Week - 8 Mass Scaling

Aim: To  extract a mid surface and mesh the  given component.   Objectives:   1. To geometrically clean the model for any error on it.  2. To extract a mid-surface of the component.   3. To clean and defeature the Midsurface so as to avoid any minimum length errors while  …

Objective:  To perform the analysis to simulate a sphere pressing on a plate. The plastic deformation on the plate is captured. The symmetry operation is performed to reduce the computational time and cost. Case setup and Execution: CAD model: The parts are: 1. Sphere, 2. Plate Materials used: Structural Steel Structural…

Aim: To perform an analysis to simulate the bending of a wire in ANSYS.The Copper Alloy (Non Linear), Aluminium Alloy (Non-Linear), and Magnesium Alloy (Non-Linear) are the materials used for the wire alone. To find out the Equivalent stress and Equivalent strain on the wire alone and compare the results.   Case…

AIM: Simulating three different types of welding using three different weld materials, for a load of 15000N that is to be applied at the rectangular hole of the bracket. For each case, the directional deformation and equivalent strain experienced by the setup is found out to identify the weld joint that experiences…

AIM: To perform a static structural analysis on the Railwheel and Track setup. CASE_1 :  Perform a static structural analysis on the Railwheel and Track setup with the load of 100000 N, compare the results by multiplying the bearing load by 5 times . Compare the Total Deformation, Equivalent stress, and the life…

Analysis of Bevel gear for mesh dependency: Objective: The objective is to perform a grid dependency test for bevel gear with different mesh sizes i.e., 6, 5, and 4 mm. Evaluate and Compare their von-mises stress, equivalent elastic strain, contact pressure, and total deformation. Grid dependency test and its uses:…

Analysis of spur gear for different materials Objective: To determine the most suitable material for the spur gear by performing the contact simulation.  The materials used in the simulation are Cast Iron, Cast Steel, and Cast Bronze. The material cards used are shown below Cast Iron: The used material can be…

OBJECTIVE: To design a plate of 300*120*30 with a hole for the following cases case-1: hole of 60mm diameter at the center case-2: hole of 60mm diameter at the center and smaller holes of 30mm at 90mm away from the center. A load of 500N on the right face is assigned for both cases. Compare the deformation and…

Aim: Mesh the given geometry and provide the necessary connections. Procedure: Step 1: Create a 2D mesh for the mid-surface Step 2: Check for the quality criteria Step 3: Create the necessary connections and make sure the connections are realized Step 4: Check and clear the quality criteria if any Theory: The connectors…

AIM: To create a Teramesh for the given components with the given quality criteria. Theory: There are 2 main types of 3D elements Tetrahedral elements (4 faces, 4 nodes) and Hexahedral elements (6 faces, 8 nodes). 2nd order elements, called also quadratic elements, add 1 middle node to each edge. The calculation is more…

AIM: To mesh the given hood model for the given quality criteria. Procedure:  Import the model: GUI contains 4 components 1. Outer hood 2. Inner hood 3. Latch 4. Hinges After importing the cad model, the geometrical errors in the cad model are to be spotted and fixed. The given components are having volume, so delete…

Objective: To create mesh with the size of 5mm. To create 1D elements on the given component with cross-section and DOF.  Procedure: Given model: We can see there are extra geometry in the given model. Delete the extra component given. Go to geometry >>> Auto cleanup >>> Maintain the target element size to 5mm as given…

AIM: To calculate the moony rivlin and Ogden material constants and compare both using stress-strain data from adogbone specimen with stretch ratio = 2. The given material data is engineering stress-strain data in MPa. Theory A hyperelastic or Green elastic material is a type of constitutive model for ideally elastic material…

Aim: To demonstrate spherical, revolute, cylindrical, and translational joints between two rigid bodies and two deformable bodies by using the manual for reference. Joints Cylindrical joint: A cylindrical joint is a two-degrees-of-freedom kinematic pair used in mechanisms. Cylindrical joints provide single-axis sliding…

 AIM: To simulate the non-linear transient birdstrike where, the bird tries to hit the blades of gas turbine by using LS-DYNA. PROCEDURE: Part Creation Material and section creation Contact creation Boundary conditions Re-numbering Control Cards Database Cards Model check-up Mass scaling Post-processing Conclusion…

Objective: By using the diagram of the true stress-strain curve of graphite iron casting. create the material model for the given dog bone specimen. Validate the created material model by performing a tensile test on given specimen, Results are to be compared. Procedure for material modeling: Data extraction from…

AIM:  Compare the results for the simulation using ELFORM = 1, 2, -1, -2. Plot comparison of various ELFORMS against the Uniaxial Plot. Objective: Create a block of 10mmx10mmx10mm dimension with 10 elements for each direction and use the material card attached (Ogden_Material.k) that is representative of the…

AIM: To use mass scaling to reduce the simulation time and ensure the stability of mass scaling. Compare the run time of implicit and explicit analysis. Theory: Time step: Time step is the time required by the shock wave to propogate across a smallest distance of a element. The time step size is given by:                                     …

Aim:            Setting up the case for head impact from simple head model, adding complexities step by step and the respective HIC values are to be obtained. The head injury criterion (HIC) is a measure of the likelihood of head injury arising from an impact. Theory: Pedestrian…

Aim: To model the spotwelds for the given assembly of parts using beam and solid elements and the respective results are to be compared. PROCEDURE: Import the .K File into LS-PREPOST: We can see only the parts are defined in the keyword manager. Steps to follow: 1. Create a material card 2. Create the Section card 3. Assign…

AIM:           To simulate a crash test for a crash box for which mesh is given. Assumptions and information required:        The crashbox should crash into a rigidwall created using *RIGIDWALL_ keyword. Check the manual to understand and create a rigidwall.   Material…

AIM: To learn how to create a input deck to run the simulation and learn how to plot the results by performing a drop test analysis on the given meshed model. Objective: To create the material card for respective parts by providing the properties. To create sections to the parts. Assigning the material ID and section ID…

AIM: The given equation is to be solved by using both Explicit and Implicit Methods ( have a tolerence of 0.001). Theory:  There are two methods of solving fininte element methods: Explicit analysis Implicit analysis Implicit analysis: Implicit analysis is generally used to solve static problems and Quasi-static problems,…

AIM: To calculate the unit conversion from SI unit to  Kg cm ms Kg cm s gm mm ms kg m s g cm s g cm us g mm s ton mm s slug ft s kg mm s g cm ms kg mm ms Theory: Different industries use different system of units as per their convenience. The units for the basic measurement quantities, mass distance and time - dictate…

AIM: To create deck setup for side crash of car BIW and request for time plots. OBJECTIVE: 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 penetration and intersections. Create rigid wall with friction 0.1 as per referance…

AIM: To create deck setup for frontal crash of car BIW and request for Time History plots. OBJECTIVE: 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…

Objective:  To Create the mesh for bumper assembly of mesh size 6mm.  To the given crash tube, Run the simulation as it is with provided interface properties. Change the Inacti = 6, run the simulation and compare the effect of Inacti w.r.t above case. Create the TYPE 11 contact and compare with TYPE 7 contact.…

Objective: The given model is a rupture plate , it is collided by a punch at a velocity. For the given model, obtain the results from different cases: Running the model as given i.e., with failure card and material card M2_PLAS_JOHNS_ZERIL. (Named as law2_epsmax_failure) In Failure card change Ifail_sh=1, Dadv=1,…

OBJECTIVE:                 To compare results of base simulation with improved shell element properties. Case 1 setup and Procedure: Step 1:         Change the run time to 55 ms. Step 2:          Change the number of animation…

OBJECTIVE: To check the material properties of the rail component and calculate the speed of sound in steel rail, Time for sound to travel length of rail. To edit the engine file so thet stress wave can be monitered, Set the frequency of animation output to a time that will give 20 animation steps. To perform 3d meshing…

OBJECTIVE:  Clean the geometry. Extract midsurface. Clean midsurface geometry. Ignore holes less than dia 5mm. Create 2D mesh with target length 5mm, min 3.5mm max 7mm. And assign proper thickness, by creating a generic property. Then Save in .hm format.     Given Components: Practice Clip Repair Mounting…

AIM: To mid-surface the features of thickness less than 5 mm and meshing to given quality criteria. To the features of thickness greater than 5mm do the tetra mesh and volume mesh is to be done. Necessary connections has to be made. Procedure:  Import the model and make sure that there are no geometrical errors in…

AIM: To check for the geometrical errors and mesh the geometry with the given element Quality criteria. Procedure:  Step 1: Import the given model Step 2: Geometry clean-up is to be performed to remove unchecked faces, needle faces, overlap faces, craks etc. Figure below shows the model after geometric clean-up. Make…

Aim: To perform morphing techniques on the given model. Procedure: Import the given models and perform geometric clean-up. model 1:  Given model after performing topo Check for geometrical errors, model should be free from errors. Performing morphing tools on the model: Morphing deck >>> Boxes >>>…

AIM: For the given Rear door FE model, Create and Apply different PIDs for different components. Perform suitable connections.  PROCEDURE:  Step 1: Import the given rear door FE Model. Step 2: Create different properties for different components. Step 3: Bolt connections at hinge by RBE2 many node and RBE2 two…

AIM: For the given Rear view mirror component, check for the geometrical errors and mesh the Surfaces with the given 2D element Quality criterias given, Use tetra elements to mesh the Volumes defined in the model and check for the given quality after Volume meshing. PROCEDURE: Step-1: Geometric clean-up of the…

TOOL TEST 2

TIME TAKEN FOR PLASTIC MODEL: 2 DAYS SHEET METAL MODEL: 1.5 DAYS

  Aim: To the given Plastic Bottle Cap model, check for the geometrical errors and take the mid surface by suitable mid surfacing techniques. PID and Thickness assignment is done for all the mid surfaces. Mesh the same with given element Quality criteria. Procedure:  Step 1: Geometric clean-up of the cad model…

AIM: To clean-up the CAD geometry and mesh the model to the quality requirements which is ready-to-run solver input file. PROCEDURE: Step-1: Geometric clean-up of the cad model i.e., hood model. After importing the cad model, the geometrical errors in the cad model are to be spotted and fixed. After importing cad model…