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Moment of Inertia - Revision history
2026-05-29T23:30:19Z
Revision history for this page on the wiki
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DT Online: Corrected Category
2016-04-22T15:28:58Z
<p>Corrected Category</p>
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DT Online at 13:42, 2 June 2015
2015-06-02T13:42:11Z
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DT Online
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DT Online: Added category links
2015-04-28T15:44:59Z
<p>Added category links</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:44, 28 April 2015</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Alternatively, and for more varied cross sections, there exists an online [http://civilengineer.webinfolist.com/str/micalc.htm '''Calculator for Moments of Inertia for plane sections'''].</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Alternatively, and for more varied cross sections, there exists an online [http://civilengineer.webinfolist.com/str/micalc.htm '''Calculator for Moments of Inertia for plane sections'''].</div></td></tr>
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DT Online
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DT Online: Added category link
2014-12-19T15:45:07Z
<p>Added category link</p>
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DT Online
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DT Online: Added Template
2014-12-18T18:29:20Z
<p>Added Template</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 18:29, 18 December 2014</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Alternatively, and for more varied cross sections, there exists an online [http://civilengineer.webinfolist.com/str/micalc.htm '''Calculator for Moments of Inertia for plane sections'''].</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Alternatively, and for more varied cross sections, there exists an online [http://civilengineer.webinfolist.com/str/micalc.htm '''Calculator for Moments of Inertia for plane sections'''].</div></td></tr>
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DT Online
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DT Online: Moments of Inertia
2014-11-09T18:03:17Z
<p>Moments of Inertia</p>
<p><b>New page</b></p><div>[[File:MIsections.jpg|300px|right]]<br />
The [http://en.wikipedia.org/wiki/Moment_of_inertia '''Moment of Inertia ''(MI)'''''] (known more correctly as the [http://en.wikipedia.org/wiki/Second_moment_of_area '''''Second Moment of Area''''']) is used in beam bending equations. It is a measure of how resistant a body is to twisting about the Neutral Axis.<br />
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The [http://en.wikipedia.org/wiki/Neutral_axis '''Neutral Axis'''] will always pass through the [http://en.wikipedia.org/wiki/Centroid '''Centroid'''] of a cross-section. In the case of a simple rectangular or square beams this is in the middle where the diagonals would cross and for round tubes or bars it is the circle centre.<br />
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For these concentric shapes the [http://en.wikipedia.org/wiki/List_of_area_moments_of_inertia '''Moment of Inertia calculations'''] can be simplified as shown opposite.<br />
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Other sections may be considered as being built up from these basic shapes and their Moments of Inertia about a common axis obtained. By addition of these separate Moments of Inertia and/or subtraction of the ‘MI’ for any holes or other missing areas, the ‘MI’ for the whole section can be calculated.<br />
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Alternatively, and for more varied cross sections, there exists an online [http://civilengineer.webinfolist.com/str/micalc.htm '''Calculator for Moments of Inertia for plane sections'''].</div>
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