Abstract
This paper aims to develop a discrete element method (DEM) framework applicable to two-dimensional star-shape particles with concave features. Particle contours are represented by the Fourier series expansion of radii to take advantage of its limited number of coefficients. The essential ingredients of DEM, i.e., contact detection and contact resolution, are tailored to consider the possible concave feature of star-shape particles and the overlapping area of particles. A multilevel method is adopted to identify possible multiple contacts between two particles or between a particle and a boundary. The approaches for determining the contact geometric features of both convex-shape and concave-shape overlapping areas are presented. The methods to calculate the contact forces and to determine the overlapping area-based normal contact stiffness are provided. With the developed DEM program-SSP2D, three series of numerical tests are conducted to demonstrate its capability and efficiency in modeling dynamic and pseudo-static behaviors of concave particles.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
