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General
Notes on Plane Stress and Plane Strain
Strain
gages are used to measure strains of the body and are typically mounted on the
surfaces, since there are no normal/shear tractions on the surface.
A state of '' plane stress'' can be assumed.
Problem:
If the principal strains at a given strain gage indicate 0.004 and 0.001 in/in,
what is the principal stress at that location.
A
state of plane stress exists,
|
Material |
Modulus of
elasticity,
|
Shear
modulus, |
|
|
Aluminum alloys Copper Steel (plain Carbon and low-alloy) Stainless steel (18-8) Titanium Tungsten |
10.5(72.4) 16.0(110) 29.0(200) 28.0(193) 17.0(117) 58.0(400) |
4.0(27.5) 6.0(41.4) 11.0(75.8) 9.5(65.6) 6.5(44.8) 22.8(157) |
0.31 0.33 0.33 0.28 0.31 0.27 |
