`block.field.quantity`

Syntax

- s = block.field.quantity()
- block.field.quantity() = s
Get/set the scalar quantity to retrieve when the value being obtained is a tensor. This value is ignored if the type is not a tensor. The available quantity names are listed in the following table.

Quantity Name Description intermediate intermediate principal stress maximum the maximum (most positive) value of principal stress (note that compressive stresses are negative in 3DEC) mean the mean pressure value defined as the trace of the tensor divided by 3. For stresses this is most often referred to as the pressure. minimum the minimum (most negative) principal stress (note that compressive stresses are negative in 3DEC) norm The norm of the strain rate; see the equations below octahedral octahedral stress; see the equations below shear-maximum maximum shear stress total-measure distance of tensor value to the origin in principal space volumetric volumetric change or trace von-mises Von Mises measure; see the equations below xx \(xx\)-component of the tensor xy \(xy\)-component of the tensor xz \(xz\)-component of the tensor yy \(yy\)-component of the tensor yz \(yz\)-component of the tensor zz \(zz\)-component of the tensor Returns: s - the name of the scalar quantity to retrieve from the tensor Accepts: s - the name of the scalar quantity to retrieve from the tensor. Keyword matching rules are used. If no match is found, an error occurs. Quantity Name Stress Strain Increment Strain Rate norm \(\sqrt{\sigma_{kk}}\) \(\sqrt{{\epsilon^i}_{kk}}\) \(\sqrt{{\epsilon^r}_{kk}}\) octahedral \(\sqrt{{2 \over 3} J_2}\) \(\sqrt{{8 \over 3} J^i_2}\) \(\sqrt{{8 \over 3} J^r_2}\) von-mises \(\sqrt{3J_2}\) \(\sqrt{{4 \over 3} J^i_2}\) \(\sqrt{{4 \over 3} J^r_2}\) [ZC: please review equations above]

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