Effects of multi-sequence combination forces on creep characteristics of bales during wheat harvesting

Abstract

During the baling operation, the wheat stalks are subjected to various mechanisms in the baler and the main form is compression. After the wheat stem is forced by a combination of the threshing cylinder, it needs to be formed under the action of straw baler and meet transport requirements. This paper mainly studies the properties of wheat stalks when baling, and proposes the application of the creep after-effect theory during the baling process. The tension-compression tester was used to perform a 50 mm stalk mechanical test, 50 mm stalk static pressure test, 35 mm×40 mm×50 mm stalk module static pressure test and bale static pressure test. The measured elastic modulus of the stem sample was 7.59 MPa, and the elastic modulus of the inner core of the stem was 8.24 MPa. The return curve of the single stalk and the bale is consistent with the initial creep and steady-state creep in the creep after-effect theory. A logarithmic function was used for fitting of the first stage with coefficient of determination R 2 = 0.8364, and a linear function was used for fitting of the second stage with coefficient of determination R 2 = 0.9921. The high water content static pressure test suggests that the load in the loading direction is the coupled load of the working load of the hydraulic cylinder and the internal stress of the bale. When harvesting wheat stalks with high moisture content, the density parameter of the bale can be appropriately increased while the load parameter of the hydraulic cylinder can be considered unchanged or even reduced. The adjustment of density and load can still ensure the forming quality of the bale.

Compression creep characteristics of crushed sugarcane end-leaves

“…The deformation curve in the holding stage is close to horizontal,and this theory is in line with the creep law of certain density silage. Therefore,the four-component Burgers model was also chosen to analyse the creep characteristics of the crushed cane tail leaves during the holding pressure stage (Tang et al 2021). The relationship equation for the variation of creep history of crushed SEL during holding pressure stage is: Using mathematical statistical analysis software SPSS to fit and regression analysis of the creep curve of the holding pressure stage of crushed SEL under different influencing factors, we obtained the creep characteristic parameters under the conditions of different influencing factors.…”

Design and test of the plant-correcting reel for harvesting lodging garlic plants

“…Different from wheat, rice, rape, and soybean, garlic (Allium sativum L.) is a typical vegetable and herb of the genus Allium in the family Liliaceae [15] . According to its morphology and purpose, it can be divided into two types, namely bolt garlic and non-bolt garlic, among which, non-bolt garlic maturing in different periods is a widely cultivated variety currently.…”

Effect of Cyclic Loading Treatment on the Compression Energy and Creep Properties of Machine-Harvested Seed Cotton

“…However, the density of the existing harvesting and packaging machine could reach 199-240 kg/m 3 [9]. Research results on other agricultural materials are more abundant, and the theory is more well established [10][11][12]. Xiao et al [13] outlined the creep properties of rice seedlings by using the Burgers model and showed that different load levels have an influence on creep parameters.…”