Effects of internal blades on energy absorption capacity by circular tubes during the flattening process

سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 362

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شناسه ملی سند علمی:

ISME24_756

تاریخ نمایه سازی: 21 مهر 1398

چکیده مقاله:

This article investigates lateral flattening process on circular metal tubes in two different conditions of simple and reinforced by internal blade by experimental method. Also, effects of some parameters such as presence of stiffener blade into the circular tube, creation of circular holes on the blade wall and their number and position, number and material type of blade, and also, point weld of blades on energy absorption behavior of the structure during the quasi-static lateral compression process are discussed. Positioning the blades as the stiffener into the circular tubes is a novel method for increasing the energy absorption capacity of the structure subjected to the lateral compression. For this purpose, a simple tube and several reinforced tubes by different patterns of blades were prepared and laterally tested. Then, experimental diagrams of load-displacement and absorbed energy-displacement of the specimens and also, specific absorbed energy by thin-walled samples were obtained. Experimental results show that in all the cases, using different patterns of blades into the circular metal tubes increases total absorbed energy capacity of the specimens. However, specific absorbed energy by a reinforced tube may enhance or reduce, depending on the pattern of the stiffener. Furthermore, experiments indicate that position of created holes on the blade wall has considerable effects on energy absorption capacity of the structure; while, point welding the internal blades and increment of number of blades have an undesirable and inverse effect on crashworthiness behavior of the tubes. Results demonstrate that a multilayered composite blade is a better choice respect to a galvanized iron blade, in viewpoint of energy absorption.

نویسندگان

Abbas Niknejad

Mechanical Engineering Department, Yasouj University, P.O. Box ۷۵۹۱۴ ۳۵۳, Yasouj, Iran

Pourya Heidari Orojloo

Mechanical Engineering Department, Yasouj University, Yasouj, Iran;

Ezzatallah Hosseinzadeh

Mechanical Engineering Department, Yasouj University, Yasouj, Iran;