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11.2 TYPES OF STRESS


À  p

Consider an example of using a pair of scissors ("shears") to cut a piece of metal,



Consider the simple example given below,



By convention we will always define tension as a positive stress, and compression as a negative stress.



Single Shear - These calculations are commonly used when examining rivets and bolts. Consider the example below with the bolt in single shear.



Double Shear - Now consider a bolt that is exposed to double shear. Below we can see a section view of a pin through two members.



Bearing Stress - We may also consider how the force on a pin effects the surrounding material. In the figure below we are finding the bearing stress. In this case the bearing stress will be a normal stress.



The bearing stress as shown only needs to be considered when the member is in tension.

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