Week - 4 - crash box simulation

Aim: The joints of revolute, cylindrical, translational and spherical joints between two rigid bodies and two deformable bodies are compared in the Ls-dyna software. Objective:  The joints is part of the machine used to connect two or more parts together temporary or permanently. They will be designed in such a manner,…

Aim: The given material data is used to calculate Mooney-Rivlin and Ogden material constants and comparison between both by using stress strain curves. Procedure: The given material data is used to calculate Mooney-Rivlin and Ogden material constants and compared Both with the stress Vsstrain curves of dog bone specimen…

Aim: To create a material model using the data extracted from the given true stress-strain curve of graphite iron cating using the dog bone specimen. Note: The unit system used is kg-mm-ms. Based on the characteristics of the material, the solver LS-DYNA has categorically classified material models. For example, *MAT_ELASTIC…

Aim: 1)To use mass scaling to reduce the runtime of a model and ensure the stability of model. 2)To observe the effect of DT2MS on CPU solving time also limiting the mass scaling to only 8%. 3)To observe the effect of TSSFAC on CPU solving time for solution. 4)To run the model with implicit solver and compare the…

Objective: In this challenge, a children's head foam model is provided and supposed to replicate a scenario where this head foam will impact a car bonnet. The hood model is an elasto-plastic material card that has to be used. From the simulation, the head impact coefficient must be calculated manually and with the help…

INTRODUCTION:Ogden material model is a hyperelastic material model used to define the non-linear behaviour of materials like rubber and polymers. This material model is generally used for materials showing incompressible, isotropic and non-linear stress-strain behaviour.In this study, a solid cube of rubber material modelled…

Objective: To simulate a crash test for a crash box given. Introduction:  Crash box is a thin-walled component which deforms axially and absorbs the energy during impact. The crash box is widely used in automobile and aerospace industry to absorb accidental impact energy. This safety component reduces the injuries…

Objective:To create an input deck from begining. Procedure: As .k file contains only node numbers and element types I have to create all deck information from the begining.Hence import the given file in LS prepost and open the keyword manager. 2)Here in this case need to import the only mesh drop test model into the…

Objective: 1)Solve the given equation for the implicit and explicit analysis. 2)Explain details for implicit and explicit analysis. Implicit analysis: (a)In case of static analysis such as stress analysis in FEA, is solved using the simple linear equation {F}=[k]{U}.In this case time step is absent i.e the solution eqautions…

Objective:To convert given system of units into desired unit system with conversion factors. Data given: MASS 1kgLENGTH 1mTIME 1sFORCE 1NSTRESS 1PaENERGY 1NmDENSITY 1Kg/m3YOUNG'S Modulus  210GPaVelocity 56.33KMPHGRAVITY 9.8m/s2 1)Coversion of SI unit to gm/mm/ms system Mass:1 kg=1000 gm=10^3 g Length:1 m=100…

Objective:To perform the meshing as per the given criteria for floor panel geometry. Procedure: 1)Open the given model in hypermesh with radioss solver. 2)As the geometry is having uniform thickness throughout the section perform auto cleanup tool to clean the geometry. 3)Delete all unnessecory components from the model.…

Objective: 1) Manually extract the midsurface of the given geometry, clean up the midsurface for meshing and mesh it according to the quality criteria then assign the thickness to different parts of the geometry. 2)The given mesh quality criteria is, Follow the Quality Criteria and mesh the following component and assign…

 Objective: 1)To create tetramesh for housing component. 2) First clean the model for surface fillets and edge fillets. 3)Delete all the fillets bellow the given range. 4) To mesh the geometry go to 3D mesh-volume tetra-define the element size-mesh. 5) First mesh the hub component. 6)Similarly repeat the above procedure…

Objective: To create various types of connectors as mentioned above. Procedure: Import the geometry and mesh the model for given meshing criteria. After meshing create the connectors one by one. 1)Right_Rail_2 & Front_truss_1:- Seam-Quad(angled+capped+L) To create connectors go to 2d-connectors-seam-Quad(angled+capped+L).Select…

Objective: To mesh given bumper hood cad model and apply mentioned quality criteria and assign thickness. Apply following mesh quality criteria and thickness value.   S.N Quality Criteria  Value  1 Aspect Ratio  5 2 Skewness 45 3 Warping 15 4 Taper      0.5 5 Min. Length 2mm 6 Max. Length…

Objective:Creat 1D elements on the following component with given cross-section and DOF. Procedure: Import the geometry in hypermesh. Make sure that geometry is clear for any edges and pin holes. Now extract the midsurface Geometry-midsurface-extract. Create seperate componenet for each bracket i.e. bracket 1 and bracket…

Objective: To perform the side cash analysis of Neon BIW model on rigid pole to analyze following. a)Sectional force in the cross member. b)Intrusion at B pillar,hinge pillar and fuel tank region.Provide recommendation on what can     help to reduce Fuel tank intrusion. c)Peak velocity of inner node of the…

Name of assignment:Frontal crash analysis of BIW Neon model. Objective: 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 issues. Create rigid wall…

Objective:To compare the base setup simulation results and different kinematic condition simulation  results. Case I) Meshing of Bumper assembly Procedure: Create the mesh for bumper assembly,mesh size should be 6mm. First import model in hypermesh window and clear the geometry for nodes ans see any surface tearing.…

Title of the project:To analyse failure behavior due to impact and material on plate and sphere in contact. Objectives: To apply and run the various material and failure card information provided with the slides to given model. To analyse the best possible results from the data. To check changes in IE,KE and hourglass…

ANALYSING STEEL RAIL USING RADIOSS AND COMPARING RESULTS OF BASE SIMULATION AND SIMULATION WITH IMPROVED SHELL PROPERTIES OBJECTIVES: 1)Comparison between the results obtained by base simulation and with improved shell element properties for the test run. 2)At the end of simulation do the energy error checks and mass error…

Name of the challenge: To create tetra and hex meshing of the given models. Methodology: Element selection as per the geometry. Creation of tetra and 3D meshing. Edit in radios starter and engine.rad file to change material properties and related unit system. Calculation of the time step and elemental length. Report creation…

Following are the process steps 1)Check the 3d model or step/iges file for any deffectss. 2)Clean up the geometry by toggling edges and deleting unnessesary nodes and points on it. 3)Delete the holes and fillet having dia and radius 5 respectively. 4)After geometry cleaning extract the midsurface by 2D-Midsurface. 5)After…