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.

This paper examines the influence of solution concentration parameters and die diameter on the properties of carbon-fiber-reinforced polyethersulfone towpregs using the solution method. The polymer content, porosity, and tensile strength were determined for the towpregs obtained.

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В работе рассмотрено влияние параметров концентрации раствора и диаметра фильеры на свойства тоупрегов из полиэфирсульфона, армированного углеродным волокном, по растворному методу. Для полученных тоупрегов определено содержание полимерной матрицы, пористость и предел прочности.

В статье рассмотрены современные направления развития высокопрочных титановых сплавов. Представлены последние разработки в области отечественных высокопрочных титановых сплавов различных классов, а также титанополимерных композиционных материалов на их основе. Приведены значения механических свойств, характеристики трещиностойкости и микроструктура титановых сплавов.