Thin-Walled Structures最新文献_第7页

High-velocity impact characteristics of 3D auxetic composite cylindrical shell panels: Theory and experiment 三维复合材料圆柱壳板的高速冲击特性：理论与实验

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-10 DOI: 10.1016/j.tws.2024.112648

Hui Li , Yichen Deng , Zhengwei Zhang , Junxue Hou , Jin Zhou , Haizhou Wang , Haiyang Zhang , Xiangping Wang , Zhongwei Guan

{"title":"High-velocity impact characteristics of 3D auxetic composite cylindrical shell panels: Theory and experiment","authors":"Hui Li , Yichen Deng , Zhengwei Zhang , Junxue Hou , Jin Zhou , Haizhou Wang , Haiyang Zhang , Xiangping Wang , Zhongwei Guan","doi":"10.1016/j.tws.2024.112648","DOIUrl":"10.1016/j.tws.2024.112648","url":null,"abstract":"<div><div>The high-velocity impact characteristics of 3D auxetic composite cylindrical shell panels are studied theoretically and experimentally. First, to predict the high-velocity impact parameters, including the residual velocity of the projectile, the energy absorption, and the ballistic limit, an analytical model of such structures consisting of two fiber/resin skins, two adhesive films, and a 3D auxetic lattice core is proposed, in which Reddy's higher-order shear deformation theory is employed to define the displacement variables. After taking into account the equivalent material properties of the core and various failure modes, energy absorption mechanisms, strain rate effect, and impact damage evolution issues of the constituent elements, governing equations and solutions are successfully obtained. To validate the model developed, detailed high-velocity impact tests with different initial velocities are then performed on such shell panel specimens with nylon and metal auxetic lattice cores fabricated by 3D printing technology. Finally, the influences of key geometric parameters of the core on impact properties are investigated, with some important design recommendations being refined to improve the impact resistance and energy absorption capabilities of the studied structure.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112648"},"PeriodicalIF":5.7,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757473","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

Thermally induced vibration of photovoltaic honeycomb-based-thermoelectric hybrid device 光伏蜂窝热电混合装置的热激振动

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-09 DOI: 10.1016/j.tws.2024.112692

C. Liu , C. Ren , S. Liu , W.J. Li , Y.J. Cui , K.F. Wang , B.L. Wang

{"title":"Thermally induced vibration of photovoltaic honeycomb-based-thermoelectric hybrid device","authors":"C. Liu , C. Ren , S. Liu , W.J. Li , Y.J. Cui , K.F. Wang , B.L. Wang","doi":"10.1016/j.tws.2024.112692","DOIUrl":"10.1016/j.tws.2024.112692","url":null,"abstract":"<div><div>This paper presents a comprehensive investigation of thermally induced vibration (TIV) of elastically constrained photovoltaic honeycomb-based-thermoelectric hybrid device under space thermal environment. Based on four-variable refined quasi-3D higher-order theory as well as virtual boundary spring technique, the equation of motion of the hybrid device is derived by using Lagrange equation. The nonlinear temperature profile is obtained via finite difference scheme and the TIV responses are solved by employing Newmark approach. The effects of boundary condition, size of honeycomb cell, damping effect, thickness of insulation layer and radius of curvature on TIV of the hybrid device are studied. Results show that the TIV response of the hybrid device can be greatly weakened by replacing the dense thermoelectric leg with honeycomb-based thermoelectric leg. Designing the honeycomb cell as re-entrant architecture possesses a better suppression effect on TIV response. The amplitude of TIV reduces with increasing the thickness-length ratio and decreasing the height-length ratio of honeycomb cell. A larger thickness of insulation layer can weaken the TIV response. The oscillation of TIV response can be eliminated by fabricating hybrid device as circular cylindrical and hyperbolic parabolic shallow shells. The stiffer the boundary conditions, the less prone to TIV behavior of the hybrid device. The introduction of damping effect can suppress TIV response, but it simultaneously causes the occurrence of thermal snap. In general, the research provides several design references to weaken the TIV response of the hybrid device under space heat flux.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"207 ","pages":"Article 112692"},"PeriodicalIF":5.7,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757276","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

Simultaneous enhancement in deposition efficiency and nano-scale precipitation of high-strength AZ31 Mg alloy via water cooling assisted wire-arc directed energy deposition 通过水冷辅助线弧定向能沉积同时提高高强度 AZ31 镁合金的沉积效率和纳米级沉淀

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-09 DOI: 10.1016/j.tws.2024.112689

Pinkui Ma , Can Wang , Hailong Jia , Yihang Yang , Min Zha

{"title":"Simultaneous enhancement in deposition efficiency and nano-scale precipitation of high-strength AZ31 Mg alloy via water cooling assisted wire-arc directed energy deposition","authors":"Pinkui Ma , Can Wang , Hailong Jia , Yihang Yang , Min Zha","doi":"10.1016/j.tws.2024.112689","DOIUrl":"10.1016/j.tws.2024.112689","url":null,"abstract":"<div><div>The inter-layer cooling is crucial for adjusting microstructures and mechanical properties of wire-arc directed energy deposition (WA-DED) Mg alloys. In this study, AZ31 Mg alloy thin-wall components have been fabricated via WA-DED under different cooling modes: natural air cooling (AC) and side wall water cooling (WC) by an innovative WC equipment that provides water cooling on both sides of thin-wall components. The temperature variation during deposition process, microstructures and mechanical properties of AZ31 thin-wall components under different cooling modes (AC and WC components) have been systematically compared and analyzed. It shows that for thin-wall components with the same total deposition layers, the deposition time for the WC component is significantly reduced, i.e., the deposition efficiency of the WC mode has been much improved. Compared with the AC component, the size of both equiaxed and columnar grains in the WC component is finer, i.e., the average grain sizes of top regions in AC and WC components are ∼106.8 μm and ∼74.3 μm, respectively. Apart from (sub)micro-scale secondary phase particles formed during the solidification stage of molten pool, a large number of nano-sized precipitates have formed in the WC component because the cooling rate of molten pool of WC component is large enough in the post-solidification stage, while the AC component contains almost no nano-scale precipitates. Accordingly, the WC component exhibits excellent tensile properties, i.e., the yield strength and ultimate tensile strength along the build direction are ∼170 MPa and ∼250 MPa, respectively. At the same time, the elongation reaches 9.3 %. This study provides references for enhancing the deposition efficiency and improving mechanical properties of Mg alloy components.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112689"},"PeriodicalIF":5.7,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663931","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

A systematical investigation on the impact of coupling crystal orientations on vibration characteristics of a single crystal superalloy cooling turbine blade 耦合晶体取向对单晶超合金冷却涡轮叶片振动特性影响的系统研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-09 DOI: 10.1016/j.tws.2024.112690

H.T. Li, X.M. Wang, H. Cheng, S.Y. Sun, W.Z. Yang

{"title":"A systematical investigation on the impact of coupling crystal orientations on vibration characteristics of a single crystal superalloy cooling turbine blade","authors":"H.T. Li, X.M. Wang, H. Cheng, S.Y. Sun, W.Z. Yang","doi":"10.1016/j.tws.2024.112690","DOIUrl":"10.1016/j.tws.2024.112690","url":null,"abstract":"<div><div>Revealing the dispersion mechanism of vibration characteristic is significant for turbine blade that is one of the most important hot components of aero-engine. Thus, the aim of this article is to systematically address the influence of primary and secondary orientation deviations on the dynamic responses of a single crystal blade by theoretical analysis in combination with finite element numerical calculation. Besides, the relationship between the crystal orientation in engineering and material science is clarified by a mathematical approach. Primary orientations characterized by two deviation angles, each having 16 directions and secondary orientations with 11 deviation angles are defined by three angles measured by the Laue method. Good agreement on variation of structural eigenfrequency for the first bending or torsional mode is attained between theory analysis and numerical calculation. Numerical results show that the primary orientation deviation direction could cause significant dispersion of the natural frequencies for low and high order modes. The increasing deviation angle widens the dispersion, with the maximum variation ratio of 5.62% for the torsional mode. Importantly, the conjunction with the secondary orientation could further changes the dispersion of the natural frequencies, and the maximum variation of 6.5% is achieved for the torsional mode. This research may provide new perspectives for substantially improving the resonance margin of single crystal turbine blades, with potential applications in preventing high cycle fatigue failure, which is very meaningful to guide the design of the aero-engine.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112690"},"PeriodicalIF":5.7,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663885","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

Plastic mechanism models for use in DSM localised loading design of hat sections 用于帽子截面 DSM 局部加载设计的塑性机理模型

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-08 DOI: 10.1016/j.tws.2024.112683

Zhehang Chen, Cao Hung Pham, Gregory J. Hancock

引用次数: 0

Microstructure and material properties of 3D-printed bimetallic steels 三维打印双金属钢的微观结构和材料特性

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-08 DOI: 10.1016/j.tws.2024.112688

Yue Yuan , Bin Zeng , Hanbin Ge , Chun-Lin Wang

{"title":"Microstructure and material properties of 3D-printed bimetallic steels","authors":"Yue Yuan , Bin Zeng , Hanbin Ge , Chun-Lin Wang","doi":"10.1016/j.tws.2024.112688","DOIUrl":"10.1016/j.tws.2024.112688","url":null,"abstract":"<div><div>Corroded steel components can be repaired by laser 3D printing technology. However, studies on the mechanical behaviour of repaired areas composed of a substrate and deposited material are still limited. In this study, 316 L stainless steel powder was deposited on Q355B steel plates through 3D laser printing technology to form bimetallic steel plates. Uniaxial tensile tests were conducted on Q355B steel coupons, laser 3D-printed 316 L stainless steel coupons, and bimetallic steel coupons. The test results revealed that ductile fracture occurred in the bimetallic steel coupons. The mechanical properties of bimetallic steel are considerably correlated with the properties of the cladding layer and substrate. During the loading process, the axial strain of the bimetallic steel coupons was uniformly distributed along the thickness direction, indicating that the substrate and cladding materials maintained excellent cooperative deformation. Bending tests and scanning electron microscopy observations indicate that a reliable and robust metallurgical bond is established at the interface between the substrate and the cladding layer. The interface area can be divided into the cladding layer, the carburising zone, the decarburised zone, and the Q355B substrate. The microhardness results indicate a considerable increase in the hardness of the carburised layer, which enhances the tensile strength of the bimetallic steel. On the basis of the experimental results, a three-stage model for predicting the stress‒strain curve of bimetallic steel was established.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112688"},"PeriodicalIF":5.7,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704978","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

Vibration suppressing study of a simplified floating raft system by mixing using a nonlinear connecting intercalary plate and connecting nonlinear oscillators 通过混合使用非线性连接插板和连接非线性振荡器对简化浮筏系统进行振动抑制研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-08 DOI: 10.1016/j.tws.2024.112686

Qingchuan Zhan , Yilin Chen , Yuhao Zhao , Mingfei Chen , Rongshen Guo

{"title":"Vibration suppressing study of a simplified floating raft system by mixing using a nonlinear connecting intercalary plate and connecting nonlinear oscillators","authors":"Qingchuan Zhan , Yilin Chen , Yuhao Zhao , Mingfei Chen , Rongshen Guo","doi":"10.1016/j.tws.2024.112686","DOIUrl":"10.1016/j.tws.2024.112686","url":null,"abstract":"<div><div>To study the potential application of the mixing nonlinear vibration suppression of the floating raft system, a hybrid vibration control model of the simplified floating raft system with the nonlinear connecting intercalary plate (NCIP) and connecting nonlinear oscillators (CNOs) is established. Based on the correct dynamic behavior of the simplified floating raft system with the NCIP and CNOs, the vibration-suppressing characteristics and vibration-suppressing effect of the simplified floating raft system by mixing using the NCIP and CNOs are deeply studied and discussed. It can be found that the mixing use of the NCIP and CNOs can combine their advantages in an attractive way. The working states of the mixing use of the NCIP and CNOs are divided into linear and non-linear multiple frequency bands synchronously suppressing states, where the vibration island phenomenon is a sign of the NCIP and CNOs work on the non-linear state. Besides, the vibration of the simplified floating raft system under resonance regions can be suppressed at an attractive level, where the best vibration-suppressing ratios for single resonance regions and multiple resonance regions of the simplified floating raft system can be reached by selecting suitable stiffness parameter combinations of the NCIP and CNOs. Overall, the global vibration of the simplified floating raft system within a targeted frequency band can be suppressed synchronously and effectively by reasonable mixing use of the NCIP and CNOs, which play a potential role in the engineering application of strengthening the vibration-suppressing effect of floating raft systems in marine engineering.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112686"},"PeriodicalIF":5.7,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663934","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

Finite Tube Method for buckling analysis of tubular members using Fourier-approximation for the displacements 利用傅立叶位移近似法进行管状构件屈曲分析的有限管法

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-08 DOI: 10.1016/j.tws.2024.112672

Sándor Ádány , Benjamin W. Schafer

{"title":"Finite Tube Method for buckling analysis of tubular members using Fourier-approximation for the displacements","authors":"Sándor Ádány , Benjamin W. Schafer","doi":"10.1016/j.tws.2024.112672","DOIUrl":"10.1016/j.tws.2024.112672","url":null,"abstract":"<div><div>In this paper an efficient numerical method for the static analysis of cylindrical tubes is introduced. The method is designed for the linear buckling analysis of wind turbine support towers which are, most typically, built up from conical and/or cylindrical cans. Accordingly, the developed method uses cylindrical tube segments as elementary building blocks, along with specialized shape functions, and is named the Finite Tube Method. Within a tube segment the displacements are approximated by two-dimensional Fourier series. The curved nature of the surface is directly considered in the kinematic equations. The segments are joined and/or supported to the ground by constraint equations or by elastic links. In the current implementation internal stresses are determined in a simplified way: the circumferential stress distributions are calculated from the internal forces/moment by classic strength of material formulae, while the longitudinal distribution within each segment is quadratic. The considered internal forces/moments are: normal force, shear force, bending moment, and torsional moment. The internal forces can be arbitrarily combined. In the paper the underlying derivations are briefly summarized, then the method is demonstrated and validated by numerical examples, comparing the results to analytical and alternative numerical solutions. The authors are actively developing the method and will provide future work on utilization of the method for buckling mode identification and decomposition, as well as practical advancements to make the method a useful tool in the engineering design and analysis of wind turbine support towers.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112672"},"PeriodicalIF":5.7,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663886","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

Localized stochastic dynamic solution for laminated coupled open conical-cylindrical cabin system based on the condensation method 基于凝结法的层状耦合开放式圆锥-圆柱机舱系统局部随机动态解法

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-08 DOI: 10.1016/j.tws.2024.112691

Chenchen Guo , Qingshan Wang , Tao Liu , Bin Qin

{"title":"Localized stochastic dynamic solution for laminated coupled open conical-cylindrical cabin system based on the condensation method","authors":"Chenchen Guo , Qingshan Wang , Tao Liu , Bin Qin","doi":"10.1016/j.tws.2024.112691","DOIUrl":"10.1016/j.tws.2024.112691","url":null,"abstract":"<div><div>This paper proposed a technical solution for quickly and accurately solving the stochastic dynamic characteristics of laminated coupled open conical-cylindrical cabin system. On the basic of first-order shear deformation theory (FSDT), the two-dimensional spectral Chebyshev method was introduced to obtain a unified dynamic matrix that included laminated conical and cylindrical panels. The middle part of the cabin was selected as the target substructure, while the precise dynamic condensation theory was used as a tool to establish a local dynamic analysis model of the cabin system based on comprehensive consideration of complex boundary conditions, coupling conditions, random load excitation and other factors. From a numerical analysis perspective, the local-level dynamic responses obtained from the model were validated to match well with the global-level results from the finite element method. Based on this numerical validation, a dynamic parametric analysis scheme was proposed, focusing on the local dynamic characteristics of the target substructure. This scheme analyzed the impact of the structural parameters of the middle part of cabin on the dynamic behaviors of the cabin system, providing technical guidance for the design optimization of the cabin system in engineering applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112691"},"PeriodicalIF":5.7,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142661814","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

A simple but accurate FEM for lateral-torsional buckling loads of mono-symmetric thin-walled beams considering pre-buckling effects 考虑预屈曲效应的单对称薄壁梁侧扭屈曲荷载的简单而精确的有限元分析

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-11-07 DOI: 10.1016/j.tws.2024.112676

Fengping Zhang, Moon-Young Kim

{"title":"A simple but accurate FEM for lateral-torsional buckling loads of mono-symmetric thin-walled beams considering pre-buckling effects","authors":"Fengping Zhang, Moon-Young Kim","doi":"10.1016/j.tws.2024.112676","DOIUrl":"10.1016/j.tws.2024.112676","url":null,"abstract":"<div><div>This study intends to present a simple but accurate FE buckling analysis procedure in order to determine lateral-torsional buckling (LTB) loads of mono-symmetric steel beams considering pre-buckling effects. For this, a nonlinear co-rotational FEM for lateral-torsional post-buckling of a thin-walled beam system with non-symmetric cross sections is summarized in which all displacement parameters are defined at centroid. After that, an iterative LTB analysis method is newly proposed with consideration of in-plane deformations due to external loads. Through numerical examples, it is demonstrated that buckling solutions by this method are very well matched with those by lateral post-buckling analysis of the steel beam with lateral imperfections. Finally, numerical results on LTB of simple/cantilever beams under conservative moments, simple beams under gradient moments, simple beams under eccentric compression, a cantilever beam with an un-symmetric channel section, and a cantilever right-angle frame with I-section are presented using conventional LTB, iterative LTB, and post-buckling analysis methods.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112676"},"PeriodicalIF":5.7,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757472","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