Piezomorphic Materials

Alderson, Andrew; Alderson, K. L.; McDonald, Samuel; Mottershead, B.; Nazaré, Shonali; Withers, Philip J.; Yao, Yong

doi:10.1002/mame.201200028

Cited by 32 publications

(42 citation statements)

References 37 publications

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“…The energy absorption of functionally graded regular hexagonal honeycombs has been observed to be highly sensitive to the type of gradient topology used, especially under very high dynamic compressive loading and during the early stages of crushing [18]. Gradient and graded-type open cell foams produced and characterised by Alderson et al have shown overall unusual deformation mechanisms under tensile loading [19]. Gradient cellular tessellations with graded cell-wall aspect ratios and internal cell angles have been studied by Hou et al as potential fillers for sandwich beams subjected to three-point bending tests [20].…”

Section: Introductionmentioning

confidence: 99%

Dynamic behaviour of auxetic gradient composite hexagonal honeycombs

Boldrin

Hummel

Scarpa

et al. 2016

Composite Structures

164

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The paper describes a vibroacoustics analysis of auxetic gradient honeycomb composite structures with hexagonal configurations. We examine two classes of gradient cellular layout-one with continuously varying internal cell angle, the other with gradient cell wall aspect ratio across the surface of the honeycomb panel. The structural dynamics behaviour of the two gradient honeycomb configurations is simulated using full-scale Finite Elements and Component Mode Synthesis (CMS) substructuring. Samples of the gradient honeycombs have been manufactured by means of 3D printing techniques, and subjected to modal analysis using scanning laser vibrometry. We observe a general good comparison between the numerical and the experimental results. A numerical parametric analysis shows the effect of the gradient topology upon the average mobility and general vibroacoustics response of these particular cellular structures.

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Section: Introductionmentioning

confidence: 99%

Dynamic behaviour of auxetic gradient composite hexagonal honeycombs

Boldrin

Hummel

Scarpa

et al. 2016

Composite Structures

164

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“…It provides a way to fabricate dome-like complicated structures without the necessity of using complex techniques or additional machining. Moreover, NPR materials also exhibit variable permeability [129][130][131], shape memory [112,[132][133][134], abrasive wear resistance [135], etc.…”

Section: Other Specific Propertiesmentioning

confidence: 99%

Mechanics of Advanced Materials

Silberschmidt¹,

Матвеенко²

2015

Engineering Materials

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“…Therefore, to address the above limitations, the auxetic nanofiber materials have been introduced in the recent days. The auxetic material possesses adequate cell responsive and excellent mechanical properties such as flexibility, indentation resistance, fracture toughness, resilience, vibration control, shear resistance and deformation mechanism compared to conventional material of the same origin due to their unique structural designed patterns [1,[14][15][16][17][18]. The auxetic patterned materials have the ability to undergo wider when stretched, thinner when compressed and behave synclastically on bending [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of auxetic PCL nanofiber membranes for biomedical applications

Bhullar

Rana

Lekesiz

et al. 2017

Materials Science and Engineering: C

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The main objective of this study was to fabricate poly (ε-caprolactone) (PCL)-based auxetic nanofiber membranes and characterize them for their mechanical and physicochemical properties. As a first step, the PCL nanofibers were fabricated by electrospinning with two different thicknesses of 40μm (called PCL thin membrane) and 180μm (called PCL thick membrane). In the second step, they were tailored into auxetic patterns using femtosecond laser cut technique. The physicochemical and mechanical properties of the auxetic nanofiber membranes were studied and compared with the conventional electrospun PCL nanofibers (non-auxetic nanofiber membranes) as a control. The results showed that there were no significant changes observed among them in terms of their chemical functionality and thermal property. However, there was a notable difference observed in the mechanical properties. For instance, the thin auxetic nanofiber membrane showed the magnitude of elongation almost ten times higher than the control, which clearly demonstrates the high flexibility of auxetic nanofiber membranes. This is because that the auxetic nanofiber membranes have lesser rigidity than the control nanofibers under the same load which could be due to the rotational motion of the auxetic structures. The major finding of this study is that the auxetic PCL nanofiber membranes are highly flexible (10-fold higher elongation capacity than the conventional PCL nanofibers) and have tunable mechanical properties. Therefore, the auxetic PCL nanofiber membranes may serve as a potent material in various biomedical applications, in particular, tissue engineering where scaffolds with mechanical cues play a major role.

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Piezomorphic Materials

Cited by 32 publications

References 37 publications

Dynamic behaviour of auxetic gradient composite hexagonal honeycombs

Dynamic behaviour of auxetic gradient composite hexagonal honeycombs

Mechanics of Advanced Materials

Design and fabrication of auxetic PCL nanofiber membranes for biomedical applications

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