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ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Systems and Synthetic Biology
Volume 16 - 2025 | doi: 10.3389/fpls.2025.1590054
Elastoplastic fracture behavior of Caragana korshinskii Kom. branches: A discrete element model for biomechanical insights into shrub resource utilization
Provisionally accepted- Inner Mongolia Agricultural University, Hohhot, China
The interaction process between Caragana korshinskii Kom. branches (CKB) and crushing machinery simulated by the discrete element method is complex, necessitating a comprehensive mechanical model to describe the CKB fracture characteristics. This paper establishes a mechanical model for CKB with fracture features based on the fracture mechanical characteristics of CKB, and proposes a parameter calibration method for a discrete element model of CKB based on multiple mechanical properties. The elastoplastic fracture mechanical characteristics of CKB during stem crushing manifest in elastic, elastoplastic, and fully plastic stages. Based on this, a combination of physical experiments and simulation experiments is employed to calibrate the parameters of the CKB discrete element model. The optimal combination of binding parameters for the flexible discrete element model of CKB consists of a normal stiffness of 3.67×10 10 N⋅m -3 , a shear stiffness of 3.42×10 10 N⋅m -3 , a critical normal stress of 6.57×10 8 Pa, and a binding radius of 0.78 mm. The elastic stage force-displacement curve in compression tests is nearly consistent, with a curve fitting equation error of 0.24%, and the error between simulated compression fracture force and actual fracture force is 2.79%. The discrepancies between the simulated and actual fracture forces in the bending, shear, and tensile tests were 4.68%, 4.14%, and 8.64%, respectively, aligning well with the experimental results. Consequently, this model can accurately simulate the elastoplastic fracture mechanical behaviour of CKB during compression, bending, and shear, facilitating exploration of the crushing mechanism of CKB during crushing processes.
Keywords: Caragana korshinskii Kom. discrete element flexible model, Elastoplastic mechanics, Mechanical Properties, peak fracture force, GA-BP-GA
Received: 08 Mar 2025; Accepted: 03 Apr 2025.
Copyright: © 2025 Su, Ma, Liu, Zhang, Yu and Liu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Zhihong Yu, Inner Mongolia Agricultural University, Hohhot, China
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