Bi-axial stress state hot bulging behavior and plane-stress visco-plastic material modelling of TA32 sheets

• Autorzy: Peng Heli , Luo Zhiqiang , Qu Shuguang , Shi Wenzhan , Fu Kunning , Xiao Wenchao , Zheng Kailun

Identyfikatory

DOI

10.1007/s43452-023-00707-6

• Języki publikacji: EN

Abstrakty

EN

Bi-axial state is the dominant stress state experienced by the sheet metal during various forming processes, which requires a thorough understanding and modelling for process designs. In this paper, effects of equal bi-axial stress-state on the hot deformation behavior of titanium alloys are thoroughly investigated using hot bulging tests, and is further compared to the uniaxial stress state. Firstly, a specific hot bulging test device enabling a uniform temperature field and constant control of strain rate was established, using which, systematic hot bulging tests at various temperatures (750–850 °C) and strain rates (0.001–0.1 s−1) of the near-alpha phase TA32 sheets were conducted to determine the hot equal bi-axial bulging behavior. Based on the testing data of force and geometry variations of bulged domes, the equivalent stress–strain curves were calculated. Secondly, a plane-stress visco-plastic plane-stress model of near-alpha TA32 sheets was developed for the first time, enabling both the uniaxial and biaxial flow behavior and forming limits to be precisely predicted. The prediction accuracies for uniaxial and biaxial cases are 93.5% and 89%, respectively. In the end, the uniform deformation resulting from the strain and strain rate hardening was determined, which contributes to the understanding of the stress-state effect on hardening preliminarily. The plane stress visco-plastic model provides an efficient and reliable material model for finite element (FE) simulations of hot forming titanium alloy sheets.

Słowa kluczowe

EN

TA32 titanium alloy sheets; hot forming; bulging test; material model; material stress-strain

PL

stop tytanu; formowanie na gorąco; naprężenie materiału; odkształcenie materiału

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 3
• Strony: art. no e167, 2023
• Opis fizyczny: Bibliogr. 30 poz., fot., rys., wykr.

Twórcy

autor

Peng Heli

• Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China

autor

Luo Zhiqiang

• Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China

autor

Qu Shuguang

• School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China

autor

Shi Wenzhan

• Shanghai Spaceflight Precision Machinery Institute, Shanghai 201600, China

autor

Fu Kunning

• School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 15001, China

autor

Xiao Wenchao

• Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen 518000, China

autor

Zheng Kailun

• School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)