Low velocity impact and quasi-static in-plane loading on a graded honeycomb structure; experimental, analytical and numerical study

Galehdari, S.A.; Kadkhodayan, Mehran; Hadidi-Moud, Saeid

doi:10.1016/j.ast.2015.10.010

Cited by 52 publications

(18 citation statements)

References 25 publications

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“…A maximum of 81impacts was found to produce the same damage at an impact energy of 3 Joules 23 . Galehdari et al experimentally, analytically and numerically analyzed static and low velocity impact behaviors of reinforced honeycomb sandwich composites and showed that damage was usually observed in the shape of a "V"; their analysis results were in accordance with experimental results 24 . Baba experimentally investigated low velocity impact behaviors of curved sandwich composites with a foam core and revealed that curved sandwich composites were stronger than flat sandwich composites under low velocity impact loading 25 .…”

Section: Introductionmentioning

confidence: 68%

The Flexural Fatigue Behavior of Honeycomb Sandwich Composites Following Low-Velocity Impacts

Solmaz¹,

Topkaya

2020

Preprint

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This study experimentally investigated the flexural fatigue behaviors of honeycomb sandwich composites subjected to low velocity impact damage by considering the type and thickness of the face sheet material, the cell size and the core height parameters. First, the static strength of undamaged specimens was determined by three-point bending loads, and calculating their fatigue lives; secondly, the fatigue lives of the specimens damaged by low velocity impact tests were then determined. Increasing the face sheet thickness and core height increased the flexural strength, while increasing the cell size decreased the flexural strength. Low velocity impact damage decreased the flexural strength and fatigue lives but increased the damping ratio for all specimens.

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Section: Introductionmentioning

confidence: 68%

The Flexural Fatigue Behavior of Honeycomb Sandwich Composites Following Low-Velocity Impacts

Solmaz¹,

Topkaya

2020

Preprint

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“…To obtain this load, the plateau stress of the cell is multiplied by the area affected by the load. The plateau stress equation for the power hardening material model is demonstrated as [40].…”

Section: Analysis Of Plastic Hinge Formingmentioning

confidence: 99%

Collapse of honeycomb cell as a result of buckling or plastic hinges, analytical, numerical and experimental study

Galehdari

Kadkhodayan

2019

J Braz. Soc. Mech. Sci. Eng.

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The honeycomb structure collapse during energy absorption and deformation is considered as one of the important subjects for researchers. In this paper, a combined analytical, numerical and experimental analysis on the collapse load of hexagonal aluminum honeycombs due to buckling or plastic collapse of the unit cells under flatwise compressive loading is performed. To analyze the collapse load, some analytical equations are derived for buckling and forming plastic hinges using the frame element. The amounts of these loads are measured for a single-row aluminum honeycomb structure, and the smallest one is selected as collapse load. The results show that the main cause of structure collapse is the formation of plastic hinges. To evaluate the analytical results and to propose a valid numerical simulation method, the quasi-static pressure test is performed. Furthermore, the structure collapse is also simulated by Abaqus software. The maximum difference between the numerical and experimental collapse load is 2.5%. Moreover, the deformed shape of the structure is very similar to the experimental one. The numerical simulation method and the proposed analytical relations can be used to analyze the collapse in other metal honeycomb structures.

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“…In this study, the effects of lattice web thickness, lattice web spacing and foam density on initial stiffness, deformability and energy absorbing capacity were investigated. Galehdari et al. (2015), investigated Low velocity impact and quasi-static in-plane loading on a graded honeycomb structure in an experimental, analytical and numerical study.…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior of sandwich panels with hybrid face sheets and embedded super-elastic SMA wires under quasi-static loading: An experimental investigation

Moghaddam

Tooski

Jabbari

et al. 2020

International Journal of Damage Mechanics

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In this paper the experimental behavior of sandwich panels with hybrid composite face sheets and SMA wires under quasi-static loading test was investigated. The square-shaped sandwich panel was composed of a foam core and hybrid composite face sheets consisted of carbon-epoxy and glass-epoxy laminates, in which pre-strained super-elastic SMA wires were placed between the laminates. Sandwich panels had three types of layouts, with symmetric and asymmetric face sheets and with or without the SMA wires between the layers of the faces of the panel. The panels were subjected to quasi-static loading using the Universal testing machine Zwick 250H. The response of quasi-static loading was presented as force-displacement diagrams for sandwich panels. Moreover, the damage morphology of panels after quasi-static loading test was presented by scanning electron microscope (SEM) and the damaged surfaces of the panels were estimated by active infrared thermography of the damage surface. Through comparing the damage level on the sandwich panels, the effect of the presence of the SMA wires, as well as the symmetry or asymmetry of the panel surfaces in reinforcing the structure and reducing the level of damage caused by quasi-static loading were investigated. The comparison of the behavior of the panels under the quasi-static loading test indicated that the use of SMA wires in the front face and the asymmetry of the surfaces were more effective and reinforced by applying more carbon layers in the back face to increase panel resistance.

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Low velocity impact and quasi-static in-plane loading on a graded honeycomb structure; experimental, analytical and numerical study

Cited by 52 publications

References 25 publications

The Flexural Fatigue Behavior of Honeycomb Sandwich Composites Following Low-Velocity Impacts

The Flexural Fatigue Behavior of Honeycomb Sandwich Composites Following Low-Velocity Impacts

Collapse of honeycomb cell as a result of buckling or plastic hinges, analytical, numerical and experimental study

Mechanical behavior of sandwich panels with hybrid face sheets and embedded super-elastic SMA wires under quasi-static loading: An experimental investigation

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