GGSD Program Details for DIANA

DIANA

Category	Numerical analysis (general)
Publisher	TNO DIANA
Platform	UNIX, DEC, IBM, HP, SG, SUN, VAX-VMS
Status	Commercial
Description	DIANA is a multi-purpose 2D and 3D finite element program with applications in soil mechanics, rock mechanics and groundwater flow. Stress elements: plane strain elements and axi-symmetric (quadrilateral, triangular, linear, quadratic, quartic), 3D solid elements (tetrahedra, prisms, hexahedra, linear, quadratic and cubic), beam elements (quadratic, cubic and quartic), plate and shell elements (quadratic and cubic), interface elements (nodal and line for 2D, plane for 3D, linear, quadratic, cubic and quartic), anchor elements. Flow elements: steady state or transient flow and saturated and unsaturated (2D and 3D linear and quadratic), layer elements for 2D regional flow, 1D and 2D boundary elements, 2D interface elements. Plasticity models: Tresca, von Mises, Mohr-Coulomb, Drucker-Prager yield criteria, associated and non-associated plasticity, friction hardening and cohesion softening, drained and undrained elastic and plastic, non-linear elastic, overlay models for hysteresis and cyclic modelling. Interface models: associated and non-associated Coulomb friction, friction hardening and cohesion softening, combined friction with gap formation, discrete cracking with softening and shear transfer, non-linear elastic. Crack models: non-orthogonal multi-directional smeared cracking, discrete cracking in interface elements, tension cut-off, tensile softening, constant and crack width dependent shear retention. Granular material model: non-linear elastic Boyce. Combination non-linear models: temperature dependence, cracking and plasticity, geometrical and physical non-linearity. Initial conditions: initial stress, incorporating linear analysis, OCR, Ko. Different types of iterative and direct matrix inversion procedures. Groundwater flow: horizontal 2.5D multi-layer flow for regional analysis, saturated and unsaturated 2D and 3D flow with seepage faces, linear and non-linear, steady state and transient. Flow stress: staggered flow stress, true coupled flow stress for consolidation analysis, 3 phase modelling including chemical effects and swelling. Fluid structure interaction: potential flow fluid modelling, incompressible Navier-Stokes fluid modelling. Phased analysis: addition/removal of elements, addition/removal of supports and tyings. Pre and post-processor: mesh generation, plotting of total deformations, incremental deformations, stresses, principal stresses, plastic points etc, couples to external pre and post-processors such as FEMGEN/FEMVIEW, Patran and Supertab. Parameter estimation for back analysis and determination of material and geometrical parameters.
Data formats supported	None stated
Supplier in Japan	JIP Techno-Science Corporation (JTS)
Supplier in Netherlands	TNO DIANA BV
Supplier in Norway	Teknisk Data AS
Supplier in Poland	Datacomp Software Systems Application Company
Supplier in United Kingdom	TNO DIANA
Supplier in United Kingdom	Wilde FEA Ltd
Supplier in United States of America	TNO DIANA North America Inc.