Thin-Walled Structures最新文献_第6页

Quasi-static crushing response of a novel triaxial isotropy mechanical metamaterial with dual-platform property 具有双平台特性的新型三轴各向同性力学超材料的准静态挤压响应

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-26 DOI: 10.1016/j.tws.2024.112630

Runzhi Lu, Qian Zhang, Huizhong Zhang, Marco Meloni, Jian Feng, Jianguo Cai

{"title":"Quasi-static crushing response of a novel triaxial isotropy mechanical metamaterial with dual-platform property","authors":"Runzhi Lu, Qian Zhang, Huizhong Zhang, Marco Meloni, Jian Feng, Jianguo Cai","doi":"10.1016/j.tws.2024.112630","DOIUrl":"10.1016/j.tws.2024.112630","url":null,"abstract":"<div><div>A novel triaxial isotropy origami metamaterial with dual-platform is proposed by combining the tachi tubes and the honeycomb structures. Crushing responses of the hexahedral metamaterial under quasi-static compression load are investigated through experimental tests and numerical simulations. Experimental and numerical results reveal that the hexahedral metamaterial sample shows three deformation modes. Meanwhile, the numerical predictions of deformation modes and locations agree very well with the experimental results. Moreover, the effect of aspect ratio, thickness-to-span ratio, angle on the deformation mode, peak stress, plateau stress of different stages, and specific energy absorption (SEA<sub>M</sub>, SEA<sub>V</sub>) is investigated. Finally, the proposed metamaterial is compared with traditional honeycomb. The numerical results demonstrate that the SEA<sub>M</sub> of the hexahedral metamaterial is 90.6 % of the traditional honeycomb in the <em>Z</em>-direction. However, during <em>X</em>/<em>Y</em>-direction compression, the energy absorption capacity of the hexahedral metamaterial is 13.0 and 12.2 times that of the traditional honeycomb, respectively.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112630"},"PeriodicalIF":5.7,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554945","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

Damage calculation method for prestressed thin-walled aqueducts subjected to water pressure blasting 预应力薄壁渡槽水压爆破损伤计算方法

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-25 DOI: 10.1016/j.tws.2024.112627

Tao Peng , Gaohui Wang , Wenbo Lu , Ming Chen , Peng Yan

{"title":"Damage calculation method for prestressed thin-walled aqueducts subjected to water pressure blasting","authors":"Tao Peng , Gaohui Wang , Wenbo Lu , Ming Chen , Peng Yan","doi":"10.1016/j.tws.2024.112627","DOIUrl":"10.1016/j.tws.2024.112627","url":null,"abstract":"<div><div>In recent years, the blast resistance of hydraulic structures under explosion loads has attracted more and more attention. The damage calculation method of prestressed aqueducts subjected to blasting load is still a complicated problem. For this purpose, the theory of computation of the water pressure blasting is introduced and the formula for calculating the charge weight of the water pressure blasting is presented. The accuracy of the Coupled Eulerian-Lagrangian (CEL) algorithm of the underwater explosion model is verified by the previous experiment. Then, a fully coupled three-dimensional numerical model of a prestressed aqueduct is established to acquire the dynamic performances and failure mechanisms of the prestressed aqueduct subjected to water pressure blasting. The influence of the prestress and pull rod on nonlinear dynamic performances and failure modes of a prestressed aqueduct subjected to water pressure blasting are discussed. Finally, based on the wave and material mechanics, a method of calculation for the prestressed aqueduct subjected to water pressure blasting is presented. The accuracy of the suggested method is validated by the damage mode of the prestressed aqueduct subjected to water pressure blasting under various TNT weights. The analysis results show that the proposed method can satisfy the relationship between the damage characteristics of the prestressed aqueduct to water pressure blasting and various TNT weights. 1.5 kg TNT is insufficient to completely shatter the prestressed aqueduct, while 3.5 kg TNT can cause a perfect crushing effect. 7.5 kg TNT will result in excessive fragmentation of the prestressed aqueduct and inefficient utilization of the explosive energy. The proposed damage calculation method can provide significant support for explosion analysis of the prestressed thin-walled aqueduct structure.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112627"},"PeriodicalIF":5.7,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552446","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

Buckling behaviour of high-strength retrofitted steel sections manufactured through post heat-treatment processes 通过后热处理工艺制造的高强度改造型钢的屈曲性能

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-24 DOI: 10.1016/j.tws.2024.112626

Shadiya Jamshiyas , Konstantinos Skalomenos , Yang Ma , Marios Theofanous

{"title":"Buckling behaviour of high-strength retrofitted steel sections manufactured through post heat-treatment processes","authors":"Shadiya Jamshiyas , Konstantinos Skalomenos , Yang Ma , Marios Theofanous","doi":"10.1016/j.tws.2024.112626","DOIUrl":"10.1016/j.tws.2024.112626","url":null,"abstract":"<div><div>High-strength steel is increasingly popular in construction for its strength-to-weight ratio, which lowers the self-weight of structures and reduces transportation, erection, and foundation costs. Induction hardening (IH) process which involves rapid heating and cooling of the material leads to microstructural changes which enhance the hardness and strength of conventional steel, elevating it to the level of High Strength (HS) steel. This study reports an extensive investigation on the buckling response and design of IH post-treated structural steel Circular Hollow Sections (CHS). It includes tensile coupon tests, microstructural analyses, initial geometric imperfection measurements, and residual stress evaluations to determine the effects of IH treatment on CHS. Column buckling tests were conducted, and a numerical model was developed and validated against the experimental results which was utilised to study systematically the effect of imperfections. The findings suggest that the magnitude of the imperfections in IH steel sections doubled compared to the non-treated condition, whilst there was a minimal impact on the residual stresses. A comprehensive parametric study was performed using finite element models to study the structural response of IH steel CHS columns over a large range of global slendernesses and allow the assessment of the buckling curves specified in EN 1993–1–1. It was concluded that the buckling curve <strong>a</strong> (imperfection factor, α=0.21) specified in EN 1993–1–1 provides the best buckling load predictions for the IH steel CHS columns, the response of which is superior to that of their virgin counterparts, despite the increased imperfections caused by the heat-treating process.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112626"},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CVAE-based inverse design of two-dimensional honeycomb pentamode metastructure for acoustic cloaking 基于 CVAE 的用于声隐形的二维蜂巢五模元结构反设计

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-24 DOI: 10.1016/j.tws.2024.112623

Gen Li, Lihua Tang, Vladislav Sorokin, Shaohua Wang

引用次数: 0

A multiscale Gaussian expansion method for low-frequency multimodal damping analysis of variable stiffness acoustic black hole beams 用于变刚度声学黑洞梁低频多模态阻尼分析的多尺度高斯扩展方法

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-23 DOI: 10.1016/j.tws.2024.112619

Wei Li , Huabing Wen , Junhua Guo

{"title":"A multiscale Gaussian expansion method for low-frequency multimodal damping analysis of variable stiffness acoustic black hole beams","authors":"Wei Li , Huabing Wen , Junhua Guo","doi":"10.1016/j.tws.2024.112619","DOIUrl":"10.1016/j.tws.2024.112619","url":null,"abstract":"<div><div>To address the issues of slow convergence and poor accuracy in existing dynamics methods caused by non-uniform variable cross-sections and layered material stiffness variations in variable stiffness acoustic black hole structure (VSABH). A multiscale Gaussian expansion method (MSGEM) is proposed in this paper. The structural dimensions are taken into account, and the structural parameters of multiple shape functions are adaptively selected based on stiffness and cross-sectional variation parameters. This results in the formation of shape function groups of various scales, which in turn creates the matrix of multi-scale Gaussian function groups. The feature information of the displacement field is realized to be extracted from multiple scales, and the fitting error of MSGEM to the displacement field of VSABH beam is within 2.02 %. The missing solution of eigenfrequency of Gaussian expansion method is avoided, and the modal vibration patterns are basically matched, which verifies the validity of MSGEM. Meanwhile, the advantages of low-frequency multimodal vibration reduction of VSABH beams are highlighted from several aspects, and the trend of the adjustment of the vibration reduction characteristics of VSABH beams by different parameters is clarified, which provides valuable design guidance for ABH metamaterials oriented to low-frequency vibration reduction.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112619"},"PeriodicalIF":5.7,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664010","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 four-node inverse curved shell element coupling MITC method for deformation reconstruction of plate and shell structures 用于板壳结构变形重建的四节点反向曲面壳元素耦合 MITC 方法

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-23 DOI: 10.1016/j.tws.2024.112598

Xiao Xiao, Shishun Zhang, Jianping Xuan, Tielin Shi

{"title":"A four-node inverse curved shell element coupling MITC method for deformation reconstruction of plate and shell structures","authors":"Xiao Xiao, Shishun Zhang, Jianping Xuan, Tielin Shi","doi":"10.1016/j.tws.2024.112598","DOIUrl":"10.1016/j.tws.2024.112598","url":null,"abstract":"<div><div>In the field of structural deformation monitoring, the inverse finite element method (iFEM) has significant engineering value as a structural health monitoring technique that provides timely and reliable warnings for shell structures. However, existing inverse finite elements are mainly based on first-order shear deformation theory and kirchhoff–love theory, which are not suitable for deformation reconstruction in plate and shell structures of arbitrary thickness. This study integrates iFEM with the Mixed Interpolation of Tensorial Components (MITC) method to develop a novel four-node quadrilateral inverse curved shell element, named iMICS(inverse Mixed Interpolation Curved Shell)4, aimed at enhancing the accuracy and efficiency of deformation reconstruction in complex plate and shell structures. The method uses the MITC4 shell element as the kinematic framework and applies the least squares variational principle to achieve deformation reconstruction, effectively alleviating shear and membrane locking issues across structures of varying thickness. Numerical examples validate the superior performance of the iMICS4 element, demonstrating its promising application prospects.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112598"},"PeriodicalIF":5.7,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552443","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

Kinematics and dynamics characteristics of a double-ring truss deployable antenna mechanism based on triangular prism deployable unit 基于三角棱柱可展开单元的双环桁架可展开天线机构的运动学和动力学特性

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-22 DOI: 10.1016/j.tws.2024.112608

Bo Han , Yuanzhi Zhou , Meng Han , Xiaoyu Hu , Yundou Xu , Jiantao Yao

{"title":"Kinematics and dynamics characteristics of a double-ring truss deployable antenna mechanism based on triangular prism deployable unit","authors":"Bo Han , Yuanzhi Zhou , Meng Han , Xiaoyu Hu , Yundou Xu , Jiantao Yao","doi":"10.1016/j.tws.2024.112608","DOIUrl":"10.1016/j.tws.2024.112608","url":null,"abstract":"<div><div>In order to effectively improve the single-ring truss deployable antenna mechanism due to the large aperture caused by the problem with low structural strength and low-profile accuracy, a series of double-ring truss deployable antenna mechanisms (DRTDAM) are proposed with constant height during folding and deployment process. First, a variety of DRTDAMs are proposed based on tetrahedral units and their topologies are analyzed. Secondly, degree-of-freedom (DOF) characteristics of DRTDAM proposed in this paper are analyzed based on the screw theory and screw-constrained topological graphs and based on this, the kinematic characteristics of DRTDAM is investigated. Thirdly, the dynamics of the whole DRTDAM is built with Newton-Euler equations of multi-rigid body system. Finally, the correctness of above analysis is verified through dynamics analysis software ADAMS and numerical analysis software MATLAB, and the principle prototype is produced to verify the correctness of DOF analysis. The mechanism proposed in this paper enriches the configuration of DRTDAM, and the process of kinematic characterization method is clear and simple, which is meaningful for the research in space complex mechanism.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112608"},"PeriodicalIF":5.7,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560654","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

Study on the buckling behavior of aluminum alloy sheets - before and after repaired with composite patches 铝合金板材屈曲行为研究--复合材料修补前后

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-22 DOI: 10.1016/j.tws.2024.112614

Xin Li , Anbiao Zhong , Jiale Zhang , Weilin Dong , Ruoqin Xiong , Heng Zhang , Xiaoliang Geng , Lei Huang , Jun Liu

{"title":"Study on the buckling behavior of aluminum alloy sheets - before and after repaired with composite patches","authors":"Xin Li , Anbiao Zhong , Jiale Zhang , Weilin Dong , Ruoqin Xiong , Heng Zhang , Xiaoliang Geng , Lei Huang , Jun Liu","doi":"10.1016/j.tws.2024.112614","DOIUrl":"10.1016/j.tws.2024.112614","url":null,"abstract":"<div><div>In this paper, the compressive buckling behavior of aluminum alloy plates with an elliptical hole of various sizes is investigated. In order to improve the stability of these thin plates, T700/QY8911 composite laminate is used as a patch to repair the hole. The study included an analysis of the critical and post-critical behaviour using experimental and numerical methods. Experiments focus on buckling loads, post-buckling behavior and the relationship between sizes of holes and buckling load. Meanwhile, the buckling load and buckling mode are determined by finite element analysis, using linear analysis of eigenvalue problems modes, and then, the nonlinear analysis of structures with initiated geometrically imperfection is carried out, studying its post-buckling behavior, damage behavior and transfer of load. The results show that the buckling load of the open-hole specimen is related to size of opening. The existence of patch has a significant influence on stress distribution, and the buckling capability of repaired specimens is noticeably improved to the plate without a hole. And the compression experimental results are consistent with the numerical results, revealing that the developed finite element model of the structure is correct.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112614"},"PeriodicalIF":5.7,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539463","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

Boosting tree with bootstrap technique for pre-stress design in cable dome structures 采用引导技术的提升树用于缆索穹顶结构的预应力设计

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-22 DOI: 10.1016/j.tws.2024.112611

Yutao He , Jiamin Guo , Huan Ping , MingLiang Zhu , Weigang Chen , Guangen Zhou

{"title":"Boosting tree with bootstrap technique for pre-stress design in cable dome structures","authors":"Yutao He , Jiamin Guo , Huan Ping , MingLiang Zhu , Weigang Chen , Guangen Zhou","doi":"10.1016/j.tws.2024.112611","DOIUrl":"10.1016/j.tws.2024.112611","url":null,"abstract":"<div><div>Tensegrity structures, known for their rigidity derived from feasible pre-stresses, present unique challenges in structural engineering. Traditional force-finding methods, though comprehensive, rely heavily on intricate matrix computations, making them computationally intensive and often uncomfortable for considering external loads in practical engineering scenarios. This paper introduces a novel approach to compute pre-stresses in cable dome structures by integrating machine learning and probability theory, collectively termed the boosting tree with bootstrap technique (BTWBT). This method reduces the sample size to as few as 100 per iteration, while improving computational efficiency by randomly generating internal forces. By reframing the force determination as an inverse problem, it ensures that structural displacement converges to zero under feasible pre-stresses. The effectiveness of BTWBT is demonstrated across three distinct cable dome structures: the Geiger dome, Kiewitt dome, and rotating hyperboloid cable dome. Results show that BTWBT achieves the preset displacement requirement (maximum nodal displacement below 0.01 mm) with fewer iterations and reduced computational cost compared to traditional machine learning methods. BTWBT's capability to manage complex structural configurations with minimal data, while incorporating random internal force generation ranges, highlights its potential as a superior alternative for force determination in tensegrity structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112611"},"PeriodicalIF":5.7,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579011","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

Nonlinear finite element formulation for thin-walled conical shells 薄壁锥形壳的非线性有限元计算公式

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-22 DOI: 10.1016/j.tws.2024.112617

Saher Attia , Magdi Mohareb , Samer Adeeb

引用次数: 0