With W as the weight applied to the free end of the cantilever, L as the distance from the end of the cantilever, b as the length of the cantilever's base, and h as the height of the cantilever. From the above equation, we know that (for a constant load) the value of 𝜀𝜀/𝐿𝐿 is constant everywhere on the bar. In testing, holding a test cantilever and gauge loaded for a period of several hours did not yield a significant change in the measured strain. Therefore, we can conclude that the gauge and the sample are rigidly fixed to the cantilever. Thus, the average strain in the electrolyte (𝜀𝜀 𝑎𝑎𝑎𝑎𝑦𝑦𝑐𝑐𝑎𝑎 ) is related to the measured strain in the gauge by