Single- and double-layer aluminum corrugated core sandwiches under quasi-static and dynamic loadings

Kılıçaslan, Cenk; Odacı, İsmet Kutlay; Güden, Mustafa

doi:10.1177/1099636215603692

Cited by 25 publications

(11 citation statements)

References 31 publications

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“…Several innovative designs of corrugated structures have been proposed in the past few years expanding their range of potential applications. Examples of novel core designs are integrated woven corrugated cores, hierarchical corrugated cores, zig‐zag trapezoidal corrugated core, two way corrugated cores, bi‐corrugated plate cores, and bi‐directional corrugated‐strip‐cores . The categorization of corrugated structures is summarized in Figure , and is discussed in detail in the following sections.…”

Section: Corrugated Coresmentioning

confidence: 99%

Sandwich Structures with Prismatic and Foam Cores: A Review

Xiong

Mousanezhad³

et al. 2018

Adv Eng Mater

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This article provides a comprehensive review of recent research efforts on the development and characterization of sandwich structures with corrugated, honeycomb, and foam cores. The topics discussed in this review article include aspects of core-face bonding and reinforcement, enhancement of core mechanical properties and panel performance (including the role of structural hierarchy), and multifunctional advantages offered by different core constructions. In addition, the review discusses potential applications, including in morphing wing design, impact resistance, and ultralightweight applications. Future research directions are discussed.

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Section: Corrugated Coresmentioning

confidence: 99%

Sandwich Structures with Prismatic and Foam Cores: A Review

Xiong

Mousanezhad³

et al. 2018

Adv Eng Mater

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“…It was shown that foam filling affected the buckling mode of core. Few studies on the modelling static and dynamic deformation of corrugated sandwiches with single and double‐layer have also been published, such as refs . Nevertheless, the effect of imperfections particularly on the shock mode of deformation multilayer corrugated structures at increasing impact velocities has not been fully explored.…”

Section: Introductionmentioning

confidence: 99%

Impact loading and modelling a multilayer aluminium corrugated/fin core: The effect of the insertion of imperfect fin layers

Sarıkaya

Taşdemirci

Güden

2019

Strain

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The quasi‐static compression (0.0048 m/s) and Taylor‐like impact (135, 150, and 200 m/s) loading of a multilayer 1050 H14 aluminium corrugated core were investigated both experimentally and numerically in LS‐DYNA using the perfect and imperfect sample models. In the imperfect sample models, one or two layers of corrugated fin structure were replaced by the fin layers made of bent‐type cell walls. The localised deformation in the quasi‐static imperfect models of cylindrical sample started at the imperfect layers, the same as the tests, and the layers were compressed until about the densification strain in a step‐wise fashion. The localised deformation in the perfect models, however, started at the layers at and near the top and bottom of the test sample. In the shock mode, the sample crushed sequentially starting at the impact end layer regardless the perfect or imperfect sample models were used. Furthermore, the perfect and imperfect models resulted in nearly the same initial crushing stresses in the shock mode. The layer strain histories revealed a velocity‐dependent layer densification strain. Both model types, the imperfect and perfect, well approximated the stress‐time histories and layer deformations of the shock mode. The rigid perfectly plastic locking model based on the numerically determined densification strains also showed well agreements with the experimental and numerical plateau stresses of the shock mode.

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“…A corrugated core offers a variety of benefits, including ease of manufacturing, heat dissipation, high structural performance, and the capability of resistance to bending and twisting, in addition to vertical shear. In this regard, in order to characterize different features of structural performance of this type of sandwich structures, a considerable number of studies have been carried out, including bending behavior [18–23], out-of-plane compression [24–27], and impact response [28–31]. Due to the mechanical performance superiority of filled corrugated core sandwiches over the traditional sandwich structures with empty corrugated core, several relevant investigations have been conducted recently.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of sandwich structures with balsa core and hybrid corrugated composite/balsa core under three-point bending using digital image correlation

Sayahlatifi

Rahimi

Bokaei

2019

Jnl of Sandwich Structures & Materials

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Sandwich structures are commonly used in automotive, aerospace, and civil infrastructure applications due to their high strength-to-weight and stiffness-to-weight ratios. In the present work, the performance of sandwich structures with aluminum facings and two different types of core, including balsa wood core and hybrid corrugated composite/balsa core subjected to three-point bending, is investigated, both experimentally and numerically. The face sheets are 6061-T6 aluminum alloy and the hybrid core has been made of balsa wood with average density of 125 kg m−3 and E-glass woven fabric, bonded together using epoxy resin. For data acquisition during the tests, a linear variable differential transformer has been placed under the mid-span of the specimens and a digital image correlation technique has been used for monitoring the full-field strain distributions and deflection pattern as well. Continuum damage mechanics has been employed for the finite element model analysis of the three-point bending tests. In order to predict the maximum load-bearing capacity and failure modes, a wood material behavior model for balsa and a combination of Hashin and Puck failure criterion for corrugated composite were imported into ABAQUS/Explicit via VUMAT subroutines. It was found that combining balsa core with corrugated composite results in prevention of catastrophic failure and consequently gradual decrease of load-bearing capacity. Furthermore, the results demonstrate that the hybrid core increases the strength-to-mass density and stiffness-to-mass density ratios by 34.7% and 28.2%, respectively. Numerical findings have been successfully compared to experimental data, which reveals its suitability for parametric analysis of the proposed hybrid core sandwich structure.

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Single- and double-layer aluminum corrugated core sandwiches under quasi-static and dynamic loadings

Cited by 25 publications

References 31 publications

Sandwich Structures with Prismatic and Foam Cores: A Review

Sandwich Structures with Prismatic and Foam Cores: A Review

Impact loading and modelling a multilayer aluminium corrugated/fin core: The effect of the insertion of imperfect fin layers

Experimental and numerical investigation of sandwich structures with balsa core and hybrid corrugated composite/balsa core under three-point bending using digital image correlation

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