ID_SURFACE_SHEAR_STRESS   Plot > Surface Components > τs   Shear Stress

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Contours the maximum shear stress in the plane of the surface.

This component can be accessed via the Strength Factor Components toolbar as follows:

 

clip0309

 

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.

 

Selecting the clip0310 button on the Contours toolbar activates the Surface Components toolbar.

 

clip0312

 

In elastic analysis the maximum in-plane shear stress is normally used with the in-plane normal stress and the Mohr-Coulomb strength criterion to estimate the amount of slip due to over-stressing, on a fault, joint set or bedding plane.

 

By contrast, in non-linear analysis the maximum in-plane shear stress can never exceed the strength unless some creep is used. In this latter case, viscous creep can allow stress states above the failure criterion, thus indicating a lack of static equilibrium. Hence for non-linear analysis one normally directly considers the amount of slip predicted by the model

 

Mohr-Coulomb in DD planes

 

Fault-Gouge in DD planes

 

Backfill-Hyperbolic in DD planes

 

The contour range is set using

 

ID_RANGE Plot > Range

 

This component can be added to the contour toolbar if desired

 

ID_VIEW_BAR_OPTIONS Tools > Configure Contouring Toolbar

 

Related Topics:

 

ID_SURFACE_NORMAL_STRESS Plot > Surface Components > Sn Normal Stress

ID_SURFACE_EXCESS_SHEAR Plot > Surface Components > dTs - Excess Shear Stress

ID_SURFACE_INCREMENTAL_STRAIN Plot > Surface Components > dEs - Incremental Shear Strain

ID_SURFACE_SHEAR_STRAIN Plot > Surface Components > Es - Shear Strain

ID_SURFACE_SHEAR_DISPLACEMENT Plot > Surface Components > ds - Shear Displacement (Ride)