The first part of post my 20 was about your post 14!dont worry got it, can someone reply to my other question. thanks post 14
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The first part of post my 20 was about your post 14!dont worry got it, can someone reply to my other question. thanks post 14
Is area of a disk not = pi d^2/4 ??A steel bar has diameter 50mm
Force = 40x10^3 Newtonsit can be either pi d^2/4 or pi x r^2. both give same result.
but in your example first line should it not be...... stress = FA/area
stres = 4 x 10^3 / pi d^2/4???
Yes you have spotted something. Post 7 was an error, copying for the Wiki article. Sorry. The later post has the correct expression.also in post 7 you said:
'strain = gauge factor x change of resistance/original resistance'
but in your example on post 24 in your notes you said:
'change of resistance/original resistance = gauge factor x strain'
by Aaron Carman
by Duane Benson