TY  - JOUR
AU  - Li, Jinming
AU  - Zhang, Jiaxi
AU  - Wang, Yichao
AU  - Yu, Jiangtong
AU  - Xing, Chunxiao
PY  - 2026
TI  - Parameter calibration of a discrete element model for a mixture of cotton stalks and residual film
JO  - International Journal of Agricultural and Biological Engineering
SN  - 1934-6344
SP  - 80
EP  - 88
VL  - 19
IS  - 3
AB  - To address the issue of insufficient accuracy in the discrete element simulation model for cotton stalk -residual film mixtures, this paper employs the Hertz-Mindlin model with the JKR contact model to calibrate the contact parameters. First, significant parameters affecting the angle of repose were identified using Plackett-Burman experiments. Subsequently, the optimal parameter range was determined in conjunction with the steepest climb test. A regression model was constructed using Box-Behnken experiments to optimize the parameters, yielding the optimal parameter combination: cotton stalk-residual film rolling friction coefficient of 0.46, residual film-residual film rolling friction coefficient of 0.31, residual film-steel rolling friction coefficient of 0.47, and residual film-residual film JKR surface energy of 0.41 J/m2. Simulated pile-up tests were conducted on a mixture of cotton stalks and residual film using these optimal parameter combinations. The results showed that the error between the simulated and measured angle of repose was only 3.06%, validating the reliability of the parameters and providing a basis for research into the interaction characteristics between cotton stalks and residual film during film recovery.
UR  - https://doi.org/10.25165/j.ijabe.20261903.10246
DO  - 10.25165/j.ijabe.20261903.10246