Plot > Surface Components > Ferr Failure Error
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Contours the surface failure criterion error. This component can be accessed via the Strength Factor Components toolbar as follows:
This toolbar can be changed to a vertical orientation by dragging is against either the right or left hand edge of the main window. It can be changed back to a horizontal orientation by dragging is against either the top or bottom edge of the main window.
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During matrix solution Map3D is attempting to progressively solve the simultaneous equations saved in the coefficient matrix along with any other equations describing the alternate material zones, fault slip, creep etc. The iterative solver functions by determining the error in the current solution of each simultaneous equation (the surface stress error), then reducing these errors by a process of successive approximations.
A converged solution is assumed to have been obtained when the maximum surface stress error and the maximum failure criterion error are reduced below the user specified stress tolerance STOL
The failure criterion error is only used for non-linear creep analyzes (including fault slip and 3D material non-linearity). This parameter should always be near zero unless some viscosity has been specified and the problem goes non-linear. In this latter case, viscous creep can allow stress states above the failure criterion, thus indicating a lack of static equilibrium.
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