or continue the analysis at the present state.