Finding the max. deflection of the beam

1. Oct 5, 2009

farry1024

For the Electronic Bathroom Scale. The maximum load on a
beam is assumed to be 75kg.

(a) Find the max. deflection by using the Young’s Modulus
E=200,000 N/mm². Is it small? Also see next page for the
dimensions of the beam. Hint: For small deflection, tan phyter » phyter.
Use the given Excel template file if needs.

(b) Determine the relationship of the applied load (say, mass in kg
here!) against the beam surface strain (e). Hint: Using Excel to
calculate the Bending Moment at the surfaces of the beam first.
Then use the equation (M/I)(h/2) = Ee.

(c) What have you observed?

What formula should I use the find the max. deflection?

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2. Oct 5, 2009

nvn

Hi, farry1024. The PF rules state we are not allowed to tell you how to approach or solve your homework problem. See the required homework template when you start to create a new thread in the homework forums. You must list relevant equations yourself, and show your work; and then someone might check your math.