Re‐entrant auxetic structures fabricated by fused deposition modeling: An experimental study of influence of process parameters under compressive loading

Vyavahare, Swapnil; Kumar, Shailendra

doi:10.1002/pen.25546

Cited by 30 publications

(23 citation statements)

References 43 publications

(52 reference statements)

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“…This relative difference between the loading direction and build direction results in different mechanical behavior of structures with variation of layer height. Similar trend is observed by Vyavahare et al [ 33 ] while performing compression testing on re‐entrant auxetic structures of ABS and PLA material.…”

Section: Resultssupporting

confidence: 84%

“…They found that extrusion temperature significantly affects the strength of the part. Vyavahare and Kumar [ 33 ] investigated the influence of layer height, line direction, and number of shells on strength of re‐entrant structures made of ABS and PLA. They reported that the strength of the structure proportionately varies with the change in layer height.…”

Section: Introductionmentioning

confidence: 99%

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Parametric investigation for mechanical properties of tetra‐anti‐chiral auxetic structures of polymer under compressive loading

Teraiya

Vyavahare

Kumar

2022

Polymer Engineering & Sci

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In the present work, an experimental investigation is performed to study the influence of process parameters on mechanical properties of tetra-anti-chiral auxetic structures manufactured by material extrusion (ME) technique of additive manufacturing (AM). Process parameters namely layer height, print speed, and print temperature are considered, while responses are compressive strength (σ), modulus (E), and specific energy absorption (SEA). Specimens of acrylonitrile-butadiene-styrene (ABS) polymer are fabricated and then tested under compressive loading. From the experimental results, it is observed that all process parameters significantly influence the mechanical properties of the structure. Scanning electron microscope (SEM) is used to study microstructural defects of the tested specimen. To maximize the responses, optimization of process parameter is performed using desirability function approach. Regressive models are developed to predict the mechanical properties.

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Section: Resultssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Parametric investigation for mechanical properties of tetra‐anti‐chiral auxetic structures of polymer under compressive loading

Teraiya

Vyavahare

Kumar

2022

Polymer Engineering & Sci

Self Cite

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“…Polymeric 3D auxetics have been achieved, for example, using fused-deposition modelling (FDM) [75], which is low-cost and highly interesting for biomedical applications as several PLA, PCL and TPU medical grade printing filaments are already available.…”

Section: Additive Manufacturingmentioning

confidence: 99%

Auxetic Metamaterials for Biomedical Devices: Current Situation, Main Challenges, and Research Trends

et al. 2022

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Auxetic metamaterials are characterized by a negative Poisson ratio (NPR) and display an unexpected property of lateral expansion when stretched and densification when compressed. Auxetic properties can be achieved by designing special microstructures, hence their classification as metamaterials, and can be manufactured with varied raw materials and methods. Since work in this field began, auxetics have been considered for different biomedical applications, as some biological tissues have auxetic-like behaviour due to their lightweight structure and morphing properties, which makes auxetics ideal for interacting with the human body. This research study is developed with the aim of presenting an updated overview of auxetic metamaterials for biomedical devices. It stands out for providing a comprehensive view of medical applications for auxetics, including a focus on prosthetics, orthotics, ergonomic appliances, performance enhancement devices, in vitro medical devices for interacting with cells, and advanced medicinal clinical products, especially tissue engineering scaffolds with living cells. Innovative design and simulation approaches for the engineering of auxetic-based products are covered, and the relevant manufacturing technologies for prototyping and producing auxetics are analysed, taking into consideration those capable of processing biomaterials and enabling multi-scale and multi-material auxetics. An engineering design rational for auxetics-based medical devices is presented with integrative purposes. Finally, key research, development and expected technological breakthroughs are discussed.

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“…The feasibility of FDM producing vertical structural components with the help of support structures has made it the method of choice for experimentation of such structures at minimal costs. Such structures have demonstrated a parabolic relationship between the Poisson's ratio and its re-entrant angle when analyzed experimentally [75,76]. Because the material is highly anisotropic, the properties of the parent materials seem to have a dominant effect on the auxetic behavior of the composites.…”

Section: Fdmmentioning

confidence: 99%

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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Re‐entrant auxetic structures fabricated by fused deposition modeling: An experimental study of influence of process parameters under compressive loading

Cited by 30 publications

References 43 publications

Parametric investigation for mechanical properties of tetra‐anti‐chiral auxetic structures of polymer under compressive loading

Parametric investigation for mechanical properties of tetra‐anti‐chiral auxetic structures of polymer under compressive loading

Auxetic Metamaterials for Biomedical Devices: Current Situation, Main Challenges, and Research Trends

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

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