Table 2 Contact pressure and interfacial shear strength using the Hertz and JKR models
From: Friction and Shear Strength at the Nanowire–Substrate Interfaces
Sample | Silver 1 | Silver 2 | Silver 3 | ZnO 1 | ZnO 2 | ZnO 3 |
|---|---|---|---|---|---|---|
Tip radius R(nm) | 27 | 27 | 29 | 25 | 40 | 25 |
Tabor’s parameter | 2.28 | 2.28 | 2.33 | 2.05 | 2.39 | 2.05 |
Hertz model | ||||||
Contact radius a(nm) | 4.79 | 4.87 | 5.93 | 3.90 | 4.69 | 4.09 |
Contact pressure (GPa) | 3.65 | 3.72 | 4.21 | 3.90 | 2.94 | 4.09 |
Shear stress τ(MPa) | 451 | 425 | 362 | 390 | 445 | 402 |
JKR model | ||||||
Contact radius a(nm) | 8.d | 8.68 | 9.58 | 8.32 | 11.1 | 8.40 |
Contact pressure (GPa) | 1.21 | 1.17 | 1.61 | 0.86 | 0.52 | 0.97 |
Shear stress τ(MPa) | 139 | 134 | 139 | 85.6 | 78.9 | 95.3 |