Snap-through of functionally graded graphene origami-enabled auxetic metamaterial doubly curved nonlinear shells DOI
Mohamed A. Eltaher, S.A. Mohamed, Nazira Mohamed

et al.

Mechanics Based Design of Structures and Machines, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 20

Published: Dec. 8, 2024

The lightweight design of thin-walled curved structures as spherical shells are frequently implemented in architecture, aerospace, mechanical, automotive, nuclear, and defense structures. Under the transverse loads, may largely deform hence snap from one equilibrium position to other. Thus, this work aims develop a mathematical model computational solution investigate nonlinear bending snap-through behavior doubly auxetic metamaterial shell subjected transversal loading, for first time. is composed several layers through thickness, each layer manufactured copper (Cu) matrix reinforced with specified weight fraction graphene origami (GOAM). mechanical properties GOAM panel presented described by functions volume folding degree. Three types GOAM-distributions considered, which U-type, X-type, O-type. theoretical framework Kirchhoff–Love hypotheses thin von Karman type nonlinearity used derive governing equations. differential quadrature method (DQM) discretize space domain convert partial equation algebraic equations terms displacement field. An efficient incremental iterative procedure developed solve predict behavior. A conversion validation isotropic considered. Several numerical results conducted considering effects changing content, distribution pattern, degree, curvature thickness. For panels exhibiting behavior, increasing leads higher limiting load; however, instability gap enlarged.

Language: Английский

Nonlinear vibrations of graphene nanoplates with arbitrarily orientated crack located in magnetic field using nonlocal elasticity theory DOI

Tayyeb Pourreza,

Ali Alijani, Vahid Arab Maleki

et al.

International Journal of Structural Integrity, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 2, 2025

Purpose The study explores frequency curves and natural frequencies as functions of crack length, angle, magnetic field strength small size effects under the three boundary conditions. Design/methodology/approach This investigates nonlinear dynamics a single-layered graphene nanoplate with an arbitrarily oriented influence field. research focuses on conditions: simply supported, clamped clamped-simply supported. effect is modeled by incorporating membrane forces additional flexural moments created into equation motion. Findings Results reveal that increasing intensity reduces stiffness nanoplate, increases compressive load lowers its frequency. Additionally, excessive may lead to static buckling. critical dimensionless fields are found be 33.6, 95.1 72.3 for All edges supported (SSSS), fully (CCCC) two opposite other (CSCS) nanoplates, respectively. Furthermore, SSSS CCCC conditions, increase in angle results softening behavior hard spring. In contrast, SCSC condition exhibits behavior. These findings emphasize importance considering angled cracks electromagnetic loads analysis design graphene-based nanostructures. Originality/value Novel equations derived account applied induced motion discretized using Galerkin technique, analytical response obtained via multiple time-scales perturbation technique.

Language: Английский

Citations

1
Nonlinear free vibration of sandwich beam with data-driven inverse-designed auxetic core based on deep learning DOI
Xi Fang, Hui‐Shen Shen, Hai Wang

et al.

European Journal of Mechanics - A/Solids, Journal Year: 2025, Volume and Issue: unknown, P. 105626 - 105626

Published: Feb. 1, 2025

Language: Английский

Citations

1
Experimental mechanical properties, nonlinear bending and instability analysis of 3D-printed auxetic tubular metastructures using multiscale finite element and Ritz methods DOI
Fatemeh Ghasemi, Erfan Salari,

Amir Hosein Zamanian

et al.

Mechanics of Advanced Materials and Structures, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 24

Published: Dec. 10, 2024

In the field of medical technology, specialized equipment utilizes tubular metastructures with a negative Poisson's ratio in vascular stents to reduce risk embolism. The deliberate incorporation auxetic structures into stent design offers several benefits over traditional stents. This study examines nonlinear instability and bending responses reentrant perfect imperfect 3D-printed metastructures. First, governing equations for tube geometric imperfections under transverse axial mechanical loads are derived using von-Kármán assumption Timoshenko theory. Then, principle virtual displacement. physical characteristics structure Malek-Gibson relations, while tensile tests digital image correlation (DIC) used determine properties polylactic acid (PLA). Scanning electron microscopy (SEM) images help investigate variations modulus elasticity ultimate strength dogbone specimens, Ritz method Chebyshev polynomials is employed discretize equations. Second, two numerical algorithms analyze static behavior metatube within framework. validation conducted representative volume element (RVE) unit cell based on literature finite software Abaqus. Following mathematical model, an extensive investigation assess how differing parameters impact analysis tube.

Language: Английский

Citations

6
Uncertain static responses of structures involving type-1 and type-2 fuzzy external loadings DOI
Dhabaleswar Mohapatra, Diptiranjan Behera, Snehashish Chakraverty

et al.

Engineering Computations, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

Purpose Uncertainties present in the system parameters and/or external forces play a significant role static analysis of structures. Recently, fuzzy numbers have been used to model these uncertainties. It may be noted that when uncertainties are considered only for loading terms type-1 or type-2 numbers, problem is converted linear equations with crisp coefficients. In this regard, purpose research propose new technique solve Design/methodology/approach very interesting effective techniques such problems. A methodology based on parametric forms and convert into interval systems equations. Further, concept double triple utilised systems. Findings The proposed has successfully implemented as well environments. Accordingly, sample mathematical problems application problems, namely 8-bar truss structure uniform rectangular sheet structure, solved. results contrasted solution obtained by existing approaches found good agreement. Originality/value To deal uncertainty loadings, here. Also, approach presented work shows originality research.

Language: Английский

Citations

0
Compressive Behavior of 3D‐Printed Stiffened Bioinspired Tubular Metamaterials DOI Open Access

Saman Ghoddousi,

Zahra Samieiyani,

Majid Safarabadi

et al.

Advanced Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

This study proposes innovative bioinspired tubular metamaterial structures modeled after the zigzag patterns commonly found in natural systems. The straight, curved and their symmetrical counterparts serve as inspiration for design of a novel biomimetic tube. To enhance mechanical performance these tubes, circumferential stiffeners are incorporated, varying both quantity arrangement. Various samples fabricated using additive manufacturing, experimental testing combined with finite‐element analysis is employed to assess deformation behavior, energy absorption (EA), specific EA (SEA), effective Young's modulus ( E eff ). Results demonstrate that addition significantly enhances capacity behavior by overall Poisson's ratio enhancing stiffness. Straight tubes exhibit highest stiffness, while symmetric show up 33% improvement stiffener integration. Nonsymmetric configurations enhanced integration superior 52%. Stiffeners SEA 42% tubes. parametric further emphasizes critical role geometric parameters optimizing performance. These results provide valuable insights designing advanced high variety applications.

Language: Английский

Citations

0
Nonlocal forced vibration analysis of graphene platelets-reinforced functionally graded triply periodic minimal surface nanoplates embedded in elastic foundation using Reddy-IGA DOI
Quoc Hoa Pham, Thanh Cuong‐Le

Mechanics Based Design of Structures and Machines, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 27

Published: March 26, 2025

Language: Английский

Citations

0
Evaluations of three-point bending and energy absorption performances of novel auxetic honeycomb circular tubes under different impact loading DOI
Qulan Zhou, Zhi-Hui Xu, Y.J. Cui

et al.

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 475, P. 141132 - 141132

Published: April 11, 2025

Language: Английский

Citations

0
Exploring honeycomb structures: A review of their types, general applications, and role in vibration damping and structural stability DOI
Hasan Mohammed Hameed, Hamad M. Hasan

Structures, Journal Year: 2025, Volume and Issue: 76, P. 108837 - 108837

Published: April 15, 2025

Language: Английский

Citations

0
Machine learning-assisted investigation on nonlinear vibration analysis of bio-inspired auxetic tubes DOI
Fatemeh Ghasemi,

Arshia Salari,

Erfan Salari

et al.

International Journal of Structural Integrity, Journal Year: 2025, Volume and Issue: unknown

Published: April 20, 2025

Purpose Auxetic tubular structures with negative Poisson’s ratios have gained significant attention in biomedical applications, particularly vascular and esophageal stents, due to their potential reduce embolism risks. This study aims investigate the nonlinear vibration characteristics of such develop accurate predictive models using machine learning (ML) techniques. Design/methodology/approach The governing equations auxetic tubes are derived Hamilton’s principle von-Kármán’s assumptions, while Malek-Gibson relations determine effective mechanical properties. behavior polylactic acid (PLA) is experimentally analyzed through tensile testing digital image correlation (DIC) additional insights from scanning electron microscopy. solved via Ritz method, vibrational assessed direct displacement control approach. Predictive modeling performed six ML algorithms – CatBoost, decision tree, random forest, gradient boosting extreme (XGBoost) support vector regression (SVR) along an artificial neural network (ANN). Response surface methodology employed optimize effects edge supports, radius cell geometry on behavior. Findings results demonstrate a strong agreement between ML/ANN predictions analytical confirming reliability developed models. analysis reveals that variations significantly influence response structures. optimized configurations enhance structural performance, making these metastructures highly suitable for applications. Originality/value uniquely integrates modeling, experimental ML-based comprehensively assess metastructures. findings provide valuable design next-generation improving performance expanding

Language: Английский

Citations

0
Low-velocity impact on a CFRP sandwich plate with a reentrant auxetic core DOI

Hossein Peyghani,

Mehdi Ranjbar-Roeintan

Mechanics of Advanced Materials and Structures, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 16

Published: Oct. 29, 2024

Theoretical analysis is utilized to model the low-velocity impact (LVI) on a Carbon-Fiber Reinforced Polymer (CFRP) sandwich plate with reentrant auxetic core. The Zig-Zag theory employed formulate displacement field of plate. mechanical characteristics core unit cell are determined through application Gibson's equations. influences thickness, angle, number layers along impactor radius, and initial velocity LVI study CFRP investigated in detail.

Language: Английский

Citations

3