Assignment 1-2D Meshing Challenge

# Assighnment crashworthiness analysis using hypermesh and radioss.

AIM- to mesh the given component and assighning the thickness to the component by giving the target element size as 5 unit

target element length - 5units.

minimum length - 3.5 units.

maximum length -7 units.

radioss-

select the user profile to radioss.

IMPORTANT TO GEOMETRY-

i) click in the import icon on the main menu bar.

ii) select the import geometry and choose the file, click the import.

iii)then the file will be imported and will be shown in the graphical area as below.

DEFEATURE.

i)surface that fall the minimum elemnt size that can be defeatured .

ii)here surface fillete fail for the minimum length.

iii) enter the minimum and maximum radius and select defeature.

iv) now surface will be the defeatured you can se status and change surface graphical area.

EXTRACT THE MID-SURFACE.

i) click on the mid surface from the geometry menu bar.

ii) select the surface and click on extract.

iii) the mid-surface of the component will be extracted.

iv) hide the orignal component and rename the middle surface that is extracted.

v)thus, the mid-surface can be extracted and seen on graphical interface.

PERFORMING AUTO- CLEAN UP-

i) use the auto clean up tool to clean the component surface .

ii) click on the auto cleanup from the geometry menu bar.

iii) select the surface and click on cleanup.

MESHING-

i) ensure the criteria files is applied and and the values are properly applied .

ii) click on auto-mesh from the 2D menu in the menu bar .

iii) set the element size 5 , select the element type is mixed ( quads and trias ) and select the surface to be meshed and click on the mesh.

iv)mesh will be created on target surface.

v)adjust the number of nodes on the either of the side so that ake sure rotational quad are not formed on the surface.

ELEMENT QUALITY-

i) check the elemet quality for failure.

ii)perform the element optimization from the quality index.

iii) Re-mesh group of elemet neccessary.

EDGES-

I) check for free edges by clickin edges from the tool panel.

ii) select the component and the red lines indicates the free edges.

iii) edges at the open and are excluded edges in middle of the middles of the element has to be cleared replacing the nodes and saving the equivalance.

ASSIGHNING THE THICKNESS-

I) check the thickness of the parent geometry.

ii) create propertuy and assighn the thickness to property.

iii) if the thickness is varying seprate the them to diffrent collector and create and multiple properties.

iv) assighn the properties as per the thickness.

v) to check the thickness switch to 2D traditional element representation.