scholarly journals Experimental study of the S-shaped load element of the soil tillage machine

2021 ◽  
Vol 7 (Special) ◽  
pp. 9-9
Author(s):  
Nikolay Ustinov ◽  
◽  
Vitaly Mikhailov ◽  
Felix Bulatov
Keyword(s):  
Experimental Study ◽  
Hydraulic Drive ◽  
Soil Tillage ◽  
Maximum Pressure ◽  
Traction Forces ◽  
Load Bearing ◽  
Soil Cultivation ◽  
Bearing Element ◽  
Tubular Element

This article discusses the design of the strut of a tillage machine in the form of an S-shaped power element, using flexible tubular elements (Bourdon springs). Racks of this type are proposed for copying the soil microrelief, maintaining the depth of soil cultivation using a hydraulic drive. The possibility of using the S-shaped rack of the tool of the tillage machine, using flexible tubular elements, to ensure the copying of the soil micro-relief, compliance with the specified working depth, has been experimentally proved. Evaluation of the sensitivity and traction capacity of the S-shaped load-bearing element of the rack will allow us to speak of the ability to create displacements within 120 mm and traction forces up to 1600 N, at a maximum pressure of 6 MPa. Keywords: SOIL TILLAGE, TOOL TILLAGE, FLEXIBLE TUBULAR ELEMENT, DEPTH OF SOIL TILLAGE

An experimental study of the effects of moisture variations and gradients in the joint area in steel-timber dowel joints

Holzforschung ◽  
2008 ◽  
Vol 62 (2) ◽  
pp. 243-247 ◽  
Author(s):  
Johan Sjödin ◽  
Erik Serrano
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Climate Changes ◽  
Mechanical Load ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Moisture Effect ◽  
Joint Area ◽  
Moisture Effects ◽  
Induced Stresses

Abstract This experimental study examines the influence of moisture variations on the load-bearing capacity of steel-timber dowel joints. The glulam specimens used to manufacture the joints were first exposed to controlled climate changes. After being stored in the climate chambers, holes were drilled and dowels were inserted. Then, the joints were loaded to failure. The main aim of this study was to investigate how and to what extent moisture variations and gradients in the joint area affects the load-bearing capacity in tension parallel to the grain. The load-bearing capacity was found to be reduced under these conditions when compared to reference joints. Moreover, the brittleness of the joints increased with the time the joints had been exposed to drying. Moisture-induced stresses and cracks in the joint area were found to be a possible explanation of the results. A similar interpretation was given in other studies where other structural timber elements have been studied. This raises an important question of how such moisture effects should be considered in design codes. One possibility is to include the influence of moisture-induced stresses in the k mod factor used in Eurocode 5. Another way could be to consider this type of moisture effect as an equivalent mechanical load case.

scholarly journals Justification of optimal design and technological parameters of needle discs of the combined working body

2020 ◽  
Vol 17 ◽  
pp. 00016
Author(s):  
Alexander M. Petrov ◽  
Sergey A. Ivanayskiy ◽  
Mikhail A. Kanaev ◽  
Oleg M. Parfyonov ◽  
Maxim S. Ivanayskiy
Keyword(s):  
Optimal Design ◽  
Quality Indicators ◽  
Soil Tillage ◽  
Technological Parameters ◽  
Research Results ◽  
Soil Cultivation ◽  
Working Bodies ◽  
Rotor Tooth

The aim of the research is to improve soil tillage quality using combined working bodies in surface cultivation. There are various designs of combined tillage units including passive cultivators and active rotor-tooth working bodies cultivating land. However, an analysis of design and technological parameters of modern cultivators shows that they have a cumbersome design, required much metal and their quality indicators do not meet soil cultivation requirements. The article presents results of the studies on the influence of geometric and technological parameters of an additional battery of needle discs on land tillage quality. Using the research results, the land tillage has been improved and combined working bodies have been developed.

scholarly journals Experimental study of load bearing cold-formed steel wall systems under fire conditions

2013 ◽  
Vol 65 ◽  
pp. 72-92 ◽  
Author(s):  
Shanmuganathan Gunalan ◽  
Prakash Kolarkar ◽  
Mahen Mahendran
Keyword(s):  
Experimental Study ◽  
Load Bearing ◽  
Cold Formed Steel ◽  
Fire Conditions

The experimental study of glass multilayer columns using digital image correlation

2019 ◽  
Vol 1 (96) ◽  
pp. 32-41
Author(s):  
B. Demchyna ◽  
M. Surmai ◽  
R. Tkach
Keyword(s):  
Experimental Study ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Image Correlation ◽  
Building Structures ◽  
Load Bearing ◽  
Regulatory Documents ◽  
Triplex Glass ◽  
Calculation Methodology ◽  
Glass Columns

Purpose: The purpose of the research is to study the deformability of glass multilayer columns at the central compression using digital image correlation. It becomes possible to use the method of digital image correlation for the experimental study of load bearing building structures of glass. Design/methodology/approach: The approach which has been used to solve the above problems is to conduct an experimental study of glass columns on central compression, in which deformations were measured using digital image correlation. Findings: The possibility of using load bearing building structures of glass triplex has been discovered. A program of experimental studies was developed. It included the testing of prototype samples on central compression with rigid fastening. On the basis of the obtained results, a graph of dependence of relative deformations on normal tension, graphs of the dependence of the bending of columns on load in different planes, and a modulus of elasticity of triplex glass have been determined. Research limitations/implications: The lack of a calculation methodology and regulatory documents for designing load bearing building structures of triplex glass increases their cost, since each project is individual and requires the experimental research. Practical implications: Using the approaches developed in the paper, the method of digital image correlation, which is to measure deformations when testing glass structures on central compression can be applied. Originality/value: The experimental study is probably the first one in which deformations of glass columns are determined using the method of digital image correlation, so it is new and original. The lack of a calculation methodology and regulatory documents for designing load bearing building structures of triplex glass, increases their cost, since each project is individual and requires the experimental research.

Influence of receptions of the main processing of the soil, fertilizers and means of protection of plants on a contamination, agrophysical properties of the soil and efficiency of barley

10.12737/3832 ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 139-143
Author(s):  
Спичков ◽  
Sergey Spichkov ◽  
Фомин ◽  
Vladimir Fomin
Keyword(s):  
Field Experiments ◽  
Plant Protection ◽  
Plant Protection Products ◽  
Soil Treatment ◽  
Soil Tillage ◽  
Soil Cultivation ◽  
The Third ◽  
Subsurface Treatment ◽  
Pre Treatment ◽  
Sowing Seed

The field experiments with barley of multiserial Vakula variety were conducted on gray forest soil of Kama region of theRepublic of Tatarstan. This experiment was carried out to identify the responsiveness of barley for fertilizers, methods of the basic soil cultivation and plant protection products. On average over three years of our research, the highest yield of barley (3.95 tons per hectare) was obtained in the flattered soil tillage and carrying out the calculated fertilizernorm in the way, when we used the seed protectant Stinger for pre- treatment of the soil. The yield was a little lower (3.88 tons per hectare), when we used Binoram for pre-sowing seed treatment, Albit was in the third place (3.80 tons per hectare), the fourth - Rizoagrin (3.65 tons per hectare), and the fifth - control (3.42 tons per hectare). The lowest barley yield (2.46 tons per hectare) were obtained on the background when not fertilized subsoiling tillage without the use of plant protection products. The use of seeds for incrustation, treated by Stinger chemical fungicide, increased the yield to 4.0 centner per hectare, compared with the control. When we used moldboard plowing, the yield declined in control to 4.7 centner per hectare and at fertilizered background to 4.9 centner per hectare, and at KSN soil treatment to3-5.3 centner per hectare. In arid 2010 the highest barley harvest was obtained at KSN-3 soil treating, on the second place is subsurface treatment and the third is plowing. Modern energy-saving methods of the basic soil cultivation, treating the calculated norms of fertilizers and use of plant protection products contribute to the production of planned productivity, saving fuel and lubricants, but they are unable to maintain phytosanitary conditions in barley fields within economic threshold. Taking inro account above-mentioned and the current state of agriculture in the steppe of the Volga region, it is necessary to alternate basic soil treatment methods, application of calculated norms of fertilizers and use protectants and biofungicides for pre-sowing treatment, considering fitoekzamination of seeds.

Investigation of the efficiency of a yoke joint with a flexible load-bearing element

1993 ◽  
Vol 29 (1) ◽  
pp. 7-10
Author(s):  
A. Raats ◽  
V. D. Prodan ◽  
I. G. Kalabekov
Keyword(s):  
Load Bearing ◽  
Bearing Element ◽  
Flexible Load
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