P10221: Baja 1 (Baja Driveline Test Development)
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Shear Bolt Analysis

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Theoretical Calculations to determine hub shear bolt breaking torque:

Givens/Assumptions:

Calculations:

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Case 1, 7/64" Dia:

Case 2, 3/32" Dia:

Case 2, in reverse:

32.8 lb-ft of torque at Briggs is theoretically where the 3/32" shear bolts should break

Experimental Results to determine hub shear bolt breaking torque:

With the help of Tim Landshoot, the P10221 team was able to perform the shear bolt testing ahead of schedule. The MTS Tensile Compression equipment in the Mechanics Laboratory was used for the following Tests. The tests were done using the 2500lb load cell configuration in the machine, with 10HZ sampling, and a .05 in-min separation rate. These were all chosen values to fit our application best.

Test Fixture Details:

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Summation of results:

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Comparison of Analytical and Experimental Results:

This represents only 3% error for torque.

This represents only 10% error for shear stress.