Article
Chemistry, Physical
Marco Maurizi, Chao Gao, Filippo Berto
Summary: We have achieved the inverse design of non-uniformly assembled lattices using a machine learning approach, allowing independent control over the geometry and topology of periodic and aperiodic structures, resulting in superior performance.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Hao Zhou, Xinye Cao, Chuanlei Li, Xiaoyu Zhang, Hualin Fan, Hongshuai Lei, Daining Fang
Summary: This study proposes an innovative design strategy for self-supporting lattice units that considers the geometric constraints of additive manufacturing, deriving the elastic constitutive relation using the nodal displacement method. This design strategy has been employed in the design of novel ultra-light spacecraft structures.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Mechanics
Hongliang Liu, Zhe Yang, Wei Wang, Chengming Xuan, Weikai Xu
Summary: In this paper, a new lattice truss material metasurface design method is proposed, which can adjust the phase of flexural waves by adjusting the vertex angle. The microstructure configurations of truss materials allow for abnormal refraction and beam focusing effects. Moreover, the operating frequency domain of metasurfaces can be expanded and adjusted by increasing or decreasing the number of microstructure arrays.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Leonel Quinteros, Viviana Meruane, Eduardo Lenz Cardoso
Summary: The emergence of additive manufacturing and advances in structural optimization have led to the development of tailored cellular materials with complex architectures that show higher structural efficiency compared to traditional materials. Truss-like cellular structures, in particular, have great potential for lightweight applications due to their high strength/stiffness to mass ratio. These materials may also exhibit impressive vibration isolation properties known as phononic band gaps. The study focuses on the topology optimization of 2D truss-like cellular structures to create a material with outstanding vibration isolation at specific frequency ranges. The proposed formulation effectively addresses convergence problems associated with mode switching and repeated eigenvalues.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2021)
Article
Polymer Science
Pritam Poddar, Mark Olles, Denis Cormier
Summary: This paper investigates a novel additive manufacturing technique called axial lattice extrusion (ALE) that greatly enhances the mechanical properties of polymeric lattice structures, particularly through fiber reinforcement. The ALE process shows great potential for fabricating high-strength, lightweight, large-scale carbon-fiber composite components.
Article
Mechanics
Shuheng Wang, Yongbin Ma, Zichen Deng
Summary: In this paper, an analytical homogenization formula is derived for the effective elastic properties of truss lattice materials. The formula is based on the numerical representative volume element method and asymptotic homogenization method. It can handle the geometric parameters, elastic properties, and loading direction as independent variables without repeated modelling. The formula yields the same results as the meso-mechanics model by Gibson and Ashby, and it can evaluate and control the elastic properties of complex truss lattice structures conveniently. Design methodologies for stretching-dominated compound truss lattice structures with controllable anisotropy and optimal isotropic elasticity are proposed based on the analytical homogenization formula. The isotropy conditions and calculation results obtained from the formula are verified through the manufacturing and testing of 3D elastically isotropic truss lattice structures and 2D bi-material elastically isotropic lattice structures.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Electrical & Electronic
Daniel Calegaro, Stefano Mariani
Summary: Periodic elastic metamaterials have the ability to block the transmission of elastic waves, creating band gaps. By using active materials, the band gaps can be actively adjusted in real-time, making use of piezoelectricity and instability-induced pattern transformation.
Article
Materials Science, Multidisciplinary
Liang Dong
Summary: A new snap-fit method has been developed for octet-truss lattice construction, with experimental and simulation results revealing important findings on structural performance and efficiency. The method offers versatility in material selection and cost-effective production, while achieving higher mechanical robustness and structural strength.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Konstantinos Karapiperis, Kaoutar Radi, Zifan Wang, Dennis M. Kochmann
Summary: A variational formulation of a beam model is presented for predicting the inelastic and geometrically nonlinear mechanical behavior of cellular and truss-based architected materials. The model is calibrated and validated through single-strut tests and experiments of additively manufactured specimens, demonstrating its promise as an efficient design tool for architected materials in engineering applications.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Construction & Building Technology
He Wang, Sensen Li, Yang Liu, Peng Wang, Fengnian Jin, Hualin Fan
Summary: The introduction of foam-filling schemes can effectively enhance the compression and bending resistance of woven lattice truss sandwich panels (WLTSP) and improve their crashworthiness. Foam-filled WLTSPs can increase total energy absorption (EA) but reduce specific energy absorption (SEA), with polyurethane foam identified as a superior core-filling material for enhancing crashworthiness.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Mehmet Fethi Ertenli, Erdal Erdal, Alper Buyukkaragoz, Ilker Kalkan, Ceyhun Aksoylu, Yasin Onuralp Ozkilic
Summary: The study aims to develop analytical methods for estimating the elastic buckling moments of steel beams with multiple circular perforations. The conventional equations in codes and literature underestimate the buckling moments of these beams. Finite element analyses confirmed that the current design codes overestimate the buckling loads of beams with perforations.
STEEL AND COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Tulio R. C. Felipe, Andre T. Beck
Summary: This study introduces novel benchmark examples of dynamic failure paths for truss structures, utilizing a logarithmic strain measure and continuum material damage model. It reveals the significant impact of material degradation on the dynamic behavior of truss structures.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Samer M. El-Zahab, Nabil Fares, Hassan Ghanem, Tarek Dandashli
Summary: The study introduces a new concept in engineered materials called truss substructured materials (TSMs) that exhibit mechanical abilities rarely found in nature. Through defining, classifying, and naming TSMs, theoretical modeling, software development, and parameter studies, new materials with unique abilities such as negative Poisson ratio and self-remodeling under stress are introduced. Further research in 3D using 3D printing is needed to make these materials a viable real-world solution.
MULTIDISCIPLINE MODELING IN MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Mechanical
Kun Wang, Haiyu Lv, Xiaoning Liu, Anfu Zhang, Gengkai Hu
Summary: In this work, the basic ingredients and design schemes for more general extremal materials based on truss lattices were studied. The effective elastic tensor was derived using singular value decomposition. The proposed method is also applicable for more general extremal materials in three-dimensional cases.
ACTA MECHANICA SINICA
(2023)
Article
Engineering, Multidisciplinary
Quan-Wei Li, Bo-Hua Sun
Summary: The biomimetic design of engineering structures aims to improve mechanical properties by imitating biological structures. However, current biomimetic structures are not as good as many biomaterials. By studying the structure of E. aspergillum, a lattice structure inspired by it was proposed and its mechanical properties surpassed E. aspergillum. This lattice structure can be applied to engineering structures to improve strength and reduce redundancy of material.
BIOINSPIRATION & BIOMIMETICS
(2023)
Article
Engineering, Mechanical
Rosaria Del Toro, Maria Laura De Bellis, Marcello Vasta, Andrea Bacigalupo
Summary: This article presents a multifield asymptotic homogenization scheme for analyzing Bloch wave propagation in non-standard thermoelastic periodic materials. The proposed method derives microscale field equations, solves recursive differential problems within the unit cell, establishes a down-scaling relation, and obtains average field equations. The effectiveness of this approach is validated by comparing dispersion curves with those from the Floquet-Bloch theory.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Yue Bao, Zhengcheng Yao, Yue Zhang, Xueman Hu, Xiandong Liu, Yingchun Shan, Tian He
Summary: This paper proposes a novel triple-gradient phononic acoustic black hole (ABH) beam that strategically manipulates multiple gradients to enhance its performance. The study reveals that the ABH effect is not solely brought about by the thickness gradient, but also extends to the power-law gradients in density and modulus. The synergistic development of three different gradient effects leads to more pronounced and broader bandgaps in PCs.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Matthias Ryser, Jason Steffen, Bekim Berisha, Markus Bambach
Summary: This study investigates the feasibility of replacing complex experiments with multiple simpler ones to determine the anisotropic yielding behavior of sheet metal. The results show that parameter identifiability and accuracy can be achieved by combining multiple specimen geometries and orientations, enhancing the understanding of the yield behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Wenjun Li, Pengfei Zhang, Siyong Yang, Shenling Cai, Kai Feng
Summary: This study presents a novel two-dimensional non-contact platform based on Near-field Acoustic Levitation (NFAL), which can realize both one-dimensional and two-dimensional transportation. Numerical and experimental results prove the feasibility and ease of this method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Shuo Liu, Lu Che, Guodong Fang, Jun Liang
Summary: This study presents a novel lamina conjugated bond-based peridynamic (BB-PD) model that overcomes the limitations of material properties and is applicable to composite laminates with different stacking sequences. The accuracy and applicability of the model are validated through simulations of elastic deformation and progressive damage behavior, providing an explanation of the damage modes and failure mechanisms of laminated composite materials subjected to uniaxial loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Omar El-Khatib, S. Kumar, Wesley J. Cantwell, Andreas Schiffer
Summary: Sandwich-structured honeycombs (SSHCs) are hierarchical structures with enhanced mass-specific properties. A model capable of predicting the elastic properties of hexagonal SSHCs is presented, showing superior in-plane elastic and shear moduli compared to traditional honeycombs, while the out-of-plane shear moduli are reduced.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Zhi-Jian Li, Hong-Liang Dai, Yuan Yao, Jing-Ling Liu
Summary: This paper proposes a process-performance prediction model for estimating the yield strength and ultimate tensile strength of metallic parts fabricated by powder bed fusion additive manufacturing. The effect of main process variables on the mechanical performance of printed metallic parts is analyzed and the results can serve as a guideline for improvement. The accuracy of the proposed model is validated by comparison with literature.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
Saman A. Bapir, Kawa M. A. Manmi, Rostam K. Saeed, Abdolrahman Dadvand
Summary: This study numerically investigates the behavior of an ultrasonically driven gas bubble between two parallel rigid circular walls with a cylindrical micro-indentation in one wall. The primary objective is to determine the conditions that facilitate the removal of particulate contamination from the indentation using the bubble jet. The study found that the bubble jet can effectively remove contamination from the indentation for certain ranges of indentation diameter, but becomes less effective for larger indentation diameters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)
Article
Engineering, Mechanical
E. Polyzos, E. Vereroudakis, S. Malefaki, D. Vlassopoulos, D. Van Hemelrijck, L. Pyl
Summary: This research investigates the elastic and damage characteristics of individual composite beads used in 3D printed composites. A new analytical probabilistic progressive damage model (PPDM) is introduced to capture the elastic and damage attributes of these beads. Experimental results show strong agreement with the model in terms of elastic behavior and ultimate strength and strain.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2024)