Heat produced from Brake Pad Friction material?

In summary, the conversation revolved around a model of a car brake system and how to find the heat generated from the equation for force transmitted to the disc. Suggestions were provided, including using the car's velocity and mass, as well as the force and distance over which it is applied, to calculate the heat generated. Another method mentioned was using the equation for work, W=FS, or the equation for energy, E=mv^2/2. The conversation also acknowledged that the mass and energy may not be constant due to factors such as air drag. The original poster expressed gratitude for the replies and stated that they will continue to study the information provided.
  • #1
heiroglif
18
0
Hi all,

My model of a car brake system is intended to monitor the rate at which heat increases/decreases as friction between a brake pad and disc increases.

My equation for the force transmitted to the disc is:

Force = (δP x Ac) x μb

where δP is the pressure generated at the master cylinders

Ac is the area of the caliper pistons

and μb is the coefficient of friction of the brake pad material.

how can i find the heat generated fromt his equation, any suggestions?

thanks in advance
 
Engineering news on Phys.org
  • #2
I am no expert but the brakes convert kinetic energy into heat. So if you know the car's velocity and mass, you can figure out how much kinetic energy will be converted to heat.

Also, if you know how much force the brake is applying and the distance over which it is applied, you can figure out how much energy was converted to heat.
 
  • #3
Now that you know the force F. Just imagine the car is in its stop and you still push the brake: no heat. The work is calculated as : W=FS , then dW=FdS <==> dW/dt=FdS/dt (S is the distance, v: velocity) or power P=Fv. All the work is converted into heat so with that equation, you calculate exactly the heat generated by the brake.
You can also easily compute the heat by : E=mv^2/2. But the mass in this equation is not fix, and the energy E also includes the friction caused by air drag.
 
  • #4
Guys thanks a lot for your replies, its much appreciated, i will study what you have said, and if i have any more issues, will post them here...thanks :)
 

1. What is the main source of heat produced from brake pad friction material?

The main source of heat produced from brake pad friction material is the conversion of kinetic energy into thermal energy during the process of braking. When the brake pads press against the spinning rotor, friction is created, which generates heat.

2. How does the composition of brake pad friction material affect the amount of heat produced?

The composition of brake pad friction material plays a significant role in determining the amount of heat produced. Generally, softer and more abrasive materials, such as organic and semi-metallic compounds, produce more heat compared to harder and less abrasive materials, such as ceramic compounds.

3. Can excessive heat from brake pad friction material cause damage to the braking system?

Yes, excessive heat from brake pad friction material can cause damage to the braking system. High temperatures can lead to brake fade, where the brake pads lose their effectiveness and the braking distance increases. It can also cause glazing, where the brake pads become smooth and lose their grip on the rotor.

4. How can the heat produced from brake pad friction material be managed?

The heat produced from brake pad friction material can be managed by using heat-resistant materials, such as ceramic compounds, which can withstand higher temperatures without losing their effectiveness. Additionally, proper brake maintenance, such as regular inspection and replacement of worn-out brake pads, can help manage heat and prevent damage to the braking system.

5. Is there a correlation between the amount of heat produced from brake pad friction material and the stopping power of the brakes?

Yes, there is a correlation between the amount of heat produced from brake pad friction material and the stopping power of the brakes. Higher temperatures can improve the friction between the brake pads and the rotor, resulting in better stopping power. However, excessive heat can also lead to brake fade and reduce the stopping power. Therefore, it is essential to find the right balance between heat production and heat dissipation for optimal braking performance.

Similar threads

  • Engineering and Comp Sci Homework Help
6
Replies
188
Views
6K
  • Thermodynamics
3
Replies
73
Views
3K
Replies
10
Views
2K
  • Mechanical Engineering
Replies
14
Views
1K
  • Mechanical Engineering
Replies
15
Views
5K
Replies
2
Views
5K
  • Introductory Physics Homework Help
Replies
4
Views
1K
Replies
22
Views
1K
  • Mechanical Engineering
Replies
2
Views
1K
  • Introductory Physics Homework Help
Replies
1
Views
9K
Back
Top