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Experimental Study and Simulation of the Stress Relaxation Characteristics of Machine-Harvested Seed Cotton
- Source :
- Applied Sciences, Volume 11, Issue 21, Applied Sciences, Vol 11, Iss 9959, p 9959 (2021)
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
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.
- Subjects :
- Technology
simulation of virtual prototype
Materials science
QH301-705.5
QC1-999
Compression molding
Viscoelasticity
Residual stress
Stress relaxation
General Materials Science
Biology (General)
Composite material
QD1-999
Instrumentation
Water content
Elastic modulus
Fluid Flow and Transfer Processes
Universal testing machine
machine-harvested seed cotton
experiment
Physics
Process Chemistry and Technology
stress relaxation
General Engineering
Engineering (General). Civil engineering (General)
Compression (physics)
Computer Science Applications
Chemistry
rheological properties
TA1-2040
mathematical models
Subjects
Details
- ISSN :
- 20763417
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Applied Sciences
- Accession number :
- edsair.doi.dedup.....da83ff8fdf0ee56344be1f93f34fc8e4