Drop Test

   
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Impact Drop Test:
Drop a 20% glass filled polymer part onto a hard surface from 1.5 meters and study impact stresses. Also, apply a 9.5 N load and study deflection.

Special features:
3D model set up with gravity, impact planes, and prescribed displacement with quadratic mid-side element nodes turned on for high accuracy results.

Output:
Displacements, stresses.

Comments:
This plastic part was subject to shock loading. Clicking on the 1st thumbnail above will produce a CAD drawing. The 2nd will show an animation of the entire drop from 1.5 meters high. The client specifically requested that the orientation of the part be at 45 degrees to the horizontal so that it struck a hard surface on the corner. The 3rd thumbnail shows a movie of the drop right before, during, and after contact. Actually, to reduce computation time, the velocity when the part was just 0.2 inches above the contact surface was calculated and input into Autodesk Simulation as an initial velocity at 0.2 inches. Notice the high frequency vibration experienced within the part denoted by the quickly changing stress color bands. If the time steps were further reduced, one could see the sound waves passing through the part (cool!). The 4th thumbnail shows some mesh detail and the location of the 9.5 N force load. The 5th thumbnail shows the deflected shape when loaded with the 9.5 N force using the highly accurate mid-side node option turned ON.