Challenge

Week - 4 - Crash Box Simulation

BBasini Bibek Rao11 Mar 2022

Aim:-

The aim of this challenge is to analyse the crash of a crush box with a rigid wall, the model is given below.

Procedure:-

The first step of this challenge is to open the model in the LS-Prepost.
The next step is to create a section card for the shell element and consider element formulation as 2. We have to create two models with thicknesses of 1.2 and 1.5 mm.
The next step is to create a material card for steel with piecewise elastic-plastic material.
The next step is to assign section Id and material Id to the part card.
To check the crash of the crush box we have to make a rigid wall using entity creation.
The next step is to create a box containing the entire crush box using entity creation.
Then the next step is to create an initial velocity card and assign the velocity of the box as `13.89 (mm)/(ms) ={50 kmph}`
Then the next step is to create a contact card of auto single surface to model the deformation of the crush box.
Then the next step is to create the control termination card with a termination time of 2.5ms.
Post Processing:-
1. The cross-sectional force generated in the nodes of the crash box (along its length)
  - for thickness 1.2mm
  - for thickness 1.5mm
2. Acceleration plot of a node in the middle of the cashbox (along its length)
  - for thickness 1.2mm
  - for thickness 1.5mm
3. Maximum directional stress and strain along the length of the cashbox (X strain, Y strain etc)
  - x-stress at adjacent to beam elements
    - for thickness 1.2mm
    - for thickness 1.5mm
4. The plot of all energies (total, internal, kinetic, hourglass, sliding)
  - for thickness 1.2mm
  - for thickness 1.5mm