Thin-Walled Structures最新文献

{"title":"Noise reduction of add-on acoustic black holes with different topologies based on combined Reduced Multibody System Transfer Matrix Method and Elementary Radiators Method","authors":"Jianghong Liu ,&nbsp;Yanni Zhang ,&nbsp;Huiliang Jia ,&nbsp;Xiaoting Rui ,&nbsp;Xiaowei Yan ,&nbsp;Guoping Wang ,&nbsp;Yang Liu","doi":"10.1016/j.tws.2025.113366","DOIUrl":"10.1016/j.tws.2025.113366","url":null,"abstract":"<div><div>Recently, add-on acoustic black holes (ABHs) have received increasing attentions since they would not reduce the thickness/stiffness of the main structure and are flexible to install. Most of the studies, nevertheless, were conducted from the numerical simulation and experimental perspectives. Efficient theoretical computational methods are still lacking, especially for noise characteristics of a host structure with an add-on ABH as a dynamics vibration absorber (DVA), also known as an ABH-DVA. Herein, a theoretical method is proposed for calculating the noise radiation from a combined system formed by a host structure and an ABH-DVA via combining the Reduced Multibody System Transfer Matrix Method (RMSTMM) and the Elementary Radiators Method (ERM) or RMSTMM-ERM. The RMSTMM-ERM is applied to combined systems with ABH-DVAs of three topologies (unilateral, tree-shaped, spiral), and the results are compared with those from two finite element methods (FEMs). It is revealed that for combined systems with ABH-DVA of all three topologies, the RMSTMM-ERM reduces the computation time by &gt;100 times compared with FEMs, while maintaining a high computational accuracy. Besides, remarkable and broadband low-frequency noise reductions are observed for all three ABH-DVAs, especially the spiral one with a deep-subwavelength dimension (<em>λ</em>/200). The vibration spatial distributions and wavenumber spectra with and without the ABH-DVAs are further investigated to disclose the noise reduction mechanisms. This paper provides an efficient and versatile theoretical computation method and design tool for noise studies of ABHs with complex geometries and topologies.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113366"},"PeriodicalIF":5.7,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895559","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}

{"title":"Numerical investigation on the dynamic behavior of thermoplastic fiber-metal laminates subject to confined explosion loading","authors":"Xiangshao Kong ,&nbsp;Zihan Zhu ,&nbsp;Cheng Zheng ,&nbsp;Hu Zhou ,&nbsp;Weiguo Wu","doi":"10.1016/j.tws.2025.113354","DOIUrl":"10.1016/j.tws.2025.113354","url":null,"abstract":"<div><div>A numerical simulation study was conducted to investigate the dynamic response and failure behavior of thermoplastic fiber-metal laminates (TFMLs) under confined explosion conditions. To simulate the response of TFMLs to high-impact loads, a subroutine was developed incorporating the strain rate effect. In addition, a surrogate model for predicting the dynamic response of TFMLs was established by employing parametric modeling combined with Gaussian process regression analysis. Bayesian optimization of the thickness ratios for each layer group of the laminates was performed, using lightweight and protective performance as the comprehensive evaluation indices. The results indicate that incorporating the strain rate effect facilitates reliable characterization of both overall deformation and internal damage of TFMLs. The deviation of peak deflection between the numerically calculated value and experimental results is approximately 3 %, while the error for residual deflection is &lt;10 %. A comparative analysis shows that the strain rate effect has significant influence both on the overall deformation and internal fiber damage of the blast loaded TFMLs. Furthermore, optimizing the thickness of each stack achieved an 11.9 % reduction in areal density and a 1.6 % reduction in residual deflection compared to those of the original design scheme. Increasing the metal thickness ratios on the front and rear faces of the laminated structure was shown to significantly enhance its protective performance. This research will contribute to advancing methodologies for analyzing the dynamic response and optimizing the structural design of TFMLs.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113354"},"PeriodicalIF":5.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868345","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}

{"title":"A semi-analytical model elaborates the effect of cohesive zone on the peeling behaviors of heterogeneous thin films","authors":"Bingzhan Zhu ,&nbsp;Kun Geng ,&nbsp;Hao Li ,&nbsp;Zuoqi Zhang","doi":"10.1016/j.tws.2025.113357","DOIUrl":"10.1016/j.tws.2025.113357","url":null,"abstract":"<div><div>Film-substrate systems are prevalent in various industries, and manipulation of their adhesion strength is essential to guarantee their desired functionalities. Inspired by the heterogeneous characteristic of geckos’ spatulae, heterogeneous adhesion devices are proposed for enhanced directional adhesion, but experimental measurements of their adhesion strength are significantly lower than the theoretical predictions. This discrepancy is likely due to the cohesive zone, a factor that was usually overlooked in previous theoretical models. To elucidate the effects of the cohesive zone on the peeling behavior of bio-inspired heterogeneous thin films, we developed a semi-analytical model based on energy principles. In the model, the peeling force can be determined by two dimensionless parameters: the heterogeneity factor and the cohesive-zone factor. The heterogeneity factor significantly strengthens the adhesion when peeling from the soft side to the stiff side, and weakens the adhesion when peeling from the opposite direction. This indicates that heterogeneity simultaneously facilitates the attachment in soft-stiff direction and the detachment in stiff-soft direction. The cohesive-zone factor partially offsets the attachment enhancement by heterogeneity; however, the cohesive-zone factor has marginal impact on the detachment enhancement. This study systematically reveals the combined effects of heterogeneity and cohesive zone on the peeling behaviors of bio-inspired heterogeneous thin films and provides useful guidelines for the design of smart attachment/detachment adhesion systems.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113357"},"PeriodicalIF":5.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879400","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}

{"title":"Overall buckling behaviour of stainless-clad bimetallic steel welded box section columns","authors":"Huiyong Ban ,&nbsp;Pingyu Zhao ,&nbsp;Zhuo Zeng ,&nbsp;Yuanqing Wang","doi":"10.1016/j.tws.2025.113361","DOIUrl":"10.1016/j.tws.2025.113361","url":null,"abstract":"<div><div>Stainless-clad (SC) bimetallic steel is a new high-performance steel, composed of a substrate layer (conventional mild (CM) steel) and a cladding layer (stainless steel) which are bonded metallurgically together. It is beneficial to both favourable performance and competitive cost. This paper presents an experimental programme to investigate the overall buckling behaviour of SC bimetallic steel columns. Six welded box section columns were tested while the initial imperfections such as geometric imperfections and residual stresses were measured. Based on the column test results, the buckling mode, deformation, capacity, stress and strain of section were investigated. It was found that the capacity of SC bimetallic steel columns herein was higher than that of single metal columns. A 3D finite element model was established and validated against the test data in present study as well as in previous related references. Using the finite element model, columns with varied sections, lengths, clad ratios and steel strength grades were calculated and their buckling capacities were compared with the design value of the single metal columns. Based on the theoretical analysis on buckling behaviour, the definition of the buckling criterion for such SC bimetallic steel was proposed and corresponding column design curves were suggested.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113361"},"PeriodicalIF":5.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887650","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}

{"title":"ON THE ASYMPTOTIC SOLUTION OF THE AXISYMMETRIC PROBLEM OF FUNCTIONALLY GRADED HOLLOW SPHERE IN RADIALLY DIRECTION","authors":"N.K. Akhmedov ,&nbsp;A.H. Sofiyev","doi":"10.1016/j.tws.2025.113352","DOIUrl":"10.1016/j.tws.2025.113352","url":null,"abstract":"<div><div>In this study, the axisymmetric problem of functionally graded (FG) transversely isotropic spheres in the radial direction, which do not contain 0 and Pi poles, is investigated within the framework of 3D-elasticity theory. In this study, firstly, the elasticity theory of spheres made of homogeneous materials extended to the elasticity theory of functionally graded transversely isotropic (FGTI) spheres. Arbitrary stresses are applied to the slots that keep the hollow sphere, whose lateral surface is assumed to be fixed, in balance. Asymptotic formulas are obtained to calculate the displacements and stresses of FGTI hollow spheres for the first time. The solution of the problem consists of solutions belonging to the nature of the boundary layer localized in the slots (conical sections) inside the sphere, which is equivalent to the Saint-Venant boundary effect for FG plates. Unlike the FG isotropic sphere, weak transitional boundary layer solutions that spread far from the conical sections for FGTI spheres emerge. In addition, an asymptotic solution to the torsion problem for thin FGTI spheres is presented for the first time. The realized asymptotic solutions can be a criterion for determining the fields of application of the existing applied theories of FGTI spheres. Based on the proposed solutions, more accurate new applied theories for heterogeneous transversely isotropic spherical shells can be constructed. Finally, the changes in displacements and stresses compared to the homogeneous case are analyzed in detail when the modulus of elasticity changes linearly and inversely proportional to the radius.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113352"},"PeriodicalIF":5.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876897","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}

{"title":"Mechanical characteristics of novel multistable hybrid cellular structures with adjustable macro-Poisson's ratio","authors":"Ran Liu ,&nbsp;Changhai Chen ,&nbsp;Yuansheng Cheng","doi":"10.1016/j.tws.2025.113356","DOIUrl":"10.1016/j.tws.2025.113356","url":null,"abstract":"<div><div>To achieve superior energy absorption capacity with multi-plateau stresses, a novel type of multistable hybrid cellular (MHC) structure was constructed through the hybridization of positive, negative, and zero Poisson's ratio cells. Three subtypes of MHC structures containing diamond-, star-, and unilaterally concave hexagon-shape cells were designed and fabricated by 3D printing. Quasi-static uniaxial compression experiments and numerical simulations were carried out to uncover the mechanical characteristics of MHC structures. Theoretical analysis was conducted to predict the equivalent Young's modulus and densification strain of MHC structure. The effects of hybridization direction, interior angle of cell, wall thickness allocation, and strut length on the properties of MHC structures were delved. The main factor controlling the specific energy absorption (<em>SEA</em>) of MHC structure was distinguished. Results show that MHC structures possess the characteristics of multi-plateau stresses and adjustable macro-Poisson's ratio. Compatible deformation between sign-opposite Poisson's ratio cells together with controllable sequential layer-by-layer crushing leads to multi-stable deformation states coupled with sign-switching Poisson's ratios of MHC structures during quasi-static uniaxial compression, which are conducive to multiple energy absorption. Compared with single Poisson’s ratio cellular structures (SPCSs), MHC structures exhibit much higher multi-plateau stresses and energy absorption capacity. When the hybridization direction is parallel to the loading direction, MHC structures are superior to SPCSs in terms of both plateau stress and <em>SEA</em>. The <em>SEA</em>s of MHC structures do not change monotonously and have optimum ranges with interior angle, wall thickness allocation, and strut length. Strut length is the main control factor for <em>SEA</em>. This work showcases good application potential of MHC structures in structural protection fields, and paves a new way for designing multistable structures with adjustable macro-Poisson's ratio.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113356"},"PeriodicalIF":5.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874785","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}

{"title":"Experimental and analytical study of stainless steel self-centering beam-to-column joints with PTS-AC connections","authors":"Jundong Gao ,&nbsp;Hui Qian ,&nbsp;Jiannan Ye ,&nbsp;Huanxin Yuan ,&nbsp;Xiaobo Si ,&nbsp;Zhe Zhang ,&nbsp;Xun Zhang","doi":"10.1016/j.tws.2025.113306","DOIUrl":"10.1016/j.tws.2025.113306","url":null,"abstract":"<div><div>The philosophy of earthquake resilience has been a research hotspot of the structural seismic design. The self-centering mechanism is herein introduced into stainless steel beam-to-column joints by using post tensioned strand and angle cleat (PTS-AC) connections. Three self-centering joints fabricated from carbon steels, austenitic and duplex stainless steels were tested subjected to cyclic loading, as well as one carbon steel benchmark joint. The obtained results were discussed in detail, including deformation characteristics, experimental curves, structural properties, strain variation in local regions, stiffness and strength degradation, accumulated energy, and self-centering ability. The separation from angle flanges to column flanges was qualitatively assessed by the attenuated amplitudes and energies of signals measured using the smart aggregate-based active sensing approach. Afterwards, the existing calculation approach based on the component method was supplemented to predict the initial rotational stiffness, decompression moment and plastic moment of self-centering specimens with PTS-AC connections, and the accuracy of proposed formulas was verified with experimental structural properties.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113306"},"PeriodicalIF":5.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882828","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}

{"title":"Testing and design of wire-laser additively manufactured (WLAM) stainless steel angle section stub columns","authors":"Yao Sun ,&nbsp;Xi Chen","doi":"10.1016/j.tws.2025.113351","DOIUrl":"10.1016/j.tws.2025.113351","url":null,"abstract":"<div><div>Additive manufacturing, often known as 3D printing, is being increasingly adopted in structural engineering. This paper presents an experimental investigation on the compression resistances of wire-laser additively manufactured stainless steel angle section stub columns. A testing program was carried out, including four material tests and sixteen stub column tests. Both non-slender and slender angle section components were 3D-printed by means of wire-laser additive manufacturing and concentrically compressed for testing. Based on the test results, an in-depth design analysis was conducted to evaluate the suitability of the American, European and Chinese standards and the Continuous Strength Method for the design of wire-laser additively manufactured stainless steel angle section stub columns. The results from the design analysis indicate that the existing international design standards yield rather conservative compression resistance predictions for both non-slender and slender wire-laser additively manufactured stainless steel angle sections. It is also found that the Continuous Strength Method offers significantly improved overall design accuracy over the examined international design standards, mainly due to the rational consideration of the effect of material strain hardening.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113351"},"PeriodicalIF":5.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879399","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}

{"title":"Characterization of semi-rigid RHS T-joints with self-drilling screws","authors":"André N. GARCIA ,&nbsp;Carlos LÓPEZ-COLINA ,&nbsp;Miguel A. SERRANO ,&nbsp;Ismael GARCÍA ,&nbsp;Luciano R.O.DE LIMA ,&nbsp;Fernando L. GAYARRE","doi":"10.1016/j.tws.2025.113350","DOIUrl":"10.1016/j.tws.2025.113350","url":null,"abstract":"<div><div>This paper presents a study on an innovative type of joint between rectangular steel hollow sections (RHS), which can be used in light structures. These joints are fabricated by partially inserting one of the members into the other and then using self-drilling screws to join them effectively. The width of both profiles has to match with a difference of 10 mm, which allows the use of 4 mm thick profiles for the outer piece. The self-drilling screws are placed on both lateral faces, and they are submitted to shear. The joints are easy to mount, reducing execution costs. The rotational stiffness of the joint can be analytically calculated through some simplified assumptions if the linear stiffness of the individual component, composed of the self-drilling screw and its surrounding area, is determined adequately. This work presents some experimental results and the analytical proposal for their design as semi-rigid joints, by applying a simplified component-based method. The results demonstrate the applicability of these joints and the proposed formulation to light steel structures that can be easily fabricated and mounted with ordinary tools and without specific expertise in execution.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"213 ","pages":"Article 113350"},"PeriodicalIF":5.7,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143858936","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}

{"title":"Elastic-plastic buckling of externally pressurized auxetic domes","authors":"J. Błachut,&nbsp;M.D. White","doi":"10.1016/j.tws.2025.113324","DOIUrl":"10.1016/j.tws.2025.113324","url":null,"abstract":"<div><div>The paper studies the effect of inclusion of auxetic layer(s), into the wall of externally pressurized torispherical shells, on buckling. Both the base and auxetic layers are assumed to be isotropic and undergo elastic-plastic behavior. In the first instance, load carrying capacities are computed for the Negative Poisson’s Ratio (NPR), within -0.9 and +0.3, and for various wall configurations including: (i) single auxetic layer, (ii) sandwich wall with the auxetic layer embedded between two metallic faces, and (iii) two layer wall with the metallic outer layer and auxetic inner layer. Substantial gains in magnitudes of buckling pressure are recorded depending on the wall construction. This heavily depends on the diameter-to-wall thickness (D/t)-ratio varying between 500 and 2000. Next, the influence of Young’s modulus of the auxetic layer on buckling strength was examined. For E_auxetic equal to 10 % of E_steel, in two layer head (0.25t-steel and 0.75t-auxetic), one is able to have the same load carrying capacity as if the head had 100 % metallic wall. Finally, structural optimization was employed to assess buckling strength on a like-for-like basis due to large variability in magnitude of buckling pressure. In one specific case, the ratio of the best to the worst buckling pressure, within the admissible design parameters, was found to be 4.8. Large gains in the magnitudes of buckling pressure were also recorded for other optimal configurations. Zero order search technique coupled with a reliable re-analysis tool was employed here.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"214 ","pages":"Article 113324"},"PeriodicalIF":5.7,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868347","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}