INVESTIGATION OF THE STRESS-STRAIN STATE OF A TRUCK SEMI-TRAILER BODY BOTTOM
10.33815/2313-4763.2021.1.24.093–103
Abstract
The article contains new high-performance truck designs best suited for the transportation of certain goods types and for specific operating conditions. The article is devoted to the improvement of the designing technology of load-bearing structures of truck bodies. A review and analysis of the current state of the theory of mathematical programming and optimal design have been carried out. A numerical procedure for optimizing the load-bearing structures of truck bodies has been proposed. The influence of the truck body bottom elements geometric parameters on its stress-strain state (SSS) has been investigated with the general application of computer modeling methods. The research was carried out by the module Simulation engineering analysis tools of the specialized software SolidWorks on the developed CAD - model of the truck semi - trailer body. The analysis of a change of the stress-strain state parameters at a change of body bottom elements geometrical parameters has been conducted. The nature of static stress and displacement change depending on a change of channel cross section proportions at the fixed geometrical sizes and thickness of a blank and material of a body bottom has been investigated. On the basis of the research results, the graphical dependences of the static stress change, displacement and safety factor (FOS) on the shelf width and channel thickness, as well as the dependence of static stresses in the channel on the channel wall thickness and body bottom sheet thickness are being constructed. An equation that describes the nature of the static stress change in the channels of the body semi-trailer bottom has been obtained. The results of research on improving the design of the truck body provide the basis for engineering solutions to improve the design of the semi-trailer body bottom, which allows to maximize load capacity and improve strength, reduce weight and extend service life, and maintain the technical resource.
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