Effect of particle shape on dry density and shear strength of loess
To investigate the influence of loess particle shape on the mechanical properties of loess,SEM images of loess from the Yan'an area were processed and the particles in the images were ellipticalized.Discrete Element Method(DEM)simulations were then used to conduct biaxial compression tests.The effects of different percentages of angular,sub-angular,sub-circular,circular and polar particles on the dry density and shear strength of loess were studied,and the evolution of numerical simulation test results was analyzed from the micro level.The results show that when thejoint roundness(CCR)and the joint ellipticity(ECR)decrease,that is,when the percentage content of irregular and flat particles decreases,the dry density increases and the shear strength decreases.
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