Table 3 Calibrated linear and quadratic regression models of compressive properties in terms of RHA content.
Independent variable (x) | Dependent variable (y1,2,3,4) | Linear model | Quadratic model |
|---|---|---|---|
RHA content (wt%) | Ultimate stress (MPa) | \(\:y=0.05x+2.08\) | \(\:y=-0.0053{x}^{2}+0.16x+1.77\) |
Young’s modulus (MPa) | \(\:y=-0.53x+130.82\) | \(\:y=-0.15{x}^{2}+2.51x+122\) | |
Yield stress (MPa) | \(\:y\:=\:0.05x+1.86\) | \(\:y\:=\:-0.0035{x}^{2}+0.12x+1.65\) | |
Plastic work (J/mm3) | \(\:y=0.0085x+0.34\) | \(\:y=-0.0006{x}^{2}+0.02x+0.31\) |
