Week - 1 - Consistency of Units

#5 // Week - 4 _ Crash Box Simulation.   AIM: To extract the model into LS-DYNA, and to create all the required keywords into the model, by creating a Rigid wall in it, with a crash velocity of 50 kmph which is 13.89 mm/ms, with two different thicknesses needed to be assigned.   Set-up: A crash box…

Aim: This challenge is about simulating the drop test of the cell phone falling in the rigid plate using the LS-DYNA. By using proper parameters and plotting into graphs. Procedure: The model which I received is in .K file format, which is Keyword file. To open this file, we LS Prepost and in that we need to add proper…

OBJECTIVE:  To convert given measurement values to different unit systems and write its conversion factor. Measurements: MASS 1kgLENGTH 1mTIME 1sFORCE 1NSTRESS 1PaENERGY 1NmDENSITY 1 kg/m3YOUNG'S Modulus  210GPaVelocity 56.33KMPHGRAVITY 9.8m/s2 Unit systems: gm mm ms Kg cm ms Kg cm s kg m s g cm s g cm us g mm s ton mm…

Aim: Create the mesh for bumper assembly, mesh size should be 6mm.  Run the Crash tube model with 6 different cases as given below and compare. Objective: 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…

AIM: To run crash analysis on the given model by applying different materials laws available in Radioss and post-process the results Objective: To carry out simulations of the given starter files and compare the results. There shall be 7 cases (according to given parameters) and they are to be compared primarily via animations…

Case 1: At the end of simulation, maximum Energy error is = -10.3% and mass error is =  0.1659E-03 Case 2: At the end of simulation, maximum Energy error is = -0.1% and mass error is =  0.1659E-03   Inference: Case 2 provides better results for energy error. That is energy error is reduced for 2nd case.…

Speed of sound in steel rail = 5188.7852 mm/ms Time taken by shock wave = 0.1927 ms Time for sound to travel length of rail = 0.1927 ms   1. Introduction Radioss is an explicit solver widely used in crashworthiness analysis for passenger cars. The input file for the radioss solver is written…

Aim: To Mesh the given component and assigning the thickness to the component by giving the target Element size as "5 units".  Target Element Length : 5 Units  Minimum Length : 3.5 Units Maximum Length : 7 Units    Radioss:  Set the user profile to Radioss.     Import the geometry…

OBJECTIVE: Importing rear car suspension geometry into ANSA. Clean up the geometry until no topological error is found. Generate mid surface for required parts. Generate volume mesh for hollow parts. Improve the mesh flow and solve off elements according to given quality criteria. Give connections for rear suspension for…

OBJECTIVE: Importing Instrument panel geometry into ANSA. Clean up the geometry until no topological error is found. Generate mid surface for the whole component including features. Mesh the component using manual mesh with given quality criteria. Improve the mesh flow and solve off elements.   PROCEDURE: Step 1: Import…

Objective: To practice all the Morphing techniques and to increase the height of the doghouse and ribs.   Procedure:   Model1: Go to Morphing module and create a new ortho box Select the surfaces which has to be morphed Click on align and select the orientation to orient the box accordingly Go to Box Morphing…

Objective: To create and apply different PIDs for different components and to perform suitable connections.   Procedure: Choose each of the parts by PID region and assign a new PID. (Topo module - Set PID) Parallel holes have to be connected by bolt joint: Manual method: Create RBE2 clusture of elements from Nastran…

Completed.

Objective: To check for the geometrical errors and mesh the Surfaces with the given 2D element Quality criterias and to use tetra elements to mesh the Volumes defined in the model.   Procedure:  Geometric clean up (Fix the single cons and missing surfaces) Toggle the unwanted edges (Topo Module - Faces - Cut right click)…

Completed.

Objective: To take the mid surface and checking for geometrical errors. To mesh the mid surface with the given element Quality criteria and to assign thickness.   Procedure:  Geometric clean up (Fix the single cons and missing surfaces) Toggle the unwanted edges (Topo Module - Faces - Cut right click) Take midsurface (Topo…

Objective: To take the mid surface for all the components of the hood and checking for geometrical errors. To mesh the mid surface with the given element Quality criteria.   Procedure:  1. Latch: Take midsurface for the latch (Topo Module - Mid surface - Skin) Change the element criteria as per the given problem…

Objective: To create midsurface and generate mesh on the component satisfying the element criteria and assign thickness.   Procedure:  Generate auto midsurface (Geometry - midsurface - auto midsurface) Correct and fix for topology   Defeature the buttons to avoid element failure (Delete the surface - then use filler surface…

Objective: To generate midsurface and generate 2D mesh with the criteria mentioned and assign thickness.   Procedure: Measure the offset distance by projecting and duplicating a point in the gap region (tool - project - point - duplicate - select the surface and measure the distance) Offset the component 1 to distance…

Objective:  To mesh the given geometry with the given quality criteria and create the given connectors.   Procedure: Generate 2D mesh for the given components and rectify the mesh for better quality. For Seam-Quad(angled+capped+L): (1D - Connectors - Seam - Quad(angled+capped+L) - select edge nodes) For Quad elements: (1D…

objective: To create Teramesh for the given components and satisfy the given quality criteria. Model 1:  Procedure: Do geometry cleanup Create 2D triangular mesh on the surface, check and fix for minimum and maximum length criteria. Generate 3D tetra mesh (3D - tetramesh - Tetramesh - elements - displayed - mesh) Check…

Objective: Generating midsurface and doing geometry cleanup. To mesh the surface and satisfy the given quality criteria. Procedure:  Latch reinforcement:  Delete the solid and generate auto midsurface  Change the element criteria as per the given problem (Preferences - Criterial file settings) Change the…

Objective: To Mesh the Given component with the Size of 5 Units. Create 1D elements on the following component with given cross-section and DOF. Procedure:  Create the midsurface for upper and lower bracket (Geometry - auto midsurface and select upper solid - extract) Click return and create a new component and create…