Week - 5 - Modelling Spotwelds

Aim: To perform simulation for the given cases and compating the deformation and stress for the given cases.  Case 1:  Length: 300mm Height: 120mm The hole at the center with diameter: 60mm Thickness: 30mm   Case 2:  Length: 300mm Height: 120mm The hole at the center with diameter: 60mm Thickness:…

Aim: To model a material from raw data and validate the same using dog bone specimen.  Given Data:  Procedure:  Using the data digitizer, the stress and strain data is obtained from the curve and copied to excel sheet and the unit is converted from ksi to GPa.  Now the Effective plastic strain,…

Aim: To create different joints such as revolute, cylindrical, spherical and translational using ls dyna.  Procedure:  Creating Revolute Joint:  Revolute joint is one degree of freedo kinematic pair mostly used in mechanism and machines.  To create revolute joint, open ls prepost and create shell…

Aim: To simulate a non linear transient bird strike simulation on engine using Ls-Dyna.  Setup:  Follow a consistent numbering approach 100000+ for nodes, 500000+ for elements, and 1000+ for the parts. All other keywords should be numbered within 10000-19999 while following a range for each one. This guideline…

Aim: To calculate the Mooney rivlin and Ogden material constants and compare the both using stress-strain data from a Dogbone specimen tensile test with 100 percent strain.  Given data:    Procedure:   1. Importing the dogbone specimen key file and creating shell card with 1.5mm thickness. …

MASS SCALING IN LS-DYNA Aim: To use the mass scaling techniques in explicit and implicit to reduce the run time of the simulation and compare the runtime.  Given Model:    Procedure:  1. Run the simulation without mass scaling.  In this case, the default values of tssfac = 0.9 and dt = -3.500e-05.…

Aim: To perform the head impact simulation using Ls-Dyna and calculate the hic(Head Impact criteria/coefficient) value. Procedure:  Case 1: Impact of simple head form with rigid wall:   1. Creating section shell card:    2. Assigning material card:    3. Assigning section…

Calculate the Stretch Ratio by comparing the ELFORM (-2,-1,1,2) with Ogden_Material Model  Aim: To create a Tensile load simulation using Ls-Dyna and to find the engineering stress, strain and strech ratio of the material.  Procedure:  1. Open the Ogden material .k file.    2. Create a Cube.…

MODELING SPOTWELDS USING LS-DYNA Aim: To model spotwelds for the given assembly with beam and solid elements using LS-dyna. Given Model:    Procedure:  Modeling Spotwelds using Beam elements:  Import the keyword file and create beams using element generation option present in element tools. Create…

CRASH BOX SIMULATION USING LS-DYNA Aim: To perform a crash test of a crash box using Ls-Dyna. Given Model:  Procedure: Creating material:  To create a material card, open keyword manager >> material >> Mat 024. Enter the values as shown below and change the title to crash_box.    Creating…

Week - 3 Drop test Challenge  Aim: To perform drop test simulation on the given mobile model.  Given model:  Procedure:  Creating material:   To create a material card, open keyword manager >> material >> Mat 001. Enter the values as shown below and change the title to mobile. …

SIDE CRASH SIMULATION CHALLENEGE  Aim:  To perform Side Crash test for Car BIW structure using Hypermesh and Radioss.  Objective:  Neon side 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…

FRONTAL CRASH SIMULATION CHALLENEGE  Aim:  To perform Crash test for Car frontal BIW structure using Hypermesh and Radioss.  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…

Radioss interfaces & study of Effect of Notches  Aim: To generate the 2D mesh for the bumper assembly and run analysis on crash tube by using difference contact type and comparing the results.  Given Model:     Procedure:  Case 1: Creating 2D mesh. To create 2D mesh with mesh size…

RADIOSS MATERIAL LAWS CHALLENGE  Aim: To run analysis on the model and observe the elements behaviour by changing material properties in the material card.  Given Model: Procedure:  Case 1: Law2_epsmax_failure.  Import the strater file using the import solver deck option.  Now go to the model,…

Aim: To run simulation on the model with and without the shell element properties and comparing the results between them. Given shell element properties: Procedure: 1.  Run simulation without the element property: Import the crash file using the solver desk.  Changing the run time to 55ms and animation start…

  RADIOSS ENGINE FILE EDITING AND 3D MESHING CHALLENGE Aim: To calculate various parameters of the engine file. Edit the engine file with the obtained values. Perform 3D mesh on the given model. Given model:     Quality criteria:   For 2D mesh: S. No Quality Criteria Value 1. Target Element Length…

ASSIGNMENT 1 – 2D MESHING CHALLENGE Aim: To extract the mid surface and mesh the components for the given models. Given Models:     Quality criteria: S. No Quality criteria Value 1. Target Element Length 5 2. Min Length 3.5 3. Max Length 7   Steps Involved: Importing model and performing geometry…

MESHING OF INNER DOOR PANEL Aim: To extract the mid surface and generate the mesh for inner door panel with in the given quality criteria. Given Model: Procedure: Importing geometry and cleanup. Extracting the midsurface for the geometry. Meshing the geometry within the given quality criteria. Assigning thickness. Quality…

MESHING OF REAR WHEEL HOLDER Aim: To extract mid-surface and mesh the rear wheel (floor panel) model with in the given quality criteria. Given Model: Procedure: Importing geometry and cleanup. Extracting the mid-surface and assigning property. Meshing the geometry within the given quality criteria. Quality Criteria: S.…

CREATION OF 1D ELEMENTS OR CONNECTORS Aim: To mesh the geometry and create the connections between the components. Given model: Steps Involved:  Importing geometry and cleanup. Meshing the geometry with in the given quality criteria. Creating connections between the components. Quality Criteria: S.no Quality criteria…

TETRA MESHING CHALLENGE Aim: To create tetra mesh for the given models with in the given quality criteria. Given Model:    Procedure: Importing geometry and cleanup. Generating tetra mesh using different methods. Checking and rectifying the elements which failed the quality criteria. Quality criteria: For 2D…

PREPROCESSING OF HOOD USING HYPERMESH Aim: To extract mid-surface and generate mesh on Hood using Hyper mesh. Given Model:     Steps Involved: Importing geometry and cleanup. Extracting Mid-surface and assigning properties. Meshing the surface with in the given quality criteria.   Quality criteria: S. No…

1D ELEMENT CREATION CHALLENGE Aim: To generate mid-surface and mesh the model and create 1D elements within the given dimensions and Degree of Freedom (DOF). Software Used: Hyper mesh. Given Component: 1D Elements Criteria: a.Rod element: Translational DOF should be Constrained with RBE2 link        Cross-Section: BOX-…

PREPROCESSING OF REAR SUSPENSION USING ANSA Aim: To mesh the geometry with in the given quality criteria and give connections where ever required. Software Used: BETA CAE ANSA. Steps Involved: Importing geometry and checking geometrical errors. Extracting mid-surface for components with thickness less than 5mm. Meshing…

PREPROCESSING OF IP SUBSTARTE USING ANSA Aim: To extract mid-surface and generate mesh on IP console.  Software Used: BETA CAE ANSA. Steps Involved:   To Import geometry and check for geometrical errors. To extract the mid-surface and assigning PID. To mesh the geometry within the given quality criteria. Quality…

MODIFING THE GEOMETRY USING THE MORPHING TECHNIQUES Aim: To modify the given CAD model using morphing techniques. Software Used: BETA CAE ANSA. Morphing:      Morphing is a technique which is used to modify the geometry without the performing the redesigning work. This will save a lot of time. Steps Involved:…

Providing connections in Rear Door using BETA CAE ANSA Aim: To create necessary connections in the FE model of rear door. Software used: BETA CAE ANSA. Procedure: Assigning PID to different parts of the model: After importing the model into ANSA, the FE model is used to create the connections. Each part is separated using…

VOLUME MESHING OF A REAR-VIEW MIRROR Aim: To mesh the Rear-view mirror using tetra mesh. Software used: BETA CAE ANSA. Steps Involved in meshing a Rear-View mirror: Geometry Cleanup. Surface Meshing. Volume Meshing. Volume Meshing:  In volume meshing the entire volume of the model mesh is generated. when compared…

Creating Mid Surface and Generating Mesh on Hood Using BETA CAE ANSA   Aim: To create a Mid Surface and generate Mesh on hood panel. Software used: BETA CAE ANSA Steps Involved: To check all the Geometry errors and rectify them. To check the thickness of all components in the model. To extract the Mid Surface from the…