Stress-Strain Relationship
摘要
In order to properly ascertain the response of an arbitrary body (Fig. 2.1), one needs to do very controlled measurements (Fig. 2.2). For illustration purposes consider the measurement of the displacement ( \(u+\varDelta u\) ) of point B, the displacement of point A of the sample (u) and the difference between them, divided by the original length ( \(\varDelta x\) )