FRONTAL CRASH ANALYSIS OF NEON MODEL -ASSIGNMENT 6

• G DRIVE LINK:https://drive.google.com/drive/folders/198kjB6RImn3hSb164YO3ucfBh7fTSoqY

• AIM :
  • • • Sectional force in the rails at location of indicated node 174247.
      • Axial force received on the rails from bumber.
    • • Shotgun cross sectional foces.
    • • A pillar cross section.
    • • Acceleration curve received on the accelerometer at base of B pillar (on B pillar rocker).
    • • Intrusions on the dash wall 66695,66244.

• NECESSARY REQUENTMENT FOR FOR THE FRONTAL CRASH
  • • • Check unit system and either follow[Mg mm s] or [Kg mm ms].
    • • Create appropriate interface ,friction 0.2 and recommended parameters.
    • • Make sure of no penetrations and intersection.
    • • Correct rigid bodies if any issues.
    • • Create rigid wall with friction 0.1.
      • Compare the model weight with the full scale 300k nodes model and use added masses to reach target weight 700kg while getting CG about the required range.
    • • Initial velocity 35 mph.
    • • Use model checker to ensure good quality.
    • • Timestep :0.5 to 0.1 microseconds.
    • • Run 80ms.

• • Check unit system and either follow[Mg mm s] or [Kg mm ms].
    • • • • • • • • • AS PER VIDEO WE FLLOW THE STANDARD UNIT SYSTEM KG MM MS

• • Create appropriate interface ,friction 0.2 and recommended parameters.(Interface Type 7: Nodes to Surface Contact)
    • • • • • • • • • Interface type 7 is a general purpose interface and can simulate all types of impact between a set of nodes and a master surface
                  • • Contrary to interfacetypes 3 and 5, interface type 7 is non-oriented and slave nodes can belongto the master surface. Therefore, this interface can simulate auto-impact,especially buckling during a high speed crash.

• • • • • • • • • • • Interface type 7 solves all problems and limitations encountered with interface types 3 and 5.

• • • • Important Interface Parameters(TYPE-7)
        • • • • • • Igap Determines how the size of the gap is calculated
                • • Gapmin Minimum gap for activation of interface
                • • Inacti Action to take if initial penetrations exist
                • • Istf Affects how the stiffness of the interface is calculated
                • • I form Friction formulation AND Stmin Minimum stiffness to use in the interface
                • • I del What to do with slave nodes and master segments if element fails (deleted) that they are attached to

• Make sure of no penetrations and intersection.
  • • • • • • • • • THE GIVEN MODEL AS NO PENTRATIONS

• Create rigid wall with friction 0.1:
  • • • • • • • THE R-WAL CREATED 100 MM APART FROM THE BUMBER SURFACE IN ORDE TO FET BETTER VISUALLATION
              • WITH FRICTION 0.1 AND DESERCH 1000

• Compare the model weight with the full scale 300k nodes model and use added masses to reach target weight 700kg while getting CG about the required range.
  • • • • • • • BEFORE MASS ADDING
                • APPROPRIATE MASS AND LYING CG

• Initial velocity 35 mph.
  • • • • • • • • • BC MANAGER => SELECT TYPE(INTIAL VELCOITY) => X=15.64 MM/MS =>CREATE.

• Use model checker to ensure good quality.
  • • • • • • • • • THERE IS NO ERROR IN MODEL.

• Timestep :0.5 to 0.1 microseconds.
  • • • • • • • • IN ORDER TO GET ACCURATE RESULT WE GIVEN TIME STEP 0.5 MS SO, THE 16 ANIMATION FILE CREATED.
                • AND CST TIME STEP USED

• RUN 80
  • • • • • • • • THE TOTAL SIMULATION TIME IS 80MS

• OUT PUT REQUEST
  • • • • Sectional force in the rails at location of indicated node 174247.
        • RAIL cross sectional foces.
        • Acceleration curve received on the accelerometer at base of B pillar (on B pillar rocker).

RESULT AND EXPLANATION

• • • • • • • • • IN THIS GRAPH SHOW THE INTERNAL ENERGY IS SLOWLY VARYING THE WITH RESPECT TO THE TIME AND THE MAX ENERGY OFTHE BODY IS 40745 JAT THE 80MS IN STARTING TIME THE SYSTEM UNDER EQUALIBRIUM CONDITION
                • IN THIS GRAPH SHOW THE KINETIC ENERGY DECREASE FROM 86792 J TO 43349 J AT THE TIME OF 80MS THE ENERGY POSSES DUE TO THE MOTION AND THE IMPACT THE INTERNAL ENERGY IS POSSESSES IMPACT
              • MAX INTERNAL ENERGY=40745J
              • MAX KINETIC ENERGY=86792 J
                • IN THIS SHOWS THE THE TOTAL ENERGY OF THE SYSTEM IS GRADUALLY REDUCE DUE TO IMPACT COLLISIONS IN THE INTIAL STAGE NO IMPACT HAPPENED THE ENERGY OF THE SYSTEM IS VERY HIGH AFTER THE IMPACTING THE CAR IN TO THE R WALL THE ENERGY OF THE SYSTEM IS DISPOSED
                • THE MAX ENERGY OF SYSTEM IN 0 MS IS 87044J AND THE MIN IS AT 80MS IS 84095J
                • THE SHOT GUN 0.9KN AT THE SPAN OF OVER THE 40-60MS AND THE SHOT GUN 2 IS FORCE IS REMAIN CONSTANT IN EXPERIENCE THE COMPARISON OF BOTH SHOT GUN 2 IS BETTER.
                • THE RAIL 1 THE MAX VALUE OF FORCE IS TRANMITED IS 3.72KN AT THE TIME INTERVEL BETWEEN 35-60 AT THE SAME TIME THE RAIL 2 FORCE IS REMAIN CONSTANT SHOW THE BETTER RAIL TO IS GOOD IT EXPERIENCE LESS FORCE IN RAIL2.
                • THE SIDE PILLAR A -1 IS TENDS TO CONSTANT FORCE AT WHOLE CYCLE OF TIME BUT THE RIGHT SIDE PILLAR 2 IS GETING COILLSION DUE TO THE FOREC THE MAX FORCE OF THE PILLAR 2 IS 2.64E-2N AND THE TIME VARYING THE PILLAR CONTINUOUSLY UNDER GONE DEFORMATION DUE THE FOCE OF BODY
                • THE RATE OF CHANGE OF VELCOITY WITHRESPECT TIME THE MAX ACCELERATION TAKEN FROM ACCELERATION IS OVER THE TIME IS 2.27E-16 THE TIME SPAM OF 70 TO 75MS
                • IN INTRUSION 66695 NODE WE MEASURE THE DISPLACEMENT AND VELCOITY.THE DISPLACEMET 995MM TO 0 OVER THE TIME AN THE OTHER HAND THE VELCOITY IS INCREASED IT SAY THE DISPLACEMENT INVERSELY PROPORTIONAL
• OTHER IMAGE
  • • • • • • • • THE DISPALCE OF THE TOTAL SIMULATION OCCR THE SYSYTEM IS 1197.714MM AND THE STRESS OF THE SYSTEM IS 0.38

• CONCULSION OF THE ASIGNMENT
  • • • • • • • • TOTAL TIME CYCLE IS 79900
                • ENERGY ERROR IS 1.5%(UPTO 15%IS ACCEPTABLE)
                • MASS ERROR IS 0.3623E-01
        • IN THE ASSIGMENT WE LEARN HOW TO SET SECTIOINAL FORCE AND ACCELAROMETERS HOW TO MESURE THE FORCE IN VARIOUS CROSS SECTINAL FORCE LIKE RAIL,SHOT GUN , PILLAR ETC..
        • AND HOW TO CREATE INTRUSION NODE MEASUREMENT..