6.3 Crack Bandwidth

For the concrete plasticity model [§5.1.3], the anisotropic Rankine-Hill plasticity model [§5.2.3], the Smeared Cracking model [§6.1], and the Total Strain crack models [§6.2] DIANA assumes a default for the crack bandwidth h . For linear two-dimensional elements this is h = $\sqrt{{ 2 A }}$ , for higher order two-dimensional elements h = $\sqrt{{ A }}$ with A is the total area of the element. For solid elements the default is $\sqrt[3]{{ V }}$ with V is the volume of the element. For truss, plane strain, and axisymmetric elements the default is 1. For beam elements the default is the length of the element, calculated as V/$\bar{{A}}$ with V is the volume of the element and $\bar{{A}}$ is the average cross-sectional area of the beam. To guide the cracking algorithm, you may overrule this default value via an additional material data item.

    (syntax)

CRACKB

h is the crack bandwidth h .