Half of the join to have the same number of rivets

  • Thread starter dixonmayte
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In summary, the problem involves determining the number of 6mm diameter rivets needed for a joint with a maximum allowable shear stress of 8Mn/m2 and a shear force of 2.25KN. The attempt at a solution involves using the equation T=F/A and calculating the area using A=II(pie)xD2/4. The final answer is 6 rivets, with 3 on each side.
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dixonmayte
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Homework Statement





i am given a picture called fig1 which is just a normal 2 lap joint.

the question is assuming each half of the join to have the same number of rivets, determine how many 6mm diameter rivets would be needed in the joint if the maximum allowable shear stress in the rivet material is 8Mn/m2 and the shear force applied is 2.25KN


2. Homework Equations

T(tau)= F(force) divided by A(area)



The Attempt at a Solution



A=F
T

A=2.25x103
8x106

=2.8125x10-4 x2
=5.625x10-4

A=II(pie) x D2(diemeter squared)
4

which transposes to
D2= Ax4
II(pie)

D2= 5.625x10-4m2 x4
II(pie)

D2=7.161972439x10-4

square root that answer to get D=26.76186174x10-3m
D=26.8mm
6
=4.46 which would round up to 5 rivets. but it ant b a odd number so you add 1rivet to make 6 rivets 3 on each side.

I have been told this answer is wrong and really need help solving the problem
 
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  • #2


Why have you worked out D = 26.8, when D is given as 6 mm?
 

1. How do you determine the number of rivets needed for half of a join?

The number of rivets needed for half of a join can be determined by dividing the total number of rivets required for the entire join by two.

2. What factors influence the number of rivets needed for half of a join?

The number of rivets needed for half of a join can be influenced by the type of material being joined, the thickness of the materials, and the strength and spacing requirements for the join.

3. Is the number of rivets needed for half of a join always half of the total number?

No, the number of rivets needed for half of a join may not always be exactly half of the total number. It is important to consider the factors that influence the number of rivets, as mentioned in the previous answer.

4. Can the number of rivets be calculated using a formula?

Yes, there are specific formulas that can be used to calculate the number of rivets needed for a join based on the materials and join requirements. However, these formulas may vary depending on the specific situation and it is important to consult with a professional for accurate calculations.

5. Why is it important for half of a join to have the same number of rivets?

Having an equal number of rivets on each side of a join helps distribute the load and stress evenly, creating a stronger and more secure connection. Uneven distribution of rivets can lead to weak points in the join and potential failure under stress.

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