Week - 4 - Crash Box Simulation

AIM: To create a complete simulation file for Crash box with required keyword

Procedure:

• Open the keyword file and look for the available keywords
  
• Create a SHELL section of 1.2mm and 1.5mm for both cases
• Go to keyword manager> Section> SHELL
  
• Create a linear plasticity Material go to keyword manager>MAT>
  
• Create Part and assign the section ID and Material ID whhich is created in previous step
  
• Create rigidwall by going to Create entity> Rigid wall
  
• Create Initial Velocity card for the crash box in positive X direction with 13.88mm/ms
  
• establish a self contact for crash box
  
• go to keyword manager > Control>Energy, this option is enabled for calculating Hourglass, sliding energies
  
• Go to Keyword manager >Control>Termination
  this is to specify the run time of simulation , in this case we will be using 2ms
  
• Create Database card for ASCII, Binary, this option will enable the request for getting output for Energy plots, section force, acceleration
• After creating all the required cards run the simulation
• From the above image we can see there is no problem in running the simulation , we got normal termination

Output:

• Von mises stress for 1.2mm
  
• Von mises stress for 1.5mm thickness
  
• Energy Plots for 1.2mm thickness
  
• Energy Plots for 1.5mm thickness
  
• Hourglass enegry 1.2mm
  
• Hourglass enegry for 1.5mm
  
• Acceleration at middle of crash box for 1.2mm thickness
  
• Acceleration at middle of crash box for 1.5mm thickness
  
• Acceleration experienced by bith the model is same at the exact node
• We can see the von mises stress is more in the thicker model
• Hourglass energy are same in the both cases