NLDPOST

NLDPOST, Label, Key, FileID, Prefix
Gets element component information from nonlinear diagnostic files.

Valid Products: Pro | Premium | Enterprise | PrepPost | Solver | AS add-on

Label

Specifies the type of command operation:

EFLG

 — 

Element flag for nonlinear diagnostics.

NRRE

 — 

Newton-Raphson residuals.

Key

Specifies the command action:

STAT

 — 

List information about the diagnostic files (Jobname.ndxxx or Jobname.nrxxx) in the current directory.

For Label = EFLG, the listing gives a summary that associates the loadstep, substep, time, equilibrium iteration number, cumulative iteration number, and the number of elements that fail each criteria with a specific file ID (Jobname.ndxxx). Use the list to create element components (via the CM option) based on the cumulative iteration number.

For Label = NRRE, the listing provides a summary that associates the loadstep, substep, time, equilibrium iteration number, and cumulative iteration number with a specific file ID (Jobname.nrxxx). Use the list to identify the respective file ID for creating Newton-Raphson residual contour plots (PLNSOL,NRRE,…,FileID).

DEL

 — 

Delete Jobname.ndxxx or Jobname.nrxxx files in the working directory, if any exist.

CM

 — 

Create components for elements that violate criteria. This value is valid only when Label = EFLG.

FileID

Valid only when Label = EFLG and Key = CM, this value specifies file IDs:

IDnum

 — 

The file ID number. Creates the element components from the diagnostic files corresponding to the specified file ID number in the working directory.

ALL

 — 

Creates element components from all available diagnostic files residing in the working directory. This value is the default if you do not specify an IDnum value.

Prefix

Sets the prefix name for components. Specify up to 21 alphanumeric characters.

Command Default

The NLDPOST command returns no nonlinear diagnostic information.

Notes

Based on the nonlinear diagnostic results (created via the NLDIAG,EFLG command), the NLDPOST command creates element components with predefined names.

The following table lists the diagnostic criteria and component names (with specified prefix and without). Here xxx corresponds to the file ID (FileID) of Jobname.ndxxx or Jobname.nrxxx.

Elements with:If prefix is specified:Without prefix specified:
Too large a plastic strain increment
prefix_xxx_eppl
ndxxx_eppl
Too large a creep strain increment
prefix_xxx_epcr
ndxxx_epcr
ndxxx_ephy
ndxxx_epcz
ndxxx_epdm
Too much distortion
prefix_xxx_hdst
ndxxx_hdst
ndxxx_rdsp
Unsatisfied mixed u-P constraints
prefix_xxx_mxup
ndxxx_mxup
Unconverged MPC184 multipoint constraint elements
prefix_xxx_184j
ndxxx_184j
Negative/small pivots
prefix_xxx_pivt
ndxxx_pivt

If you have trouble viewing specific element components, see Viewing Hidden Element Components in the Basic Analysis Guide.

For more information, see Performing Nonlinear Diagnostics.

Menu Paths

Main Menu>General Postproc>Nonlinear Diagnostics