Week 4-1D Element Creation Challenge

Aim:

To mesh the given component with size of 5 units, createation of 1D elements with given cross-section and DOF

Given data :

a. ROD Element :- Translational DOF should be constrained with RBE2 link

cross- section : BOX a=12mm, b=10mm and t=0.75mm

b. BEAM Element :- All DOF should be constrained with RBE3 link

cross- section : I a= 8mm, b=10mm, c=8.5mm, t1=0.75mm, t2=0.6mm, t3=0.6mm;

c. Bar element:- Constrain only x and y DOFs With RBE3 link

Cross-section: X section- Dimension DIM1= 5 mm

Thickness DIM2= 1.2 mm

Dimension DIM3= 10 mm

Thickness DIM4= 1.2mm

d. & e. Apply the mass of magnitude 10 with the RBE2 link

f. Join the two components with Spring elements

1.Importing the IGS File

Using import option CAD file was imported into hypermesh.

2. Midsurface Extraction

GEOM --> midsurface --> select the surface --> extract. Top and bottom surfaces are extracted separately and are saved in different component.

3. Meshing

After assigning property to the midsurfaces. washer splits are given to each holes. Automesh was used with elemnt size of 5 units to mesh the surface. Nodes' values were equated on the washer split.

4. 1D Elements

1D element used in this challenges are PBAR, PROD, PBEAM, RBE2, RBE3.

As per given details 1D elemets with their specifications were created and were deployed at their designated places respectively.

For creation of crossection of 1D elements HYPERBEAM was used.

A. Rod Element

1D--> Hyperbeam --> create --> standard section --> hypermesh --> Thin walled box.

B. Beam Element

1D--> Hyperbeam --> create --> standard section --> hypermesh --> I-section.

C. Bar Element

1D--> Hyperbeam --> create --> standard section--> optistruct --> cross

Creation of 1D Elements.

ROD ELEMENT

* RBE2 cluster element for hole "a" was created by contraining translation as per given input data

* CROD elements created by joining holes "a".

* CROD - Thin walled cross section given as per input.

BEAM ELEMENT

* RBE3 cluster element for hole "b" was created by contraining all dof as per given input data

* CBEAM elements created by joining holes "b".

* CBEAM - I cross section given as per input.

BAR ELEMENT

* RBE3 cluster element for hole "c" was created by contraining 'X' and 'Y' as per given input data

* CBAR elements created by joining holes "c".

* CBEAM - 'X' cross section given as per input.

for d. and e.

RBE2 cluster element was created for hole d and e.

mass was applied of 10 units.

CONCLUSION:

The mesh & craeation of 1D element has been successfully achieved as per given inputs.