Evaluation of strength of carrying metal structures of trailers

Abstract

Purpose: Development of a computational model of stress-strain state bearing elements of trailer frames for preliminary assessment and identification of areas with increased risk of failure. Design/methodology/approach: The object of the study is the processes of loading the load-bearing metal structures of trailers - fertilizer spreaders. The stress-strain state of the spreader bearing system is investigated for the established three typical cases of external load. To refine the values obtained as a result of modelling, they were determined in SOLIDWORKS. Findings: Computational models of load have been compiled by improving the method of minimum potential deformation energy for its effective correct use in analytical studies of a similar type of metal structures. It is proved that for a flat closed frame structure made of thin-walled profiles, loaded with forces perpendicular to the plane of the frame, the levelling of compression and shear energies, as well as axial and transverse forces and bending moments in the horizontal plane does not significantly affect the calculation results. Research limitations/implications: Horizontal components of the shear forces as well as the normal forces and as a consequence the corresponding potential deformation energy are neglected, which has some effect on the accuracy of the calculations. Practical implications: An effective tool for strength analysis with preliminary assessment and diagnostics of load-bearing metal structures based on the constructed calculation models of stress strain state load-bearing frames of typical geometry with an arbitrarily given distribution of external load. Originality/value: A universal algorithm for recording additive functions of bending and torques, as well as the potential deformation energy of welded frames of trailers.

Investigation of internal efforts in the components of the crop sprayer boom section

“…Thus, to solve the equations it's quite reasonable to use Leibniz rule of the integrand (function under the integral sign) differentiation (i.e. at first the partial derivatives must be taken and only after that the integration can be performed) or other approaches [16,17] which make the calculations faster and simpler. To analyze the distribution of efforts in the bearing structures of the machine it's quite reasonable to use some computational investigation based on the simulation models [18][19][20][21].…”

“…The above-mentioned approach has greatly reduced the expression length of function of potential energy of deformation and the number of mathematical operations to determine the unknown internal efforts under accessible decrease in engineering calculation accuracy conditions [12][13][14][15][16].…”

Determination of Thermomechanical Stresses in Elements of Vehicles' Braking Systems

“…All these factors promote formation of a scale or a film on surfaces with consideration of the surfaces condition, in particular coating, roughness, hardness, etc. [6][7][8][9][10][11][12][13][14][15][16]. The constant influence of these factors' combinations causes damages with subsequent destruction.…”

“…Fatigue fractures cause spontaneous failure of metal structures of vehicles' components and elements, lead to weight loss, intensify wear of joints, change the amount of surface roughness of parts, reduce fatigue strength and initiate cracks. Therefore, the reliability and durability of machines and their elements are reduced and the costs of repair and elimination of the consequences of failures are increased [16,19].…”

Improvement of prt-9 constructive system on the basis of frame elements strength balance

“…The residual operation life of the central spar is Analysis of the available investigation results. Analytical and experimental investigations of the stress-strained state (hereinafter SST) and methods for the estimation of the operation life of agricultural machinery structural systems are reflected in numerous scientific papers, particularly in paper [1]. Investigations of SST and calculation of the residual life of solid organic fertilizer sprayer are carried out in papers [2], [3].…”