Hybrid Broussonetia Papyrifera Stem Discrete Element Bonding Parameter Calibration and Cutting Test

Key Points

• The aim is to develop a discrete element model of hybrid Broussonetia papyrifera stems and optimize cutting parameters.
• Constructed a dual-layer discrete element model using a three-axis spatial coordinate method.
• Employed Design Expert software for experimental design including Plackett-Burman and Box-Behnken tests.
• Validated model parameters through comparison with experimental shear force results.
• Optimized the structure of the cutting device based on system analysis and simulation.
• Developed an interaction model using DEM-MBD for cutting performance evaluation.
• Optimal bonding parameters achieved with a normal stiffness of 2.705e×1010 and a shear radius of 1.206.
• Simulation results showed a relative error of 1.97% compared to measured maximum shear force.
• The best blade parameters included a sliding angle of 28.57° and a cutting edge angle of 41.11°, with a thickness of 2.34mm.
• The optimized blade design resulted in a relative error of only 0.95% compared to predicted cutting force.

Abstract