week-11 Joint creation and Demonstration

AIM: To perform the Frontal crash analysis of the given Body In White (BIW) component and calculate the cross-sectional forces of the A-pillars, shotguns and rails, accelerometer plots for B-pillars and intrusions in the cabin for nodesPROCEDURE: First import the given RADIOSS file as solver deck and the check the…

OBJECTIVE:  (1) To mesh the bumper with mesh size 6mm and spot weld at the mentioned places. (2) To Run the simulation of the crash tube using the given conditions and compare the results.PROCEDURE: (BUMPER MESHING)Import the bumper file into the Hypermesh using the import model and check for any solids…

AIM: To run the different material models on the plate when the solid rigid sphere hits the plate and check the variation in results. PROCEDURE:  Case 1:  First FAILURE_JOHNSON model is imported using the solver desk imported into the HYPERMESH software and run the same file using the ANALYSIS-->Radioss…

AIM: For the given simulation of radioss, run it as per the given properties and simulation time and compare the energy error, mass error, total energy, internal energy, hourglass energy, contact energy and rigid wall forces. PROCEDURE:  Import the crashbeam file into the Hypermesh using the import solver desk.…

AIM: Edit the engine file which is given for the challenge according to the questions given above. ANSWERS:  1. The material properties for the steel are given in the file and shown in the below image. Youngs modulus E=210000MPa, Density ρ=0.0078. Speed of sound in steel c= √(E/ρ)= …

AIM: The main aim of this challenge is to clean the geometry, extract the midsurface, mesh the component, and assign the thickness to the component by choosing the appropriate property. PROCEDURE:  First, import the given geometry into the HYPERMESH, then check if there are any solids inside the model; if they…

AIM: For the given side door panel extract the midsurface and mesh it according to the given quality criteria and assign the thickness to it. PROCEDURE:  First, import the side door panel into HYPERMESH and check if any solids are present. If there is a solid, delete it and start extracting the midsurface. For…

AIM:  To create the model in LS-DYNA how a bird hits the aero engine and what its effect is on the aero engine. Based on the properties given for the blades, casing, bird and hub create the material models accordigly. A consistent numbering system should be used on the parts, nodes, elements,etc., Initial velocity…

AIM: To perform the head impact simulation from a simple ball and rigid wall to head foam and Hood, check the stresses that are developed on the hood and head foam, also calculate the Head Injury Coefficient (HIC). PROCEDURE:  CASE1:  First open the keyword file of simple head model and apply material properties…

JOINTS: There are different number of joints that are using in the industry. They are  Revolute Joint. Spherical Joint. Cylindrical Joint. Translational Joint. AIM: To create the Different joints in LS_DYNA and simulate them and show the animations of the joints with Rigid bodies and Deformable bodies. PROCEDURE: REVOLUTE…

Hyper Elastic Material: General elastic material behaves elastically around 0.02 to 0.2% of strain but the Hyperelastic materials behave elatically around 500% of strain. These will behave lineat for some part and non-linealy for the remaining part of elasticity. AIM:  To model the Dog bone specimen using the Hyperelastic…

AIM: This challenge main aim is to create the material model out of the graph given using the MAT_024 and use this material in the dog bone specimen. PROCEDURE:  First the material data curve is taken into plot digitizer website and given the X and Y extreme co-ordinates, then we need to pick the points on the curve atleast…

AIM:  By using the mass scaling we need to reduce the run time of the explicit simulation for the given model. For the same model the implicit analysis is run and compare the run times of both implicit and explicit analysis. PROCEDURE:  The model is imported into the LS-DYNA and check the keyword in the file. Here the…

AIM: To Calculate the Stretch ratio for different element formulations for the Odgen Material model. PROCEDURE:  Download the odgen Material model file and open in the LS-Prepost, in that all the properties of this hyperelastic model is given. Then create the cube with 10x10x10mm with 10 divisions on each side, cube can…

AIM:The analysis has to be carried out for the mobile casing and calculate the required outputs like stress generated when it is impacted, velocity variation at the time of impact.  PROCEDURE:  First the model is downloaded and check if any extra parts are available or not other than the mobile case and ground…

EXPLICIT ANALYSIS: The explicit analysis needs very small step to be stable, i.e., time step to be less than the courant_friedrichs-levy-criterion. This explicit method calculates the state of the system for the later time from the current time. This kind of analysis is used in different applications like crash analysis,…

Conversion of SI units to gm-mm-ms. Mass 1kg in SI units, 1000gm im gm-mm-ms unit system Lenght 1m in SI units, 1000mm im gm-mm-ms unit system Time 1s in SI units, 1000ms im gm-mm-ms unit system Force is 1N i.e., 1kg-m/(s^2), => 1000*1000/(1000^2) gm-mm/(ms^2) =1 gm-mm/(ms^2). Stress is 1Pa i.e., 1kg-m/((m^2)-(s^2)), =>…

AIM: Model the spotweld using the beam and solid elements and compare the results.  PROCEDURE:  First the download the model and open the keyword file and check what are the keywords in the keyword manager. Then from the element generation option the beam element is created based on the given location in…

AIM: To do the crash box simulation based on the given conditions and calculate the stresses and displacements and plot the energies. PROCEDURE:  Import the model into the LS-DYNA, that model is having the cad model and meshing. The material properties has to be created first with dimensions gm-mm-ms with elastic steel…

OBJECTIVE: For the given model the meshing has to be done as per the given criteria and do the specified connections. PROCEDURE: First the model is imported into the HYPERMESH and then based on the given names we have to rename them. Then we have to mesh all the components and set the quality criteria based on the…

OBJECTIVE: For the given models the geometry cleanup and the tetra meshing has to be done as per the given criteria. PROCEDURE:  MODEL1:  First the given model is imported to HYPERMESH the crteria given should be added in the criteria file settings in preferences. Then delete the solids by using the delete…

OBJECTIVE: The aim is to extract the midsurface and mesh the given component. PROCEDURE:  First import the given component into the hypermesh. The geometry clean up should not be done on the parent geometry, directly extract the midsurface either by using the midsurface option in geometry module or we can use…

OBJECTIVE: The aim is to develop the midsurface and then mesh the given component as per the given criteria.  PROCEDURE: First the given cad model is imported into the HYPERMESH module and check if we can do any geometry clean up, it is not advisable to do geometry cleanup on the main component. Directly get…

AIM: For the given component backdoor midsurface is extracted and meshing is to be doneas per the quality criteria. PROCEDURE: The model is imported into the hypermesh by using the import geometry. Then the keep all the components into single component collector by using the organise option in the tool module. There…

OBJECTIVE:  The midsurface extraction and meshing is to be done using the HYPERMESH and assign the elemental thickness to all the four components. PROCEDURE:  The hood is imported into the HYPERMESH using import module. Then the geometry cleanup has to be done by removing the unwanted lines by using the toggle…

OBJECTIVE: The given model is meshed with given size and assign the 1D elements. PROCEDURE:  First the IGS file is imported into the hypermesh software by using the import geometry. Then extract the midsurface from the geometry module and midsurface extract.  Then after extraction of midsurface the use the…

AIM: The meshing has to be done for the given instrumentation model by using the any method either by manual method, Casting and batch meshing. PROCEDURE:  The instrumentation panel is imported into the ANSA and check for any geometry errors. Clear the geometry errors and then do the topo clean up. After the…

AIM: The morphing has to be done for the given models as per the suggested shape changes. PROCEDURE:  The model is imported into ansa and check for the geomtry errors for the model-1. After checking for the geometry errors based on the video the morphing is done. First the ribs are selected and create a new morph…

AIM: Create the connections for the rear door model wherever it is required using the bolted joints, welded joints, CBUSH connection and conn mass. PROCEDURE:  Import the FE rear door model into the ansa. Then based on the geometry model indications we need to apply the connections wherever required. The bolted…

intake manifold time for meshing is 5 hours.

AIM:  The 3D model is taken and TETRA meshing is performed using the VOLUME mesh module. Import the model into the ANSA software, then use TOPO option to combine all the RED CONS to get YELLOW CONS Then check for any geometry errors and in the model, if there are any errors use the AUTOFIX to fix all the geometry errors. …

model 1 : 10hrs( manual mid surfacing) model 2: 2 hrs ( auto mid surfacing)

The bottle cap is imported to ANSA then check for the geometry errors. The geometry cleanup is done using auto fix.  After the geometry clean up is done, i have tried to get the auto midsurface from ANSA, proper faces are not generating, So i have used the manual mid surface. After the mid surface extraction the average…