Abstract

The development and evolution of the force chain in a granular system is an important factor that affects the stability of granular systems. In this work, the displacement threshold ($S_C$) and angle threshold (${\theta }_d$) are proposed, and a new method to predict the damage point in the force chain is introduced and verified. A two-dimensional steel ball particle system under concentrated loading is analyzed; during the deformation process, images are constantly recorded by a CCD camera. Based on the digital image correlation method, the displacement and movement direction of each particle in the steel ball particle system is analyzed, and a prediction analysis of the damage point in the force chains is performed.

© 2017 Optical Society of America

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