Numerical model of cold deformation of TRIP steel

• Autorzy: Rauch Ł. , Skóra M. , Bzowski K. , Pietrzyk M.

Warianty tytułu

PL

Numeryczny model odkształcenia na zimno stali TRIP

• Języki publikacji: EN

Abstrakty

EN

Exploring possibilities of modelling deformation of TRIP steel during manufacturing of fasteners was the objective of the paper. Homogenised flow stress model for the investigated steels was determined first on the basis of compression tests. Inverse analysis was applied to eliminate the effect of friction and deformation heating in compression. Possibility of prediction of local strains and stresses accounting for the TRIP effect was investigated next. Representative Volume Element (RVE) and Statistically Similar Representative Volume Element (SSRVE) with TRIP microstructures were developed and subjected to deformation. Transformation of the retained austenite into martensite was simulated. Computing costs of the RVE and SSRVE were compared and it was shown that they are an order of the magnitude lower for the latter. The SSRVE based micro model, which can be attached to the FE code which simulates forging of fasteners, is the main output of the paper.

Głównym celem artykułu było zbadanie możliwości modelowania odkształcenia stali TRIP w procesie wytwarzania elementów złącznych. W pierwszej kolejności wyznaczono zhomogenizowane naprężenie uplastyczniające badanych stali wykorzystując wyniki prób ściskania. W celu wyeliminowania wpływu tarcia i zamiany pracy odkształcenia na ciepło zastosowano analizę odwrotną. W drugiej części pracy badano możliwości przewidywania lokalnych odkształceń i naprężeń z uwzględnieniem efektu TRIP w stali. Skonstruowano reprezentatywny element objętości (REO) i statystycznie podobny reprezentatywny element objętości (SPREO) z mikrostrukturą TR[P. Te elementy zostały poddane odkształceniom w temperaturze otoczenia. W trakcie odkształcenia modelowano przemianę austenitu szczątkowego w martenzyt. Porównano koszty obliczeń dla REO i SPREO i wykazano, że dla SPREO są one o rząd wielkości mniejsze. SPREO z mikrostrukturą TRIP, który może zostać zaimplementowany w modelu MES symulującym kucie elementów złącznych, jest głównym wynikiem pracy.

Słowa kluczowe

EN

plastic deformation; fasteners; TRIP effect; material model; Representative Volume Element

• Wydawca: Wydawnictwa AGH
• Czasopismo: Computer Methods in Materials Science
• Rocznik: 2017
• Tom: Vol. 17, No. 4
• Strony: 205--215
• Opis fizyczny: Bibliogr. 23 poz., rys.

Twórcy

autor

Rauch Ł.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Skóra M.

• GAWEL Zakład Produkcji Śrub S.A., 36-073 Strażów, Poland

autor

Bzowski K.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Pietrzyk M.

• AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).