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Wedging Energies
graph Energy /mJ 100 90 80 70 60 50 40 30 20 10 0 4 8 12 16 20 c /mm
We start with the expression for the elastic strain energy in the bent strip of material:
\[ U_E=\frac{Ed^{3}h^{2}}{8c^{3}} \]
graph >
We then include the energy required to create two new surfaces:
\[ U_S=cR \]
graph >
We then sum the two together to give us our full energy expression:
\[ U=\frac{Ed^{3}h^{2}}{8c^{3}}+cR \]
Now let us have a look at what happens when we move our wedge.
c