Johnson-Kendall-Roberts (JKR) Contact Model

The contact theory developed by Johnson, Kendall and Roberts (Johnson et al., 1971) is known as the JKR model and is an extension of the well-known Hertz contact model.

The model accounts for attraction forces due to van-der-Waals effects. It can however be also used to model material where the adhesion is caused by capillary or liquid-bridge forces (Hærvig et al., 2017, Morrissey, 2013, Xia et al., 2019).

This implementation of a JKR model for PFC 6.0 has been tested in PFC3D Version 6.00.27, and not tested with PFC2D.

Normalised force and normalised contact patch radius of the JKR model as a function of normalised overlap

Keywords

  • cohesion, adhesion, JKR, van-der-Waals, PFC
Johnson-Kendall-Roberts (JKR) Contact Model

UDM Version: 1
Release Date: Jan 28, 2021

Category: Soil

Software:
  • PFC (PFC3D 6.0)
Download: User Guide: Contact: Developer:

Latest News
  • ARMA 2022 Student Design Competition Congratulations to the winners of the American Rock Mechanics Association's (ARMA) 2022 Student Design Competition....
    Read More
  • International Slope Stability 2022 Itasca is proud to be a Diamond sponsor of Slope Stability 2022 (October 17-21 |...
    Read More
  • Software Benchmark Tests To help with your hardware configuration decisions, Itasca has created an online benchmark speed test...
    Read More

Upcoming Events
27 Mar
FLAC3D In-Person Introductory Course
Live in-person introductory training course. This 3-day course provides general feature training addressing basic concepts and recommen... Read More
30 Mar
Griddle In-Person Introductory Course
Live in-person introductory training course. This course provides an overview of the capabilities and features of Rhino3D CAD software ... Read More
3 Apr
FLAC2D In-Person Introductory Course
Live in-person introductory training course. This 3-day course provides a general overview of FLAC2D and covers many basic concepts and... Read More