Week - 8 Mass Scaling

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 penetration and intersections. Create rigid wall with friction 0.1 as per referance model. Compare the model weight with the referance model and use added…

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 with friction 0.1. Compare the model weight with the full scale 300k nodes…

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 and run.…

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

Objective To perform a simulation of a rigid sphere hitting a plate with all the cases given in the question. Case 1 The simulation was performed with out making any changes to the given file. The objective of the simulation was to perform with both the failure plastic strain(EPS_P_Max) and fail_Johnson failure card enabled.…

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

Objective To perform a 2d mesh on the given three models and to assign the thickness accordingly. Procedure The new HyperMesh file was opened and impoted the given model into the workpage. The model was checked for any discontinuity and an auto clean up can be given if needed. The mid surfaces was extracted by using the…

Objective To perform a bending simulation of an iPhone in the Ansys workbench and to find out the result for the following cases. Case 1: Simulate the model using default materials. Case 2: Move the bottom fingers from their defined position to the given position X= 22.5mm & Z= 10mm and obtain the results…

Objective To perform a bending simulation of an iPhone in the Ansys workbench and to find out the result for the following cases. Case 1: Simulate the model using default materials. Case 2: Move the bottom fingers from their defined position to the given position X= 22.5mm & Z= 10mm and obtain the results…

Objective To perform a explicit analysis of a car crash simulation followed by a parametric study using 3 different values of thickness for the car body and to find out the total deformation and Equivalent stresses acting on the model.  Procedure Preprocessing Firstly, the geometry is imported and checked…

Objective To perform the tension and torsion test on the given specimen and to find out the total deformation, equivalent stress and temperature of the specimen. Procedure  The given model is imported into the geometry and it is checked in spaceclaim for any irregularities. If not, the spaceclaim is closed and the…

Objective To perform an explicit dynamics simulation to find out the Equivalent Stress, Total Deformation and also insert a User defined result to calculate the temperature of the body. The simulation is performed in two cases with two different cutting velocity. Procedure Preprocessing An explicit dynamic analysis is…

Objective To perform a transient structural analysis on a worm gear assembly and to find out the  Equivalent stress, Equivalent elastic strain and the total deformation in the model. Procedure Preprocessing The transient analysis of the worm gear is simulated. The model is imported and it is opened in spaceclaim.…

Objective To perform a transient structural analysis on a double universal joint with a spring using three different materials and to compare the Equivalent stress and total deformation for all the three cases. Procedure Preprocessing A transient structural analysis is done onto the universal joint for three different…

Objective To perform a transient analysis on a piston and cam mechanism model  to find out the directional deformation, strains and stresses by varying the frictional coefficient for three cases and to compare the results. Introduction A transient analysis on the long piston and cam problem is simulated. The geometry…

Objective To perform a sphere pressing simulation using Ansys workbench and to find out the plastic deformation. Procedure A new static structural tab was dragged onto the workbench. From the geometry tab, the given model was imported into it. Geometry was opened in the space claim and checked for any abnormality. Here…

Objective To perform a wire bending simulation using different materials (Copper Alloy, Aluminium Alloy, Magnesium Alloy) in Ansys. Procedure Open the Ansys workbench and drag a static structural module onto the window. Import the model in the geometry tab and open it in the space claim to check for any discontinuity.…

Objective To simulate rolling operation on a workpiece made of copper and to find out the following outputs given below. Equivalent stress for the whole setup Equivalent Plastic strain for the workpiece Directional Deformation in the Z-axis for the workpiece Prove that the workpiece has been displaced 90mm. Procedure Open…

Objective To perform a sheet metal bending simulation as per the cases given below and compared the output results for equivalent stress, equivalent elastic strain, and directional deformation. Case 1 Modeling the sheet with Aluminium Alloy 1199, Copper Alloy NL, and Magnesium Alloy NL. Case 2 With the material as Aluminium…

Objective To perform a static analysis for the model with welded joints using different materials and to compare the results. Case 1.  Stainless Steel: In this case, the material of the plates must also be the same. Use Stainless steel for both weldments and plates. No need to add flux to the weldments. Case…

Objective To perform a static analysis on a Railwheel and Track model following the objective given below. Case 1: Multiply the bearing load by 5 times and compare the results with the load of 100000 N. Compare the Total Deformation, Equivalent stress, and the life under both the loads. Case 2: Implement a User-defined…

Objective To perform a Static analysis with a grid dependency test for the Bevel gear with a global mesh size of 6,5 and 4 mm and to compare the results using Ansys Workbench. Introduction Grid dependency test is to investigate how the solution depends on the grid size by running the simulation with refined mesh that is…

Objective To perform a static analysis on spur gear using three different materials (Cast iron(ductile), Cast steel, Cast bronze) and to find out  Equivalent stress, Total deformation, and Stress intensity also the location of failure. Procedure A new Ansys file was opened and a static structural module was dragged…

Objective To perfrom a static analysis for a plate with a hole with two cases using Ansys workbench and to compare their results for maximum stress and deformation. Procedure Case 1 Ansys workbench was opened and a static structural module was dragged onto the project schematic window. The material for the model can be…

Objective To perform a simulation of bird strike in aero engine using LS-Dyna and satisfying all the required outputs asked for the project. To prepare a main file for the simulation that include all the reference cards. Assign material, sections, boundary conditions and other required inputs to the parts. Follow a consistent…

Objective To calculate the Mooney Rivlin and Ogden material constants and compare both using stress-strain data from a Dogbone specimen tensile test with 100 percent strain. Introduction Hyperelastic materials are the special class of materials that respond elastically even when they are subjected to large deformations.…

Objective To model a material using the given true stress-strain curve of graphite iron casting and validate the data by creating either a MAT_024 or MAT_018 material to the dogbone specimen following other objectives as well which are shown below. Extraction of data from the diagram. Clean the data and match it with the…

Objective To demonstrate revolute, cylindrical, spherical, and translational joints between two rigid bodies also with two deformable bodies using *CONSTRAINED_JOINT keyword. Procedure The revolute joint The revolute joint in ls-Dyna is also called a hinge joint and has only one degree of freedom (Pure rotational motion…

Objective To reduce the runtime of the model using the mass scaling technique and to achieve the following conditions shown below. The hard limit on mass scaling is 8% and stability should be completely intact. The DT and TSSFAC parameters should be optimized. Plot a histogram to compare the runtime with mass scaling trials.…

Introduction Head injury remains one of the most frequent and severe injuries sustained by vehicle occupants, motorcyclists, pedestrians and cyclists in road accidents. One essential requirement for reducing the incidence of fatal and severe head injuries is to develop head injury assessment methods that can accurately…

Objective To create a solid block of given dimension with 10 elements for each directions to understand the uniaxial behaviour and to compare the results for the simulation using ELFORM = 1, 2, -1, -2. Deliverables: An excel sheet with proper conversion and calculation of Stress/Strain and the Stretch Ratio for…

Objective: To perform a simulation between brackets (connected using spotweld) and a rigid wall and to derive the requested outputs. Deliverables: - Input .k file and output files (d3plot, glstat, sleout, rcforc,swforce) - Animation of the final simulation - Plots of Axial and shear force. - Stress-strain plots. - Cross-sectional…

Objective To perform a simulation between a crash box and a rigid wall and to derive the requested outputs. Deliverables: - Input .k file and output files (d3plot, glstat, sleout, rcforc) - Animation of the final simulation - Cross-sectional force generated in the middle of the crashbox (along its length) - Acceleration…

Objective: To perform a complete simulation for a drop test of a cellphone from the given meshed model of a simplified cellphone and a plate mimicking the ground. Procedure: The given model is imported onto the workpage of  the LS-Pre-post using File>Open>LS DYNA Keyword file.       The keyword…

OBJECTIVE: To solve the given equation using implict and explit methods with a residual tolerance of 0.01. Equation: `F(u)=u^3+9u^2+4u` F- Force in the bar, u- Displacement in the bar. EXPLICIT/IMPLICIT METHOD Explicit and implicit methods are mainly used to solve dynamic events with a governing equation `[M]{x''}+[C]{x'}+[K]{x}={f}`. Implicit…

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…

OBJECTIVE: To mesh the given CAD model of a rear suspension by following the quality criteria given in the data and performing connections using suitable conenctors. Quality criteria: Quality Criteria for Tria Elements (Tyre and Rim):  S.No  Quality Criteria  Value  1 Target/Average length  …

OBJECTIVE: To mesh the given CAD model of IP substrate by following the quality criteria given in the data and assigning thickness to it. 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…

OBJECTIVE: To practice basic morphing techniques for the given sheet metal component and discuss its application in industries. PROCEDURE: Geometry cleanup A new .ansa file is opened and the .igs file of the given model is then imported on to the workpage. The model is then viewed in ENT( entity mode) from drawing style…

OBJECTIVE: To give connections for the FE model of a rear door using Nastran deck. Car door A car door is a type of door, typically hinged, but sometimes attached by other mechanisms such as tracks, in front of an opening which is used for entering and exiting a vehicle. A vehicle door can be opened to provide…

OBJECTIVE: To mesh the given component using tetra elements as per the quality criteria given in the data. Quality criteria S.No  Quality Criteria  Value  1 Target/Average length   3 2 Minimum Length  1 3 Maximum Length  5 4 Tetcolapse  0.2 Geometry cleanup and Mid-surface extraction.…

OBJECTIVE: To mesh the given component using tetra elements as per the quality criteria given in the data. Quality criteria S.No  Quality Criteria  Value  1 Target/Average length   1 2 Minimum Length  0.5 3 Maximum Length  2 4 Tetcolapse  0.2 Geometry cleanup and Mid-surface extraction.…

 OBJECTIVE: To mesh the given component as per the quality criteria given in the data and assigning thickness to it. 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…

OBJECTIVE: To mesh the given component as per the quality criteria given in the data and assigning thickness to it. Quality criteria PROCEDURE: Geometry cleanup and Mid-surface extraction. A new .ansa file is opened and the .stp file of the given model is then imported on to the workpage. When imported the model (Hood),…

OBJECTIVE: To mesh the given component as per the quality criteria given in the data and assigning thickness to it. Quality criteria Geometry cleanup and Mid-surface extraction. A new .ansa file is opened and the .igs file of the given model is then imported on to the workpage. The model is then viewed in ENT( entity mode)…

OBJECTIVE: To mesh the side door according to the given quality criteria and assign thickness to the component. Given Quality criteria: Target element size: 4mm PROCEDURE: A new Hyperwoks file is opened and the given model is imported on the workpage.          The model is then checked for geometry…

OBJECTIVE: To create 1D element on the component with different types of given cross section and degree of freedom. Given Specifications: a. Rod element:- With only translational DOF and RBE2 link.     Cross-Section: BOX :     Dimension a= 12 mm     Dimension b=10 mm     Thickness…

OBJECTIVE: To craete connector and attach various parts of the given model as per the given data. Given data 1. Right_Rail_2 & Front_truss_1:- Seam-Quad(angled+capped+L) 2. Left_Rail_2 & Front_truss_1:- Quad elements 3. Front_truss_2, Front_truss_1 & Right_Rail_1:- Spot weld with 3…

OBJECTIVE 1: To create Tetramesh for Housing model according to given criteria. Criteria: Elements sizes: Min- 2mm, Target- 5mm,Max- 7mm, Tet collapse: 0.15 PROCEDURE: A Hyperworks file was opened with Optistruct as user profile and CAD model of housing is then imported into the workpage. View the model in Topoloy…