Experimental Study and Simulation of the Stress Relaxation Characteristics of Machine-Harvested Seed Cotton
Source abstract
Abstract
Seed cotton compression molding solves the inconvenience of seed cotton transportation and storage after mechanical harvesting. Stress relaxation is closely related to the performance of the compressed seed cotton. In this study, an electronic universal testing machine with a homemade compression device was used to study the stress relaxation characteristics of machine-harvested seed cotton. The stress relaxation model of machine-harvested seed cotton was established, the influence of test factors on the response indexes was analyzed and, finally, stress relaxation characteristics of machine-harvested seed cotton were simulated. Results show that machine-harvested seed cotton stress relaxation characteristics can be described by the five-element Maxwell model. The equilibrium elastic modulus is negatively correlated with moisture content and cross-section dimensions, and the equilibrium elastic modulus is positively correlated with trash content and compression density. The rapid decay time and the residual stress ratio are negatively correlated with moisture content and compression density, but the influence of trash content and cross-section dimensions are limited. The stress relaxation process of machine-harvested seed cotton was simulated using virtual prototype technology, and the maximum error between the experimental and simulated values was obtained as 4.96%. The feasibility of the virtual prototype technique for the viscoelastic simulation of biomaterials was demonstrated.
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Research context
OpenAlex topics: Textile materials and evaluations · Tree Root and Stability Studies · Research in Cotton Cultivation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Mechanical and Electrical Engineering, Shihezi University, Shihezi 832003, China
Northwest Key Laboratory of Agricultural Equipment, Ministry of Agriculture and Rural Affairs, Shihezi 832003, China
Funding
the Corps Major Scientific and Technological Projects · the Corps Key Field Innovative Team Building Project · the Autonomous Region Graduate Student Innovation Program
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