For tomorrow:
Experiment 2:
Purpose: try to figure out the maximum deflection of a beam under its own weight.
Preparation:
1. How would you model this experiment?
2. Find the maximum theoretical deflection, for the general case of a rectangular cross-section, some
value of E, and some length L.
3. How does the maximum deflection depend on L, and on the flexural rigidity? Is this expected?
4. We will use a strip of ‘plastic’ (unknown material). Think of an experiment to first find out E.
5. Think about how to set up this experiment for best results.
Experiment 3
Setup: like example 12.4, but with arbitrary positioning of the intermediate support.
Purpose: compare the maximum experimental and theoretical deflection of the loaded end, for different
loads; compare the experimental and theoretical location (x) of the maximum positive deflection of the
beam as a function of variable end point load.
Preparation:
1. How would you model this experiment?
2. How would you set up the experiment?
3. Find the theoretical deflection of the end point as a function of load, rectangular cross-section, some
value of E, and relevant geometry.
4. How does your expected location for the most positive value of the elastic curve depend on the load?