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Theoretical–experimental study of the bending behavior of thin-walled rectangular tubes
https://orcid.org/0000-0003-4095-969X
Abstract Plastic hinges are the deformation mechanism of thin-walled tubes under bending loads. The aim of this work is to study the influence of the three ratios between the dimension parameters of the tube’s section: width-to-height, height-to-thickness and width-to-thickness, on this mechanism. Bending tests and a parametric study by numerical simulations are then carried out, using the Digital Image Correlation technique (D.I.C), to validate the F.E.M model. The results show two different deformation mechanisms: higher values of the ratios (thin-walled shapes), lead to plastic hinges as described by Kecman’s model while lower values of the ratios (thick-walled shapes) lead to different plastic hinges. Finally, an index is defined to predict the type of behavior based on the ratios.
Graphical abstract Display Omitted
Highlights Digital Image Correlation technique is applied to validate bending numerical models. Kecman’s model of bending response is not suitable for thick tubes. A F.E.M. model to predict the behavior of thick tubes is proposed and validated. Q index is defined to sort thick-walled from thin-walled tubes, establishing a limit value of Q=50.
Theoretical–experimental study of the bending behavior of thin-walled rectangular tubes
https://orcid.org/0000-0003-4095-969X
Abstract Plastic hinges are the deformation mechanism of thin-walled tubes under bending loads. The aim of this work is to study the influence of the three ratios between the dimension parameters of the tube’s section: width-to-height, height-to-thickness and width-to-thickness, on this mechanism. Bending tests and a parametric study by numerical simulations are then carried out, using the Digital Image Correlation technique (D.I.C), to validate the F.E.M model. The results show two different deformation mechanisms: higher values of the ratios (thin-walled shapes), lead to plastic hinges as described by Kecman’s model while lower values of the ratios (thick-walled shapes) lead to different plastic hinges. Finally, an index is defined to predict the type of behavior based on the ratios.
Graphical abstract Display Omitted
Highlights Digital Image Correlation technique is applied to validate bending numerical models. Kecman’s model of bending response is not suitable for thick tubes. A F.E.M. model to predict the behavior of thick tubes is proposed and validated. Q index is defined to sort thick-walled from thin-walled tubes, establishing a limit value of Q=50.
Theoretical–experimental study of the bending behavior of thin-walled rectangular tubes
https://orcid.org/0000-0003-4095-969X
Abstract Plastic hinges are the deformation mechanism of thin-walled tubes under bending loads. The aim of this work is to study the influence of the three ratios between the dimension parameters of the tube’s section: width-to-height, height-to-thickness and width-to-thickness, on this mechanism. Bending tests and a parametric study by numerical simulations are then carried out, using the Digital Image Correlation technique (D.I.C), to validate the F.E.M model. The results show two different deformation mechanisms: higher values of the ratios (thin-walled shapes), lead to plastic hinges as described by Kecman’s model while lower values of the ratios (thick-walled shapes) lead to different plastic hinges. Finally, an index is defined to predict the type of behavior based on the ratios.
Graphical abstract Display Omitted
Highlights Digital Image Correlation technique is applied to validate bending numerical models. Kecman’s model of bending response is not suitable for thick tubes. A F.E.M. model to predict the behavior of thick tubes is proposed and validated. Q index is defined to sort thick-walled from thin-walled tubes, establishing a limit value of Q=50.
Theoretical–experimental study of the bending behavior of thin-walled rectangular tubes
Rincón-Dávila, David (author) / Alcalá, Enrique (author) / Martín, Ángel (author)
Thin-Walled Structures ; 173
2022-01-28
Article (Journal)
Electronic Resource
English
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