Challenge

Week 5 Sphere pressing on a plate

PPrasanna Srinivasan29 Nov 2020

Sphere bending Plate Report

Aim: For this challenge, perform the analysis to simulate a sphere pressing on a plate.

Use Structural steel for both sphere and plate but the material of the plate must be Non-Linear.

Press the sphere onto plate 4mm downwards and retract it. The plastic deformation must be captured by you. Attach appropriate images and make a detailed report.

Procedure:

Select Static Structural, drag and drop into Project Schematic.
Choose material of as Structural Steel NL, under Engineering Data.
Under geometry tab, import the given sphere bending plate geometry, double-click to open Space Claim to register the model.
Then in Mechanical Module, assign Structural Steel NL to the plate. The sphere can remain at structural steel.
Assign a frictional connection between the sphere and plate with coefficient of friction = 0.74. (value taken from https://roymech.org/Useful_Tables/Tribology/co_of_frict.html)
Assign Symmetry to 2 faces with X-axis and Z-axis respectively.
The mesh size was set to default, and the sphere and plate were given 0.8mm and 0.75mm mesh sizing, respectively.
Under static structural tab, we set the analysis to 4 steps with auto timestep as programmed.
A displacement of -4mm in 2 steps is given along Y axis for the sphere, and the other 2 steps are to lift the sphere back to the initial position to prove the plate has been non-linearly deformed.
Directional Deformation in Z-axis, Equivalent Plastic Strain and Equivalent Stress plots are requested from the solver as outputs.
Equivalent Stress to prove the plate has been deform non-linearly.
Run the simulation by clicking on “solve”.