Download getting started with crisp2d

GETTING STARTED WITH CRISP2D
Element Type
Before you can start creating a mesh, you need to specify whether or not you intend to use cubic strain
triangles (which cannot be mixed with any other type of element).
This region contains the following fields:
Cubic Strain Triangles Only (option button)
By selecting this option you will only be able to create triangular, cubic
strain finite elements.
All Other Elements (option button)
By selecting this option you will be able to create finite elements of any
type other than cubic strain triangles.
Iteration
Before you can start creating a mesh, you need to specify whether or not you intend to use iterative solution
methods.
This region contains the following fields:
None (option button)
By selecting this option, no iterative techniques will be used during your
analysis.
Apply Out of Balance Loads In Next Increment (check box)
See Sections 7.10 and 8.2 in
the Technical Reference
Guide for further
information about applying
stress correcting loads
By checking this box you can force the analysis program to add any out-of-balance loads
arising at the end of the current increment block to the loads applied in the next increment.
If you intend to use elastic perfectly plastic soil models, you should check this box,
otherwise leave it unchecked.
MNR – Displacement Method (option button)
See Sections 7.10 and 8.2 in
the Technical Reference
Guide for further
information about the MNR
– Displacement Method
By checking this box, you can force the program to use a Modified Newton-Raphson
method. This is an iterative solution technique which helps to eliminate the out-of-balance
forces within each increment.
It can be used with all soil models but will have no effect on any of the Critical State models
MNR – Displacement Parameters
This section will be greyed out unless the MNR – Displacement Method button is on. If this has
been selected, you need to define the following two parameters:
Tolerance (numeric text box)
This sets the limits at which the solution is assumed to converge. Once this limit has been
reached, the program will carry on with the next increment.
A typical value is 0.01.
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