Determine Wall Thickness for 1,000 in. Aluminum Tube to Support 10-kip Load

In summary, the required wall thickness for a 1,000 in. aluminum tube to support a 10-kip load can be calculated using the formula: t = (P * D) / (2 * S * F). The allowable stress for aluminum is typically around 35,000 psi. The safety factor is included in the calculation to provide a margin of safety for unexpected or fluctuating loads. The wall thickness calculation for a 1,000 in. aluminum tube will vary from other materials due to their different properties. This calculation can be used for other types of loads, but it is always important to consult with a professional engineer for accurate and safe design calculations.
  • #1
thall88
1
0
An aluminum tube with an outside diameter of 1,000 in. will be used to support a 10-kip load. If the axial stress in the member must be limited to 30 ksi T or C, determine the wall thickness required for the tube. I used tau=shearing stress/area therefore 30(pie times 1-d)=10 but that is not correct Thanks
 
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  • #2
https://www.physicsforums.com/showthread.php?t=94379
 
  • #3
I believe the question refers to normal stress [itex] \sigma [/itex]
 
  • #4
Also remember that stress divided by area is not what you want. You want LOAD divided by area to get stress.
 

1. How do you calculate the required wall thickness for a 1,000 in. aluminum tube to support a 10-kip load?

The required wall thickness can be calculated using the formula: t = (P * D) / (2 * S * F), where t is the wall thickness, P is the load, D is the tube diameter, S is the allowable stress of the aluminum material, and F is the safety factor. In this case, P = 10 kips, D = 1,000 in., S = allowable stress of aluminum, and F = safety factor.

2. What is the allowable stress for aluminum in this calculation?

The allowable stress for aluminum can vary depending on the grade and type of aluminum. However, for general purposes, the allowable stress for aluminum is typically around 35,000 psi.

3. Why is the safety factor included in the calculation?

The safety factor is included to ensure that the tube can withstand unexpected or fluctuating loads without failure. It provides a margin of safety to account for uncertainties in the materials or loading conditions.

4. Is the wall thickness calculation for a 1,000 in. aluminum tube different from other materials?

Yes, the wall thickness calculation will vary for different materials due to their different properties and strengths. The formula used for aluminum may not be applicable for other materials.

5. Can this calculation be used for other types of loads?

Yes, this calculation can be used for other types of loads as long as the appropriate load and stress values are used. However, it is always important to consult with a professional engineer for accurate and safe design calculations.

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