Perform geometry clean up and mesh the model for structural analysis with a target element size of 5mm for the following Ip Substrate models.

OBJECTIVE :

• Perform geometry clean up and mesh the model for structural analysis
• Target element size of 5mm for the following Ip Substrate models.
• To create the mid surface of the model
• Mesh show in shell mode
• Clear the off elements

PROCEDURE: As there are 5 IPsubstrate models we have to do it one by one these components are from the dashboard of a car model as there is a plastic component we can create a mid surface of it.

As we are given 5 substrate model we will handle them one by one

FIG.1 QUALITY CRITERIA SHEET

In the above fig, there are quality criteria by which we have to define the quality of all the models

We have the first model (IP-SUBSTRATE)

FIG.2 IP-SUBSTRATE MODEL FIRST FOR CREATING MESH IN PID MODE

So as we have the first model ready in a PID mode we can create the mid surface by two methods.

1. By creating the offset of each part

2. By creating a command called mid surface

in mid surface there is skin and casting

therefore by first creating by an offset it is time-consuming we get the accurate results but not used for simple model

use offset for difficult models where the mid surface is not in used or it is not able to create the mid surface properly

BY USING OFFSET COMMAND MID SURFACE IS CREATED :

To offset any surface measure the thickness of the surface or distance between the two nodes

FIG.3 DISTANCE BETWEEN TWO NODES

FIG.4 DISTANCE OR THE THICKNESS BETTWEN THE TWO SURFACE OF MODEL

As the distance is the use we can go for offset for that open the offset command and select the surface you want to do offset

as we have taken the rib of the model the distance between the needs of rib is approx 2 mm

so the offset will be of 1 mm, therefore, delete the face and middle-click n enter the distance of offset the direction is been shown in which offset is to be done.

FIG.5 IMAGE SHOWING THE BEFORE AND AFTER OF THE MID SURFACE CREATED

this method is time-consuming and each time we have to check the distance between the two nodes and create offset according to this

so usually don't use this method

BY USING MIDSURFACE COMMAND MID SURFACE IS CREATED :

• In this, there is skin and casting we go for casting
• casting mid surface is created with equal length and does not require calculating nodes for each surface

for this defines the length of the mesh as 5mm

as the length is defined and go to the mid surface plane select the casting and then select the hole surface it will create the mid surface of the model and it does not require time as compare to offset

selecting the face and middle-click we get a mid of the model after getting we have to check the model check middle surface.

FIG.6 CHECKING THE MIDDLE SURFACE OF THE MODEL

Fix those error and go for quality criteria we have given

• After the quality criteria are given then we can define the thickness ANSA automatically defines the thisness where required
• thickness is created where required
• remove the off elements like skewness, minimum length, maximum length taper traingle %, etc

FIG.7 GIVING THE THICKNESS TO THE MODEL

Defining the QUALITY CRITERIA

there are 17900 off elemental error we need to fix them by remesh, reconstruct and fix quality command

FIG.8 NUMBER OF OFF ELEMENTS TO BE ELIMINATED

Some elements do not fix by the remesh, reconstruct and fix quality we need to recreate the elements and delete the old one.

FIG.9 NUMBER OF OFF ELEMENTS ELIMINATED

OFF elements are removed we can see the model is well mixed meshed

define the shell mesh we can see the shell mesh model from presentation parameters

FIG.10 SHELL MODE OF THE MODEL

This method is suitable for creating the mid surface of part of a model and later we can join them as entier model

For the second model same procedure :

• As we open the model in SHADOW MODE we can see the model with double cons for creating mid surface we don't need triple conns and single cons so better we get rid of them.
• Go for geometry check if no error defines the length and go for middle surface casting for creation of mid surface.

FIG.11 ON OPING THE MODEL WITH DOUBLE CONS

• As the mid surface is created we have thickness issue this can be solved by calculate mid surface thickness command give the maximum thickness and proceed for it
• We can see the ANSA defines the thickness according to it and the thickness problem is been solve but need to note the minimum and maximum thickness are been defined

FIG.12 DIFFERENCE OF THICKNESS BEFORE AND AFTER THICKNESS GIVEN

As we have defined the thickness we can see there are different PIDs been defined so and there thickness is also different.

• To reconstruct them one by one and again assign them as the same PID

PID after compressed has been done PID which were not required are been deleted and visible PID are been shown

FIG.13 PID AFTER COMPRESS

FIG.14 NUMBER OF OFF ELEMENTS ELIMINATED

As quality criteria are been define clear the off elements and thus this part is also been cleared

We got he mid surface and all the quality criteria are been followed

FIG.15 SHELL MODE OF THE MODEL

FOR the THIRD MODEL OF IP SUBSTRATE

We have the third model it's in ENT MODE having double;e cons which are required if there are no double cons create them

by using a command called past create surface etc

FIG.16 ON OPING THE MODEL WITH DOUBLE CONS IN ENT MODE

by using the middle surface command in that casting created the middle surface

as the middle surface is created this parts there is an error in the creating the middle surface

Using the command called ALIGN we can solve the problem as these elements are not in a straight line we need to create a smooth surface

align makes them straight and in a straight line

we can see the mid surface and the original surface by the transparent mode which can give us whether the surface has been created

FIG.17 TRANSPARENT MODE OF THE MAIN COMPONENT

define the thickness and set the PID we can go for quality criteria information

after giving the quality

we can proceed to eliminate the off elements

as the elements are been cleared therefore the model is been mid surfaced

FIG.18 THICKNESS GIVEN

OFF ELEMENTS CLEARED

FIG.19 NUMBER OF OFF ELEMENTS ELIMINATED

FIG.27 SHELL MODE OF THE MODEL

FOR the FOURTH MODEL OF IP SUBSTRATE

We have the FOURTH model it's in ENT MODE having double cons which are required if there are no double cons create them

by using a command called past create surface etc

giving the length as 5mm

As we did for the other surface likewise we need to do for this surface

geometry check cleared

go middle surface casting

FIG.21 TRANSPARENT MODE TO SEE THE MID CREATED

By using PID for the main surface as the transparent mode on we can see the mid surface

and able to figure out if the mid surface is been created.

The mid surface was not properly created so by using create a new element and using the delete tool of mesh we can create the new elements.

As we do the mid surface there is mesh created automatically.

FIG.22 TRANSPARENT MODE TO SEE THE MID CREATED

the elements are properly attached representing the model and the mid surface is been properly represented

Giving the quality criteria we can do eliminate the off from the mid surface by hiding the main surface (model)

assign the thickness

There are about 3131 off elements clear them with the move surface remesh, reconstruct

FIG.23 NUMBER OF OFF ELEMENTS ELIMINATED

The shell mode of the model

FIG.24 SHELL MODE OF THE MODEL

FOR the FIVETH MODEL OF IP SUBSTRATE

this model is having geometry error we need to fix them such as topo error, extra surface, and missing surface, etc

and then have geometry check for that

By flowing above process, we have a mid surface of the fifth model

(mid surface)command

FIG.25 ON OPING THE MODEL WITH DOUBLE CONS IN ENT MODE

get to the transparent mode and check whether the mid surface is properly done

As it is done check the mesh check parameters

and define the thickness

BEFORE AND AFTER IMAGE OF ELEMENTAL ERRORS FIXED

PID has been assigning the PID which are not required should be deleted and compressed

mid surface thickness defined

after compress is done the PID is deleted

there are lots of OFF elements eliminate them as these are not following the quality criteria given

about 22444 elements

FIG.26 NUMBER OF OFF ELEMENTS TO BE ELIMINATED

FIG.27 SHELL MODE OF THE MODEL

CONCLUSION :

• All the parts mid surface has been created.
• Quality criteria have been given to all the model parts.
• Off elements are been eliminated.
• Shell mode of all the parts is shown.

https://drive.google.com/open?id=1oJcLABlLMN2y0KeiV3O3CzzHjpRLibG7