{"id":363458,"date":"2024-04-22T09:41:31","date_gmt":"2024-04-22T09:41:31","guid":{"rendered":"\/forum\/forums\/topic\/rolling-workpiece-after-rolling-doesnt-match-the-rollers-gap\/"},"modified":"2024-06-04T12:37:31","modified_gmt":"2024-06-04T12:37:31","slug":"rolling-workpiece-after-rolling-doesnt-match-the-rollers-gap","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rolling-workpiece-after-rolling-doesnt-match-the-rollers-gap\/","title":{"rendered":"(Rolling) Sheet thickness after rolling doesn’t match the roller’s gap"},"content":{"rendered":"

Hi I simulate the rolling operation in static structural with 2 work roll, 2 back roll and a sheet.
Here is the size of each geometry.<\/p>\n

Work roll
diameter: 100mm, length: 160mm, material: 440B
Back roll
diameter: 150mm, length: 160mm, material: D2
Sheet
width: 150mm, length: 100mm, thickness: 3.8mm rolls to 3mm, material: 316<\/p>\n

Friction coefficient is 0.42, turn on large deflection, turn off autosubstep and set 500 substeps.
Use normal lagrange to minimize the mesh penetration and contact tool also shows no penetration.
Roller rotate 100 degree and sheet goes through roller with friction. (Didn’t give sheet any displacement to help go through roller)
In sheet’s symmetry plane I set the frictionless support.<\/p>\n

The problem is sheet after rolling, the thickness deformation only shows -0.26 ~ -0.28mm in average.
I’m using symmetry so half the y deformation from upper sheet face should be -0.4mm (Roller’s gap is 3mm and ignore material rebound since it’s consider very small<\/span>).
I also notice roller will shaking while rolling.<\/p>\n

Material (All of them have plastic curve)
<\/a><\/a><\/a>
Contact setting (Frictional, Normal lagrange, Friction coefficient is 0.42, add offset; no ramping)
<\/a><\/a>
Mesh (Mesh metric shows average high quality)
<\/a>
<\/a>
Joint (Revolute body to ground, Both back roll and work roll have this, and I set deformable instead of rigid)
<\/a>
Solution setting (500 substeps, turn on large deflection)
<\/a><\/p>\n

Result (Y Directional deformation should be very close to -0.4mm but only shows -0.26 ~ -0.28mm in average)
<\/a>
Roller shaking while rolling
\"\"<\/a>
If anyone have solution I will be super grateful.<\/p>\n","protected":false},"template":"","class_list":["post-363458","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t