A custom-fabricated component for a machine consists of a steel (y = 0.28 lbf/in?), 5-in diameter rod and a thin-walled bronze (y = 0.3 lbf/in³) bushing that are both 3.6 in long. For clarity, the central piece with the hole pattern is made of steel and that steel piece is surrounded by the bronze bushing. Determine the mass moment of inertia of the component about an axis parallel to its length and passing through point O (located at the outer surface of the bushing). All dimensions are in inches.

International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter9: Moments And Products Of Inertia Of Areas
Section: Chapter Questions
Problem 9.61P: Using Ix and Iu from Table 9.2, determine the moment of inertia of the circular sector about the...
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A custom-fabricated component for a machine consists of a steel (y = 0.28 lbf/in?), 5-in diameter rod and a thin-walled bronze (y =
0.3 lbf/in³) bushing that are both 3.6 in long. For clarity, the central piece with the hole pattern is made of steel and that steel piece
is surrounded by the bronze bushing. Determine the mass moment of inertia of the component about an axis parallel to its length
and passing through point O (located at the outer surface of the bushing). All dimensions are in inches.
Transcribed Image Text:A custom-fabricated component for a machine consists of a steel (y = 0.28 lbf/in?), 5-in diameter rod and a thin-walled bronze (y = 0.3 lbf/in³) bushing that are both 3.6 in long. For clarity, the central piece with the hole pattern is made of steel and that steel piece is surrounded by the bronze bushing. Determine the mass moment of inertia of the component about an axis parallel to its length and passing through point O (located at the outer surface of the bushing). All dimensions are in inches.
Expert Solution
Step 1

The mass of the solid steel cylinder without any hole pattern is

Mechanical Engineering homework question answer, step 1, image 1

The mass of the bronze part is

Mechanical Engineering homework question answer, step 1, image 2

The mass of the hole pattern is

Mechanical Engineering homework question answer, step 1, image 3

Step 2

The mass moment of inertia of the solid steel part can be determined as shown below.

Mechanical Engineering homework question answer, step 2, image 1

The mean radius of the bronze part is

Mechanical Engineering homework question answer, step 2, image 2

The moment of inertia of the bronze part can be determined as,

Mechanical Engineering homework question answer, step 2, image 3

The moment of inertia of the hole pattern about the centroidal axis is

Mechanical Engineering homework question answer, step 2, image 4

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