Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6403
Title: The varying densification strain in a multi-layer aluminum corrugate structure: Direct impact testing and layer-wise numerical modelling
Authors: Odacı, İsmet Kutlay
Güden, Mustafa
Kılıçaslan, Cenk
Taşdemirci, Alper
Odacı, İsmet Kutlay
Güden, Mustafa
Kılıçaslan, Cenk
Taşdemirci, Alper
Izmir Institute of Technology. Mechanical Engineering
Keywords: Aluminum
Corrugated
Densification strain
Direct impact
Impact testing
Issue Date: May-2017
Publisher: Elsevier Ltd.
Source: Odacı, İ. K., Güden, M., Kılıçaslan, C., Taşdemirci, A. (2017). The varying densification strain in a multi-layer aluminum corrugate structure: Direct impact testing and layer-wise numerical modelling. International Journal of Impact Engineering, 103, 64-75. doi:10.1016/j.ijimpeng.2016.10.014
Abstract: An aluminum (1050 H14) multi-layer corrugated structure composed of brazed 16 trapezoidal zig-zig fin layers was direct impact tested above the critical velocities for shock formation using a modified Split Hopkinson Pressure Bar. The experimentally measured stress-time histories of the cylindrical test samples in the direct impact tests were verified with the simulations implemented in the explicit finite element code of LS–DYNA. The quasi-static experimental and simulation deformation of the corrugated samples proceeded with the discrete, non-contiguous bands of crushed fin layers, while the dynamic crushing started from the proximal impact end and proceeded with a sequential and in-planar manner, showing shock type deformation characteristic. The experimental and numerical crushing stresses and the numerically determined densification strains of the fin layers increased with increasing impact velocity above the critical velocities. When the numerically determined densification strain at a specific velocity above the critical velocities was incorporated, the rigid-perfectly-plastic-locking idealized model resulted in peak stresses similar to the experimental and simulation mean crushing stresses. However, the model underestimated the experimental and simulation peak stresses below 200 m s−1. It was proposed, while the micro inertial effects were responsible for the increase of the crushing stresses at and below subcritical velocities, the shock deformation became dominant above the critical velocities.
URI: http://doi.org/10.1016/j.ijimpeng.2016.10.014
http://hdl.handle.net/11147/6403
ISSN: 0734-743X
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
6403.pdfMakale6.9 MBAdobe PDFThumbnail
View/Open
Show full item record

CORE Recommender

SCOPUSTM   
Citations

5
checked on Jul 31, 2021

WEB OF SCIENCETM
Citations

5
checked on Jul 31, 2021

Page view(s)

14
checked on Aug 4, 2021

Download(s)

16
checked on Aug 4, 2021

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.