Question 2

Question 2

Shear Flow question 2

The built-up member above is made by bolting 3 planks of wood together. If the bolts have a diameter of 6 mm, find the average shear stress τ_avg developed in the bolts.

The built-up member above is made by bolting 3 planks of wood together. If the bolts have a diameter of 6 mm, find the average shear stress τ_avg developed in the bolts.

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Step 1:
Calculate ȳ and moment of inertia I

Step 1:
Calculate ȳ and moment of inertia I

Shear Flow solution step 1

Step 2:
Calculate Q at bolt joint

Step 2:
Calculate Q at bolt joint

Shear Flow solution step 2

Step 3:
Use shear flow q to find τ_avg in bolt

Step 3:
Use shear flow q to find τ_avg in bolt

Shear Flow solution step 3

Useful formula:

Useful formula:

Shear Flow formula

Now that you've mastered this question, you can try Question 3.