Week - 4 - Crash Box Simulation

aim- crash analysis of a box havng two different thickness 1.2 and 1.5 and study the changes in the energy or forces thru graphs

procedure- open the keyword file provided in the question in ls dyna software

and see the keyword manager

now we need to create section properties

KEYWORD MANAGER> SECTION> SHELL

Now we need to introduce material property in the model

KEYWORD> MAT> 024 PIECEWISE LINEAR PLASTICITY

NOW WE NEED TO INTRODUCE HOURGLASS ENERGY IN THE MODEL

KEYWORD MANAGER> HOURGLASS

NOW WE NEED TO ADD SECTION ID AND MATERIAL ID IN THE PART

KEYWORD MANAGER> PART

NOW WE WILL INTRODUCE INITIAL VELOCITY IN THIS MODEL WHICH IS 50 KMPH WHICH WHEN CONVERTED BECOMES 13.88MM/MS

CREATE ENTITY> INITIAL> VELOCITY> CRE

NOW LETS CREATE RIGID WALL

CREATE ENTITY> RIGIDWALL> CRE> PLANAR> 1n+NL

NOW INTRODUCE THE ENERGY CARD IN THE MODEL

KEYWORD MANAGER> CONTROL> ENERGY

NOW LETS INTRODUCE TERMINATION TIME IN THIS MODEL AND IN QUESTION THE HAVE SHOWN 2 MS AS THE TOTAL TIME

KEYWORD MANAGER> CONTROL> TERMINATION

NOW WE NEED TO ADD THE DATABASE WHICH WILL HELP US IN PLOTTING OF THE GRAPH

KEYWORD MANAGER> DATABASE> BINARY_D3PLOT

NOW ADD ASCII OPTION BLOCK TO ADD GLSTAT, MATSUM, NODOUT, RCFORC, RWFORC, SECFORC, AND SLEOUT.

KEYWORD MANAGER> DATABASE> ASCII OPTION

NOW LETS ADD EXTENT BINARY CARD TO THE MODEL

KEYWORD MANAGER> DATABASE> EXTENT_BINARY WITH STRFLG=1

KEYWORD MANAGER> DTABASE> HISTORY NODE

CREATE ENTITY> CROSS_SECTION> CRE

AFTER CHECKING THE MODEL AND RUNNING SIMULATION IN LS RUN

OPEN BINARY FILE NAMED AS D3PLOT

THEN SE THE VON MISES STRESS

EFFECTIVE PLASTIC STRAIN

SECTIONAL FORCE

RESULTANT ACCELERATION

RESULTANT VELOCITY