Bird Strike - Project - 2

    Week 1-2D Meshing Challenge   Objective   Carry out a geometry cleanup and 2D meshing of the following sheet metal components:     The 2D mesh should have a target length 5mm, minimum of 3.5mm and maximum of 7mm   There should not be any free edges in the final mesh   Ignore all the holes with a diameter less than…

Bird Strike - Project - 2   Background:   Bird strikes and bird ingestion events are a significant concern in the aviation industry, occurring approximately once every 2,000 flights in the USA alone, as estimated by the Federal Aviation Administration (FAA). Which, leads to significant monetary losses in the…

Joint Creating and Demonstration   Objective   Create a revolute, spherical, cylindrical and translation joint between two rigid and two deformable bodies using LS-Dyna   Background   Mechanical joints play a vital role in various fields of engineering such as robotics, machine elements and even automotive/aerospace…

Hyper-elastic Material Models     Objective   Given raw material data, calculate the Mooney Rivlin and Ogden material constants Validate the both models using a tensile test simulation with a 100% strain value   Background     Hyper-elastic materials, also known as elastomers, are characterized…

Material Modeling From Raw Data   Objective     Create a MAT024 material card from raw data Validate the material card using a uniaxial test simulation     Procedure   The first step into creating a MAT024 material card is to obtain the stress-strain data  from a uniaxial test of a material,…

Challenge 8  - Mass Scaling   Objective Study the effects of DT2MS and TSSFAC parameters on the computational time to perform a explicit simulation Compare the computational time of the same simulation using a implicit solution scheme Background   In the context of Finite Element Analysis (FEA) and explicit…

Pedestrian Head Impact Simulation Objective   Perform a pedestrian head impact simulation in the following three cases:   Simple head model impacting a rigid wall Detailed head model impacting a rigid wall Detailed head model impacting an aluminum car bonnet    At each case, maximum stresses, accelerations…

Objective   Simulate a tensile test of a 10x10x10 mm cube component that behaves as a Hyper-elastic material   Compare the results against the material  model Use different element formulations (-2,-1,1,2) and compare results     Procedure   The first step is to model the test component, which…

Challenge 5 - Modeling Spot Welds     Objective: Perform an Impact simulation of two sheet metal components joined by Spot Welds: Model the spot welds as beam elements Model the spot welds as solid Hexa elements     Procedure   Case I)   Spot weld generation using CBEAM Elements   The…

Crash Box Simulation   Objective   Perform a crash box simulation and study the effects of part thickness in:   Resultant forces/accelerations Directional stresses Maximum strain   Procedure   The first step is to import the model to LS-PrePost, which can be done using the "import Ls-Dyna keyword…

Challenge 3 - Cellphone Drop Test Objective  Perform a complete simulation of a cellphone drop test, which will require to: Create a material card with aluminum properties Create a rigid wall to mimic ground Assign proper boundary conditions Define contacts between the cellphone and ground Define proper outputs in…

  Objective Solve the following equation by using both implicit and explicit solution methods `F(u)=u^3+9u^2+4u` Theoretical Background   Explicit and Implicit methods are numerical approaches used to solve differential equations. Yet, they differ in the sense that explicit methods use the known information at…

Objective     Obtain the different conversion factors between the following systems of units: Unit systems: gm mm ms Kg cm ms Kg cm s kg m s g cm s g cm us g mm s ton mm s slug ft s kg mm s g cm ms kg mm ms   Use those conversion factors in the following quantities     Procedure   From SI…

Project-2-Meshing of Door Inner Panel Challenge Objective: Mesh the following geometry under the given quality criteria Any 2D meshing process starts by deleting the solids and performing a geometry cleanup of the component. In particular, there are many missing surfaces in the upper part of the model. Thus, to save time,…

Project 1-Meshing of Rear Wheel Holder   Objective: Mesh the given component under the following quality criteria First, we must begin our 2D meshing process by deleting the solids and performing geometry cleanup/topology repair to increase our chances of obtaining an excellent mid surface As we can see from the previous…

Week 9 Challenge - 1D Connectors Objectives:  A. Learn the different 1D connector options   B. Mesh the given assembly with proper connectivity and Mesh Quality   Mesh the given geometries under the next Quality criteria: Since we already have the midsurface of the components, we will simply proceed to use…

Week 8 Challenge - 3D Tetra Mesh    Objectives:   A. Learn the different Tetra Meshing Techniques  B. Learn the Quality Criterias for 3D Tetra Meshing    1. Mesh the given component under the next Quality Criteria: The housing geometry consist of two components, even though they are treated as one body  by Hypermesh, we…

Week 4 Challenge Objectives: Familiarize with all the different 1D elements available in Hypermesh  Learn the difference between Rod,Beam and Bar elements, and learn how to assign them different cross sections  A. Create 1D elements on the following component with given cross-section and DOF   a. Rod element:- with only…