Article
Mechanics
Hoo Min Lee, Gil Ho Yoon
Summary: The study introduces a novel size optimization method to control the buckling mode shape and buckling temperatures of plates by combining finite element simulation and a size optimization scheme, mainly based on the influence of plate thickness.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Feixiang Tang, Fang Dong, Yuzheng Guo, Shaonan Shi, Jize Jiang, Sheng Liu
Summary: This study investigates the buckling and post-buckling problems of size-dependent functionally graded material thin plates using the framework of the Modified Couple Stress Theory. By considering the power-law distribution with scale effects, the post-buckling deflection and critical buckling load of the plates are derived. It is found that the power-law index parameters have a significant influence on the critical buckling displacement, load, and strain energy, while the scale effect parameter has a greater impact. Additionally, the results show that the scale effects increase material stiffness and that the power-law index parameters affect FGM properties.
Article
Engineering, Marine
Zhenkui Wang, C. Guedes Soares
Summary: In this study, a mathematical model is proposed to simulate upheaval buckling of lined subsea pipelines based on nonlinear assumptions and beam theory. Analytical solutions are derived and validated against literature results. The study analyzes the influence of material properties and thickness ratio on post-buckling response, and compares the behavior of the outer pipe and liner in upheaval buckling.
Article
Construction & Building Technology
Wei Li, Jing Dong, Hui Qu, Lanqin Wang, Kun Zhao
Summary: This paper conducts theoretical and numerical studies on the local buckling development of an H-section steel core of buckling restrained brace, revealing the characteristics and influencing factors.
Article
Engineering, Civil
Cong Zeng, Yifei Zhang, Junxian Zhao, Guoshan Xu, Dehong Wang, Tianlin Pan
Summary: A novel PTBRB was proposed and tested for seismic retrofitting of existing T-shaped steel members. The retrofitting scheme effectively increased the axial compression force capacity of the steel members without affecting their elastic stiffness. PTBRB specimens exhibited high ductility and cumulative plastic deformation capacity. Numerical analysis identified the controlled buckling mode and theoretical stability analysis confirmed the reliability of Bleich's theory. The maximum compression capacity of PTBRB was proposed and validated as the seismic fuse function.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
D. M. Li, Ling-Hao Kong, Yi-Cheng Qian
Summary: This study investigates the control of compacting patterns of 2D soft periodic structures using combined loading, exploring the buckling and post-buckling behaviors of finite-size structures under different loading conditions. Representative Compacting Patterns (RCPs) and Critical Points of model transformation Controlled by Loading (CPCL) are identified, offering a new design space for various application fields.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Sergei Khakalo, Jarkko Niiranen
Summary: 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 experimental and computational analysis reveals new findings regarding this classical problem, including characteristic twisting angles associated with mode jumps in buckling and stability loss during the twisting process. The influence of twisting-induced stresses on the buckling response is also investigated.
ENGINEERING STRUCTURES
(2023)
Article
Mechanics
G. Vamsi Krishna, V Narayanamurthy, C. Viswanath
Summary: The buckling performance of thin metallic shells can be enhanced by external wrapping of FRP composite layers. The effectiveness and extent of such FRP strengthening is influenced by the buckling characteristics of the metallic shell. Through numerical studies, it is found that the increase in hoop modulus of the FRP wrap leads to a stepwise increase in load capacity for elastic buckling shells, while an optimal design for plastic buckling shells can be achieved by a minimal increase in longitudinal stiffness of the FRP wrap. Additionally, an increase in longitudinal stiffness of FRP can significantly increase the buckling capacity of plastic buckling shells failing due to axi-symmetric bulging at their ends.
COMPOSITE STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
Chayut Ngamkhanong, Sakdirat Kaewunruen, Charalampos Baniotopoulos
Summary: This study investigates the buckling behavior of interspersed railway tracks subjected to temperature change using 3D finite element modeling. The findings suggest that the interspersed approach may reduce the likelihood of track buckling. These results can be utilized for predicting buckling temperature and inspecting the conditions of interspersed railway tracks.
COMPUTERS & STRUCTURES
(2021)
Article
Engineering, Civil
Robert S. Glauz
Summary: The design of thin-walled cold-formed steel members must consider various forms of buckling. The Direct Strength Method simplifies strength prediction with a common approach utilizing adaptations of the Winter plate buckling formula. Recent modifications to the Direct Strength Method were developed for flexural members not symmetric about the axis of bending, which introduced a new general form to the direct strength equation.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Hoo Min Lee, Kang Kuk Lee, Gil Ho Yoon
Summary: This study aims to achieve the thermal structural stability of composite plate structure by developing a topography optimization method and a size optimization method. The validity of the approach is demonstrated through solving several structural optimization problems and an engineering application on reaction turbine blades.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Ameer Marzok, Haim Waisman
Summary: This paper presents a new approach for the buckling analysis of thin-walled beams using the eXtended Finite Element Method (XFEM). By adding global enrichment functions based on beam theory solutions to a coarse finite element mesh, the performance is enhanced and the number of degrees of freedom is reduced. The XFEM method enables modeling thin-walled beams for buckling analysis using coarse finite element mesh.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Composites
Ozkan Ozbek, Nurettin Furkan Dogan, Omer Yavuz Bozkurt, Ahmet Erklig
Summary: This study investigates the effects of nanoclay particles on the buckling behavior of carbon/Kevlar intraply hybrid composites. The results showed that the introduction of 1wt% nanoclay particles increased the axial and lateral critical buckling loads by 21.12% and 25.33% respectively. However, the inclusion of nanoclay particles with a higher amount than 1wt% led to a decreasing trend in critical loads for both buckling loadings. The failure modes observed were matrix fragmentation and delamination.
POLYMER COMPOSITES
(2023)
Article
Engineering, Mechanical
Chayut Ngamkhanong, Sakdirat Kaewunruen, Charalampos Baniotopoulos
Summary: The stability of railway tracks is crucial for addressing extreme temperature issues, but prolonged use can lead to gradual degradation of the tracks, resulting in poorer stability. Studies considering different ballast fouling conditions indicate that ballast fouling may increase the likelihood of track buckling.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Mechanics
Qianqian Wu, Shaojie Hu, Xiaohan Tang, Xin Liu, Zongbing Chen, Jian Xiong
Summary: The compressive buckling and post-buckling behaviors of J-type composite stiffened panels before and after impact load were investigated through theoretical, numerical, and experimental methods. The load-bearing characteristics of intact and damaged panels were predicted and tested, and the effects of impact damage on panel behavior were revealed through numerical simulation. The study also examined the influence of adhesive layer, lay-up method, and geometric dimensions on structural behavior. The research provides useful suggestions for improving panel performance.
COMPOSITE STRUCTURES
(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)