 ##  [Johnson-Kendall-Roberts (JKR) Theory](/index.php/johnson-kendall-roberts-jkr-theory) 

  ##  [Johnson-Kendall-Roberts (JKR) Theory](https://engineering.quantumdictionary.io/johnson-kendall-roberts-jkr-theory-0) 

  
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**Engineering &amp; Applied Technologies Dictionary**

 
Definition

A continuum contact-mechanics model for two elastic, smooth, isotropic bodies (commonly spheres) that couples Hertzian elastic deformation with surface energy (work of adhesion) to predict contact radius, load–displacement relation and pull-off force under adhesive contact, assuming linear elasticity, no plasticity, and contact-localized adhesive forces.