WEEK-3 CHALLANGE HOOD IN PROCESSOR STRUCTURAL ANALYSIS OF ANSA
- AIM:
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to mesh the given component according to the quality criterias mentioned in the question
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- PROCEDURE FOR MESHING
- Once geometry cleanup is completed meshing is next.
- Some rules of thumb when meshing:
- The mesh should look rather smooth and regular
- Use the simplest element type suited for the problem.
- Start with a coarse mesh and understand the modeling results; then use a finer mesh if needed.
- Try to keep mesh related uncertainties to a minimum if possible. Keep it simple as it can get more complicated on its own.
- The mixed mode element type is the most common element type used due to the better mesh pattern that it produces (restriction: total tria % <5). Sometimes for structural analysis or for convergence and better results for a non linear analysis, the pure quadrilateral element meshing option is selected.
- How Not to Mesh
- Back to back triangles should be avoided. Two tria elements should not be connected to each other directly.
- On plane surfaces triangular element should be avoided.
- No mesh transition on constant radius fillets / curvatures
- Circular holes should be modelled carefully with a washer (1.5 to 2 times diameter) and a minimum of two layers around the hole.
- Holes should be modelled with an even number of equally spaced elements: For a better representation of the hole geometry and smooth mesh flow lines, holes should be modelled with an even number of elements (like 6, 8, 12,16 etc. rather than 5, 7, 9 or 13).
- Nodes should lie properly on the surface, with no deviation (and no kinks).
- Follow the feature lines (nodes should lie exactly on the edges).
- Instead of a zig-zag distribution, a structured or smooth mesh is recommended
- For crash analysis, follow the mesh flow line requirement
- For crash analysis, rotating quads are not Recommended.
- For crash analysis, constant mesh size (by using trias) is preferred (due to a minimum element length and a time step criteria).
- PROCEDURE OF MID SURFACE EXTRACTION:
- STEP:1 IMPORT THE MODEL AND VIUALIZE THE 2D TOPO
- STEP:2 CLEAR THE ALL FREE EDGE BY USING THE CUT,RELEASE,DELETE IN HOT POINT AND CONS
- STEP:3 CHECK NO FREE EDGE & 3 SURFACE ASSOCITATED SURFACE LINE
- STEP:4 USE MID SURFACE APPRAPERIATE SELECTION METHOD
- STEP :5 CHECK ANY SURFACE GILITICHES ARE FOUND AND CLEAR IT
- PROCEDURE FOR MESHING
- CHECKING THE MODEL IF UNIFORM THICKNESS OR NOT
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- BEFORE GONA TO CHECK FIRST ASSOCITE THE PARTICULAR SURFACE AS NAME OF GIVEN BELOW
- BY USING THE LOCK VIEW
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- MID SURFACE PROCEDURE FOR UNIFORM THICKNESS SURFACE AND SIMPLE SURFACE
- IN THE ABOVE SEEN THE SURFACE ALL ARE SIMPLE AND UNIFORM THICKNESS WE CAN USE HERE MANUAL MID SURFACE BY USING THE \"OFFSET\" METHOD OF HALF THE VALUE IN THE SURFACE MODEL BUT THE TIME CONSUMABLE SO, WE MOVE TO THE AUTO MID SURFACE
- GO TO >FACE>MID.SURFACE>UNCHECK THE DEL ORG.FACE>SELECT SURFACE
- IN THIS IMAGE THE 0.6 IS THE MID SURFECE OF THE SURFACE MODEL AND THE WHITE COLOUR ARROW SHOW THE OFFSET SIDE OF MIDDLE SURFACE
- IN SAME METHOD WE CAN USE THE OTHER MODEL ALSO
- IN THE INNER MODEL SURFACE WE DO THE MANUAL MID SURFACE BY USING THE OFFSET METHOD THE VALUE IS OFF THE MIDDLE SURFACE
- BEFORE GONA TO MESH CHECK THE ORIENT OF SURFACE
- THE GRAY SIDE WHICH INDICATE POSSTIVE SIDE OF THE MODEL
- MEASHING THE SURACE PART-1
- FIRST CLEAN THE UNWANTED CONS FROM THE MIDDLE SURFACEBYH USING THE MACRO CUTS AND PRO.CUT
- UNWANTED TRAIAS AND ROTATIONAL QUADS ARE REMOVED BY USING THE IMPROVE METHOD> USE THE RESHAPE OR RECONSTRACT
- USE THE SMOOTH OPTION THE SMOOTH THE QUAD ELEMNTS
- MEASHING THE SURACE PART-2
- IN THE OUTER PANEL FIRST TOGGLE THE UNWANTED CONS BY USING THE MACRO CUTS AND THE FILLET IS VERY SMALL SO, WE DO THE TOGGLE THE LINE
- BEFORE GONE MEASH FIX THE PERIMETER LENGTH AS 5 MM
- THEN THE MEASH THE SURFACE BY SURFACE
- UNWANTED TRAIAS AND ROTATIONAL QUADS ARE REMOVED BY USING THE IMPROVE METHOD> USE THE RESHAPE OR RECONSTRACT
- USE THE SMOOTH OPTION THE SMOOTH THE QUAD ELEMNTS
- MEASHING THE SURACE PART-3
- MEASHING THE SURACE PART-4
- THEN THE MEASH THE SURFACE BY SURFACE
- UNWANTED TRAIAS AND ROTATIONAL QUADS ARE REMOVED BY USING THE IMPROVE METHOD> USE THE RESHAPE OR RECONSTRACT
- USE THE SMOOTH OPTION THE SMOOTH THE QUAD ELEMNTS
- FINAL QCHACKING IMIAGE OF THE HOOD MODEL
- TO VIEW THE QUALITY MODE CHANGE THE MODE HIDDEN MODE WHICH SHOW THW ELEMENT QUALITY
- THE FINAL QUALITY STATMENT SHOWN THE 98.03% IS THE QUADS OF THE MODEL AND REMAING THE1.97% ONLY TRAIS UPTO 15% ACCEPTABLE AND KEEPING THE LESS THAN 2% IS BETTER RESULT ACHIVE DURING THE MODEL DUMP INTO THE SLOVER AND CONSUME LESS TIME OF SIMULATION WHEN COMPARE THE HIGH PERCENTAGE OF TRAIS
- TO VIEW THE SHELL SOILD PRESS F11 >GO TO THE PRENSENTATION OF PARAMETR>CHECK THE DRAW SHELL SOILD
- CONCULSION
- IN THIS ASSIGNMENT WE LEARN THE BASIC OF MEASHIBG IN THE ANSA AND GUI,MISURFACE EXTRACTING.
- IN THIS ASSIGNMENT WE LEARN WHAT IS MACRO,CONS,HOT POINTS,SOME BASIC MEASHING COMMMAND
- IN THIS ASSIGNMENT WE LEARN THE HOW ASSIGN THE MATERIAL OF THE HOOD COMPONENT
- IN THIS ASSIGNMENT WE LEARN THE HOW ASSIGN THE MATERIAL PROPERTY AND THICKNESS OF THE HOOD COMPONENT