Week - 1 - Consistency of Units

Aim: To setup simulation for both cases as listed above and find the max deformation and Max stresses developed in the plates and to select the best design from analysis point of view Case I:Design a plate with a hole model similar to what we worked in the class, but with increased thickness.Determine the maximum…

Aim: To Simulate non linear transient bird strike simulation where the bird tries to hit the Gas turbine blades,by using LS dyna   Objective:  To perform the simualtion where bird strikes the blades and calculate the stresses and Element history    Procedure:The main bird strike file was opened…

Aim: To Create Cylindrical,Translational,Revolute & Spherical Joints between two rigid and deformable bodies using LS dyna solver   Procedure: Here we need to create four joints ie Translational,Revolute,Cylindrical and Spherical joints  The joints are to be created between two rigid bodies and two deformable…

Aim: To calculate the Mooney Rivlin and Odgen material Constants and Compare both using stress-strain data from a dogbone specimen tensile test with 100 percent strain   Procedure: The model was imported was having few keywords and few were prepared for the tensile test to happen 1.The Curve was defined for the…

Aim: To perform the simulation and validate the curve as shown in the Fig.   Objective: To Validate the stresses and strains on the dogbone specimen and comapre the values with standard MAT_024 Graph    Procedure:  1)The link given above was used to calculate the values from the graph   …

Aim :  To Reduce the Runtime required to run the analysis of given model using mass scaling technique and compare the results for different Cases    Objective : To study the different results that can be acheived by TSFAC and DT2MS parameters in Control timestep card   Procedure:  The Given simulation…

 Pedestrian protection CAE is a part of vehicle safety engineering from a crash perspective. In pedestrian protection, we look for imparting minimum injury to head, upper leg (thigh), and lower leg (including knee) in case of an accident with a human subject. These tests are usually done at a lower velocity from 20-40…

Aim: To perform the simulation on the block using elform -2,-1,2,1   Objective:  1. To create a block of 10*10 mm with 10 elements in each direction and use the material card attached  2. Use appropriate boundary conditions to simulate uniaxial tensile behaviour of the model 3.Compare the results by…

Objective : Model spotwelds for the given assembly of parts and run a crash test   Procedure: 1. The Model was having 2 Plates one at the bottom and and another at the top, first this were renamed to Top and bottom by parts tab     2.After this spot welds were created using the Mesh tab and ELFORM was…

Objective: To perform crash box simulation for different thickness values 1.2 mm 1.5 mm   - The crashbox should crash into a rigidwall created using *RIGIDWALL_ keyword. Check the manual to understand and create a rigidwall.  - Material for the crashbox is steel. The simulation needs to be started using elastic material…

Aim: TO perform Simulation using scartch file by assigning keywords    Objective: To create simulation cards and perfom a drop test simulation     Procedure: 1.The file was having only few keywords which were further edited and simulation was performed 2.The Node set ID's were created using the Create Tab-->Set-->Set Node…

Objective:  To solve the above given equation by using explicit and implicit analysis method   Lets try to solve the above equation by using above methods  F(u)=u3+9u2+4u      --1 By derivating the above equation we get the below equation for stiffness K(u)=3u2+18u+4      --2…

LS-DYNA doesn't have a default system of units. User needs to input material properties and physical dimensions according to a consistent system of units as per their choice. This warrants that to use LS-DYNA in different circumstances, users has to be conversant with converting quantities from one system of units to another.…

Obejective: To perform side pole crash analysis on the Neon model   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 model. Compare…

Objective : To perform Frontal Crash analysis on the Given Neon model with the given parameters Frontal crash-BIW 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…

Objective :Create the mesh for bumper assembly,mesh size should be 6mm.  Run the crash tube model as it is. Change the Inacti=6 and run. Create the type 11 contact and run. Remove both notches  and remove boundary condition on rigid body node then run. Create a new notch in the middle ,select the whole section…

Objective: To perform simulation for 7 different case as shown in the above 3 slides   Case 1: The Model was run as it without doing any changes to the model and the model was run for simulation through  analysis tab   Results : NC= 49379 T= 5.0100E+00 DT= 1.0113E-04 ERR= 0.8% DM/M= 0.0000E+00…

1.Using the crash beam file from the previous assignment, change the run time to 55 ms. Ans.   2. Change the number of animation steps during simulation to a minimum of 25 and maximum of 60. Ans.   3. Run the base simulation without any modification to element properties Ans.   4. At the end of…

1. Check the material properties of the rail component and calculate the speed of sound in steel rail Ans. 163.8 m/s Δt=l/c=l/√E/δ= 1000/√21000/7.8E^-3=163.8     2. The length of the rail is about 1000 mm.calculate the time takes for a shock wave to travel from one…

Aim: To perform 2D meshing on the given 3 models with given below QC with target length 5mm, min 3.5mm max 7mm.   Objective:  Clean the geometry. Extract midsurface. Clean midsurface geometry. Create 2D mesh with target length 5mm, min 3.5mm max 7mm. And assign proper thickness, by creating a generic property.…

Aim:  To perform 2D meshing on the rear wheel holder with the given below Quality criteria Target Element Length = 5 Units S.N Quality Criteria  Value  1 Aspect Ratio  5 2 Skewness 45 3 Warping 15 4 Taper      0.5 5 Min. Length 2 Units 6 Max. Length 8 Units 7 Min angle Quad 45 8 Max angle…

Aim: To perform meshing on the side door model with the below given quality criteria   S.N Quality Criteria  Value  1 Aspect Ratio  5 2 Skewness 45 3 Warping 15 4 Taper      0.5 5 Min. Length 2 Units 6 Max. Length 6 Units 7 Min angle Quad 45 8 Max angle Quad 135 9 Min angle Tria…

Aim: To perform meshing with given quality parameters and provide coneections to assembly Target Element size - 5 Units S.N Quality Criteria  Value  1 Aspect Ratio  5 2 Skewness 45 3 Warping 15 4 Taper      0.5 5 Min. Length 2 Units 6 Max. Length 8 Units 7 Min angle Quad 45…

Aim: To perform tetra meshing on the 3 given models Objective: To perform tetra meshing on the 3 given models with given below quality criteria Procedure:  1.The geometry clean up was done on the model and the edges failing for min length were toggled                …

Aim: To perform 2D meshing on the Hood model  Objective: To extarct the mid surface of the hood model and perform 2D meshing on the surface with the given quality criteria  Target Element Length = 5 Units S.N Quality Criteria  Value  1 Aspect Ratio  5 2 Skewness 45 3 Warping 15 4 Taper      0.5 5 Min. Length 2 Units 6…

Aim: To Create 1D elements and Create a Mesh on mid of the component   Objective: Meshing on the mid surface of the component and creating 1D element by assigning property to each element   Procedure: The component was IGS component so it was imported to HM Step 1:The Mid was extracted from the component and was assigned…

    Aim: To perform meshing on Dashboard of the car Objective: To mesh the dashboard model with the given Quality criteria  S.No  Quality Criteria  Value  1 Target/Average length   4 2 Minimum Length  2 3 Maximum Length  6 4 Aspect  3 5 Warpage 15 6 Skewness 45 7 Jacobian …

Aim: To perform meshing on rear suspension assembly by using below given Quality criteria    Objective: To use proper meshing option on each part and designing of 1D element   Quality Criteria for Surface Meshing of Tyre and Rim (Element type: Tria) :  S.No  Quality Criteria  Value  1…

Aim: To perform morphing on the Object  Procedure: 1) As shown in Fig morphing was performed on the at Seperate plate on the top side and move along transaltory axis   Fig:morphing by creating ortho Box  2. Morphing was done on the other plate so as to move it and see the possible changes that can be made…

 Aim:Creating connection for rear door  Procedure: 1.For bolt connections COG were created at the Bolt circles and were connected through connections manager(RBE2) 2.For perpendicular plates spot weld and seam weld were given by crearting COG and Curves and realized(RBE2)  3.For window RBE3CBUSH connection…

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Aim: Meshing of Rearview mirror(Solid meshing) Objective:No OFF elements and Collapse elements to be present on the surface Procedure: 1.Geometry clean up was done on the model as there were needle faces and single cons present on the surface 2.Further Meshing was done on the model  3.For Curved faces and entities…

Plastic component : No proper mesh flow is obtained near tripple cons Sheet metal: No Proper mesh flow near fillets which are not possible to solve, hence neglecting those off elements

Aim: To  perform 2D meshing for Plastic components(Bottle cap) Objective: To attain proper mesh flow for the components  Procedure: Geo clean up was  done on parent model and then mid was taken  For the varrying C/s areas the Curves were used for making the mid  Meshing was done on the…