To determine the parameters of the whole corn stalks shearing, single factor and multi factor tests were carried out by using node and internode critical shearing strength as the evaluation indexes and the moisture content, sampling location and shearing speed as the influencing factors. The results showed that the moisture content, sampling location and shearing speed had significant effects on the critical shearing strength of internodes and nodes (F > F0.05), the order of the influencing factors on the internode and node critical shearing strength were: moisture content >sampling location >shearing speed and sampling location >moisture content >shearing speed. By using Design-Expert and Desirability Function Approach, the optimization problem of three response values, including difference value of critical shearing strength between node and internode at the same segment (DV), the node and internode critical shearing strength, was transformed into a single response value optimization. The corn stalks with a moisture content of 15% had lower shearing strength and higher shearing stability at the shearing speed of 25 mm/min.
HighlightsA detection clamp for the rind-pith adhesive strength of corn stalks based on peeling method was designed.A rind-pith adhesive strength detection method was proposed taking average peeling strength as the test index.The characteristics of rind-pith adhesive strength were analyzed, and a mathematical model between average peeling strength and influencing factors was established.Abstract. Rind-pith separation of corn stalks is one of the effective measures for realizing high-value utilization of stalks. Therefore, it is necessary to study rind-pith adhesive strength of stalks and its influencing factors to determine effective separation methods. In this study, a peeling method was put forward and single factor and multi-factor tests were carried out to explore the rind-pith adhesive strength. The analysis of single factor tests showed that sampling location, moisture content, and peeling speed were all significant on the average rind-pith peeling strength and the Fp = 25.70 > F0.05 (4, 20) = 2.87, Fm = 112.46 > F0.05 (4, 20) = 2.87 and Fs = 231.21 > F0.05 (6, 28) = 2.45. The mathematical model between average peeling strength and influencing factors was established through multi-factor tests. The model was analyzed and optimized, and the significance sequence of influencing factors is sampling location > moisture content > peeling speed, and the effect of interaction between moisture content and sampling location was significant (P<0.05). It can be concluded that the rind-pith peeling strengths of internode sections among 1st-7th internodes of corn stalks were 360.09-450.01 N/m, which are smaller and more favorable for mechanical separation for stalks with moisture content of 15%-20% and at peeling speed of 30-40 mm/min. The results of this study may provide a theoretical reference for the modeling of corn stalks and the subsequent simulation and optimization of rind-pith separation machines. Keywords: Average peeling strength, Adhesive strength, Corn stalks, Rind-pith Separation.
To realize the integrated technology of biochar return to the soil, the key components of the biochar discharge system applicable to the biochar return machine were designed, and the force analysis of the return shovel was carried out to obtain the main working parameters affecting the effect of biochar return. Single factor and multi factor simulation tests were conducted with the coefficient of variation of biochar content uniformity as evaluation indexes, and outlet distance, conduit diameter, baffle angle as influencing factors. The data were processed and parameters were optimized using Design-Expert, and the results were optimized and experimentally verified. The results from the experimental the coefficient of variation of biochar content uniformity and simulation data from the model showed good agreement. Therefore, the procedures of this study can be used for the integrated technology of biochar return.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.