Experimental and numerical analyses on crushing behaviour of drawn cups of laser welded tailored blanks under axial loading

• Autorzy: Katiyar Bhupesh Singh , Panda Sushanta Kumar , Saha Partha

Identyfikatory

DOI

10.1007/s43452-022-00537-y

• Języki publikacji: EN

Abstrakty

EN

It is imperative to characterize the crushing behaviour of deep drawn components of tailor welded blanks for their wide applications in different autobody structures. In the present work, extra deep drawing steel sheets were laser welded to produce welded blanks of similar thickness and dissimilar thickness (LWTBs), and these were deformed using a two stage deep drawing setup to fabricate geometrically similar drawn cups consisting of both hemispherical and cylindrical segments. Subsequently, these drawn cups were axially crushed between two flat platens to study collapse modes, load–displacement responses and energy absorption capabilities. The collapse of the drawn cups was found to onset with an inward dimpling of the hemispherical segment. As deformation progressed, the folding of cylindrical section occurred either axisymmetrically or unevenly based on the extent of non-uniform thickness variations across the weld zone (WZ). It was also found that the load–displacement response and energy absorption of the cups were enhanced because of the presence of WZ and thickness difference in LWTBs. Also, finite element-based numerical models were developed to collate the prediction capabilities of three different anisotropic material models viz. Hill48, YLD89, and Stoughton non-associated flow rule (S-NAFR)-based model. All these material models were successfully calibrated to predict the collapse modes, but the S-NAFR model was found to closely predict the load–displacement curves and energy absorption. Furthermore, the assessment of specific energy absorption and crushing force efficiency suggested that lightweight LWTB components can be fabricated with improved crashworthiness performance using sheet materials of different thickness.

Słowa kluczowe

EN

tailor welded blanks; crushing; FE modelling; non-associated flow rule

PL

półfabrykat; kruszenie; modelowanie MES; przepływ

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2022
• Tom: Vol. 22, no. 4
• Strony: art. no. e211, 2022
• Opis fizyczny: Bibliogr. 46 poz., rys., wykr.

Twórcy

autor

Katiyar Bhupesh Singh

• Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India

autor

Panda Sushanta Kumar

• Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India

autor

Saha Partha

• Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)