# Find Final Diameter of 30m Aluminum Bar (172MPa)

• MHB
• Joe_1234
In summary, a 30 m long aluminum bar with a diameter of 50 mm is under a tensile stress of 172 MPa. With a Young's modulus of 69116 MPa and a Poisson's ratio of 0.4, the final diameter of the aluminum bar can be determined.
Joe_1234
A 30 m long aluminum bar having a diameter of 50 mm is subjected to a tensile stress of 172 MPa. Find the final diameter of the aluminum bar if E=69116MPa and Poisson's ratio=0.4?

Hi Joe_1234,

I saw you posted your question in the "Problem of the Week" forum, but I am sorry, that forum is meant ONLY for directors to post a problem on weekly basic. Do you mean to provide a challenge problem for our members to attempt at a solution, or do you mean to ask for help there?

As a temporary measure, I have moved your thread to other forum, assuming you wanted to get some help to answer the problem. :)

## 1. How do you calculate the final diameter of a 30m aluminum bar?

The final diameter of a 30m aluminum bar can be calculated using the formula D = (4F/πσ)^0.5, where D is the final diameter, F is the force applied, σ is the yield strength of aluminum (172MPa in this case), and π is the mathematical constant pi.

## 2. What is the yield strength of aluminum?

The yield strength of aluminum refers to the amount of stress that can be applied to the material before it begins to deform or break. In this case, the yield strength of aluminum is 172MPa.

## 3. What is the significance of finding the final diameter of a 30m aluminum bar?

Finding the final diameter of a 30m aluminum bar is important for understanding the structural integrity and strength of the bar. It can also help determine if the bar is suitable for a specific application or if it needs to be reinforced.

## 4. Can the final diameter of the aluminum bar be calculated using a different formula?

Yes, there are other formulas that can be used to calculate the final diameter of an aluminum bar, such as the Euler-Bernoulli beam equation or the Timoshenko beam equation. However, the formula mentioned in question 1 is commonly used for simple calculations.

## 5. What other factors should be considered when calculating the final diameter of a 30m aluminum bar?

Other factors that should be considered when calculating the final diameter of a 30m aluminum bar include the type and quality of the aluminum, the temperature and environment in which the bar will be used, and any external forces or stresses that may be applied to the bar.

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