Inorder to explore the influence of particle shape on the particle fragmentationand strength characteristics of granular materials

this paper proposes a newparameter to quantify the particle shape of granular materials

designs anartificial sample preparation method considering the three-dimensional particleshape feature information

then conducts a conventional triaxial compressiontest for these prepared samples

and analyzes the particle local breakage lawand strength characteristics

finally derives a binary medium strengthcriterion. Some research results are drawn as follow. Quantitative parameter ofparticle shape—spherical modulus is proposed. On thisbasis

five different shapes of triaxial specimens of crushable granular materialswere prepared

and it is found that the spherical modulus affects the triaxialcompressive strength characteristics of granular materials. The particlebreakage of the sample is determined by sieving method

and the evolution lawand critical state of the sample particle breakage is discussed

and particle shape is found to control the nonlinearevolutionary characteristics of macroscopic strength by influencing theparticle fragmentation pattern. Based on the binary medium theory

the strengthcriterion of crushable granular materials considering the particle shape isestablished

and its applicability is verified by experiments results fromconventional triaxial condition.