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
  • Seamless Integration of Site Data for Improved Mining Analysis Now Available for IMAT: Seamless Integration of Site Data for Improved Mining Analysis...
    Read More
  • Now Available from ITASCA: Innovative Machine Learning Tool for FLAC3D/FLAC2D V9.2 Experience the Future of Geotechnical Modeling with ITASCA Software V9.2: Introducing Machine Learning Models...
    Read More
  • Experience the Future of Geotechnical Modeling with ITASCA Software V9.2 Experience the Future of Geotechnical Modeling with ITASCA Software V9.2: Introducing Machine Learning Models and...
    Read More

Upcoming Events
12 May
“Getting Started With Dynamic Modeling in FLAC3D
This training supplies the tools needed to describe and apply the workflow for dynamic analysis in FLAC3D, demonstrating a comprehensiv... Read More
11 Jun
Python in Itasca Software
This course provides an overview of the Python programming language in Itasca software.The course covers major applications of Python t... Read More
16 Jun
IMAT Training: Revolutionizing Mining Analysis with Seismology & Numerical Modeling
Hands-on learning with IMAT’s latest upgrade enhances mine modeling and seismology, uniting open-pit and underground mining capabilitie... Read More