RESEARCH PAPER
Mechanical characterization of failure mechanisms during the cutting of Caragana korshinskii Kom. branches
1
College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
Final revision date: 2024-10-22
Acceptance date: 2024-10-23
Publication date: 2024-12-09
Corresponding author
Zhihong Yu
College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, China
College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, China
Int. Agrophys. 2025, 39(1): 41-51
HIGHLIGHTS
- A failure characterization test for CKB was designed
- The mechanical property change pattern of CKB failure is introduced
- The range of mechanical parameters characterizing CKB failure was determined
KEYWORDS
Caragana korshinskii Kom. branchcrushingmechanical propertiesresponse surface testingsampling position
TOPICS
Plant BiomechanicsDrying TechnologyAgricultural and Biosystems EngineeringCereal Quality and Processing
ABSTRACT
The mechanical properties related to the failure of Caragana korshinskii Kom. branch is critically important for the design of stem crushers. This paper studies Caragana korshinskii Kom. branch, focusing on shear and transverse compression tests. When the external load surpasses the strength limit, the internal structure of Caragana korshinskii Kom. branch undergoes damage and cracking. As cracks accumulate, expand, and fuse, CKB deforms and fractures. The failure process is characterized by elastic, elastoplastic, and plastic fracture, indicating that the yield strength varies. The sampling position and moisture content significantly influence the maximum shear strength and compressive strength, with the sampling position being particularly impactful. Shear and transverse compression tests illustrate the development process of CKB. Additionally, second-order response models for the relationship of the CKB moisture content, sampling location, and loading rate with shear strength and compressive strength were constructed. The p-values of the models were all less than 0.01, with determination coefficients exceeding 0.98, adjusted determination coefficients over 0.96, and coefficients of variation being 8.78 and 6.51%, respectively. Furthermore, the shear failure range spanned from 37.25 to 158.94 MPa, and the compression failure range extended from 12.32 to 63.93 MPa. In summary, to achieve effective chopping of CKB, the applied force must exceed the maximum shear strength of 158.94 MPa and the compressive strength of 63.93 MPa.
FUNDING
National Natural Science Foundation of China (52265035), Inner Mongolia Autonomous Region Natural Science Foundation (2022MS05049), Research Program of science and technology at Universities of Inner Mongolia Autonomous Region (NJZZ23047), Program for improving the Scientific Research Ability of Youth Teachers of Inner Mongolia Agricultural University (BR230154).
CONFLICT OF INTEREST
The Authors declare that they have no conflict of interest.
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