Why is P/A equal to 83kPA at an eccentricity ratio of 1?

In summary, at eccentricity ratio = 1, P/A is 83kPA. The vertical line is drawn at a given kl/r of 104 to find P/A, as stated in the first image. The person asking the question is struggling to understand why this is the case and is advised to focus on the basics instead of trying to rush through engineering concepts.
  • #1
chetzread
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Homework Statement


in this question , ( in second photo) i don't understand that why at eccentricity ratio = 1 , P/ A is 83kPA , why the vertical line is drawn at a point between 100 and 150 KL/r to find P/A ?

Homework Equations

The Attempt at a Solution


Is it wrong ? Or I left out something? [/B]
 

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  • #2
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  • #3
The vertical line is drawn at the given kl/r of 104.
You are trying to cram 4 years of engineering into 4 weeks. It won't work. Focus on the basics please.
 
  • #4
H
PhanthomJay said:
The vertical line is drawn at the given kl/r of 104.
You are trying to cram 4 years of engineering into 4 weeks. It won't work. Focus on the basics please.
How do we know that kl /r =104??
 
  • #5
Given in first image
 
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Related to Why is P/A equal to 83kPA at an eccentricity ratio of 1?

1. What is Euler's formula in beam?

Euler's formula in beam is a mathematical equation that describes the relationship between the bending moment, shear force, and the elastic properties of a beam. It is named after Swiss mathematician Leonhard Euler.

2. How is Euler's formula used in structural engineering?

Euler's formula is used in structural engineering to determine the load-carrying capacity of a beam and to design safe and efficient structures. It helps engineers calculate the maximum stress and deflection of a beam under different loading conditions.

3. What are the assumptions made in Euler's formula?

The assumptions made in Euler's formula include: the beam is made of a homogeneous, isotropic material, it is initially straight and has a constant cross-section, and the deflections are small compared to the length of the beam.

4. Can Euler's formula be used for all types of beams?

No, Euler's formula is only applicable to beams with a constant cross-section and supported at both ends. For other types of beams, more complex equations and methods are used.

5. How accurate is Euler's formula in predicting the behavior of real beams?

Euler's formula provides a good estimate of the beam's behavior for small deflections, but it becomes less accurate for larger deflections. This is because the formula does not take into account factors such as material nonlinearity and geometric imperfections that can affect a beam's behavior in real-life scenarios.

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