Mechanical APDL Structural Analysis Guide

or modify base elements after generating the reinforcing elements, remove all affected reinforcing
elements and reissue the EREINF command to avoid inconsistencies.

The EREINF command determines the reinforcing element type according to the base element type
and the current reinforcing section. (See the example input files in Example: Discrete Reinforcing (p. 471)
and Example: Smeared Reinforcing (p. 472).) The command does not create any new reinforcing elements
if the current section is not a valid reinforcing section or if the section is incompatible with the base
elements. To define a section ID to associate with the subsequently-defined reinforcing elements, issue
the SECNUM command.

Reinforcing locations are given with respect to the base element. Unexpected reinforcing placement
may result from incorrectly oriented base elements. You can achieve the desired base element orientation
via the EORIENT or VEORIENT command. In some cases, you may need to create different reinforcing
sections for different base elements with inconsistent orientations.

As shown in the example input in Example: Discrete Reinforcing (p. 471) and Example: Smeared Reinfor-
cing (p. 472), you can manually adjust the translucency of the base elements to show the reinforcing
elements. Additional automatic reinforcing display options are available via the ANSYS GUI (Main Menu>
Preprocessor> Sections> Reinforcing> Display Options).

17.3.1. Example: Discrete Reinforcing

Following is typical sequence of commands for defining discrete reinforcing elements:

/batch,list

/show, sample,grph

/title, Sample input data for generating discrete reinforcing elements

/prep7

!

! Define material properties

!

mp, ex,1,10e6! Base Material

mp, ex,2,30e6! Reinforcing Material

mp,prxy,1,.3

mp,prxy,2,.3

mp,dens,1,.00001

mp,dens,2,.00002

!

! Define base geometry

!

k,1, 0.,0.

k,2,10.,0.

l,1,2

!

! Define base elements

!

et,1,BEAM188

mat,1

sect,1,BEAM,I

secd,1.,1.,1.,0.2,0.2,0.3

esize, 2.0

lmesh, 1

!

! Define discrete reinforcing section

!

sect,2,REINF,DISC

secd,2,0.01,BEAM,-0.25,0.1

secd,2,0.01,BEAM, 0 .0,0.1

secd,2,0.01,BEAM, 0.25,0.1

secd,2,0.01,BEAM,-0.25,0.9

secd,2,0.01,BEAM, 0 .0,0.9

secd,2,0.01,BEAM, 0.25,0.9

!

! Create reinforcing element via EREINF

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Defining Reinforcing Sections and Elements