Crash Box Simulation in LSDYNA

Aim: Using the manual (*CONSTRAINED_JOINT keyword) demonstrate spherical, revolute, cylindrical, and translational joints between two rigid bodies. Procedure: 1. Revolute joint:  As we can see in the theory, initially, we created two 4N shell elements using shape mesher, in my case both were of equal dimensions (not…

Aim: To simulate the scenario of Bird Strike in Aero-Engine, by using proper flow of the keyword file and calling all the relevant files to the main.k file. Procedure: 1. The bird strike file was loaded into the ls prepost. 2. Each parts were seperated in seperate.k files. 3. A main.k file is defined where all the…

Objective: Using the given material data, calculate the Mooney Rivlin and Ogden material constants and compare the both using stress-strain data from a Dogbone specimen tensile test with 100 percent strain. And analyze the comparison. Brief Theory-  Hyperelastic materials are the type of materials that has the…

Aim: Use the diagram of the true stress-strain curve of graphite iron casting, pick any one of them and use the data to create either a MAT_024 or MAT_018 material model, and then validate it.    Work flow:  Extract the data from the plot  Clean the data and visually confirm that it matches the…

Aim:, To model spotwelds  with both beam and solid elements and compare the results for the given assembly of parts and run a crash test Procedure:Mesh was provided. First step was to provide material of the craashbox and also define section for the shell The given model was imported and in between the 2 sections…

Aim- Calculate the stretch ratio by comparing the ELFORM (-2,-1,1,2) with Ogden_Material Model Objective-   Create a block of 10mmx10mmx10mm dimension with 10 elements for each direction and use the material card attached (Ogden_Material.k) Use appropriate boundary conditions to simulate tensile behavior…

Aim- To understand and evaluate the mass scaling procedure to perform the explicit analysis and use trial and error method to optimize TSSFAC and DT2MS and reduce the run time and also maintain the stability Objective- To achieve the hard limit on mass scaling of 8% and stability should be completely intact. …

Objective- In this project, a children's headform model impacts with a rigid wall and also with a car Hood bonnet. the Stress / Strain plots and acceleration plot for both the simulation should be compared. From the simulation, the head impact coefficient must be calculated manually and with the help of LS-PrePost.…

Objective- simulate a crash test for a crash box for which mesh is given. Create a Rigid wall , Give velocity to the box and plot results and compare the simulation of 1.2mm and 1.5mm. Methodology- Mesh was provided. First step was to provide material of the craashbox (Mat24 was used, with the properties of steel) and…

Objective-To create a basic solver deck to Simulate a drop Test.  Given , .K file consisiting of nodes and elements of two parts, a simplified cellphone and a plate mimicking ground. I need to create a complete simulation file from this to perform a drop test. Steps- 1. Load the .k files in Ls Prepost. 2. Now we see…

SI Unit to gm/mm/ms Mass: 1kg = 1000g Length:1m= 1000mm Time:1sec= 1000ms Force: 1N= 1kg(m/s2 )= 1000gm * (1000mm/10^6ms)= 1 gm(mm/ms^2) (Conversion Factor 1) Stress: 1Pa= 1N/m^2 =1kg(m/s2  m2)=1000 *(1000/10^6 *10^6)gm(mm/mm^2 ms^2) =10^-6 gm/mm ms^2 (Conversion Factor 10^-6)   Energy: 1Nm= 1 kgm2 /s2 …