Hyperelastic Material Modeling

  PROCEDURE: CREATE RIGID WALL: In Hypercrash: Load case - rigidwall - create - plane Specify the tail and vector normal of the rigidwall by selecting nodes at the front bumper Set ~200mm distance apart from node on car model Set frictional coefficient as 0.1 With a search distance of about ~2000mm from the rwall…

AIM: To shell mesh a bumper model Modifiy contact interfaces for crash tube model Modify geometry of crash tube model and run using non-linear radioss solver   PROCEDURE: MODEL-1 1. Import the geometry or hypermesh file 2. View the model in Topo mode 3. Do the following for geometry cleanup prior to meshing remove…

OBJECTIVE: To perform a simulation involving a solid spherical ball rupturing a shell plate. The shell plate is modeled with different materials and different failure modes. The following modifications are to be made: - /FAIL/JOHNS card modified to crack plate - Delete  /FAIL/JOHNS card - EPS_max deleted - Law 2 johnson-cook…

OBJECTIVE: To perform 2 test cases of a crashbox simulation involving different element formulations and other parameters thereby comparing results acquired from either cases.   INTRODUCTION: Hourglass effect Hourglass modes are non physical modes of deformation that occur in underintegrated elements and produce no…

OBJECTIVE: To modify the parameters in a Starter and engine file. To generated volume meshing on two components - Housing, Arm bracket     PROCEDURE:  1. Calculate the speed of sound in rail: The speed of sound over a material can be calculated by, `c = sqrt(E/rho)` where, E - Young's modulus or modulus…

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                                                                        BEVEL GEAR SIMULATION   OBJECTIVE: To perform contact simulation and to perform a grid dependency test on two bevel gears to determine the Equivalent stress, Total deformation, and Stress intensity and to determine if any possible fracture could occur…

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                                                                         Stress Concentration on a Plate with hole   OBJECTIVE: To…

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                                                                           The meshing of Door Inner Panel   OBJECTIVE:…

                                                                          Creation of 1D Connectors    OBJECTIVE:To mesh…

                                                                          3D Tetra Meshing Challenge   OBJECTIVE: To pre-process…

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                                           PRE-PROCESSING A BRACKET MODEL   AIM: To preprocess the given bracket model by extracting it for mid-surface and then meshing using shell elements and finally creating…

 AIM The aim of this project is to perform pre-processing operations on a rear suspension model of an automobile. Pre-processing stages include geometry cleanup and topology optimization followed by mid-surface extraction if required post to which the model is meshed either using shell or volume mesh based on the…

AIMThe objective of this tool test is to perform a mid surface extraction of the component and successfully create a finite element model of it and furthermore refining the mesh such that it validates every quality criteria set.  Tool tests are usually required to be completed within a given period. Hence timing the…

AIM: The aim of this project is to deploy necessary connections like bolts, hinges, weldments using the in-built NASTRAN Deck which is profoundly used for NVH analysis.   INTRODUCTION: In few cases, the CAD data and files may contain the model of bolts, weldments etc. yet they don't actually imitate the required purpose.…

AIM: The aim of this project is to create a solid mesh for an intake manifold model using tetra mesh elements post to topology cleanup. This meshed finite element model is then checked for volume mesh quality criteria and if required refined to generate more appropriate mesh elements that could pass the required quality…

AIM: The aim of this project is to create a solid mesh for a rearview mirror model purely using tetra mesh elements post to topology cleanup. This meshed finite element model is then checked for volume mesh quality criteria and if required refined to generate more appropriate mesh elements that could pass the required…

TOOL TEST -1   OBJECTIVE:The objective of this tool test is to perform a mid surface extraction of the component and successfully create a finite element model of it and furthermore refining the mesh such that it validates every quality criteria set.  Tool tests are usually required to be completed within a given…

PRE-PROCESSING OF A BOTTLE CAP   AIM: The aim of this project is to do a geometry cleanup and to generate a 2D mesh for the mid-surface extracted from the plastic component. Furthermore, mesh refinement is done so as to satisfy certain mesh quality criteria.   PROCEDURE: 1. Importing CAD: The CAD geometry designed…

PRE-PROCESSING THE HOOD OF A CAR   AIM: The aim of this project is to do a geometry cleanup and generate a 2-D mesh on a hood component of a car. In order to achieve a clean mesh-flow, the mesh is refined after successful mesh generation on the component while satisfying certain mesh quality criteria.   INTRODUCTION:…

BIRD STRIKE ANALYSIS AIM  To perform a bird strike simulation involving a cylindrical shell object which is modeled to reference the bird against an airplane engine whose blades are rotating at subsonic speeds. Hence to study the effect of bird strikes upon engine blades during impact.   INTRODUCTION Jet engines…

JOINT CREATION: AIM:The objective of this project is to create different types of joints namely translational, revolute, cylindrical, and spherical, or a ball joint. These joints are created between two rigid or deformable bodies. In LS_DYNA it is not required to model the joint in its physical form i.e the geometry of…

HYPERELASTIC MATERIAL MODELING: INTRODUCTION: Material modeling is a widely performed process in industries. This process involves testing new material or alloy and modeling this material through the extracted test data and validating it with the test data and thus the material can be further used in later stages of the…

MASS SCALING: OBJECTIVE: The objective of this project is to simulate a highly non-linear transient dynamics problem or any other type of analysis that would be computationally intensive. Since our example problem would be computationally expensive it would also be more time consuming provided the memory usage is well…

MATERIAL MODELING FROM RAW DATA: INTRODUCTION: Material modeling is a widely undertaken process in industries. This process involves testing of new material or alloy and modeling this material through the extracted test data and validating it with the test data and thus can be used in later stages in simulation. Material…

HEAD IMPACT SIMULATION OVER A RIGIDWALL AND CAR HOOD   INTRODUCTION: A subpart of a Crash analysis performed in major industries is pedestrian safety and protection. In this Vehicle safety engineering field, the engineers are required to design the automobile especially the front half i.e the bonnet and car hood in…

STRETCH RATIO COMPARISON BY DIFFERENT ELFORM:   OBJECTIVE: The objective of this project is to create a cube of dimension 10x10x10 (mm) modeled using a solid element and Ogden Rubber, a hyperelastic material. Upon this model, a tensile force is applied as a loading condition while the other end is constrained in space…

MODELING SPOTWELDS   INTRODUCTION: Spotweld is an electrical resistance welding technique used to weld, on most occasions, sheet metals together by adjoining the contact surfaces using the heat obtained from electric current in the electrode. Spotwelds can be modeled in LS-DYNA using specific keywords in-built in…

DROP TEST ON DIFFERENT MATERIALS: INTRODUCTION: Drop test is a type of impact simulation which takes place at a fraction of seconds. This type of simulation is performed either to determine the weak points of a cellular phone or in this report, what effect arises when the desired object falls on different objects which…

CRASH BOX SIMULATION: INTRODUCTION: A Crash Box is a structure that is capable of absorbing high energy during impact thereby reducing the damage that could occur to the object or component it is integrated with.  The most common use of a crash box is for its application in automobiles. The Bumper of a car attached…

EXPLICIT AND IMPLICIT ANALYSIS   AIM: The aim of this project is to compare the difference between Explicit and Implicit solver methods and to determine which provides the most feasible solution by solving them numerically. To achieve this, we perform a Non-linear static analysis on a bar element constrained…