Week - 3 Drop test Challenge
AIM:
- Simulation of mobile phone dropping test
PROCEDURE:
- open LS-Dyna and input .k file given which include CAD model of phone and plate
- check what are the keywords available in keyword deck
- create node set for both cell phone and plate
Create entity>Set Data> SET NODE>create>select all nodes on the mobile model>click apply
Create entity>Set Data> SET NODE>create>select all nodes on the plate model>click apply
- create segment for declaring where to hit
Create entity>Set Data> SET_SEGM>create>select bottom surface on the mobile model>click apply
Create entity>Set Data> SET_SEGM>create>select top surface on the plate model>click apply
- apply boundary condition
Create entity>Boundary> SPC>create>input node set id of plate>check all DOF >click apply
- specify conact
keyword manager>conatct>automatic_surface_to_surface >input surface A as mobile phone segment and surface B as plate segment >Accept>Done
- control termination
keyword manager >control>termination>Input end time as 2>accept>Done
this is important control card to run a simulation.
- specify required output in database
keyword manager>database>binary_D3plot>input DT as 0.1
- initial velocity
keyword manger>initial>velocity>input NSIDas node set id of mobile>select direction of velocity>input magnitude of velocity>accept>Done
- material assigning:-
for mobile, select material as MAT24 piecewise_linear plasticity
keyword manager>MAT>024_piecewise_linear_plasticity>specify required properties>accept>done
for plate, selelct material as MAT rigid
keyword manager>MAT>020_rigid>specify properties>accept>Done
- create section solid
here both plate and mobile model is solid ,to create solid section
keyword manager>section>solid>specify element formulation and input section ID>Accept>Done
- create part
keyword manager >part>part>specify part ID>selelct section id >select mat id of phone>accept>add>specify part id > select section id>select MAT ID of plate>accept>Done
- save keyword file with extention.k and specify location
- run the same file in LS-Run ,after normal termination open file in D3_plot
CONCLUSION:-
- Performed a drop test simulation of a cell phone dropped on a plate under initial velocity using LS-Dyna.
- max vonmises stress is 0.279kg/mm^2.