Application of DIC technique for monitoring of deformation process of SPR hybrid joints

• Autorzy: Sadowski T. , Kneć M.

Warianty tytułu

PL

Zastosowanie techniki DIC do obserwacji procesu deformacji hybrydowych połączeń typu SPR

• Języki publikacji: EN

Abstrakty

EN

Digital Image Correlation (DIC) technique gives possibility to observe deformation process in many applications including self-piercing riveting (SPR) hybrid joint. The hybrid SPR joint consists of simple SPR joint made of two adherends, steel tubular rivet (total length of 5 mm) and an adhesive. The adhesive was applied before piercing process. For specimen preparation two different aluminum alloys were used: 2024 and 5005 (2mm thickness both) with tensile strength 400 and 160MPa, respectively. For better understanding of joint forming process and to allow DIC strains observation during the joint creation, a special holder was designed with precisely polished die. The tests were performed by application of the 100kN servo-hydraulic machine, which recorded time, load, displacement and was synchronized with the DIC system. The joint forming process was carried out with 2 mm/min constant speed. During piercing process rivet and upper surface of the adherend were observed and the major strain states were estimated. The uniaxial tensile tests of single lap joints (SLJ) up to the final failure were performed and the displacements and the strains were recorded. In particular the rivet deformation was observed also during the whole loading process. The hybrid SPR joints are very effective, because the load capacity and energy absorption increase more than 1.5 times in comparison to the simple SPR joints.

PL

Technika Cyfrowej Korelacji obrazu (DIC) pozwala na obserwacje procesów deformacji w róznych aplikacjach - w tym dla hybrydowych połączeń typu SPR (przebijanych za pomocą nita). Hybrydowe połaczenie typu SPR składa sie ze standardowego połączenia SPR - próbka jednozakładowa przebitą stalowym nitem pół-rurkowym (długosc całkowita 5 mm) oraz warstwy kleju pomiędzy zakładkami naniesionego przed procesem przebijania. Do stworzenia próbek zostały użyte dwa typu aluminium o różnej plastyczności 2024 i 5005 o grubości 2 mm każdy i wytrzymałości odpowiednio 400MPa i 160 MPa. W celu pełniejszego zrozumienia procesu formowania sie złacza został zaprojektowany specjalny uchwyt z precyzyjnie wyszlifowana matryca. Badania zostały przeprowadzone przy pomocy maszyny osiowej o zakresie 100kN, zsynchronizowana z systemem DIC. Proces tworzenia sie złącza był prowadzony ze stałą prędkością 2 mm/min. Podczas procesu tworzenia złącza obserwowano nit oraz górną powierzchnię łączonych blach i główne odkształcenia zostały wyznaczone. Badania przeprowadzono na próbkach zakładkowych do ich zniszczenia rejestrujac przemieszczenia i odkształcenia. W szczególnosci obserwowano deformacje nita w całym procesie deformacji. Hybrydowe połączenia typu SPR sa bardzo efektywne, ponieważ uzyskuje się wzrost siły przenoszonej przez połączenie i energii absorbowanej ponad 1.5 raza większych w porównaniu do prostego złącza typu SPR.

Słowa kluczowe

EN

DIC; SPR; joining process; hybrid joint

PL

DIC; SPR; proces łączenia; połączenia hybrydowe

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2013
• Tom: Vol. 58, iss. 1
• Strony: 119--125
• Opis fizyczny: Bibliogr. 39 poz., rys., tab.

Twórcy

autor

Sadowski T.

autor

Kneć M.

• Lublin University of Technology, 20-618 Lublin, 40 Nadbystrzycka Str., Poland

Bibliografia

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