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Shear Stress vs Tensile Stress
Ultimate Tensile Strength = Su, Ultimate Shear Strength = Ssu,
Tensile Yield Strength = Syp, Shear yield point = Ssyp
Note: The relationships below are very approximate for use only as an rule of thumb estimate if no other source of information is available...
|Wrought Steel & alloy steel||Ssu = Approx 0,75 x Su||Ssyp = Approx 0,58 x Syp|
|Ductile Iron||Ssu = Approx 0,90 x Su||Ssyp = Approx 0,75 x Syp|
|Malleable iron -Pearlitic||Ssu = Approx 1,0 x Su||-|
|Wrought iron||Ssu = Approx 0,83 x Su||-|
|Cast Iron||Ssu = Approx 1,3 x Su||-|
|Copper/ & alloys (See Note below)||Ssu = Approx 0,65 x Su||-|
|Aluminium/ & alloys||Ssu = Approx 0,65 xSu||Ssyp = Approx 0,55 x Syp|
Machine design Theory and Practice .A.D.Deutschman, W.A Michels & C.E. Wilson..
MacMillan Publishing 1975.
Machinery's Handbook 27 th ed.
Note: The original data is based generally on the reference above and I have completed a very crude review to confirm the information. The copper information is however very suspect..
For copper the reference above gives a value of Ssu = Approx 0,9 x Su...On reviewing a number of copper alloys there is a wide spread from about 0,5 to 0,9 the 0.9 applied to one leaded brass cast alloy. I am tempted to remove copper from the table but as a very crude average I have simply changed the value to 0,65 please use with care or better still do not use...
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Last Updated 23/03/2010