Week 4-1D Element Creation Challenge

ONE DIMENSIONAL ELEMENT CREATION IN AN PARALLEL BRACKET

OBJECTIVE :

• To mesh the parallel bracket with the size of 5 units.
• To create 1D elements such as Bar, Rod and Beam in the parallel bracket with given cross section and DOF.
• To apply the mass of the magnitude.
• To join the two components with spring elements.

DATA BASE :

SOFTWARE USED :

Preprocessing software - Hyperworks Desktop 2022

PROCEDURAL STEPS :

PART 1 : MESHING OF AN PARALLEL BRACKET

STEP 1A : IMPORT THE MODEL

» Imported the .IGS file of parallel bracket in Hyperworks.

» File > import > Geometry > select IGS file of bracket , then imported it.

CAD model of an parallel Bracket

STEP 1B : EXTRACT MIDSURAFCE OF AN MODEL.

» In main menu page selected the Geometry option , then slected the midsurface tool.

Main menu page > Geomtery > midsurface > select the surface of the one part of the bracket.

> automidsurface > then extracted theMidsurafce.

» Model tree > selected the extracted midsurface renamed as a bracket _1 and change the color also.

Midsurface created on the Bracket_1

» Model tree > selected the Component options right click to create new component renamed as bracket_2 and change

the color also.

» Main menu page > Geomtery > midsurface > select the surface of the bracket _2.

> automidsurface > then extracted the Midsurface .

Midsurface created on the Bracket_2

» then deleted the solids by Delete option > select solid > delete entity .

and also deleted the bracket solids in model tress > componenet > selected the two solid body of an bracket.

» lets move the midsurface to the bracket_2

Mainmenu > tool > organize > click collectors and set the destination component as bracket_2

then selected the midsurafce of an bracket_2. Then moved it.

» Then deleted the midsurface in componenet options iof the model tree.

Midsurafces of the bracket_1 & bracket_2

STEP 1C : ASSIGNING MATERIALS AND PROPERTIES TO THE MIDSURFACE OF AN PARALLEL BRACKET.

» In model tree do right click to create material named as steel.

» Then created two new properties for 2 parallel brackets in model tree.because it has 2 different thickness.

Created properties of the bracket_1& bracket_2

» Now do to assigning newly created properties to the midsurface.

» Set the thickness value of the bracket_1 = 2 mm and card image as PSHELL in bracket_1 property in model tree.

Same as set set the thickness value of the bracket_2 = 2.5 mm and card image as PSHELL in bracket_2 property.

Set the thickness and card image as properties of bracket_1& bracket_2

» Then go to the componenets in model tree selected the bracket_1 component to set the assigned the bracket _1 property.

Same as selected the bracket_2 component to set the assigned the bracket _2 property.

Assigned the bracket_1 &bracket_2 properties

STEP 1D : AUTOMESHING OF AN PARALLEL BRACKET.

STEP 1D1 : AUTOCLEANUP OF THE MIDSURFACES OF AN PARALLEL BRACKET.

» Before go the meshing process, lets do the autocleanup of the midsurafces.

» By using "autocleanup option " to allows clean up the midsurface by its merging vertices which are very close

to each other into a single vertex and then its automatically creates the washer splits.

» Before, execute into autoclean, have to edit the "edit criteria' and "edit parameter" for changing a some meshing

target element size.

» Main menu > Geometry > Autocleanup > edit criteria - to set target element size = 5 units.

Main menu > Geometry > Autocleanup > edit parameter > basic > mesh options > target element size = 5 units.

Washer split created after autocleanup

STEP 1D2 : AUTOMESH OF THE MIDSURFACE OF AN PARALLEL BRACKET.

» Mainmenu > 2D > automesh > slected the all surfaces by surface displayed option

» Set the target element size = 5 units ,and mesh type = mixed.

» Proper mesh flow was achieved near washer split.

Proper meshflow of an parallel bracket

PART 2 : 1D ELEMENT CREATION IN THE FE OF AN PARALLEL BRACKET.

STEP 2 : Creation of rod element between bracket1 [a] hole and bracket2 [a] hole.

» Firstly creation of RBE2 cluster links in bracket 1 [a] hole and bracket 2 [a] hole.

» Mainmenu 1D > rigids > independent (Calculate node) > dependent (Multiple node) > by paths > select
Translational dof 1, dof 2, dof3 > Create.

» Cluster RBE2 links created in bracket 1 [a] hole and bracket 2 [a] hole with Translational DOF only.

Cluster RBE2 links created between parallel brackets

» Now to create Rod we have to follow some steps.

» 1D > Hyper beam > standard section > thinwalled box > create > Assign with given dimensions also renamed as Rod.

Assigned the cross section of the ROD

» Now to apply property for the rod.

» Go to model tree > Right click > property > Rename to ROD > Change card image to PROD >

& change Material to Steel > BEAM Section > ROD

Applied Properties to the ROD

» Now for creating ROD location we have to follow some steps.

1D > Rods >select bracket1 node and bracket2 node in the holes[a]. > Element type CROD > Created it.

Created ROD location between parallel bracket

» Now update the 1D element.

1D > rods > update > property = ROD > update.

» To see the ROD we have to go 1D Detailed Element Representation.

STEP 3 : Creation of beam element between bracket1 [b] hole and bracket2 [b] hole.

» Firstly creation of RBE3 cluster links in bracket 1 [b] hole and bracket 2 [b] hole.

» Mainmenu 1D > rigids > independent (Calculate node) > dependent (Multiple node) > by paths > select
Translational dof1, dof2, dof3 and rotational dof4,dof5 ,dof 6 > Create.

» Cluster RBE3 links created in bracket 1 [a] hole and bracket 2 [a] hole with rotational and translational DOF.

Cluster RBE3 links created between parallel brackets

» Now to create beam we have to follow some steps.

» 1D > Hyper beam > standard section >standard I section > Create > Assigned with given dimensions and Renamed as a Beam.

Assigned the cross section of the BEAM

» Now to apply property for the beam.

» Go to model tree > Right click > property > Rename to BEAM > Change card image to PBEAM

> change Material to Steel > BEAM Section > BEAM.

Applied Properties to the BEAM

» Now give location for BEAM.

» 1D > Rods >selected bracket1 node in the hole[b] and bracket2 node in the hole[b] > Element type CBEAM.

Created BEAM location between parallel bracket

» Now update the 1D element.

» 1D > rods > update > property = BEAM

> BEAM Section > BEAM.

> Element type =CBEAM.

» To see the BEAM we have to go 1D Detailed Element Representation

STEP 4 : Creation of ROD element between bracket1 [C] hole and bracket2 [C] hole.

» Firstly creation of RBE3 cluster links in bracket 1 [a] hole and bracket 2 [a] hole.

» Mainmenu 1D > RBE3 > independent (Calculate node) > dependent (Multiple node) > by paths > selected
Translational dof 1, dof 2 and rotational dof 4, dof5 > Create.

» Cluster RBE3 links created in bracket 1 [a] hole and bracket 2 [a] hole with translational X & Y DOF and rotational X &Y DOF.

Cluster RBE2 links created between parallel brackets

» Now to create Bar we have to follow some steps.

» 1D > Hyper beam > > Standard Section library (OPTISTRUCT) > Standard section type (CROSS) > Created it.

> Assigned with given dimensions and renamed as a BAR.

Assigned the cross section of the BAR

» Now to apply property for the BAR.

» Go to model tree > Right click > property > Rename to BAR > Change card image to PBAR

> change Material to Steel > BEAM Section > BAR.

Applied Properties to the BAR

» Now give location for BAR.

» 1D > Bars >selected bracket1 node in the hole[b] and bracket2 node in the hole[b] > Element type CBAR.

Created BAR location between parallel bracket

» Now update the 1D element.

» 1D > BARS > update > property = BAR.

> Element type =CBAR.

» To see the BAR we have to go 1D Detailed Element Representation.

STEP 5 : Apply the mass of magnitude in bracket1 [d,e] holes and bracket2 [d,e] holes.

» First of all creation of RBE2 links in bracket1 [d,e] holes and bracket2 [d,e] holes.

» Mainmenu >1D > rigids > independent (Calculate node) > dependent (Multiple node) > by paths >

selected all DOF > Create.

» Cluster RBE2 links created in bracket 1 [d,e] hole and bracket 2 [d,e] hole with all DOF.

» Mainmenu > 1D > masses > MASS = 10 > Element type (CMASS1) > Selected the RBE2 Links.

Applied mass of the magnitude between parallel brackets

STEP 6 : Joining the bracket1 and bracket2 with spring element.

» Before that we will create REB2 cluster links in both side of gap F.

» Mainmenu >1D > Rigids > independent (Calculate node) > dependent (Multiple node) > by paths > Created it.

» To create Spring element on both side of gap F.

» 1D > springs > element type HMSPRING > Select the node both side of (F) > Spring is created.

Created spring element between the gaps of the parallel brackets

3Dimensional representations of the bracket with connections

RESULT :

• ROD element as given dimension with RBE2 link created and Translational DOF constrained with RBE2 link successfully at A section
• BEAM element as given dimensionn with RBE3 link created and all DOF constrained with RBE3 link successfully at B section
• BAR element as given dimension with RBE2 link created and X and Y DOF constrained with RBE2 link successfully at C section
• Mass has been applied with magnitude of 10 successfully at D & E section.
• Joining the two components with spring elements created successfully at gap F