Engineering Science 1021A/B Lecture Notes - Lecture 6: Shear Stress
17 May 2018
School
Department
Professor
If a bar of length (
!"
) and a cross sectional area (
#"
) is subjected to a load
$
, it
will elongate an amount
%&
•
If the load exceeds the max force (
$
'
), the bar with permanently deform
•
Area
Length
Max Force
Elongation @ Max
Force
Max
Stress
Strain @ Max
Stress
#"
!"
$
'
%!'
$
'
#"
( )'
%!'
!"
( *'
+#"
!"
+$
'
%!'
#"
+!"
$
'
+%!'
Cross section area is directly proportionate to max force
○
Length is directly proportionate to elongation @ max force
○
Engineering Stress:
) ( ,
-.
Units:
/
01(23
4
556(723
§
○
•
Engineering Strain: e
(%8
9.
Units:
:
:(;<
units
%&
!"
=>?? ( @
§
○
•
Tensile Stress & Strain
Shear Stress
Shear stresses act in a direction that is in the plane of the cross-section
•
A ( $
#"
Units: /
01(23
○
4
556(723
○
•
B ( %C
D
Units: 0
0(Eno units
○
•
Engineering Stress & Strain
