# gst: attraction-controlled torque organization and rotational states in frictional granular matter.

<< In this study, (AA) numerically investigate how interparticle attraction affects stress transmission, torque organization, and particle rotation in a two-dimensional frictional granular material. Although the attraction is a central force and exerts no direct torque on the particles, it strongly modifies the contact network and particle rotation. >>

<< Attraction produces a low-rate stress state and selects the high-stress state near the shear-thickening regime of the dry system, while leaving the high-rate thickened state almost unchanged. By decomposing the shear stress, (AA) find that the direct attractive contribution accounts for only a fraction of the total stress, while the repulsive contribution is strongly enhanced. >>

<< Attraction increases the coordination number and torque amplitude and can reverse the local torque-sign correlation. At low packing fractions and intermediate shear rates, a stress-collapse state emerges with strongly suppressed torque and rotation despite a finite contact network. >>

<< These (AA) results show that attraction controls macroscopic rheology through reorganization of the frictional contact network. >>

Kiwamu Yoshii. Attraction-controlled torque organization and rotational states in frictional granular matter. arXiv: 2609.35270v1 [cond-mat.dis-nn]. Sep 28, 2026.

https://arxiv.org/abs/2609.35270

Also: particle, network, in https://www.inkgmr.net/kwrds.html 

Keywords: gst, particle, network, 2-D frictional granular particles, attraction, repulsion, shear stress, low- high- rate stress state, stress transmission, stress-collapse state, torque organization, torque amplitude, particle rotation, shear-thickening regime, frictional contact network.