Radial/Hoop stress in a steel turbine disc

In summary, the conversation discusses the boundary conditions and assumptions needed to solve a problem related to radial stress. The speaker is confused about the lack of information regarding the width and material properties, which will impact the final solution. They request clarification on the given equations and values to accurately solve the problem.
  • #1
mattyboson12
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Homework Statement


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Homework Equations


-given in question

The Attempt at a Solution


I am bit confused with the boundary conditions of this problem. I understand the radial stress is zero on the inside diameter and the radial stress on the outside diameter will be the reaction to the centripetal force per m^2. So surely you need a width to calculate the radial stress on the outside diameter which isn't given in the question?
 
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  • #2
Also, are we assuming the material is isotropic and homogenous? These factors will affect the final solution and should be clarified in the problem statement. Additionally, can you provide the values for the given equations or specify if they are constants or variables? This information will help me accurately solve the problem.
 

FAQ: Radial/Hoop stress in a steel turbine disc

1. What is radial/hoop stress in a steel turbine disc?

Radial/hoop stress refers to the stress that is exerted on the outer edge of a steel turbine disc due to the centrifugal force generated by the spinning motion of the disc.

2. Why is radial/hoop stress important in a steel turbine disc?

Radial/hoop stress is important because it can cause the disc to deform or fail if it exceeds the strength of the material. This can lead to catastrophic failures and downtime in the turbine system.

3. How is radial/hoop stress calculated in a steel turbine disc?

Radial/hoop stress can be calculated using the formula σ = ρω², where σ is the stress, ρ is the density of the material, and ω is the angular velocity of the disc.

4. What factors can affect radial/hoop stress in a steel turbine disc?

The factors that can affect radial/hoop stress in a steel turbine disc include the speed of rotation, the thickness and diameter of the disc, the material properties, and the temperature of the disc.

5. How can radial/hoop stress in a steel turbine disc be managed?

Radial/hoop stress can be managed by selecting the appropriate material with high strength and fatigue resistance, designing the disc with proper thickness and diameter, and ensuring proper maintenance and inspection of the disc to detect any potential failures before they occur.

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