WEEK 3 CHALLENGE AIM To generate the mid surface of the given model and generate a mesh according to the required quality criteria. PROCEDURE Geometry cleanup is performed on each part to check for triple cons, single cons, cracks, unchecked faces, etc after which we can move on to generating the mid surface. Measure the…

WEEK 4 CHALLENGE AIM To generate the mid surface of the given model and generate a mesh according to the required quality criteria. PROCEDURE Geometry cleanup is performed on the after which we can move on to generating the mid surface. The thickness of each part is measured and then stored. For midsurface generation,…

off elements in panel model are considered unsolvable due to multiple triple cons near them

WEEK 5 CHALLENGE AIM To generate tetra mesh of the given model using ortho tria and tria elements followed by generating a volumetric mesh according to the required quality criteria. PROCEDURE Geometry cleanup is performed on after which we can move on to tetra meshing. Check Geometry is performed to check for geometrical…

Tool Test 2Unstructured Tetra Fem was used Element Length:3Min Length:1Max Length:5Collapse:0.2 

WEEK 6 CHALLENGE AIM To deploy connections on the given FE model for NVH Simulation according to Nastran Deck. PROCEDURE Since we are given the FE model, we deploy independent PIDS to each Pid region. First, we start with the door hinge, we deploy Rbe2 many node connections for rigidity on the hinge and then connect the…

MORPHING AIM To modify the given cad data using the morphing module in Ansa. PROCEDURE To create a new morphing box we go to the morph module and select new under boxes. Then we select the features that we need to morph and middle-click as shown.     Once the morphing box is formed we select move under box morphing…

2D MESHING ON INSTRUMENT PANEL AIM To generate the mid surface of the given model and generate a mesh according to the required quality criteria. PROCEDURE Measure the thickness of each part and store the measurements. Check geometry for errors like unchecked faces,etc. For mid surface generation, manual mid surfacing…

WEEK 6 CHALLENGE AIM To mesh the given rear wheel assembly model, with tetra and 2 D elements, and deploy connections for the components. PROCEDURE It is observed that most components in the model have a very large thickness, so we will proceed with generating a mesh with tetra elements for most of the component. We split…

CHALLENGE AIM To mesh the given component with a target element length of 5 units and to create 1 D connections as specified. PROCEDURE First, we create the mid surface of the given component with the auto mid command.Figure1Figure 2 We create new material for steel and assign it the Mat1 card image.Mat1 card gives the…

Week 6 Challenge Aim To create the mid surface of the given component and mesh it according to given criteria. Procedure Determine the thickness of the components using the distance command and assign property thickness Generate the mid surface of each component individually using auto mid command with different component…

TETRA MESHING IN HYPERMESH Aim To mesh the given components with tetra elements using various hyper mesh options. Procedure For the first model, we first create a 2d mesh on the surface of the component and then generate a tetra mesh for the component. For meshing, we use normal tria elements for flat surfaces and ortho…

Connectors in Hyper Mesh Aim To mesh the given model according to given criteria and create connections as required. Procedure Criteria for mesh quality is given in table1. S.N Quality Criteria  Value  1 Aspect Ratio  5 2 Skewness 45 3 Warping 15 4 Taper      0.5 5 Min. Length 2…

Meshing Of Rear Wheel Holder Aim To mesh the given rear wheel holder model according to the given criteria Procedure It can be observed that the given model has a lot of free edges on the surface. Figure 1 These free edges can be solved if they are simple but if it is a tedious process, it can be faster to simply ignore…

Side Door Aim To mesh the given side door model according to the given criteria Procedure Before we can mesh the model, it is necessary to prepare the mid surface of the given model As this is a model with several surfaces having a varying thickness, we will need to manually extract the mid surface for several components…

Assignment 1 Aim To create and mesh the mid surface of the given models Procedure It is mentioned that holes less than 5mm in Diameter can be ignored. Criteria given in Table 1 Min Length 3.5 Max Length 7 Holes<5mm in dia can be ignored`     So in parameter file settings if we change the range to 2.5 mm on…

Assignment 2 Objective To 3D mesh the given components To modify the .rad file and calculate timestep Procedure Given Density =0.0078 g/mm3 Youngs Modulus E=210Gpa Speed of Sound = `sqrt (E/rho)` Applying the values to the formula above, we get the speed of sound as 164.08 mm/s The length of the rail is 1000mm The…

Assignment 3 Aim To compare the results of simulation before and after property assignment for the given crash beam file Procedure Import the .rad file to hypermesh Figure 1 Change the tstart to 25 ms in Eng_Anim_Dt and Tstop in Eng_Run to 55ms Figure 2 Figure 3   After making the changes,export the file to a separate…

Assignment 4 Aim To compare and analyze the rupture plate simulation using different material properties Procedure Import the failurejohnson_000.rad file to hypermesh Figure 1 After this, export the file to a new folder Figure 2 An alternative is to simply name the file appropriately with a _0001.rad end so that radioss…

Assignment 5-RADIOSS Interfaces & Study of Effect of Notches Challenge Aim To mesh the given model with a mesh size of 6mm To create different interfaces with recommended properties and compare the simulation results Theory Interfaces are defined to model how parts interact when they come in contact with each other…

Project 1 Front Crash Simulation Aim Frontal crash simulation of the given Fe Biw Neon Model using Hypermesh/Radioss Solver. Setup Requests 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…

Side Crash Simulation Aim To perform side crash analysis on the given Dodge neon Biw model using Hypermesh and Radioss solver. Setup Request Check unit system and either follow [Mg mm s] or [Kg mm ms]. Create an appropriate interface ,friction 0.2 and recommended parameters. Make sure of no penetration and intersections.…

Challenge 1 Objective: To convert the given values from Si units to various other unit systems Solution Value of the following measurements are given as follows: MASS 1kg LENGTH 1m TIME 1s FORCE 1N STRESS 1Pa ENERGY 1Nm DENSITY 1Kg/m3 YOUNG'S Modulus  210GPa Velocity 56.33KMPH GRAVITY 9.8m/s2 Conversion From…

Challenge 2 Aim: To solve the equation, F(u)= u3+9u2+4u, using Implicit and Explicit Methods. Theory Implicit Analysis One method of solving for the unknowns {x} is through matrix inversion (or equivalent processes). This is known as an implicit analysis.  When the problem is nonlinear, the solution is obtained in…

Drop Test Aim To perform a simple drop test simulation on the given model Objective To create all the necessary keyword files for a basic simulation in ls Dyna Theory Element Formulation  Element formulation deals with derivations needed to deduce displacements acting on a body when discretized by finite elements.…

Crash Box Objective To simulate a crash test on the given simple crash box component  Conditions - Material for the crash box is steel. The simulation needs to be started using elastic material to verify its correctness and later a nonlinear material card data will be provided. The thickness of the crash box is 1.2mm.…

SpotWelds Objective To simulate a crash test on the given assembly of components and compare the difference in using solid and 1D beam elements for spot Weld  Conditions - Material for the assembly is steel - Initial velocity for the assembly should be around 50 kmph - The units system to be used is gm-mm-ms  …

Odgen Material Model Objective To simulate a tensile test on a 10x10x10mm cube using the given Ogden material card and compare the difference in using Elform 1,-1,2 and -2 property.  Condition - Stretch Ratio of at least 5 should be achieved - The units system to be used is gm-mm-ms       Deliverables:…

Head Impact Objective To simulate a head impact test and calculate Head Impact Criterion for the following cases: Simple Head Model and rigid wall Pedestrian Headform Model and rigid wall Pedestrian Headform model and meshed hood model   Deliverables: The impact simulation of a simple head impact with the Rigid wall. The…

  Mass Scaling Aim To understand the effect of mass scaling on simulation run time and stability in Ls Dyna The difference in the explicit and implicit analysis of the same simulation Theory Mass-scaling refers to a technique whereby nonphysical mass is added to a structure to achieve a larger explicit timestep. Anytime…

Material Modelling Objective To derive the data from the given stress vs strain curve Model the given tensile test specimen according to the derived data and compare the stress vs strain curves  Condition -  the elastic modulus is 20.9E+06 psi. or 114.1 GPa - The units system to be used is kg-mm-ms    …

Hyperelastic Material Modelling Objective To compare data from the given engineering stress vs engineering strain for a hyperelastic material to the fitted data.  Condition -  Vary the constant n=1,233 for hyperelastic and Ogden material model. - The units system to be used is kg-mm-ms   Theory The hyperelastic…

JOINTS Aim To create translational, revolute, spherical and cylindrical joints for rigid and deformable bodies using Ls-Dyna. Theory Revolute Joint. Nodes 1 and 2 are coincident; nodes 3 and 4 are coincident. Nodes 1 and 3 belong to rigid body A; nodes 2 and 4 belong to rigid body B. The relative motion of the two rigid…

BIRD STRIKE Aim: To perform bird strike test on the given engine model Theory Bird strike A bird strike is strictly defined as a collision between a bird and an aircraft that is in flight or on a takeoff or landing roll. The term is often expanded to cover other wildlife strikes - with bats or ground animals.…

Stress Concentration on a Plate with hole  Objective  To compare the deformations on a simple steel plate with a single hole to that with smaller holes for stress concentration control  Procedure  Create a new static structural project in workbench  Make sure structural steel is selected in engineering data  Create the…

SPUR GEARS  Aim:  To set up a simple spur gear system using 3 different materials , Bronze cast iron and cast steel, and determine the best material to proceed with for manufacture  Theory  Spur Gears Spur gears are one of the most popular types of precision cylindrical gears. These gears…

GRID DEPENDENCY TEST ON BEVEL GEAR  Aim  To model a simple bevel gear system and perform grid dependency test at mesh size of 6mm ,5mm and 4mm.  Theory  Bevel gears are power transmission parts first employed to modify the direction of shaft rotation and to reduce the speed and improve the…

Railwheel and Track Aim To setup a given railwheel and track model to check for deformation,strain and life under 2 different loads Theory A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks. The wheel acts as a rolling component, typically pushed onto an axle and mounted directly…

SHEET METAL BENDING Aim To setup a given sheet metal bending process and compare the difference using 3 material models. Theory Bending is one of the most common sheet metal fabrication operations. Also known as press braking, flanging, die bending, folding and edging, this method is used to deform a material to an angular…

WELD JOINTS Aim To setup a 3 different types of welding for a load of 15000 and determine the directional deformation, strain and stresses involved Case 1: Weld Material Stainless steel, material of plates and ribs is also stainless steel Case 2:Weld Material: Aluminium wrought alloy, material of plates and ribs is stainless…

SHEET ROLLING  Aim To model a simple sheet rolling system and determine the thickness reduction, stresses on sheet metal and deformation.   Theory In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness, to make the thickness…

WIRE BENDING Aim To model a wire bending system and determine strains and stresses on the wire   Theory Wire forming is a method for applying force to change the contour of wire by bending, swaging, piercing, chamfering, shearing, or other techniques. The various techniques for wire forming can produce any type of…

SPHERE ON PLATE Aim To model a sphere pressing on plate setup and observe plastic deformation.   Procedure Start a new static structural model in ansys and import the model Add the nonlinear materials of structural steel non-linear. Open this model in ansys mechanical. Check that the materials were properly assigned…

WIRE BENDING Aim To model a bending of a phone model and determine strains and stresses on the wire     Procedure Start a new static structural model in ansys and import the model Add the nonlinear materials of aluminium alloy , general material polyethelene, duplicate it and modify the property to be similar…

Slider-Crank        Aim To model a slider crank system and determine strains and stresses on the clip.   Procedure Start a new transient structural model in ansys and import the model Add the materials as shown (for the second case). Open this model in ansys mechanical. Define the…

Worm Gear         Aim To model a worm gear system and determine strains and stresses   Procedure Start a new transient structural model in ansys and import the model Open the model in space claim and cut the gear in half so as to meet the academic node and element limits Open…

Machining-Planar        Aim To model a simple machining model system and determine strains and stresses.   Procedure Start a new explicit dynamics model in ansys and import the model Add the materials as shown. Open this model in ansys mechanical. Assign Steel-1006 to the workpiece…

Machining-Planar        Aim To model a simple machining model system and determine strains and stresses.   Procedure Start a new explicit dynamics model in ansys and import the model Add the materials as shown. Open this model in ansys mechanical. Assign Steel-1006 to the workpiece…

Bucket-Bullet      Aim To model a simple bucket-bullet system and determine strains and stresses.   Procedure Start a new explicit dynamics model in ansys and import the model Add the materials as shown. Open this model in ansys mechanical. Assign Tantalum to the bullet and Aluminium Alloy/Magnesium…

Car Crash   Aim To model a car crash  system and determine strains and stresses.   Procedure Start a new explicit dynamics model in ansys and import the model Add the materials as shown. Open this model in ansys mechanical. Assign Stainless steel NL to the car body and a thickness of 0.3mm.   (P…

Cam model Aim To model a cam system and determine strains and stresses.   Procedure Start a new transient structural model in ansys and import the model   Open this model in ansys mechanical. Check that the materials were properly assigned to the model. Set the contact to rename based on definition and select…