ENG1001 Lecture Notes - Lecture 7: Neutral Axis, Centroid
30 May 2018
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HAVE%to%find%neutral%axis%before%calculating,%since%y%frm%top%!=%y%frm%
bottom
•
Centroid%of%all%the%rectangles%can%NEVER lie%on%same%line
•
Locating-NA
Condition:%For%a%cross-section%in%equilibrium%with%bending%moment%only,%T%+%C%=%
0.
Parallel-Axis-Theorem
Bending-stress
Week$7:$Centroid$and$I$for$Asymmetrical$section$of$beam
Saturday,%2%September% 2017
17:52
HAVE%to%find%neutral%axis%before%calculating,%since%y%frm%top%!=%y%frm%
bottom
•
Centroid%of%all%the%rectangles%can%NEVER lie%on%same%line•
Locating-NA
Condition:%For%a%cross-section%in%equilibrium%with%bending%moment%only,%T%+%C%=%
0.
Parallel-Axis-Theorem
Bending-stress
Week$7:$Centroid$and$I$for$Asymmetrical$section$of$beam
Saturday,%2%September% 2017 17:52
