Week 1 Stress Concentration on a Plate with hole

STRESS CONCENTRATION IN A PLATE WITH HOLE OBJECTIVE 1. To design a plate with hole for the following cases, Case(1): Length=300mm, height=120mm, thickness=30mm, circular hole at the center with diameter=60mm. Case(2): The dimensions are similar to case 1, but additional two smaller holes of diameter=30mm away from center.…

Aim: To perform and simulate the non-linear case of Birdstrike in Aero-engine using explicit analysis in LS-Dyna Objective:  The FE model consists of 4 parts that need to be separated and save part-wise. The suitable material is created and saved in a subfolder The node number, element number, and part number are…

AIM:- To perform Head impact analysis On child pedestrian head Using LS-Dyna and Calculate Head Injury Criterion (HIC) value in different case setups. INTRODUCTION:- Pedestrian safety simulation is a part of vehicle safety engineering. This study focuses on car and pedestrian interaction. The main focus…

Objective: To illustrate the mechanism of spherical, cylindrical, translational and revolute joints between rigid bodies and deformable bodies. The various types of joints can be created in LS-Dyna using the CONSTRAINED_JOINT keyword.   1. Joints between rigid bodies The various types of joints between rigid bodies can…

Hyperelastic Material Models AIM:   To calculate the Mooney Rivlin and Ogden material constants and compare the both using stress-strain data from aDogbone specimen tensile test with 100 percent strain. The given material data is the engineering stress-strain in MPa/(mm/mm). The comparison should be shown from the…

  Aim: To perform the simulation and validate the curve as shown in the figure Objective: Using the given video link, extract the data from the figure, and used it for validation Create a material model for the Dogbone specimen using the diagram of the true stress-strain curve (graphite iron) From the above condition…

  Aim: To perform the simulation by reducing and stabilizing the runtime with the help of mass-scale factor Objective: To understand the motive of a computing time with and without a mass-scale factor  By ensuring the stability of mass scaling at 8%  Comparing implicit vs explicit runtime Mass scaling In…

AIM OF THE PROBLEM Create a block of 10mmx10mmx10mm dimension with 10 elements for each direction. To use appropriate boundary conditions to simulate uniaxial tensile behaviour of a material.  Compare the results for the simulation using ELFORM = 1, 2, -1, -2  by plotting Engineering stress versus Stretch…

AIM:To model spot welds for the given assembly and simulate crash test.Case 1: Beam_Spot_weldCase 2: Solid_Spot_weld OBJECTIVES:• To define spot welds using beam and solid elements.• To create a solver deck to perform the crash test simulation.• To enter the values in g mm ms unit system.• To assign steel material properties…

INTRODUCTION: Crash box is a thin-walled component which deforms axially and absorbs the energy during impact. The crash box is widely used in automobile and aerospace industry to absorb accidental impact energy. This safety component reduces the injuries by accidents and provides more safety to the passengers. Basically…

Aim: To Setup the mobile phone model for drop test using LS-Dyna Objective:  1. To Material creation as per requirement for the different parts. 2. To section creation for solid and shell. 3. To define for Part such as material and section ID. 4. To create Boundary conditions such as construction. 5, To…

AIM:  Introduction to Explicit Methods: The explicit method allows solving problems element by element. Compared with the implicit method, it does not require the general matrix, since the velocity and displacement nodes can be counted directly, using the central difference integration scheme. However, the time step…

AIM : To preform the crash on the roof of the car with an impactor and analysis where stresses are working on it. OBJECTIVE : Roof Crush - BIW Import • Car• Impactor Transforms • This will require (in order)• A 180° rotation about the global z-axis with the point opposite to C as base point •…

AIM : To create a 2D mesh in the side door plastic component according to the quality criteria , and apply thickness to the mesh .  model PROCEDURE : The side door plastic component has many ribs and fillets . these types of plastic component has varying thickness , we need to do 2D shell mesh on the component and…

LS-DYNA doesn't have a default system of units. User needs to input material properties and physical dimensions according to a consistent system of units as per their choice. This warrants that to use LS-DYNA in different circumstances, users has to be conversant with converting quantities from one system of units to another.…

Aim:  To perform Crash test for Car frontal 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 penetration and intersections. Create…

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 O.2 and recommended parameters.  Make sure of no penetrations and intersection.…

OBJECTIVE:  Create the mesh for bumper assembly, mesh size should be 6mm. 2. Run the Crash tube model with 6 different cases as given below and compare.  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…

Objective :  To create a simple drop test simulation using three different materials with the help of Radioss solver and Hyperview.  Mat law 2 Johnson cook.  Mat law 27 Plast_Brit.  III. Mat law 36 Elastic - Plastic.    Explanation of Radioss materials :  These three laws comes under…

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…

Aim: To study about the starter file and engine file in RADIOSS by changing the parameters for the given file And also perform a 3D meshing on the given components of which one will have tetra mesh and the other one will have hex mesh.    Objective      Check the material properties of the rail…

Objective : Clean up geometry.create midsurface and meshing on its as per quality criteria .    methodology :   import a model  create midsurfac  clean up geometry  meshing as per quality criteria  automesh  check the qulity          - free edges…

Aim: To mesh the geometry with in the given quality criteria and give connections where ever required.  1 Importing geometry and checking geometrical errors 2 Extracting mid-surface for components with thickness less than 5mm,  Meshing the mid-surface with in the given quality criteria  Meshing the components…

AIM: Pre-processing of the car instrument panel using ANSA  OBJECTIVES:-  Introduction to shell meshing or 2 D meshing  Topological errors and geometry errors clean-up.  Extracting mid surface with a different method.  Meshing the geometry within quality parameters. Rectifying quality errors ie…

AIM:-  TO PERFORM THE MORPHING TECHNIQUES ON THE GIVEN COMPONENT.   PROCEDURE:- Morphing is used to change the design or shape of the component without using any numerical inputs The following component that we are morphing. In this technique we are using Free Morphing Method mainly known as Box Method. …

AIM:  To perform different types of 1D connections to the Rear door FE model in order set it right for further solving The procedure is described below for the same.  Note: All the connections are to be done in NASTRAN Deck as the solving will occur f Noise, vibration, and harshness (NVH) calculations Then the…

METHODOLOGY:  1 Importing the CAD geometry in ANSA  Checking out the errors and Assigning Property ID (PID) for each surface.  Assigning Quality Criteria  Meshing and Improving Mesh Quality (Ortho Tria & Tria Mesh is used).  Generating Volume Mesh  INTRODUCTION: Keeping safety, strength,…

METHODOLOGY:  1 Importing the CAD geometry in ANSA  Checking out the errors and Assigning Property ID (PID) for each surface.  Assigning Quality Criteria  Meshing and Improving Mesh Quality (Ortho Tria & Tria Mesh is used).  Generating Volume Mesh   INTRODUCTION:  • Keeping…

Objectives:  The objective of this project is to performing meshing for Tool test 1 for component1 & Component 2 using the ANSA tool  From the given Component, Checking geometrical errors and mesh with given element quality criteria  Extracting the mid surface from the component. After meshing the component…

OBJECTIVE : To create a manual mid - surface for the 3D model and generate the mesh . PROCEDURE : SEGREGATING GEOMETRY :  Initially , geometry split into multiple surfaces regarding their geometry  Each surface locked with different views named with their thickness .  Splinted surfaces then corrected for…

AIM: To Perform a preprocessing operation on a given hood model using ANSA.  OBJECTIVE:  1) To check the given geometry for errors and to clean up the errors as requirements.  2) To extract the Mid Surface from all the components.  3) To set the quality parameter and to Mesh element Parameters. …

AIM : To create a 2D mesh in the side door plastic component according to the quality criteria. PROCEDURE : The side door plastic component has many ribs and fillets . these types of plastic component has varying thickness , we need to do 2D shell mesh on the component and asiign the thickness to the elements . before…

Objective :-To Create 1D Connectors in the given component in Hypermesh.  Cad model image :-    Procedure :- Connectors : They are geometric entities ( not FE ) primarily used to create spot and seam welds but also used to create adhesives , bolts , and masses They are simply a database of information defining specific…

(1) Object: - Creating the 3D Tetra mesh for these components Housing and Chassis according to the parameters. In this challenge, we are following the below parameters.  Elements sizes. Min - 3mm, Target - 5mm & 6mm, Max - 7mm.  Tett collapse: 0.15  Procedure: Impor the geometry  Deleting the solid…

Objective : Clean up geometry.create midsurface and meshing on its as per quality criteria .    methodology :   import a model  create midsurfac  clean up geometry  meshing as per quality criteria  automesh  check the qulity          - free edges  …

Objective : Mesh the Given component with the Size of 5 Units. Create 1D elements on the following component with given cross-section and DOF a. Rod element:- Translational DOF should be Constrained with RBE2 link Cross-Section: BOX- Dimension a= 12 mm                  …