PE MDM Joints and Fasteners Important question

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Saurabh9978

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Hello Friends , 

For the section 2.18 of Mechanical PE reference book , I have reviewed some material and all are having different method for below topic , which is confusing for me and want to learn 

for the failure mode : Failure by bearing stress : reference books says A= projected area of single rivet =td 

what if there are multiple rivets in same row ? or multiple rivets with multiple row ?

do we need to count total number of rivets for that ? just like Shear mode of failure or not ? 

Shigley solved and unsolved problems are not having same solution , (some are with total rivet counted and some are only one rivet)

I assume this is one of the important topic for the exam and I have my exam next week, your help will be appreciated 

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