A first-order asymptotic analysis of the Griffith energy balance in the Johnson–Kendall–Roberts model of adhesive contact under non-symmetric perturbation of the contact geometry is presented. The pull-off force is evaluated in explicit form. A particular case of adhesive contact between a relatively stiff sphere and an elastic half-space is considered under the assumption that the sphere geometry is changed by the application of an arbitrary lateral normal surface loading. The effect of the sphere Poisson’s ratio on controlling the adhesive pull-off force is considered.

This article is part of a discussion meeting issue ‘A cracking approach to inventing new tough materials: fracture stranger than friction’.

介绍了在接触几何的非对称扰动下粘附接触的 Johnson-Kendall-Roberts 模型中格里菲斯能量平衡的一阶渐近分析。拉脱力以明确的形式进行评估。假设球体几何形状因应用任意横向法向表面载荷而改变，则考虑了相对刚性球体和弹性半空间之间的粘合接触的特殊情况。考虑了球体泊松比对控制粘合剂拉脱力的影响。

这篇文章是讨论会问题“发明新的坚韧材料的破解方法：断裂比摩擦更奇怪”的一部分。