Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2696
Title: Development of novel multilayer materials for impact applications: A combined numerical and experimental approach
Authors: Taşdemirci, Alper
Hall, Ian W.
Taşdemirci, Alper
Keywords: High strain rate
LS-DYNA
Mechanical properties
Multilayer structures
Numerical simulation
Issue Date: May-2009
Publisher: Elsevier Ltd.
Source: Taşdemirci, A., and Hall, I.W. (2009). Development of novel multilayer materials for impact applications: A combined numerical and experimental approach. Materials and Design, 30(5), 1533-1541. doi:10.1016/j.matdes.2008.07.054
Abstract: A well-verified and validated numerical model was used to investigate stress wave propagation in a multilayer material subjected to impact loading. The baseline material consisted of a ceramic faceplate and composite backing plate separated by a rubber or teflon foam interlayer: several variants were investigated in which the number, type, and total thicknesses of the interlayers were altered. Comparison of the variants showed that the use of multiple teflon foam interlayers could drastically reduce the average stress in the multilayer material. Based on the numerical results, further experimental work was undertaken upon one of the variants. Very large and unexpected tensile stress oscillations were observed in the ceramic layers, leading to a refinement of the numerical model which successfully reproduced the oscillations and also demonstrated that separation of the sample layers led to trapping of the stress wave within the layers. Use of the validated numerical model allowed detailed analysis of the processes of wave transmission and demonstrates the important synergy that can exist between experimental and modeling studies. The current study provides a valuable starting point for designing future multilayer materials with specific, controlled properties.
URI: http://dx.doi.org/10.1016/j.matdes.2008.07.054
http://hdl.handle.net/11147/2696
ISSN: 0264-1275
0264-1275
1873-4197
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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