GGSD Program Details for PENTAGON-2D

PENTAGON-2D

Category	Numerical analysis (soil)
Publisher	Emerald Soft
Platform	Win95/98, WinNT
Status	Commercial
Description	PENTAGON-2D is a finite element analysis program for 2D continuum problems including tunnels, earth retaining structures, general structures, seepage flow and coupling problems. It has the feature of considering the staged construction in any form and in any sequence. Most state variables and stiffness coefficients are 8 byte real numbers: this means that the composite materials of quite different stiffnesses(1E7 times) can be modeled without any convergence trouble. It contains various elements such as plane strain (3, 4, 6, 8 nodes), interface, frame (2 nodes), truss (2 nodes) and spring (2 nodes) elements. Models of about 5,600 nodes can be solved in 0.5 Mbyte RAM when the frontal solver is used. Models: linear-elastic, Mohr-Coulomb, transversely isotropic, hyperbolic(loading-unloading-reloading) and smeared crack models are available to model soil, rock, concrete and other various construction materials. The plane strain, truss and spring elements have compressive and tensile strength. Available load conditions are point load, surface pressure, body force, prestress, and distributed residual force. Any type of element can be added, removed and changed at any construction stage and seepage stage. Seepage analysis is available as the excavation and embankment stages process. Steady-state Darcy flow is available for confined/unconfined flow, saturated/unsaturated flow. Seepage boundary conditions such as head difference, pumping, evaporation and precipitation are available for the different construction stages. The hydraulic gradient can be coupled with the mechanics as the form of seepage force. The preprocessor produces the finite element geometry and the whole input data including the construction stages such as element addition/removal, boundary conditions and load. The postprocessor displays the graphical results as vector and contour plots in a GUI environment. The graphic results can be produced as wmf, Postscript and Auto-CAD plt formats.
Data formats supported	Images : Windows metafile Printer : Encapsulated postscript
Supplier in South Korea	Emerald Soft