The influence of the accuracy of reproducing the uniaxial tensile test of mild steel in the H-M plasticity model on the behaviour of a perforated thin walled shell subjected to compression

• Autorzy: Piotrowski Andrzej , Gajewski Marcin , Jemioło Stanisław , Ajdukiewicz Cezary

Identyfikatory

DOI

10.24425/ace.2025.154117

Warianty tytułu

PL

Wpływ dokładności odwzorowania jednoosiowej próby rozciągania stali miękkiej w modelu plastyczności H-M na zachowanie perforowanej cienkościennej powłoki poddanej ściskaniu

• Języki publikacji: EN

Abstrakty

EN

The article describes the impact of modeling the plasticity constitutive relationship on the buckling of a short section of a perforated thin-walled steel bar with an open cross-section (modeled as a perforated shell) subjected to compression, being one of the elements of a high-storage system. Numerical calculations were performed in the ABAQUS/Standard program with application of the elasto-plasticity theory of large deformations with additive decomposition of the logarithmic strain tensor and taking into account the nonlinear isotropic or kinematic strain hardening models. The isotropic nature of the material was considered and the plastic flow law associated with the Huber-Mises plasticity condition was assumed. In the elasticity range, linear characteristics of the material was assumed, while in the plasticity range, the shape of the uniaxial strain hardening curve was described as piecewise linear approximation of plastic strain-stress graphs obtained from uniaxial tensile tests. The 24 sets of material data obtained on the basis of experimental tests were analyzed and the influence of differences in the values of material parameters were described (in tests carried out on samples cut from the modeled bars, large differences were found in the values of material parameters and the shape of uniaxial tension graphs). Also the accuracy of strain hardening modeling (the number of sections assumed in the model piecewise linear) on the calculated bearing capacity force value was considered and evaluated.

PL

W artykule opisano wpływ modelowania relacji konstytutywnej plastyczności na wyboczenie poddanego ściskaniu krótkiego odcinka stalowego perforowanego pręta cienkościennego o przekroju otwartym (modelowanego jako perforowana powłoka) stanowiącego jeden z elementów systemu regałów wysokiego składowania. Wykonano obliczenia numeryczne w programie ABAQUS/Standard i wykorzystano zaimplementowaną w nim teorię sprężysto-plastyczności dużych deformacji z addytywną dekompozycją logarytmicznego tensora odkształcenia i nieliniowym wzmocnieniem izotropowym lub kinematycznym. Założono izotropowość materiału i przyjęto prawo płynięcia stowarzyszone z warunkiem plastyczności Hubera-Misesa. W zakresie sprężystym przyjęto liniową charakterystykę materiału, natomiast w zakresie plastycznym przebieg jednoosiowej krzywej wzmocnienia opisano odcinkowo na podstawie wykresów odkształcenie plastyczne – naprężenie otrzymanych z jednoosiowych prób rozciągania. Przeanalizowano 24 zestawy danych materiałowych otrzymanych na podstawie badań doświadczalnych i opisano wpływ różnic w wartościach stałych materiałowych (w testach przeprowadzonych na próbkach wyciętych z modelowanych prętów stwierdzono duże różnice w wartościach stałych materiałowych i charakterze wykresów rozciągania) oraz dokładności modelowania wzmocnienia (przyjętej liczbie odcinków w modelu odcinkowo liniowym) na obliczaną wartość nośności.

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2025
• Tom: Vol. 71, nr 2
• Strony: 209--224
• Opis fizyczny: Bibliogr. 37 poz., il., tab.

Twórcy

autor

Piotrowski Andrzej

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

• https://orcid.org/0000-0003-4407-7344

autor

Gajewski Marcin

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

• https://orcid.org/0000-0002-3171-8504

autor

Jemioło Stanisław

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

• https://orcid.org/0000-0001-5285-7776

autor

Ajdukiewicz Cezary

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

• https://orcid.org/0000-0003-2315-796X

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