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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