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The study of stress-strain state elements of the truck semi-trailer body bottom

Lyashuk Oleg, Levkovych Mykhailo, Vovk Yuriy, Gevko Ivan, Stashkiv Mykola, Liubomyr Slobodian, Pyndus Yuriy

Zeszyty Naukowe. Transport / Politechnika Śląska

2023

z. 118

161--172

Research on the influence of geometric parameters of body bottom elements on the stress-strain state (SSS) of the truck with the general application of computer simulation methods was conducted. The nature of the change in static stress and displacement depending on the change in the proportions of the crosssection of the channel at fixed geometric dimensions of the workpiece and the thickness of the workpiece and the bottom material of the body has been studied. Analytical, numerical and experimental methods were used in the study of the stress-strain state of the metal structure of car bodies. Its weight minimization is an important aspect of a truck body design. Because an excess weight leads to increased production costs, reduced payload and reduced fuel efficiency. According to the concept of weight reduction with the provision of a given strength, the body model with variable parameters of the bottom elements is modelled and analyzed. CAD - body models and analysis of the stress-strain state of the channels of the bottom of the bodies have been performed using the software package SolidWorks.

Experimental-numerical analysis of the fracture process in smooth and notched V specimens

Świt Grzegorz, Dzioba Ihor, Ulewicz Małgorzata, Lipiec Sebastian, Adamczak-Bugno Anna, Krampikowska Aleksandra

Production Engineering Archives

2023

Vol. 29, Iss. 4

444-451

This paper presents the outcomes of quality tests conducted on specimens, both smooth and V-notched, subjected to uniaxial tension, which were extracted from a gas transport pipeline. The introduction of the V-notch introduced variations in the stress and strain component fields near the plane of maximum constriction, consequently leading to their failure through different mechanisms. The process included the implementation of quality management practices such as numerical modeling and simulation of the loading of the specimens using ABAQUS. The material model employed in these calculations was defined and verified to ensure quality control. Subsequent to the numerical calculations, maps of the stress and strain component fields were generated, contributing to the quality assessment of the specimens. It was determined that the quality management process for the smooth specimen identifies the initiation of failure primarily due to the normal stress component in the central region of the plane with the largest constriction. In contrast, in the V-notched specimen, quality management efforts revealed that failure initiation occurs due to the tangential stress component, and failure proceeds through the shear mechanism. These results are valuable in developing a quality-driven methodology for monitoring the operational safety of gas network pipelines, primarily based on the analysis of acoustic emission signals.

Średnia wartość naprężenia stycznego i szybkości ścinanie na powierzchni pęcherza gazowego przepływającego w cieczach nienewtonowskich

Dziubiński M., Orczykowska M., Budzyński P.

Inżynieria Chemiczna i Procesowa

2002

T. 23, z. 3

341-348

Przedstawiono próbę oszacowania średniej wartości naprężenia stycznego i szybkości ścinania na powierzchni pęcherza gazowego przepływającego ruchem laminarnym w cieczach nienewtonowskich. Zagadnienie to rozwiązano dla pęcherzy kulistych oraz dla pęcherzy o kształtach zbliżonych do kulistego przez zaadoptowanie metody Cho, opracowanej pierwotnie do określania szybkości ścinania i naprężenia stycznego podczas opadania kulek w cieczach nienewtonowskich.

The first attempt to calculate the average value of shear stress and shear rate at the surface of gas bubble rising in non-Newtonian liquids is presented. On the basis of Cho method this subject has been developed for spherical and near spherical shapes of gas bubbles. The method of Cho originally describes the average shear rate and shear stress at the surface of a sphere rising in non-Newtonian liquids.