Article
Engineering, Aerospace
Shaochong Yang, Yuan Yao, Youchen Li, Lianhua Ma, Ying Zhang, Qingsheng Yang
Summary: The study investigates the geometrically nonlinear random vibration response of stiffened laminated plates under acoustic excitation using the equivalent linearization technique combined with reduced-order model and finite element method. An EL formulation for solving nonlinear random vibration response is derived based on the force error minimization approach. The proposed method shows high accuracy and efficiency in analyzing the geometric nonlinear random vibration response of stiffened laminated plates.
Article
Engineering, Civil
Biraja Prasad Mishra, Manoranjan Barik
Summary: The geometry and orientation of stiffener play a crucial role in the analyses of stiffened plates. The NURBS-Augmented finite element method (NAFEM) has been extended to investigate the response of plates with stiffeners subjected to free vibration. The stiffener's stiffness matrix is expressed in terms of plate stiffness matrix, eliminating the need to model the stiffener separately as a beam element.
Article
Engineering, Aerospace
Nguyen Dinh Duc, Phuc Pham Minh
Summary: This paper investigates the free vibration of functionally graded carbon nanotubes reinforced composite plates with cracks, using UD distribution of carbon nanotubes and TSDT and phase field theory to form vibration equations. Finite element method with enrichment of elements around the cracked area is used for solving the equations. Computational simulation analyzes the influence of various factors on the free vibration of FG CNTRC plates, as well as investigates different boundary conditions.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Civil
Leena Sinha, Amaresh Tripathy, Amar N. Nayak, Shishir K. Sahu
Summary: This study presents experimental and numerical investigations on the free vibration characteristics of angle-ply laminated composite stiffened plates, exploring factors influencing natural frequencies and mode shapes, providing a benchmark for future research in this area.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Engineering, Marine
Kang Hu, Ping Yang, Tian Xia, Yuelin Song, Bihao Chen
Summary: This paper investigates the load-carrying behavior of stiffened plate under cyclic loads using non-linear finite element method. It analyzes the effects of four types of crack location models on the residual ultimate strength and considers the crack propagation process and influencing factors. A relationship between the number of cycles and non-dimensional ultimate strength is established to predict the strength of cracked stiffened plate under extreme cyclic loads.
Article
Mechanics
Ahmed Raza, Himanshu Pathak, Mohammad Talha
Summary: This paper investigates the influence of microstructural defects on the vibration characteristics of cracked functionally graded plates using extended finite element formulation and level set function. The effects of different parameters on the natural frequencies are discussed, and the accuracy and efficiency of the computational approach are verified.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Mechanical
Qian Xiong, Hong Guan, Hui Ma, Zhiyuan Wu, Jin Zeng, Weiwei Wang, Hongji Wang
Summary: This paper analyzes the real crack propagation path and the change of resonance frequencies in cantilever plate specimens. The study reveals that the resonance frequency decreases as the crack propagation length increases, showing a slow decrease, then a constant decrease, and finally a rapid decrease. These findings provide valuable insights into blade fatigue and the analysis of blade crack propagation paths.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Marine
Guangzhong Liu, Zhenting Chen, Jiahao Zhou
Summary: The crack propagating behavior of a stiffened plate under tensile and bending displacement loads is studied using the extended finite element method (XFEM). The residual ultimate strength of stiffened plates with a central crack is analyzed with ABAQUS software. The validity of the grid is confirmed by a plate with a central crack, and the numerical method is validated by comparing fatigue crack growth rates from the extended finite element with experimental values of the round compact tension specimen (RCT). The results show that the ultimate strength of the stiffened plates is reduced by tensile and bending loads, with the bottom plate and stiffener being destroyed sequentially through crack propagation. Increasing the height of the stiffener enhances crack resistance, thereby restraining the central crack growth of the stiffened plates.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Civil
Ming Li, Hualin Fan
Summary: The paper investigates the free vibration behaviors of novel hierarchical Isogrid stiffened cylinders (HISCs) through experiments and simulations. A nondestructive vibration correlation technique (VCT) is proposed to evaluate composite properties of HISC affected by manufacturing process, redefining fiber volume fraction. The hierarchical structure's effect on fundamental frequency is studied, along with advantages over Isogrid stiffened cylinder (ISC) for optimal design reference.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Mechanical
Yiming Chen, Dongqi An, Chao Zhou, Yihao Li, Jie Xu, Rui Li
Summary: Analytical free vibration solutions of rectangular edge-cracked thin plates are obtained using the finite integral transform (FIT) method. A new scheme based on FIT is established to analyze the free vibration characteristics of these plates with different boundary conditions. The study decomposes the edge-cracked plate into four subdomains and applies double cosine FIT to obtain the relationship between the transformed modal deflections and unknowns. The natural frequencies and unknowns are determined by solving the established algebraic equations, and the modal deflections are obtained by substituting the unknowns into the inverse transforms. Comprehensive benchmark results and a parametric study are presented to validate the effectiveness of the method.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Samah Maoudj, Rachid Tiberkak, Mohamed Essedik Lazar, Madjid Ezzraimi, Mourad Bachene, Said Rechak
Summary: This article investigates the free vibration behavior of cracked nanocomposite plates and examines the impact of different distribution patterns. The effective elastic modulus is calculated using the modified finite element method, and the mass density and Poisson's ratio are determined using the rule of mixture. A parametric study is conducted to analyze the natural frequencies of the plates under different boundary conditions and distribution patterns.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Mechanical
Prakash Ranjan Sahoo, Manoranjan Barik
Summary: This study investigates the free vibration characteristics of curved plates and the influence of stiffeners on the vibration, as well as the effects of stiffener types, shapes, and orientations on vibration frequencies. Results show that the I-beam eccentric stiffener has higher non-dimensional frequencies under clamped conditions, while radially attached stiffeners have a more pronounced impact on the vibration frequencies of circular and elliptical plates.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2021)
Article
Mathematics, Applied
Jian Xue, Lihua Chen, Yue Sun, Wei Zhang
Summary: In this paper, a new cracked stiffener model is proposed to investigate the free vibration of plates with cracked stiffeners. The crack parameters are considered and the Ritz method is used for calculation. The validity and accuracy of the present solutions are verified through comparison with finite element results.
ADVANCES IN APPLIED MATHEMATICS AND MECHANICS
(2023)
Article
Mechanics
Saman Sadripour, Ramazan-Ali Jafari-Talookolaei, Abdollah Malekjafarian
Summary: This paper presents a numerical solution for analyzing the free vibration of delaminated soft core sandwich plates. The delaminated sandwich plate was modeled as six interconnected sub-plates, with the delamination serving as their boundaries. The study concludes that the developed elements and proposed procedure are accurate and efficient, as demonstrated by a comparative analysis with previous research.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Mechanics
Atri Nath, Aninda Pal, Prabhakar Akurati, Ritwik Ghoshal, Nilanjan Mitra
Summary: Denticle microstructures in shark skin have been found to significantly influence the natural frequency of free vibration, without altering the mode shapes. The reduction in spacing between denticles further reduces the natural frequency. Understanding these effects of wettability alterations on free vibration response is important for efficient design.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Engineering, Mechanical
Can Gonenli, Hasan Ozturk, Oguzhan Das
Summary: This study investigates the effect of cracks on the free vibration of a large deflected cantilever plate by establishing a mathematical model and using finite element analysis. The results show that different load parameters cause different mode shapes, which in turn affect the crack effect.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Multidisciplinary
Oguzhan Das
Summary: This study examines the influence of cut-out shape on the fundamental frequency and harmonic response of thin composite circular plates. The results show that the shape of the cut-out significantly affects the vibrational behavior of the circular structure, irrespective of its fiber orientation.
JOURNAL OF ENGINEERING RESEARCH
(2022)
Article
Engineering, Mechanical
Can Gonenli
Summary: This study investigates the weak points of engineering structures by studying the damage behavior, and proposes reverse engineering methods for damage detection.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
O. Das, U. Aybarc, Y. Yucel Ozturk, B. Goren Kiral, H. Ozturk, Z. Kiral, B. Uyulgan
Summary: This study investigates the impact of potassium feldspar on the castability and mechanical properties of aluminum-potassium feldspar metal matrix composites. The study considers different additive ratios of potassium feldspar to determine its effect on the manufactured material. The preliminary results show that potassium feldspar has a positive impact on the mechanical properties, making it a promising additive for aluminum metal matrix composites.
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK
(2023)
Review
Multidisciplinary Sciences
Oguzhan Das, Duygu Bagci Das, Derya Birant
Summary: With the introduction of the concept of Industry 4.0, intelligent fault diagnosis and prognosis (IFDP) models based on artificial intelligence have gained attention in the rotating machinery community. Various challenges such as model assessment, real-world suitability, fault-specific model development, compound fault existence, domain adaptability, data source, data acquisition, data fusion, algorithm selection, and optimization have arisen. This study presents a comprehensive review of IFDP procedures for rotating machinery, considering all these challenges, and discusses fault analysis strategies, data sources, data fusion techniques, and machine learning techniques for different components.
Article
Engineering, Civil
Oguzhan Das, Hasan Ozturk, Can Gonenli
Summary: This study investigates the free vibration and buckling analyses of isotropic curved plate structures fixed at all ends using the Kirchhoff-Love Plate Theory and Finite Element Method. The effects of various radii of curvatures and aspect ratio on the natural frequency and critical buckling load values are investigated. A computer code based on finite element analysis is developed and the results are validated against ANSYS R18.2 results.
STRUCTURAL ENGINEERING AND MECHANICS
(2023)
Article
Construction & Building Technology
Oguzhan Das, Can Gonenli, Duygu Bagci Das
Summary: Localizing damages is crucial for monitoring the health of structures. Non-destructive methods are preferred due to their ability to locate damage without affecting structural integrity, but they have drawbacks in terms of detection abilities, time consumption, cost, and requirements. Artificial intelligence techniques can overcome these issues and provide an effective damage detection model.
STEEL AND COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Oguzhan Das
Summary: Machine learning models have been widely used in engineering applications for decades, such as structural health monitoring and optimization of engineering systems or structures. This study presents the prediction of natural frequencies of beam structures using different regression machine learning models, and compares their performance.
SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI
(2023)
Article
Engineering, Multidisciplinary
Can Gonenli, Hasan Ozturk, Oguzhan Das
Summary: This study investigates the effect of large deflection on the natural frequency of pre-stressed laminated composite plates with different lamination orientations. The non-linear deflection curve of the large deflected laminated plate is obtained and the deflection is limited to 25% of the plate length. A finite element analysis approach is used to model the thin curved plate. Four different lamination orientations are examined and the natural frequency parameter is compared with ANSYS for validation.
SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI
(2022)
Article
Engineering, Multidisciplinary
Can Gonenli, Hasan Ozturk, Oguzhan Das
Summary: This study investigates the free vibration analysis of a cantilever isotropic thin plate using finite element method and deflection equation, examining the effects of load parameter on natural frequency and mode shapes. The results indicate that the load parameter changes the mode shapes of the plate structure.
PAMUKKALE UNIVERSITY JOURNAL OF ENGINEERING SCIENCES-PAMUKKALE UNIVERSITESI MUHENDISLIK BILIMLERI DERGISI
(2022)
Article
Engineering, Civil
Can Gonenli, Oguzhan Das
Summary: This study investigates the free vibration analysis of curved laminated composite plates with end-to-end decomposition, utilizing two levels of decomposition and natural frequency ratios to study the effects on the vibration characteristics. The research concludes that the impact of end-to-end decomposition on natural frequencies varies based on the level of decomposition, stacking order, and bending regions of the mode shapes.
LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES
(2021)
