10-42. Determine the moment of inertia of the beam's cross- sectional area about the x axis. 30 mm

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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### Moment of Inertia Calculation

**Problem 10-42:**

**Objective:**  
Determine the moment of inertia of the beam's cross-sectional area about the x-axis.

**Diagram Explanation:**  
The diagram illustrates the cross-section of a beam resembling a channel shape. The beam sections are dimensioned as follows:

- Top flange: 30 mm height
- Web height: 140 mm
- Bottom flange: 30 mm height
- Web width: 70 mm
- Overall width including flanges: 170 mm
- Each flange (top and bottom) extends 30 mm beyond the web.

**Coordinate System:**

- The origin is positioned at the centroid (C) of the cross-section.
- x-x' axis runs horizontally through the centroid (C).
- y-y' axis runs vertically through the centroid (C).

To solve for the moment of inertia about the x-axis, decompose the cross-section into simpler geometric shapes and calculate their individual moments of inertia, applying the parallel axis theorem if necessary. Add these to obtain the total moment of inertia about the x-axis.
Transcribed Image Text:### Moment of Inertia Calculation **Problem 10-42:** **Objective:** Determine the moment of inertia of the beam's cross-sectional area about the x-axis. **Diagram Explanation:** The diagram illustrates the cross-section of a beam resembling a channel shape. The beam sections are dimensioned as follows: - Top flange: 30 mm height - Web height: 140 mm - Bottom flange: 30 mm height - Web width: 70 mm - Overall width including flanges: 170 mm - Each flange (top and bottom) extends 30 mm beyond the web. **Coordinate System:** - The origin is positioned at the centroid (C) of the cross-section. - x-x' axis runs horizontally through the centroid (C). - y-y' axis runs vertically through the centroid (C). To solve for the moment of inertia about the x-axis, decompose the cross-section into simpler geometric shapes and calculate their individual moments of inertia, applying the parallel axis theorem if necessary. Add these to obtain the total moment of inertia about the x-axis.
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