Simulate the thermo-mechanical regime for a brake mechanism

• Project ID:

  704155

• Project Type:

  Fixed

• Budget:

  $30-$250 USD
  

Project Description:

A 3D model of the disc and pads were made in the DiskBrake file (I only made the components forms). The disk is pressed from lateral sides by the brake pads. The brake pads are formed of two components tied each other – the pad (who enters in contact with the disc) and the back plate (which is pressed from outside with a pressure of 1(one) MPa.)

The brake process starts when the brake pads enter in contact with the disk (so they are pressed on the disc surface with the pressure mentioned earlier), so the frictional forces cause deceleration and heat.

The initial angular velocity of the disc is 92 rad/s and at the end of the process is 0 rad/s (see Table3). Total time for the friction process is about 4.72 seconds.
The disc is rotated so that the heat is generated by friction.
The problem is to obtain a thermal regime for two possibilities:
1st the brake process with no air flow;
2nd one by taking in count the air flow (the speed at the beginning of the process is 100 km/h (see table3)).



Table1. Material proprieties:
Disc Brake Pad Backplate
Density (kg/m3) 7050 2620 7887
Young’s Modulus (GPa) 116 1.25 210
Poisson’s Ratio 0.27 0.29 0.3
Conductivity (W/m.oC) 533 2 32
Specific Heat (J/kg/oC) 103 1100 595


Table2. Friction coefficient variation:
Temperature of property measurement (°C) 100 200 300 400
Friction coefficient, 0.38 0.41 0.42 0.24



Table3. Angular velocity variation in time and with the car speed (total time for contact between plates and disc is 4.72 seconds)
V [km/h] tf [s] ω [rad/s]
100,00 0,00 92,28498
95,00 0,24 87,67073
90,00 0,47 83,05648
85,00 0,71 78,44223
80,00 0,94 73,82798
75,00 1,18 69,21373
70,00 1,42 64,59948
65,00 1,65 59,98523
60,00 1,89 55,37099
55,00 2,12 50,75674
50,00 2,36 46,14249
45,00 2,60 41,52824
40,00 2,83 36,91399
35,00 3,07 32,29974
30,00 3,30 27,68549
25,00 3,54 23,07124
20,00 3,78 18,457
15,00 4,01 13,84275
10,00 4,25 9,228498
5,00 4,48 4,614249
0,00 4,72 0


The initial temperature of both models is 20°C.

Additional Project Description:

06/24/2010 at 11:14 EDT:
Hi,

I've edited a bit the project, please read on if you are still interested on working on it:

there are 6 types of disc brakes in the files attached to this mail. They were made in ACAD2008 (disc_brake.dwg or .dxf). One is with .dwg extension and the other one is with .dxf extension specially to be imported in ABAQUS as a sketch.

I need you to do a simulation of a thermo-mechanical regime for a brake mechanism.

The thing is that in ABAQUS’ manual you can find .inp files with examples of this kind of simulation but not taking count the air flow.

I’ve also attached an archive with articles with examples of this kind of simulation. (Articles with brake process.rar)

Please, see also the "Problem description.docx" file for more details.

Tkanks in advance!

Skills required:

CAD/CAM, Engineering, Machine Learning, Mechanical Engineering

Additional Files:

Prob+desc+and+Abaqus+files.rar Problem+desc+%2B+DWG+%2B+DXF+files.rar Fully+Coupled+Thermal-Mechanical+Analysis.doc NUMERICAL+AND+EXPERIMENTAL+ANALYSIS+OF+A+PEGS-WING.rar Thermal+Performance+Analysis+and+Geometrical.part1.rar Thermal+Performance+Analysis+and+Geometrical.part2.rar