  A strain gage located at C on the surface of bone AB indicates that the average normal stress in the bone is 3.80 MPa when the bone is subjected to two 1220-N forces P as shown. Assuming the cross section of the bone at C to be annular and knowing that its outer diameter is 25 mm, determine the inner diameter of the bone’s cross section at C.

Question

A strain gage located at C on the surface of bone AB indicates that the average normal stress in the bone is 3.80 MPa when the bone is subjected to two 1220-N forces P as shown. Assuming the cross section of the bone at C to be annular and knowing that its outer diameter is 25 mm, determine the inner diameter of the bone’s cross section at C.

Step 1

First of all we will write the equation of the stress as shown below:

Here, F represents force

A represents area

sigma represents stress.

Step 2

Now, let us put the value of force and stress in the formula and find area as shown below:

Step 3

Now area of ring is given by the formula as shown below:

Here, R repres...

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Civil Engineering 