Damage point prediction of a force chain based on the digital image correlation method.

Applied optics

PubMedID: 28157923

Chen F, Zhuang Q, Wang R, Guo P. Damage point prediction of a force chain based on the digital image correlation method. Appl Opt. 2017;56(3):636-643.
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 (SC) and angle threshold (?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.