The residual Young’s modulus was calculated from the stress-strain relations measured using strain gages. 6061 Young’s modulus is nearly constant for all temperatures with an as-received value of 69.5 ± 6
G represents the shear modulus of pure aluminum, b is the Burgers vector, and ρ is the dislocation density. Fig. 12 presents the calculated contribution of the ultimate tensile strength (UTS) of the sample. Here, Δσ0 represents the size of the actual sample. The UTS growth trend ...
However, Young's model is an ideal condition, which only applies to smooth or ideal surface. Actually, there is no absolutely smooth and uniform solid surface, and all of them will have certain roughness. At this time, there is a big difference between the real contact angle and the predic...