Thin-Walled Structures最新文献_第10页

Experimental study on multiple self-healing and impact properties of 2D carbon fiber fabric-reinforced epoxy composites with shape memory properties 具有形状记忆特性的二维碳纤维织物增强环氧树脂复合材料的多重自愈合和冲击特性实验研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-12 DOI: 10.1016/j.tws.2024.112549

Enbo Zhao , Qiheng Xia , Lulu Liu , Feng Jin , Gang Luo , Zhenhua Zhao , Wei Chen

{"title":"Experimental study on multiple self-healing and impact properties of 2D carbon fiber fabric-reinforced epoxy composites with shape memory properties","authors":"Enbo Zhao , Qiheng Xia , Lulu Liu , Feng Jin , Gang Luo , Zhenhua Zhao , Wei Chen","doi":"10.1016/j.tws.2024.112549","DOIUrl":"10.1016/j.tws.2024.112549","url":null,"abstract":"<div><div>Fiber-reinforced thermoset polymers are widely used in aerospace as a material with excellent performance. However, for the low-velocity impact damage to which they are most susceptible, existing repair methods are difficult to maintain the aerodynamic performance of the components (back to its pre-damage shape) after repair. In this study, the multiple impact deformation recovery, internal damage healing, and post-repair impact properties of epoxy-PCL (ε-caprolactone) 2D carbon fiber fabric-reinforced polymers with shape memory and self-healing properties were investigated. The material is manufactured using a hot press tank-prepreg process, curing at 160 °C for 3.5 h at 6 atmospheres. The results show that the incorporation of thermoplastic PCL into the composite matrix can enhance the self-healing ability and impact resistance of the material. Composites after lower energy impacts retain their structural integrity and mechanical properties after healing. Materials can recover effectively from a single impact, but repeated impacts can lead to more extensive damage, which makes healing more difficult and causes a decrease in Healing efficiency. The shape memory effect of composites can restore plastic deformation caused by impact, which highlights the potential of shape memory smart composites for aerospace applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112549"},"PeriodicalIF":5.7,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445102","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

Numerical simulation for microstructure control in wire arc additive manufacturing of thin-walled structures 线弧增材制造薄壁结构微结构控制的数值模拟

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-12 DOI: 10.1016/j.tws.2024.112581

Lichao Zhang , Hongshan Zhou , Jingyuan Chen , Hongyang Wang , Weiwei Liu , Zhaodong Zhang , Gang Song , Liming Liu , Zhao Zhang

{"title":"Numerical simulation for microstructure control in wire arc additive manufacturing of thin-walled structures","authors":"Lichao Zhang , Hongshan Zhou , Jingyuan Chen , Hongyang Wang , Weiwei Liu , Zhaodong Zhang , Gang Song , Liming Liu , Zhao Zhang","doi":"10.1016/j.tws.2024.112581","DOIUrl":"10.1016/j.tws.2024.112581","url":null,"abstract":"<div><div>The difference of cooling rates on the surface and the interior of thin-walled structures leads to significant differences of microstructures in additive manufacturing (AM). To reveal the microstructure control in wire arc additive manufacturing of thin-walled structures, a gas-heat coupling model with experimental validation is proposed. The computational accuracy can reach 96 % in prediction of temperatures and microstructures. Increasing the preheating or scanning speed leads to a higher probability of heterogeneous nucleation on the surface of thin-walled structures. When the pre-heating is increased from 550 K to 750 K, the proportion of equiaxed grains increases by 20.8 %. When the gas flow rate of super cooling is increased from 20 L/min to 30 L/min, the size of equiaxed grains is decreased from 0.33 mm to 0.23 mm on the surface, and the width of columnar grains is decreased from 0.53 mm to 0.42 mm in the interior. This is due to the significant differences in cooling rates in thin-walled structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112581"},"PeriodicalIF":5.7,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539468","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

Semi-analytical formulation to predict the vibroacoustic response of a fluid-loaded plate with ABH stiffeners 预测带有 ABH 加劲件的流体载荷板振动声学响应的半解析公式

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-11 DOI: 10.1016/j.tws.2024.112539

Daniel Martins , Mahmoud Karimi , Laurent Maxit

{"title":"Semi-analytical formulation to predict the vibroacoustic response of a fluid-loaded plate with ABH stiffeners","authors":"Daniel Martins , Mahmoud Karimi , Laurent Maxit","doi":"10.1016/j.tws.2024.112539","DOIUrl":"10.1016/j.tws.2024.112539","url":null,"abstract":"<div><div>Stiffened structures are widely used in aeronautics, marine and rail industries. When stiffeners are integrated into host structures, so-called Bloch–Floquet waves are generated due to interactions between the host’s flexural waves and the stiffeners’ flexural and torsional waves. It is reported in the literature that these waves are often the source of undesirable noise and vibrations when the stiffened structure is excited by a force. To mitigate unwanted noise and vibrations from the stiffened structures, this study proposes to replace common rectangular stiffeners with acoustic black hole (ABH) stiffeners. To do this, a semi-analytical model is initially developed in the wavenumber domain to predict the forced vibroacoustic response of a 2D fluid-loaded infinite plate with stiffeners on one side. In the proposed model, the stiffeners are characterised by their translational and rotational dynamic stiffnesses which can be estimated by a finite element method (FEM). These dynamic stiffnesses are then coupled with the analytical formulation of the fluid-loaded plate to obtain the expressions of the spectral displacement and radiated pressure. Comparisons of the results in terms of the plate’s mean quadratic velocity and radiated sound power for the rectangular and ABH stiffeners show that by using the ABH stiffeners instead of the conventional stiffeners, one can significantly reduce the vibroacoustic response of light/heavy fluid-loaded plates.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112539"},"PeriodicalIF":5.7,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539402","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

Experimental investigation of high-velocity impact response and compression after impact behavior of continuous carbon fiber thermoplastic composites 连续碳纤维热塑性复合材料的高速冲击响应和冲击后压缩行为实验研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-11 DOI: 10.1016/j.tws.2024.112578

Gang Wei, Chenyu Hao, Hongwei Jin, Yunfei Deng

{"title":"Experimental investigation of high-velocity impact response and compression after impact behavior of continuous carbon fiber thermoplastic composites","authors":"Gang Wei, Chenyu Hao, Hongwei Jin, Yunfei Deng","doi":"10.1016/j.tws.2024.112578","DOIUrl":"10.1016/j.tws.2024.112578","url":null,"abstract":"<div><div>In order to meet the urgent needs for the application of thermoplastic composite structures in aircraft manufacturing and other fields, the impact resistance and damage tolerance of continuous carbon fiber reinforced thermoplastic composite laminates (CCFRTP) are investigated by high-velocity impact (HVI) and compression after impact (CAI) experiments in this paper. The impact experiment results show that the ballistic response of laminates under small-angle conventional impact is similar, and the impact resistance of laminates under large-angle oblique impact is significantly improved. The failure mechanism of laminates under high-velocity impact is revealed by analyzing the impact process of the projectile, the energy absorption level, the failure morphology and internal damage degree of laminates comprehensively. It is clear that the impact angle and velocity of the projectile will significantly affect the coupling form of the failure mechanism and lead to differentiated results. The results of in-plane compression experiment of laminates with impact damage show that the bearing capacity of laminates is significantly weakened by high velocity impact damage, and the residual strength of laminates is directly determined by the mode and degree of impact damage. In particular, through the analysis of the energy absorption mechanism, a trend prediction model of ballistic limit value with impact angle is established, and the influence of high-velocity impact damage on the residual strength of laminates is revealed. This study provides a better understanding of the mechanical response of thermoplastic composite structures to high-velocity impact loads.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112578"},"PeriodicalIF":5.7,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438466","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

Experimental study of composite cold-formed steel and timber flooring systems with innovative shear connectors 采用创新剪力连接件的冷弯型钢和木地板复合系统的实验研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-11 DOI: 10.1016/j.tws.2024.112571

Nathan Vella , Pinelopi Kyvelou , Spiridione Buhagiar , Leroy Gardner

引用次数: 0

A multi-bionic design strategy for modular energy absorption system based on interlocking suture integrated with Bouligand-like arranged perforations 模块化能量吸收系统的多仿生设计策略，基于集成了布利甘式穿孔的互锁缝合线

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-11 DOI: 10.1016/j.tws.2024.112553

Jiaxuan Li , Chao Sui , Yuna Sang , Yichen Zhou , Zifu Zang , Yushun Zhao , Xiaodong He , Chao Wang

{"title":"A multi-bionic design strategy for modular energy absorption system based on interlocking suture integrated with Bouligand-like arranged perforations","authors":"Jiaxuan Li , Chao Sui , Yuna Sang , Yichen Zhou , Zifu Zang , Yushun Zhao , Xiaodong He , Chao Wang","doi":"10.1016/j.tws.2024.112553","DOIUrl":"10.1016/j.tws.2024.112553","url":null,"abstract":"<div><div>Thin-walled tubes are widely used in the field of cushioning energy absorption as an ideal structural unit. However, the performance of the thin-walled tube system is greatly limited by the presence of redundant connection structures. To address these issues, a multi-bionic design strategy for high-performance modular system was developed in this work, which innovatively combines the robust joint structure of the interlocking suture with the efficient deformation mode of the Bouligand structures. In the design process, the suture-inspired system was studied separately, and its mechanical behaviors were investigated by FEM simulations and experiments. The results showed that the modular system has good structural scalability and tunable deformation mode, and can be adjusted on demand to accommodate different loads and geometric features. Furthermore, in order to reduce the weight and improve the deformation degree of the system, an optimization strategy inspired by the efficient deformation mode of the Bouligand structure was proposed by perforating a sequence of helix-arranged guide holes in the sidewalls of the tubes. The results showed that the double-helix perforated system can reduce the weight by 10% while increasing the specific energy absorption by 58% compared with the unperforated system. In addition, the specific energy absorption and energy absorption efficiency of the system are as high as 48.25 <em>J</em>/g and 56.17%, which is comparable to traditional honeycomb sandwich panels while retaining structural stability and adjustable performance. Therefore, this multi-bionic strategy can integrate the advantages of various natural structures and provide new insights for the design of high-performance protective systems.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112553"},"PeriodicalIF":5.7,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539401","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

Failure behavior and damage model of composite sandwich panels under three-point bending fatigue load 复合材料夹芯板在三点弯曲疲劳载荷下的失效行为和损伤模型

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-11 DOI: 10.1016/j.tws.2024.112570

Fan Dong , Yazhi Li , Xin Qi , Weijie Ma , Chunping Zhou , Biao Li

{"title":"Failure behavior and damage model of composite sandwich panels under three-point bending fatigue load","authors":"Fan Dong , Yazhi Li , Xin Qi , Weijie Ma , Chunping Zhou , Biao Li","doi":"10.1016/j.tws.2024.112570","DOIUrl":"10.1016/j.tws.2024.112570","url":null,"abstract":"<div><div>Composite sandwich panels present a variety of damage modes due to their diverse components and variable structural parameters. This work conducted three-point bending static and fatigue tests on composite sandwich panels using specially designed fixtures to investigate their bending-shear characteristics and failure behaviors. The effects of core orientations, i.e., <span>L</span>-direction and W-direction, on the static strength, fatigue life, and fatigue crack initiation and propagation were compared. A stiffness-degradation-based fatigue damage model was constructed for the sandwich panels to describe the entire failure process from core cracking to core/plates debonding, achieving accurate modeling under the full load ratios. A differential evolution algorithm incorporating a penalty function was employed to optimize the model parameters under varying stresses. It was found that the designed fixture enables bi-directional fatigue loading and effectively avoids additional axial forces. Fatigue damage in sandwich panels resembles static but spans a wider area. While damage modes are similar in W-direction and <span>L</span>-direction, <span>L</span>-direction cores have higher stiffness and strength, and lower fatigue resistance in W-direction. Furthermore, the proposed fatigue damage model demonstrates excellent agreement with experimental results, achieving <em>R<sup>2</sup></em> = 0.968.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112570"},"PeriodicalIF":5.7,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539469","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

Stability analysis of a vertical cantilever pipe with lumped masses conveying two-phase flow 带有块状质量的垂直悬臂管道输送两相流的稳定性分析

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-11 DOI: 10.1016/j.tws.2024.112537

Xiao Wang , Guangming Fu , Huilin Jiao , Boying Wang , Baojiang Sun , Jian Su

{"title":"Stability analysis of a vertical cantilever pipe with lumped masses conveying two-phase flow","authors":"Xiao Wang , Guangming Fu , Huilin Jiao , Boying Wang , Baojiang Sun , Jian Su","doi":"10.1016/j.tws.2024.112537","DOIUrl":"10.1016/j.tws.2024.112537","url":null,"abstract":"<div><div>This study investigates the vibration behavior of a vertical cantilever pipe conveying gas–liquid two-phase flow, focusing on the influence of lumped masses attached to the vertical cantilevered pipe. The governing motion equation based on small deflection Euler–Bernoulli beam theory is solved by using the generalized integral transforms technique. The proposed solution approach was first validated against available numerical and experimental results in the literature. The effects of the mass ratios, number and position of lumped masses on the stability of the pipe are investigated. Numerical results show that the parameters of the lumped masses affect significantly the stability of the pipe conveying two-phase flow, by altering the fluid–structure interaction dynamics and impacting natural frequencies and vibration modes of the pipe. Specifically, as the position of a single lumped mass moves downward from the fixed end to the free end, the critical flow velocity initially increases and subsequently decreases, thereby reducing the stability of pipe. Moreover, increasing the number of lumped masses significantly impacts the critical flow velocity due to the mass ratios and locations. Notably, modal “jumping” phenomena are observed, which demonstrate continuous shifts between equilibrium and non-equilibrium states in the cantilever pipes. These findings are crucial for ensuring the safe operation of pipes with discrete masses across various engineering applications.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112537"},"PeriodicalIF":5.7,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539536","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

Experimental testing and plastic strain analysis of high strength steel longitudinal plate to tubular X joints 高强度钢纵向板与管 X 接头的实验测试和塑性应变分析

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-11 DOI: 10.1016/j.tws.2024.112573

Ihyun Ryu , Seon-Hu Kim , Cheol-Ho Lee

{"title":"Experimental testing and plastic strain analysis of high strength steel longitudinal plate to tubular X joints","authors":"Ihyun Ryu , Seon-Hu Kim , Cheol-Ho Lee","doi":"10.1016/j.tws.2024.112573","DOIUrl":"10.1016/j.tws.2024.112573","url":null,"abstract":"<div><div>Applying high strength steels to tubular joints can increase the propensity to fracture failure due to their lower ductility. However, to simulate the fracture behavior in the finite element (FE) analysis, sophisticated material damage model with rigorous fracture criteria should be incorporated. Recently, the latest draft of ISO 14346 has advocated the use of 5 % strain limit in FE analysis of tubular joints. The strain limit concept has been further developed by the authors’ previous work, for its use as a practical alternative to the complicated material damage model. Specifically, a lowered limit of 2.5 % was recommended for longitudinal plate to circular hollow section (CHS) joints subjected to in-plane bending. This study extends the strain limit investigation to longitudinal plate to tubular X joints subjected to tensile loads. An experimental program is first presented which included both CHS and rectangular hollow section (RHS) chord members fabricated from two high strength steels with nominal yield stresses of 460 MPa and 700 MPa. Based on test-validated supplemental numerical analyses, it is suggested that the joint load corresponding to 2.5 % strain limit can be taken as the load-bearing capacity to suppress occurrence of a fracture failure for the tubular joint configurations considered in this study.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"206 ","pages":"Article 112573"},"PeriodicalIF":5.7,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572874","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

An experimental study on web-bearing resistance of cold-formed steel sigma-shaped sections with web holes under interior-two-flange loading case 带腹板孔的冷弯型钢西格玛形截面在内部两翼缘加载情况下的腹板承载阻力实验研究

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2024-10-11 DOI: 10.1016/j.tws.2024.112579

Boshan Chen , Yecheng Dai , Wei Wang , Youtian Wang , Lisheng Luo , Peng Dai , James Lim

{"title":"An experimental study on web-bearing resistance of cold-formed steel sigma-shaped sections with web holes under interior-two-flange loading case","authors":"Boshan Chen , Yecheng Dai , Wei Wang , Youtian Wang , Lisheng Luo , Peng Dai , James Lim","doi":"10.1016/j.tws.2024.112579","DOIUrl":"10.1016/j.tws.2024.112579","url":null,"abstract":"<div><div>Cold-formed steel (CFS) sigma-shaped sections used as flooring joists and bearers are commonly fabricated with web holes to accommodate building services. These sections featuring web stiffeners and curved lips exhibit lower web-bearing resistance than traditional lipped channel sections. However, the web-bearing resistance of CFS sigma-shaped sections with web holes has not been thoroughly investigated. To address this gap, a detailed experimental investigation was conducted, testing 29 CFS sigma-shaped sections with web holes under an interior-two-flange (ITF) loading case. For comparison, specimens without web holes were also tested. Variables such as hole diameter ratio, hole location, bearing length, and flange condition were examined. A finite element (FE) model was developed and validated against the test results. The results indicated that the web-bearing resistance for specimens with web holes was reduced by 24.0 % on average. To assess the accuracy of existing design specifications, the test results were compared against the design strengths predicted by the American Iron and Steel Institute (AISI) (2016), Australian and New Zealand Standards (AS/NZS) (2018), European Standard (EC3) (2006), and Uzzaman et al. (2012). The comparison revealed that the design strength predicted by Uzzaman et al. (2012) agreed well with the test results.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"205 ","pages":"Article 112579"},"PeriodicalIF":5.7,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445101","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