Fatigue Life of Auxetic Re-entrant Honeycomb Structure

Michalski, J.; Stręk, Tomasz

doi:10.1007/978-3-030-16943-5_5

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…For the fatigue life studies of the structures, the reentrant honeycomb unit cells exhibited a better fatigue life over hexagonal honeycomb unit cells. This observation might serve as an indication of better fatigue properties in auxetic structures over normal materials in general [156]. Through a computationally assisted design and analysis, adaptive curvature auxetic structures were realized [157].…”

Section: Common Auxetic Structures and Their Prominent Characteristicsmentioning

confidence: 90%

On the application of additive manufacturing methods for auxetic structures: a review

2021

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Auxetic structures are a special class of structural components that exhibit a negative Poisson's ratio (NPR) because of their constituent materials, internal microstructure, or structural geometry. To realize such structures, specialized manufacturing processes are required to achieve a dimensional accuracy, reduction of material wastage, and a quicker fabrication. Hence, additive manufacturing (AM) techniques play a pivotal role in this context. AM is a layer-wise manufacturing process and builds the structure as per the designed geometry with appreciable precision and accuracy. Hence, it is extremely beneficial to fabricate auxetic structures using AM, which is otherwise a tedious and expensive task. In this study, a detailed discussion of the various AM techniques used in the fabrication of auxetic structures is presented. The advancements and advantages put forward by the AM domain have offered a plethora of opportunities for the fabrication and development of unconventional structures. Therefore, the authors have attempted to provide a meaningful encapsulation and a detailed discussion of the most recent of such advancements pertaining to auxetic structures. The article opens with a brief history of the growth of auxetic materials and later auxetic structures. Subsequently, discussions centering on the different AM techniques employed for the realization of auxetic structures are conducted. The basic principle, advantages, and disadvantages of these processes are discussed to provide an in-depth understanding of the current level of research. Furthermore, the performance of some of the prominent auxetic structures realized through these methods is discussed to compare their benefits and shortcomings. In addition, the influences of geometric and process parameters on such structures are evaluated through a comprehensive review to assess their feasibility for the latermentioned applications. Finally, valuable insights into the applications, limitations, and prospects of AM for auxetic structures are provided to enable the readers to gauge the vitality of such manufacturing as a production method.

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Section: Common Auxetic Structures and Their Prominent Characteristicsmentioning

confidence: 90%

On the application of additive manufacturing methods for auxetic structures: a review

2021

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“…Nevertheless, its huge disadvantage is the regions of high stress that occur in the joints where most failures occur. 24 In terms of chiral geometry, it is the second most studied geometry and consists of a circle with three or more arms stretching outward. In this case, when exposed to uniaxial compression loads, the structures contract transversely because the deformation mechanism is characterized by the rotation of the central circles and bending of the ligaments.…”

Section: Geometry Of Auxetic Structuresmentioning

confidence: 99%

Fatigue response of auxetic structures: A review

Parente,

Reis,

Berto

2024

Fatigue Fract Eng Mat Struct

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The fatigue behavior of auxetic metamaterials is an interesting and recent research topic that will deserve future attention. How different geometries can interact with cyclic loadings is still an open question for these kinds of structures. Therefore, this review aims to provide an update on the state of the art on the fatigue response of auxetic structures, showing which research questions are open and possible future developments. As will be evident from this review, there is still room for further improvements that will allow these structures to become much more attractive for load‐bearing applications.

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“…Moreover, for some negative values of Poisson’s ratio, shear resistance will increase [ 70 ]. Fracture toughness can reach an increase of 225% [ 6 , 71 ], and fatigue life resistance [ 72 ] and stress–strain curves can be, in general, two orders of magnitude greater than those of the non-auxetic material [ 73 ]. The auxetic effect becomes even better after the yield point [ 74 ].…”

Section: Auxetic Materialsmentioning

confidence: 99%

Fused Deposition Modelling of Polymeric Auxetic Structures: A Review

et al. 2023

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Additive Manufacturing (AM) techniques have recently attracted the attention of scientists for the development of prototypes with complex or particular geometry in a fast and cheap way. Among the different AM processes, the Fused Deposition Modelling process (FDM) offers several advantages in terms of costs, implementation features and design freedom. Recently, it has been adopted to realise auxetic structures, which are characterised by negative Poisson ratio, enhanced mechanical properties, and a higher compression resistance than conventional structures. This review outlines the use of AM processes, in particular FDM, to design and obtain auxetic structures, with the final aim to exploit their applications in different fields. The first part of this work presents a brief classification of auxetic structures and materials. Subsequently, a summary of additive manufacturing processes is presented, focusing on the use of FDM and its limitations. Finally, the studies on the use of additive manufacturing to produce auxetic structures are shown, evidencing the potential of the concurrent combination of a fast prototyping technique such as FDM and the characteristics of polymer- and/or composite-based auxetic structures. Indeed, this new technological field opens the possibility of realising novel structures with integrated smart behaviour, multifunctional properties, compression resistance, and a tailored microstructure and shape.

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Fatigue Life of Auxetic Re-entrant Honeycomb Structure

Cited by 7 publications

References 17 publications

On the application of additive manufacturing methods for auxetic structures: a review

On the application of additive manufacturing methods for auxetic structures: a review

Fatigue response of auxetic structures: A review

Fused Deposition Modelling of Polymeric Auxetic Structures: A Review

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