FE simulation of plastic collapse and geometrical factors affecting the bending response of a tubular aluminum beam

Seçil Ekşi; Kenan Genel

doi:10.3139/120.111106

Article

FE simulation of plastic collapse and geometrical factors affecting the bending response of a tubular aluminum beam

Seçil Ekşi and Kenan Genel

Published/Copyright: November 21, 2017

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From the journal Materials Testing Volume 59 Issue 11-12

Abstract

In this study, bending response of circular aluminum tube and factors affecting collapse behaviour were investigated by FE simulations. Geometrical parameters such as wall tube thickness, tube diameter, support distances, punch diameter and material properties were considered in analyses systematically. The results of analyses revealed that local buckling plays an important role on collapse load and buckling displacement is directly proportional to tube diameter, regardless of D/t and yield strength of tube material. The ratio of buckling displacement to tube diameter corresponds to 40 % of tube diameter. Moreover, an attempt was made to construct an equation as a function of D, t and yield strength for estimating collapse load. Finally, ANOVA test was used to analyze the influence of some parameters such as diameter of tube, wall thickness and yield strength. It is found from the test that the most significant factor on maximum load is wall thickness (79.6 %).

Kurzfassung

In der diesem Beitrag zugrunde liegenden Studie wurden mittels FE-Simulation die Biegeantwort eines kreisrunden Aluminiumrohres und die Faktoren untersucht, die das Versagensverhalten beeinflussen. Geometrische Parameter, wie die Wanddicke, der Rohrdurchmesser, die Unterstützungsabstände und der Stempeldurchmesser sowie die Materialeigenschaften wurden systematisch in den Analysen berücksichtigt. Die Resultate der Analysen ergaben, dass die lokale Krümmung einen wichtigen Einfluss auf die Versagenslast hat und dass die Verschiebung unter Krümmung direkt proportional zum Rohrdurchmesser ist, und zwar unabhängig vom Verhältnis D/t und der Dehngrenze des Werkstoffes. Das Verhältnis der Verschiebung bei Krümmung zum Rohrdurchmesser entspricht 40 % des Rohrdurchmessers. Darüber hinaus wurde ein Versuch unternommen eine Gleichung als Funktion von D, t und der Dehngrenze aufzustellen, um die Versagenslast abzuschätzen. Schließlich wurde ein ANOVA-Test durchgeführt, um den Einfluss einiger Parameter, wie dem Rohrdurchmesser, der Wanddicke und der Dehngrenze zu analysieren. Anhand der Ergebnisse zeigte sich, dass der signifikanteste Faktor für die maximale Last die Wanddicke ist (79.6 %).

*Correspondence Address, Assistant Prof. Dr. Seçil Ekşi, Mechanical Engineering Department, Sakarya University, Esentepe Campus, 54187 Sakarya, Turkey, E-mail: eksi@sakarya.edu.tr

Assistant Prof. Dr. Seçil Ekşi is working in the Department of Mechanical Engineering, Engineering Faculty, Sakarya University, Sakarya, Turkey. She received her BSc and MS degrees in Mechanical Engineering from Sakarya University in 2004 and 2006, respectively, and a PhD degree in Mechanical Engineering from the same university in 2014. Her research interests include materials, mechanical behavior of materials, manufacturing and finite element method.

Prof. Dr. Kenan Genel is Professor in the Department of Mechanical Engineering, Engineering Faculty, Sakarya University, Sakarya, Turkey. He received his BSc and MSc degrees in Mechanical Engineering from İstanbul Technical University, İstanbul, Turkey, in 1990 and 1993, respectively, and a PhD degree in Mechanical Engineering from the same university in 2000. His research interests include materials, mechanical behavior of materials, material selection, surface coating and fatigue.

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Published Online: 2017-11-21

Published in Print: 2017-11-15

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https://doi.org/10.3139/120.111106