Search Results - "Khakalo, Sergei"

Wood-based superblack by Zhao, Bin, Shi, Xuetong, Khakalo, Sergei, Meng, Yang, Miettinen, Arttu, Turpeinen, Tuomas, Mi, Shuyi, Sun, Zhipei, Khakalo, Alexey, Rojas, Orlando J., Mattos, Bruno D.

“…Light is a powerful and sustainable resource, but it can be detrimental to the performance and longevity of optical devices. Materials with near-zero light…”
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Anisotropic strain gradient thermoelasticity for cellular structures: Plate models, homogenization and isogeometric analysis by Khakalo, Sergei, Niiranen, Jarkko

“…For three-dimensional cellular plate-like structures with a triangular (extruded lattice) microarchitecture, the article develops a pair of two-scale plate…”
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Lattice structures as thermoelastic strain gradient metamaterials: Evidence from full-field simulations and applications to functionally step-wise-graded beams by Khakalo, Sergei, Niiranen, Jarkko

“…The present work investigates the mechanical and thermomechanical bending response of beam structures possessing a triangular lattice microarchitecture. The…”
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Form II of Mindlin's second strain gradient theory of elasticity with a simplification: For materials and structures from nano- to macro-scales by Khakalo, Sergei, Niiranen, Jarkko

“…The fundamental equations for Form II of Mindlin's second strain gradient elasticity theory for isotropic materials are first derived. A corresponding…”
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Strain gradient elasto-plasticity model: 3D isogeometric implementation and applications to cellular structures by Khakalo, Sergei, Laukkanen, Anssi

“…In the present work, we combine Mindlin’s strain gradient elasticity theory and Gudmundson–Gurtin–Anand strain gradient plasticity theory to form a unified…”
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Structural buckling analysis of pre-twisted strips by Khakalo, Sergei, Niiranen, Jarkko

“…This article focuses on the buckling response of columns formed by pre-twisting a flat, narrow and straight material strip of a rectangular cross section. The…”
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Isogeometric analysis of higher-order gradient elasticity by user elements of a commercial finite element software by Khakalo, Sergei, Niiranen, Jarkko

“…This article is devoted to isogeometric analysis of higher-order strain gradient elasticity by user element implementations within a commercial finite element…”
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Modelling size-dependent bending, buckling and vibrations of 2D triangular lattices by strain gradient elasticity models: Applications to sandwich beams and auxetics by Khakalo, Sergei, Balobanov, Viacheslav, Niiranen, Jarkko

“…The present work is devoted to the modelling of strongly size-dependent bending, buckling and vibration phenomena of 2D triangular lattices with the aid of a…”
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Gradient-elastic stress analysis near cylindrical holes in a plane under bi-axial tension fields by Khakalo, Sergei, Niiranen, Jarkko

“…This paper is devoted to a gradient-elastic stress analysis of an infinite plate weakened by a cylindrical hole and subjected to two perpendicular and…”
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Variational asymptotic homogenization of beam-like square lattice structures by Barchiesi, Emilio, Khakalo, Sergei

“…By means of variational asymptotic homogenization, using Piola’s meso-macro ansatz, we derive the linear Timoshenko beam as the macro-scale limit of a…”
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Kirchhoff–Love shells within strain gradient elasticity: Weak and strong formulations and an H 3 -conforming isogeometric implementation by Balobanov, Viacheslav, Kiendl, Josef, Khakalo, Sergei, Niiranen, Jarkko

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Variational formulation and isogeometric analysis for fourth-order boundary value problems of gradient-elastic bar and plane strain/stress problems by Niiranen, Jarkko, Khakalo, Sergei, Balobanov, Viacheslav, Niemi, Antti H.

“…The fourth-order boundary value problems of one parameter gradient-elastic bar and plane strain/stress models are formulated in a variational form within an H2…”
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Second-order homogenization of 3-D lattice materials towards strain gradient media: numerical modelling and experimental verification by Molavitabrizi, Danial, Khakalo, Sergei, Bengtsson, Rhodel, Mousavi, S. Mahmoud

“…The literature in the field of higher-order homogenization is mainly focused on 2-D models aimed at composite materials, while it lacks a comprehensive model…”
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Thermochromic Nanocellulose Films for Temperature-Adaptive Passive Cooling by Jaiswal, Aayush Kumar, Hokkanen, Ari, Khakalo, Sergei, Mäkelä, Tapio, Savolainen, Anniina, Kumar, Vinay

“…Energy efficiency in habitation spaces is a pivotal topic for maintaining energy sufficiency, cutting climate impact, and facilitating economic savings; thus,…”
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Black Bioinks from Superstructured Carbonized Lignin Particles by Mattos, Bruno D., Jäntti, Noora, Khakalo, Sergei, Zhu, Ya, Miettinen, Arttu, Parkkonen, Joni, Khakalo, Alexey, Rojas, Orlando J., Ago, Mariko

“…A renewable source of carbon black is introduced by the processing of lignin from agro‐forestry residues. Lignin side streams are converted into spherical…”
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Kirchhoff–Love shells within strain gradient elasticity: Weak and strong formulations and an H3-conforming isogeometric implementation by Balobanov, Viacheslav, Kiendl, Josef, Khakalo, Sergei, Niiranen, Jarkko

“…A strain gradient elasticity model for shells of arbitrary geometry is derived for the first time. The Kirchhoff–Love shell kinematics is employed in the…”
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Exceptional Microscale Plasticity in Amorphous Aluminum Oxide at Room Temperature by Frankberg, Erkka J., Lambai, Aloshious, Zhang, Jiahui, Kalikka, Janne, Khakalo, Sergei, Paladino, Boris, Cabrioli, Mattia, Mathews, Nidhin G., Salminen, Turkka, Hokka, Mikko, Akola, Jaakko, Kuronen, Antti, Levänen, Erkki, Di Fonzo, Fabio, Mohanty, Gaurav

“…Oxide glasses are an elementary group of materials in modern society, but brittleness limits their wider usability at room temperature. As an exception to the…”
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Thermomechanical surface instability at the origin of surface fissure patterns on heated circular MDF samples by Ferrantelli, Andrea, Baroudi, Djebar, Khakalo, Sergei, Li, Kai Yuan

“…Summary When a flat sample of medium density fibreboard (MDF) is exposed to radiant heat in an inert atmosphere, primary crack patterns suddenly start to…”
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Isogeometric finite element analysis of mode I cracks within strain gradient elasticity by Niiranen, Jarkko, Khakalo, Sergei, Balobanov, Viacheslav

“…A variational formulation within an H2 Sobolev space setting is formulated for fourth-order plane strain/stress boundary value problems following a widely-used…”
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Thermomechanical surface instability at the origin of surface fissure patterns on heated circular MDF samples by Ferrantelli, Andrea, Baroudi, Djebar, Khakalo, Sergei, Li, Kaiyuan

“…When a flat sample of medium density fibreboard (MDF) is exposed to radiant heat in an inert atmosphere, primary crack patterns suddenly start to appear over…”
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