4.8.3.60. GET_RFLEX_NSTRAIN_3NREF

The GET_RFLEX_NSTRAIN_3NREF subroutine returns the nodal strain. GET_RFLEX_ NSTRAIN_3NREF is an auxiliary subroutine for MODAL_FORCE or MODAL_FORCE_EXT.

The difference between GET_RFLEX_NSTRAIN and GET_RFLEX_NSTRAIN_3NREF is the definition of output reference frame. The output reference frame of GET_RFLEX_NSTRAIN subroutine uses a marker. The output reference frame of GET_RFLEX_NSTRAIN_3NREF is defined 3 refernce nodes like Fig 1.

Table 4.165 Function Name
Language type	Subroutine
FORTRAN	call get_rflex_nstrain_3nref(ifbody, NodeSqeId, fTopBot, refnode1, refnode2, refnode3, strain, errflg)
C/C++	get_rflex_nstrain_3nref(ifbody, NodeSeqId, fTopBot, refnode1, refnode2, refnode3, strain, &errflg))

../_images/image2753.png — Figure 4.121 Definition of 3 nodal point reference frame

Table 4.166 Parameter information
Variable Name	Size	Description
ifbody	int	Sequential id of RFlex body defined in RecurDyn/Solver.
NodeSeqId	int	Node sequential id defined in RecurDyn/Solver. A node id should be converted to the node sequential id using the GET_RFLEX_NODESEQID auxiliary function.
fTopBot	int	If the RFI file has shell type element and all surface types (Top and Bottom) of the strain shapes, then this argument is referred. 1: Top, 2: Bottom
refnode1	int	1^st Reference Node Seq. ID
refnode2	int	2^nd Reference Node Seq. ID
refnode3	int	3^rd Reference Node Seq. ID
strain	double[11]	1~6^th data : Strain tensor (Exx,Eyy,Ezz,Exy,Eyz,Ezx) 7~9^th data : Principal strain 10^th data : Intensity strain 11^th data : Von-mises strain
Errflg	int	Error flag. If the result of this argument is -1 (means TRUE in Fortran logical value), there is no error. The others mean that there is an error.

Code Example

Refer to GET_RFLEX_NSTRAIN.