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8.32 Surfaces - Strains - Bach

To control the graphical display of surface strains available with the equivalent stress hypothesis according to Bach, select Surfaces → Strains in the Results navigator (see Figure 8.63). Table 4.32 shows these strains in numerical form.

Image 8.67 Table 4.32 Surfaces - Strains - Bach

The Grid Point and Grid Point Coordinates table columns correspond to those of results table 4.29 Surfaces - Strains - von Mises.

In the approach according to Bach, it is assumed that failure occurs in the direction of the maximum strain (see Chapter 8.25).

The strains according to Bach are determined as follows:

Table 8.25 Strains according to Bach


Maximum absolute value of the principal strain ε1+ or ε2+ on the positive side of the surface (see Chapter 8.27).


Maximum absolute value of the principal strain ε1- or ε2- on the negative side of the surface (i.e. side in opposite direction of positive surface axis z)


Maximum equivalent strain on the positive or negative side of the surface (columns E and F)