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Hedayati, R. (author), Lakshmanan, Sandhya P. (author)The aim of the present work is to design active acoustic metamaterial consisting of an array of Helmholtz resonators and fabricating them using an additive manufacturing technique in order to assist in a reduction in noise levels in aerospace applications. To this aim, initially, a passive metamaterial consisting of an array of 64 Helmholtz...journal article 2024
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Mohammadi, Kaivan (author), Shafia, Moein (author), Akbari, Javad (author), Hedayati, R. (author)Pentamodes (first conceived theoretically by Milton and Cherkaev) are a very interesting class of mechanical metamaterials that can be used as building blocks of structures withdecoupled bulk and shear moduli. The pentamodes usually are composed of double cone-shaped struts with the middle diameter being large and the end diameters being tiny...journal article 2024
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Alinia, Maysam (author), Nopour, Reza (author), Aghdam, Mohammad Mohammadi (author), Hedayati, R. (author)Auxetic materials, materials demonstrating negative Poisson's ratio, have revolutionized the use of materials in industries, as they demonstrate superb acoustic response, fracture resistance, and energy absorption. For the first time, this study embraces the free vibration of conical shells consisting of an auxetic core with and without ring...journal article 2023
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Hedayati, R. (author), Yousefi, Armin (author), Dezaki, Mohammadreza Lalegani (author), Bodaghi, Mahdi (author)Both 2D and 3D re-entrant designs are among the well-known prevalent auxetic structures exhibiting negative Poisson's ratio. The present study introduces novel analytical relationships for 2D re-entrant hexagonal honeycombs for both negative and positive ranges of the cell interior angle θ (θ<0 showing a negative Poisson's ratio). The...journal article 2023
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Hedayati, R. (author), Stulova, Victoria (author)Due to payload weight limitations and human vulnerability to harsh space conditions, it is preferable that the potential landing location for humans has an already constructed habitat preferably made from in situ materials. Therefore, the prospect of utilizing a readily available Martian material, such as regolith, in an easily programmable...journal article 2023
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Hedayati, R. (author), Stulova, Victoria (author)Heavily resource-reliant transportation and harsh living conditions, where humans cannot survive without a proper habitat, have prevented humans from establishing colonies on the Moon and Mars. Due to the absence of an atmosphere, potential habitats on the Moon or Mars require thick and strong structures that can withstand artificially...review 2023
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Sadighi, M. (author), Alderliesten, R.C. (author), Fathi, Azadeh (author), Soltannia, Babak (author), Hedayati, R. (author)Damages to aircraft fuselages by ice impactors are categorized as barely visible impact damage (BVID). As the application of composite laminates in manufacturing aircraft fuselage is increasing rapidly, studying hail impact on composite laminates seems crucial. Investigation of variation of delamination area and link-up area for different...journal article 2023
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Hedayati, R. (author), Roudbarian, Nima (author), Tahmasiyan, Sara (author), Bodaghi, Mahdi (author)Origami structures are a traditional Japanese art that have recently found their way into engineering applications due to their powerful capability to transform flat 2D structures into complex 3D structures along their creases. This has given a rise to their application as designer materials with unprecedented mechanical characteristics, also...journal article 2023
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Hedayati, R. (author), Yousefi, Armin (author), Bodaghi, Mahdi (author)With dramatic increase in 3D printing applications in industry, sandwich panels with 3D printed cores have gained a lot of attention recently. In harmony with global movement towards sustainability and low-carbon emission industries, sandwich panels with easy-to-repair and cost-effective cores would be very attractive structures. In this...journal article 2022
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- Hedayati, R. (author), Sheikhnejad, Yahya (author), Aghdam, Mohammad Mohammadi (author) contribution to periodical 2022
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Sheikhnejad, Yahya (author), Hedayati, R. (author), Nassab, Seyed Abdolreza Gandjalikhan (author)This special issue presents up-to-date studies on porous media with a special focus on analytical models and their capability in reconstructing numerical and experimental results. The published papers included within this special issue provide analytical and semi-analytical models for a wide range of problems including micro-polar liquid flow...review 2022
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Talebi, S. (author), Hedayati, R. (author), Sadighi, M. (author), Ashoori, A. R. (author)The aim of present work is to address nonlinear dynamic thermal buckling of shallow spherical functionally graded porous shells subjected to transient thermal loading using the first order shear deformation theory (FSDT). A power-law distribution as well as cosine-type porosity distribution are used to model the variation of constituents...journal article 2022
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Wu, Bin (author), Hedayati, R. (author), Li, Zhehua (author), Aghajanpour, Mahsa (author), Zhang, Guichang (author), Zhang, Junhong (author), Lin, Jiewei (author)Bird strikes are one major accident for aircraft engines and can inflict heavy casualties and economic losses. In this study, a smoothed particle hydrodynamics (SPH) mallard model has been used to simulate bird impact to rotary aero-engine fan blades. The simulations were performed using the finite element method (FEM) at LS-DYNA. The...journal article 2022
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Roudbarian, Nima (author), Jebellat, Ehsan (author), Famouri, Seyedfarzad (author), Baniasadi, Mahdi (author), Hedayati, R. (author), Baghani, Mostafa (author)Triply periodic minimal surfaces (TPMS) metamaterials and shape-memory polymer (SMP) smart materials are known for their beneficial attributes in novel scientific and industrial fields. Through TPMS designs, low weight accompanied by high surface area are achievable, which are known as crucial parameters in many fields, such as tissue...journal article 2022
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Shakibanezhad, R. (author), Sadighi, M. (author), Hedayati, R. (author)Study of porous materials, in particular closed-cell foams, has always attracted researchers’ interest due to the advantages these materials offer in applications where low weight, buoyancy, insulation, or energy absorption is of importance. In this study, quasi-static compressive experimental tests are conducted for low-, medium-, and high...journal article 2022
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Sheikhnejad, Yahya (author), Hedayati, R. (author), Nassab, Seyed Abdolreza Gandjalikhan (author)This special issue aimed to contribute to the novelties and frontiers in porous media with a special focus on analytical models and their comparison with numerical and experimental approaches. The published papers included within this special issue help engineers and programmers to keep the models of real apparatus as simple and accurate as...review 2022
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Hedayati, R. (author), Bodaghi, Mahdi (author)Acoustic metamaterials are synthetic materials, made of repeating unit cells that are designed to address an acoustic problem, through the rational design of their micro-featurecontribution to periodical 2022
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Jarrah, Hamid Reza (author), Zolfagharian, Ali (author), Hedayati, R. (author), Serjouei, Ahmad (author), Bodaghi, Mahdi (author)This paper presents nonlinear finite element (FE) models to predict time-and tempera-ture-dependent responses of shape memory polymer (SMP) foams in the large deformation regime. For the first time, an A SMP foam constitutive model is implemented in the ABAQUS FE package with the aid of a VUMAT subroutine to predict thermo-visco-plastic...journal article 2021
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Hedayati, R. (author), Güven, Aysun (author), van der Zwaag, S. (author)Materials with a negative Poisson's ratio, also known as auxetics, have attracted a lot attention as they have shown innovation potential in applications for energy damping, modern fasteners, biomedical implants, piezoelectric sensors, and soft actuators. In this study, we introduce different patterns of graded distribution of unit cells with...journal article 2021
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Yousefi, Armin (author), Jolaiy, Saman (author), Hedayati, R. (author), Serjouei, Ahmad (author), Bodaghi, Mahdi (author)Bonded patches are widely used in several industry sectors for repairing damaged plates, cracks in metallic structures, and reinforcement of damaged structures. Composite patches have optimal properties such as high strength‐to‐weight ratio, easiness in being applied, and high flexibility. Due to recent rapid growth in the aerospace industry,...journal article 2021