GPSTRAIN

I/O Options and Subcase Information Entry

GPSTRAIN - Output Request

Description

The GPSTRAIN command can be used in the I/O Options or Subcase Information sections to request grid point strain output for all or individual subcases, respectively.

Format

GPSTRAIN (format_list, averaging, type, extras) = option

Argument	Options	Description
format	<HM, H3D, PUNCH, OP2, blank> Default = blank	HM:	Results are output in HyperMesh results format (.res file).
		H3D:	Results are output in Hyper3D format (.h3d file).
		PUNCH:	Results are output in Nastran punch results format (.pch file).
		OP2:	Results are output in Nastran output2 format (.op2 file) (Comment 8).
		blank:	Results are output in all active formats for which the result is available.

averaging	<GLOBAL, BYPROP, blank> Default = BYPROP	GLOBAL:	Only the globally averaged GPSTRAIN results are output.
averaging	<GLOBAL, BYPROP, blank> Default = BYPROP	BYPROP, blank:	Both the globally averaged GPSTRAIN results and the GPSTRAIN results averaged by property for each property are output.

type	<VON, PRINC, MAXS, SHEAR, ALL, TENSOR, DIRECT> Default = ALL	VON:	Only von Mises Strain results are output.
		PRINC, MAXS, SHEAR:	von Mises and maximum principal strain results are output.
		ALL, blank:	All strain results are output.
		TENSOR:	All strain results are output. Tensor format is used for H3D output.
		DIRECT:	All strain results are output. Direct format is used for H3D output.

extras	<PLASTIC> No default	PLASTIC:	Output Plastic strain (in addition to total strain). This output is only available for H3D format.

option	<YES, ALL, NO, NONE, SID> Default = ALL	YES, ALL, blank:	Grid point strains output for all elements.
		NO, NONE:	Grid point strains are not output.
		SID:	If a set ID is given, grid point strains are output only for nodes listed in that set.

Comments

1.	When a GPSTRAIN command is not present, grid point strains are not output.

2.	Grid point strains are only available for solid elements, additionally GPSTRAIN is currently only supported for Static Analysis.

3.	Grid point strains are not available for elements which form part of a topology design space. When an analysis only run is performed, grid point strains are available for all solid elements. When PARAM, REANAL is used, grid point strains contributions are only calculated for fully dense elements.

Multiple formats are allowed on the same entry; these should be comma separated. If a format is not specified, this output control applies to all formats defined by the OUTPUT command, for which the result is available. See Results Output for information on which results are available in which formats.

5.	Multiple instances of this card are allowed; if instances are conflicting, the last instance dominates.

6.	For optimization, the frequency of output to a given format is controlled by the I/O option OUTPUT.

7.	Grid point strains are output for the entire model and for each individual PSOLID component. This allows grid point strains to be accurately obtained at the interface of two components referencing different material definitions.

8.	format=OUTPUT2 can also be used to request results to be output in the Nastran output2 format (.op2 file).