Facesheet Wrinkling of Damaged Honeycomb Sandwich Structures

Wadsworth, D.J.; Horrigan, D.P.W.; Moltschaniwskyj, G.; Collins, Ian

doi:10.1177/1099636209103555

Cited by 10 publications

(10 citation statements)

References 8 publications

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“…debonding (delamination buckling) or local core crushing (crippling) [11,12]. In practice, these various failure modes do often interact.…”

mentioning

confidence: 99%

Linearized global and local buckling analysis of sandwich struts with a refined quasi-3D model

D′Ottavio¹,

Polit²

2014

Acta Mech

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“…debonding (delamination buckling) or local core crushing (crippling) [11,12]. In practice, these various failure modes do often interact.…”

mentioning

confidence: 99%

Linearized global and local buckling analysis of sandwich struts with a refined quasi-3D model

D′Ottavio¹,

Polit²

2014

Acta Mech

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“…The honeycomb plate is a typical lightweight and high-strength cushioning structure [1–4]. Thus, a great deal of research has been conducted on this structure [5–7] and its applications in engineering [8,9]. The compressive properties [10–14], energy absorption capacity [15,16], and anti-impact and anti-blast properties [17,18] of honeycomb plates are always issues of considerable interest.…”

Section: Introductionmentioning

confidence: 99%

The compressive properties and strengthening mechanism of the middle-trabecular beetle elytron plate

Chen

et al. 2018

Jnl of Sandwich Structures & Materials

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For the development of new types of lightweight sandwich structures, the compressive properties and strengthening mechanism of the middle-trabecular beetle elytron plate were investigated for various values of η (the ratio of the trabecular radius to the honeycomb wall length). The results are as follows: (1) When η = 0.1, the increases in the compressive strength and standard energy absorption capacity of the middle-trabecular beetle elytron plate compared with the honeycomb plate exceed those of the end-trabecular beetle elytron plate; with an increase to η = 0.15, the compressive strength remains nearly the same, the energy absorption capacity undergoes a significant further increase, and the trabeculae exhibit Φ-type failure. (2) The strengthening mechanism that gives rise to the compressive properties of the middle-trabecular beetle elytron plate is proposed as follows: the trabeculae are located at the center of the honeycomb walls, where the maximum deformations would otherwise occur; they constrain the deformation of the honeycomb walls; and the number of trabeculae in the middle-trabecular beetle elytron plate also exceeds that in the end-trabecular beetle elytron plate. (3) Middle-trabecular beetle elytron plates have the advantage of facile manufacturing, which will establish a basis for promoting the application of beetle elytron plates.

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“…by increasing the second moment of inertia) and providing secondary supportive roles that do not require significant load carrying capacity. These supportive roles are critical to the functionality and integrity of composite sandwich structures, and they include backing the composite sheets and preventing them from wrinkling, buckling, and bulging [7]; supporting the composite sheets against non-flexural loads (e.g. compressive loads due to impact [8] or concentrated forces); and ensuring that the two composite sheets deform simultaneously in a compatible manner.…”

Section: Introductionmentioning

confidence: 99%

“…Unsatisfying them (e.g. due to a damaged core) will compromise the functionality and structural integrity of sandwich structures [1,2,7].…”

Section: Introductionmentioning

confidence: 99%

“…subjecting sandwich structures to minor impact) can potentially damage aluminum honeycomb cores in sandwich structures without damaging the composite sheets. However, loading a composite sandwich structure with a damaged core can lead to the failure of its composite sheets, and subsequently to the failure of the whole sandwich structure [7,13,14]. Thus, detecting, assessing, and if possible repairing any damage sustained by cores in sandwich structures is critical to the integrity and durability of composite sandwich structures and applications utilizing them as load carrying members.…”

Section: Introductionmentioning

confidence: 99%

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In-plane elastic wave propagation in aluminum honeycomb cores fabricated by bonding corrugated sheets

Ahmed

Alkhader

Abu-Nabah

2017

Jnl of Sandwich Structures & Materials

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Aluminum honeycomb cores are widely used in sandwich structures due to their high stiffness-to-weight ratios and very low densities. However, owing to their porous architecture, honeycomb cores are inherently week and are susceptible to damage due to inadvertent or improper loadings on their encompassing sandwich structure. This damage can potentially lead to the failure of the sandwich structure, and therefore it should be detected and evaluated, preferably using nondestructive methods. Common nondestructive techniques have limited effectiveness in inspecting aluminum honeycombs due to their porous structure and dispersive properties. Since honeycombs are less dispersive at sub-ultrasound frequencies, inspecting them using low and sub-ultrasound frequencies has been introduced lately as a promising alternative to ultrasound inspection. However, this approach requires a priori knowledge of the wave propagation characteristics in the inspected material, which is not readily available for most commercially available aluminum honeycombs, especially the ones manufactured by joining thin corrugated sheets. Thus, this work utilizes finite element computations to assess the low frequency wave propagation characteristics (i.e. phase velocity and dispersive properties) in commercially available aluminum honeycombs made by bonding thin corrugated sheets. Results illustrate that the dispersive behavior and acoustic anisotropy of the studied honeycombs are more significant at higher porosities and high frequencies as well as identify the frequencies below which honeycombs exhibit their least dispersive acoustic behavior.

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Facesheet Wrinkling of Damaged Honeycomb Sandwich Structures

Cited by 10 publications

References 8 publications

Linearized global and local buckling analysis of sandwich struts with a refined quasi-3D model

Linearized global and local buckling analysis of sandwich struts with a refined quasi-3D model

The compressive properties and strengthening mechanism of the middle-trabecular beetle elytron plate

In-plane elastic wave propagation in aluminum honeycomb cores fabricated by bonding corrugated sheets

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