Thin-Walled Structures最新文献_第9页

Enhancing the interlaminar toughness and impact resistance of CFRP using MWCNTs and core-shell rubber synergistic strategy

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-04 DOI: 10.1016/j.tws.2025.113146

Guojun Zhao, Xiaoyu Zhang, Wei Qiang, Xin Zhang

{"title":"Enhancing the interlaminar toughness and impact resistance of CFRP using MWCNTs and core-shell rubber synergistic strategy","authors":"Guojun Zhao, Xiaoyu Zhang, Wei Qiang, Xin Zhang","doi":"10.1016/j.tws.2025.113146","DOIUrl":"10.1016/j.tws.2025.113146","url":null,"abstract":"<div><div>Enhancing the toughness and impact resistance of composite materials is becoming increasingly important. This study investigates the effects of multi-walled carbon nanotubes (MWCNTs) and core-shell rubber (CSR) particles on the mechanical properties and interlaminar fracture toughness of epoxy resin-based carbon fiber-reinforced polymer (CFRP) composites. The synergistic toughening mechanisms are explored through scanning electron microscopy and non-destructive testing. Results show that incorporating CSR individually reduces the modulus and maximum stress of epoxy resin but significantly enhances its fracture toughness by 82% when it is hybrid with MWCNTs synergistically. The hybrid modification of MWCNTs and CSR in CFRP laminates exhibited superior interlaminar toughening efficiency, with values increasing by 149% in mode I fracture and 80% in mode II fracture. These results demonstrate that CSR activates more MWCNTs in the resin, significantly improving the interlaminar fracture toughness of CFRP laminates. Furthermore, the hybrid-modified CFRP laminates effectively mitigated barely visible impact damage (5 J) and maintained damage resistance under higher energy impacts (up to 20 J), demonstrating enhanced impact tolerance, and showing remarkable resistance to damage evolution.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113146"},"PeriodicalIF":5.7,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anchorage strength of stainless steel T-bolt in square concrete-filled stainless steel tubes 不锈钢 T 型螺栓在方形混凝土填充不锈钢管中的锚固强度

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-04 DOI: 10.1016/j.tws.2025.113155

Ying-Lei Li , Min Lei , Xiao-Ling Zhao

引用次数: 0

Compression-bending behavior of thin-walled prestressed concrete tower with horizontal joint for wind turbines: Experimental study and calculation model

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-04 DOI: 10.1016/j.tws.2025.113154

Wei Ren , Xu-Hong Zhou , Ran Deng , Shou-Zhen Li , Yu-Hang Wang

{"title":"Compression-bending behavior of thin-walled prestressed concrete tower with horizontal joint for wind turbines: Experimental study and calculation model","authors":"Wei Ren , Xu-Hong Zhou , Ran Deng , Shou-Zhen Li , Yu-Hang Wang","doi":"10.1016/j.tws.2025.113154","DOIUrl":"10.1016/j.tws.2025.113154","url":null,"abstract":"<div><div>This paper presents an experimental and analytical study on the compression-bending behavior of prestressed concrete towers, considering the effect of horizontal joints and prestress. Since the horizontal joint between the concrete tower and the foundation are not reinforced with continuous rebars, but are merely connected through prestressing force, there is a possibility of joint opening under the large bending moment. Five prestressed concrete tower specimens were tested under compression-bending loads. The key parameter in the experiment was the prestress ratio. The results showed that the increase of prestress can significantly constraint the opening of horizontal joints and improve the ultimate capacity of the tower, but the ductility and self-centering performance are reduced. Compared to the specimen with the lowest prestress ratio 0.11, the specimen with the highest prestress ratio 0.44 showed an increase of 84.56 % on the ultimate capacity, but showed a reduction of 79.84 % on the ductility. The accuracy of two commonly used design methods were evaluated based on test results. The relative errors were 48.6 % and 19.3 %, respectively, which showed low accuracy and applicability. Finally, based on the equivalent plastic hinge model, an analytical study was conducted. A theoretical model of the load-displacement curve was presented and the theoretical results were compared with the test results, showing a relative error of 4.2 %. The result indicated that the theoretical model can effectively predict the compression-bending capacity. In general, the revealed compression-bending mechanism and the proposed theoretical model can provide a guidance for the engineering design of prestressed concrete towers.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113154"},"PeriodicalIF":5.7,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic frequency analysis of rotating double-layer conical thin shells coupled with semi re-entrant zero Poisson's ratio honeycomb sandwich annular plates

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-03 DOI: 10.1016/j.tws.2025.113136

Yongqiang Li

{"title":"Dynamic frequency analysis of rotating double-layer conical thin shells coupled with semi re-entrant zero Poisson's ratio honeycomb sandwich annular plates","authors":"Yongqiang Li","doi":"10.1016/j.tws.2025.113136","DOIUrl":"10.1016/j.tws.2025.113136","url":null,"abstract":"<div><div>This paper proposes a computational method based on the substructure synthesis approach to analyze the dynamic frequency of rotating double-layer conical thin shells coupled with semi re-entrant (SER) zero Poisson's ratio (ZPR) honeycomb sandwich annular plates (HSAP). The double-layer conical shell is divided into several conical shell substructures according to the position of the annular plate. The dynamic models of the conical shell and annular plate substructures are established based on the Flügge and Donnell-Mushtari thin shell/plate theories, incorporating centrifugal and Coriolis inertia forces. The displacements of the substructures are expressed as a combination of power series and Fourier series. All substructures are assembled using the continuity conditions for eight displacements and four forces at the coupling interfaces of adjacent substructures, and the global free vibration equation of the structure is constructed with the boundary conditions at the ends of the conical shell. The validity of the proposed method is verified through two examples. First, the results obtained using the proposed method are compared with those of the wave based method by converting the conical shell into a cylindrical shell and setting the rotational speed to zero. Second, the calculated dynamic frequencies of the rotating double-layer conical thin shells coupled with SER ZPR HSAP (SZHSAP) are compared with those obtained via the finite element method. Finally, the effects of various boundary conditions, rotational speeds, and geometric parameters of the conical shell and annular plate on the dynamic frequencies of the coupled structure are analyzed.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113136"},"PeriodicalIF":5.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-mechanical response of axisymmetric cylindrical shells made of FGM subjected to cooling shock

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-03 DOI: 10.1016/j.tws.2025.113145

R. Ansari , A. Talebian , M. Zargar Ershadi

{"title":"Thermo-mechanical response of axisymmetric cylindrical shells made of FGM subjected to cooling shock","authors":"R. Ansari , A. Talebian , M. Zargar Ershadi","doi":"10.1016/j.tws.2025.113145","DOIUrl":"10.1016/j.tws.2025.113145","url":null,"abstract":"<div><div>This investigation presents a comprehensive analysis of the thermomechanical behavior of functionally graded (FG) cylindrical shells subjected to cooling shock employing a novel solution methodology. Utilizing the first-order shear deformation theory, the variational differential quadrature (VDQ) approach is employed to solve the governing equation, which are derived using Hamilton's principle, then complemented by the Newmark integration technique for the time derivatives. The generalized differential quadrature (GDQ) method is employed to solve the one-dimensional transient heat conduction problem. The study systematically investigates the influences of temperature differences, boundary conditions (BCs), power law indices, and thermal load rapidity time on the vibrations and stress distributions across various surfaces of the cylindrical shell. Numerical results demonstrate that significant temperature variations lead to increased vibrational amplitudes and stress concentrations, highlighting the critical role of BCs and material properties in the dynamic behavior of FG cylindrical shells.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113145"},"PeriodicalIF":5.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrodynamic characteristics of dual-layered thin-walled concentric segmented structures

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-02 DOI: 10.1016/j.tws.2025.113089

Zhiqun Guo , Jianming Miao , Zhenfeng Zhai

{"title":"Hydrodynamic characteristics of dual-layered thin-walled concentric segmented structures","authors":"Zhiqun Guo , Jianming Miao , Zhenfeng Zhai","doi":"10.1016/j.tws.2025.113089","DOIUrl":"10.1016/j.tws.2025.113089","url":null,"abstract":"<div><div>Segmented arc structures are commonly used in marine engineering but are often vulnerable to wave penetration through their gaps. This study examines the feasibility of adding a low-cost, small breakwater behind a segmented structure to mitigate this issue effectively. An analytical model based on linear potential theory is developed to understand water wave interactions with a cylindrical and segmented arc-shaped dual-layered thin-walled structure. Using eigenfunction matching and separation of variables, the unknown function is expanded within a Chebyshev polynomial framework. With comprehensive boundary condition considerations, the integral equation is transformed into a series of algebraic equations, which are solved to determine the unknown function. Model accuracy is verified by simplifying the model and comparing it with published results. The hydrodynamic response, including wave forces and free surface elevation, is analyzed. Numerical results indicate that a small porous breakwater effectively reduces wave load on the inner cylinder and smooths wave heights within the structure and at the openings, facilitating safe ship passage and operation. This study provides practical guidance and valuable reference for engineering applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113089"},"PeriodicalIF":5.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The ballistic response and failure mechanism of glass-fiber/epoxy laminates under normal and oblique impact loading by glass projectile

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-02 DOI: 10.1016/j.tws.2025.113138

Qiran Sun , Hailiang Sun , Taiping Guo , Qixuan Su , Haoran Lu , Yuxin Sun

{"title":"The ballistic response and failure mechanism of glass-fiber/epoxy laminates under normal and oblique impact loading by glass projectile","authors":"Qiran Sun , Hailiang Sun , Taiping Guo , Qixuan Su , Haoran Lu , Yuxin Sun","doi":"10.1016/j.tws.2025.113138","DOIUrl":"10.1016/j.tws.2025.113138","url":null,"abstract":"<div><div>A comprehensive understanding of the ballistic performance of glass fiber reinforced polymer (GFRP) under impact is crucial to its adequate application in aerospace and other fields. However, studies regarding oblique ballistic impact are limited and almost all the projectiles used are made of metal. In this study, serial high-velocity impact experiments using glass projectiles are performed with an obliquity of up to 60º. To investigate the ballistic response and impact-induced damage mechanism of GFRP laminate, truncated cone projectiles made by K9 glass and 3.6-mm-thick plain weave glass/epoxy composites are manufactured. The fracture and fragmentation of glass projectiles during the high-velocity impact are observed, and the perforation results and damage patterns of GFRP targets are presented. Additionally, the transition of glass fiber failure mechanism domination during penetration with the variations of impact velocity and incident angle is validated and summarized. Unlike rigid projectile impacts, a distinct decline trend regardless of the incident angle (IA) is confirmed by the quantitative correlation between the delamination damage area and projectile velocity. Furthermore, experimental result demonstrates that glass fibers on the rear surface fails early before the projectile arrives under large IA impact. Finally, a modified specific-kinetic-energy criterion, including the incident angle effect, is proposed to predict the ballistic perforation of GFRP laminates under glass projectile impact.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113138"},"PeriodicalIF":5.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Size-dependent behaviour of in-plane bi-directional functionally graded porous microplates with variable thickness based on the modified strain gradient theory and IGA

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-02 DOI: 10.1016/j.tws.2025.113144

Saeed Mirzaei , Mehrdad Hejazi , Reza Ansari

{"title":"Size-dependent behaviour of in-plane bi-directional functionally graded porous microplates with variable thickness based on the modified strain gradient theory and IGA","authors":"Saeed Mirzaei , Mehrdad Hejazi , Reza Ansari","doi":"10.1016/j.tws.2025.113144","DOIUrl":"10.1016/j.tws.2025.113144","url":null,"abstract":"<div><div>In this paper, the isogeometric analysis (IGA) is extended to study the size-dependent behavior of bending, buckling and free vibration of in-plane bi-directional functionally graded porous microplates with variable thickness. In order to capture the effect of size, the modified strain gradient elasticity theory, which has three length scale parameters, is used. Regarding to the third-order shear deformation theory, the equations of motions are derived by using the Hamilton's principle and then are discretized based on the IGA approach. The material properties vary continuously through in-plane directions by employing the rule of mixture and the porosity distribution is considered an even type. The C<sup>2</sup>-continuity requirement can be easily achieved by increasing the order of the non-uniform rational B-spline (NURBS) basis functions larger than two. The influences of the size effect, aspect ratios, boundary conditions, thickness variations, material gradations, and porosity distributions on the deflections, the fundamental natural frequencies, and the buckling load values of the rectangular, circular and elliptical microplates are studied. The obtained results are compared with the previously published studies to show the performance and efficiency of the present research.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113144"},"PeriodicalIF":5.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Local and global buckling prevention design of transformed triangular corrugated plates under shear and bending

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-02 DOI: 10.1016/j.tws.2025.113135

Yanguo Hou , Chenbao Wen , Kuisheng Liu , Jinsong Duan , Haojun Sun , Yanlin Guo

{"title":"Local and global buckling prevention design of transformed triangular corrugated plates under shear and bending","authors":"Yanguo Hou , Chenbao Wen , Kuisheng Liu , Jinsong Duan , Haojun Sun , Yanlin Guo","doi":"10.1016/j.tws.2025.113135","DOIUrl":"10.1016/j.tws.2025.113135","url":null,"abstract":"<div><div>This study investigates the local and global buckling behavior of Transformed Triangular Corrugated Steel Plates (TT-CSP) under bending and shear forces. Theoretical derivations and numerical analyses are employed to establish formulas for the elastic local and global buckling loads. The effects of TT-CSP aspect ratio, fold plate width ratio, TT-CSP thickness, and corrugation folding angle on buckling behavior are examined. A design method for preventing local and global buckling in TT-CSPs is developed based on elastic buckling load and ultimate strength, validated through numerical analyses. The results indicate that the vertical boundaries of TT-CSP do not satisfy the plane assumption, significantly reducing the elastic buckling load and ultimate strength. The width ratio of the main-plate to the sub-plate is identified as the most critical factor affecting the local buckling load. The thickness of TT-CSPs influences shear deformation, with greater thickness leading to a reduction in the local buckling coefficient, whereas corrugation folding angle have a limited impact. Additionally, the limits of the normalized width-to-height ratio for bending are found to be more stringent than those for shear.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113135"},"PeriodicalIF":5.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of residual stress for thin-layered electrolyte co-sintered with porous electrodes applied in solid oxide cells

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-01 DOI: 10.1016/j.tws.2025.113140

Weiqiang Cai , Liusheng Xiao , Tao Deng , Qijie Hang , Baowei Pan , Jinliang Yuan , Chao Xie

{"title":"Analysis of residual stress for thin-layered electrolyte co-sintered with porous electrodes applied in solid oxide cells","authors":"Weiqiang Cai , Liusheng Xiao , Tao Deng , Qijie Hang , Baowei Pan , Jinliang Yuan , Chao Xie","doi":"10.1016/j.tws.2025.113140","DOIUrl":"10.1016/j.tws.2025.113140","url":null,"abstract":"<div><div>In this study, a trans-scale modeling approach, non-contact high-temperature deformation measurement and flattening compression testing technique are developed and applied for co-sintered thin-layered electrolyte with thick porous electrodes, aiming to comprehensively analyze residual stress and sintering deformation with/without flattening force during/after manufacturing process (including the sintering and flattening process). Coefficient of thermal expansion (CTE) and elastic modulus (<em>E</em>) are first predicted by the Molecular Dynamics method, which together with predicted microscopic volume changes along cell length direction are applied in the finite element modeling for macroscale deformation and residual stress prediction. The results show that the current prediction by the varied CTE and <em>E</em> for sintering deformation is improved by 14 % compared to that using constant ones. The application of a flattening force (31 N, determined from the displacement-compressive force curve) can be effective in reducing cambered deformation (a reduction of 20.14 %), but can also lead to a redistribution of the flattening residual stress within the cell. The stress concentration at the corners of the anode and electrolyte layers is heightened, whereas the flattened residual stress in the electrolyte layer region adjacent to the anode side is diminished. Further identification and optimization of the key parameters relating to the sintering process are conducted which reveals that the sintering temperature has the most significant impact on the sintering displacement, while the larger sintered cambered displacement requires a bigger flattening force to achieve the targeted displacement.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113140"},"PeriodicalIF":5.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0