Week - 3 Drop test Challenge

TITLE: CELL PHONE DROP CHALLENGE

OBJECTIVE: To perform a cell phone drop simulation from scratch model using LSDYNA keywords.

• At first mesh model is loaded in prepost using .k extension file.
• Then measurement is done using measure option in element tool.

• From this measurement I can know the unit system that I have to use is mm,ms,kg,GPa.
• Now I look for the parts in the model.

• Now I have renamed the default parts in phone and plate.
• Now I have to assign matrerials and section to the parts.
• For plate I use Shell Section as ELFORM2 and for phone I use solid section with ELFORM1.
• ELFORM is element formulation.
• Now I have to select the materials.

• Here the phone material is given as Aluminium Alloy.
• Here RO is Mass Density, E is Youngs modulus and PR is poissions ratio of the material.

• The plate material is given as the steel.All the data is given in the above image.
• Now after the definig the section and the materials.I have to define the boundary conditions.

• Now in create boundary option i have to create a new spc to contrain the rigid plate in all translational and rotational x y and z directions.

• Now I setup a initail velocity by using create inital option and give a velocity of -4mm/s in z direction.
• Now defining contact is must in this simulation.

• Here I use surface to surface contact and SSTYP as 3 so that I can select the part as SSID.I gave slave as phone and master as rigid wall.
• Now I use control diffrent control cards.

• Here control termination is nessary cards all other cards are used to control parametrs like accuracy,hourglass and energy.
• The termination time used here is 6ms.

• The Databse card is used to create the output parametrs and graphs.

• Here I use ASCII,D3PLOT and D3THDT.
• ASCII - GLSTAT,MATSUM,RCFORC,SLEOUT and SPCFORC is used.

RESULTS: The plots that are obtained form the simulation.

• Effective stress in the phone.

CONCUSION

• As It was a test simulation to create input deck in LSDYNA therefore results are neglected.
• From scratch model a simulation hasbeen setup and run successfully in LSDYNA Manager.
• The graphs as well as countour was also seen in postLS.