Project 1

AIM: To extract mid surface and mesh the given model according to the quality criteria

PROCEDURE:

Step 1:

• First step is to perform TOPO on the model as soon it is imported into the software, in order to clear the transition error
• Below image represents the model befor performing TOPO, it is observed no faces are stitched together.

• Check for the geometry error by Check>Geometry>Execute

Step 2:-

• If any geometry errors are found isolate it and fix the same either by auto fix or manually fix all the errors
• Check for collapsed face, single cons, triple cons and fix all the error

• In this case the model given is cut into half, so single cons are present, neglecting those cons and check for the geometry error

Step 3:-

• Afetr checking the model for error next is to extract the mid surface for the component
• First measure the thickness of the model in many instances
• offset the surface giving the offset value as half of the measured thickness

Step 4:-

• Once the mid surface extracted go to set PID and assign thickness and give an user defined name
• When trying to extract a mid surface keep the selection in feature mode, so that the whole feature with same thickness will be selected in single shot
• once the main parts mid surface is extracted , start extracting the mid surface for features like Ribs?(stiffners) and Dog house
• Use Face middle or Face Offset option to extract the mid surface

Step 5:-

• Once the mid surface of ribs are extracted connect the same to the main parts mid surface using extend option

• After extending the ribs, take mid surface of dog house feature
• Offset the feature from outside by giving a small value
• The double of the offset value should be assigned as thickness for the mid surface
• For example if the feature is offsetted with a value of 1mm, then assign the mid surface thickness as 2mm

Step 6:

• After Mid surface extraction performed check for all the geometry errors , except for single con and triple cons
• Because the mid surface perimeter always are single con and due to extend operation performed triple cons are also formed
• Below image represents the geometry checks of Mid surface

Step 7:-

• Once the Mid surfae is ready, next move to mesh module deck
• Give the mesh parameter value and Quality criteria

• Assign the Macros and Perimeter length

Step 8:-

• Start Meshing every region seperately and fix the off element by reconstrution, smooth or split options
• mesh all the regions and try to fix all the OFF elements present
• In the given model , the OFF elements due to triple cons are acceptable.

• The above image is the final representation of fully meshed part

Step 9:-

• Finally assign the thickness to the mesh by Quality criteria> Presentation parameters> enable "Draw shell as solid"
• The given thickness in property ID will be assigned to the respective feature

LEARNING OUTCOMES:

• Understood the different cases of error which might occur in damaged region
• understood how to fix unchecked faces error
• Imporatnce of assigning the PID to extracted Mid surface
• Understood the importance of meshing region by region

CONCLUSION:

• The given Model is fully meshed and assigned the thickness to the same
• The final model drive link is attatched below, please go through the same
• https://drive.google.com/file/d/1_K3YQcFzyNwj-zivO70LauOmEHHo8ZM6/view?usp=sharing