Thin-Walled Structures最新文献_第4页

Calibration of the shear-modified GTN model for HAZ of butt-welded high-strength steel (HSS) 对焊高强钢热影响区剪切修正GTN模型的标定

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-24 DOI: 10.1016/j.tws.2025.114027

Yize Gao , Rui Yan , Milan Veljkovic , Kristo Mela , Guo-Qiang Li , Yan-Bo Wang , Xiao-Ling Zhao

{"title":"Calibration of the shear-modified GTN model for HAZ of butt-welded high-strength steel (HSS)","authors":"Yize Gao , Rui Yan , Milan Veljkovic , Kristo Mela , Guo-Qiang Li , Yan-Bo Wang , Xiao-Ling Zhao","doi":"10.1016/j.tws.2025.114027","DOIUrl":"10.1016/j.tws.2025.114027","url":null,"abstract":"<div><div>Welding induces microstructural changes in the base metal, forming a heat-affected zone (HAZ) that is especially prone to strength degradation in high-strength steel (HSS) connections. While the mechanical behavior of welded joints is strongly influenced by the softened HAZ, most existing research has focused on its tensile and fatigue properties, with limited attention given to its shear behavior, despite evidence of shear failure mechanisms in certain welded structures.</div><div>Building on recent advances in damage modeling, this paper calibrates a shear-modified Gurson-Tvergaard-Needleman (GTN) model tailored for the HAZ. The GTN model, which uses void volume fraction as a damage index and accounts for microvoids and stress triaxiality, is extended here to better capture shear-dominated failure modes. In the meantime, shear tests were conducted on coupon specimens extracted from butt-welded cold-formed rectangular hollow sections fabricated from three steel grades and three thicknesses. Load-deformation curves and local strain measurements are obtained from these shear tests. Finite element (FE) simulations of the HAZ, incorporating the shear-modified GTN model, are conducted. The experimentally measured load-deformation curves are used to calibrate the parameters of the shear-modified GTN model, while the measured local strains serve to validate the FE model. Practical values for the key parameters of the shear-modified GTN model are recommended for engineering applications. The estimated ultimate load carrying capacity based on the proposed model is in close agreement (approximately 5 %) with the experimental values. The limitations of the proposed model and directions for future research are also pointed out.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114027"},"PeriodicalIF":6.6,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221529","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

Low-velocity impact behaviour of functionally graded UHPC sandwich retrofitted concrete barriers 功能分级UHPC夹层改造混凝土屏障的低速冲击性能

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-23 DOI: 10.1016/j.tws.2025.114018

Zheng Luo, Yinhui Wang

{"title":"Low-velocity impact behaviour of functionally graded UHPC sandwich retrofitted concrete barriers","authors":"Zheng Luo, Yinhui Wang","doi":"10.1016/j.tws.2025.114018","DOIUrl":"10.1016/j.tws.2025.114018","url":null,"abstract":"<div><div>To address the limitations of traditional retrofitting methods for reinforced concrete (RC) bridge barriers, this study proposes a novel functionally graded ultra-high-performance concrete (UHPC) sandwich barrier system incorporating an energy-absorbing expanded polystyrene (EPS) foam concrete core. This lightweight prefabricated system enables installation without removal of the existing barrier, ensures rapid construction, and significantly enhances impact resistance. Low-velocity impact tests were conducted to evaluate the effects of different EPS volume fractions, UHPC face-panel fibre types, and panel configurations on the impact performance of the sandwich structures. The results demonstrated that the specimens with EPS cores showed approximately 30 % lower peak impact forces than of those without cores. An EPS volume fraction of approximately 40 % achieved the best balance between core densification and overall stiffness, providing high energy dissipation and good deformation performance. Hybrid fibre reinforcement and rib-stiffened configurations further enhanced crack control, delayed failure, and promoted more uniform energy absorption. Based on these experimental findings, validated finite-element models confirmed the influence of EPS content and the thickness of different functional layers on the dynamic response, and identified an optimal configuration that balances energy dissipation and UHPC panel stiffness.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114018"},"PeriodicalIF":6.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145134754","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

Probabilistic restoring force model of corroded steel column considering corrosion pit random characteristics 考虑腐蚀坑随机特性的腐蚀钢柱概率恢复力模型

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-23 DOI: 10.1016/j.tws.2025.114021

Youde Wang , Xiaodong Zhou , Zhihao Fang , Hao Wang , Haijiang Zhang , Bo Liu , Muzaffar Hamdamov , Shanhua Xu

{"title":"Probabilistic restoring force model of corroded steel column considering corrosion pit random characteristics","authors":"Youde Wang , Xiaodong Zhou , Zhihao Fang , Hao Wang , Haijiang Zhang , Bo Liu , Muzaffar Hamdamov , Shanhua Xu","doi":"10.1016/j.tws.2025.114021","DOIUrl":"10.1016/j.tws.2025.114021","url":null,"abstract":"<div><div>This paper systematically investigated the influence of corrosion on the hysteretic performance of steel columns through experimental research, theoretical analysis and numerical simulation. A probabilistic restoring force model of corroded steel column considering corrosion pit random characteristics was established. Pseudo-static tests on artificially accelerated corroded steel columns revealed that corrosion accelerated buckling occurrence, reduced buckling deformation range of column bottom, and significantly decreased strength, stiffness and ductility. Based on the load-displacement hysteresis curves and theoretical analysis, a restoring force model (RFM) for corroded steel columns was proposed. To quantify the uncertainty introduced by corrosion pit randomness for RFM, extensive finite element parametric analyses of corroded steel columns were performed through Monte Carlo simulation. The results showed that key parameters of RFM followed normal distributions. Their mean and standard deviation exhibited functional relationships (linear or power) with the non-uniform corrosion ratio of steel column (<em>ρ</em><sub>pc</sub>). Accordingly, a probabilistic RFM of corroded steel column considering corrosion pit random characteristics was established, providing theoretical basis and data support for the seismic performance assessment of existing corroded steel structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114021"},"PeriodicalIF":6.6,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159356","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 investigation into the axial compressive buckling behavior of LQ550 cold-formed channel columns with web openings LQ550带腹板开口冷弯槽柱轴向压缩屈曲行为试验研究

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-22 DOI: 10.1016/j.tws.2025.114017

Dengfeng Wang , Jingwen Wang , Siyang Liu , Zhengyong Liu , Baoping Zhong

{"title":"Experimental investigation into the axial compressive buckling behavior of LQ550 cold-formed channel columns with web openings","authors":"Dengfeng Wang , Jingwen Wang , Siyang Liu , Zhengyong Liu , Baoping Zhong","doi":"10.1016/j.tws.2025.114017","DOIUrl":"10.1016/j.tws.2025.114017","url":null,"abstract":"<div><div>In recent years, cold-formed thin-walled steel members have been extensively utilized in prefabricated structures owing to their lightweight and high-strength properties. However, openings in the column web for accommodating water, electricity, heating, and ventilation ducts significantly affect the axial compressive bearing capacity, warranting a comprehensive investigation. This study conducts axial loading tests on LQ550 high-strength cold-formed thin-walled steel channel sections with web openings. The findings indicated that the presence of openings does not significantly affect the buckling mode; however, it intensifies the magnitude of buckling deformation and diminishes the bearing capacity of the columns. Short columns with openings predominantly undergo distortional-local buckling, while long columns exhibit distortional-local-global interactive buckling. The openings affect the location of buckling in the column. Local and distortional buckling in columns with varying heights predominantly occurs in the vicinity of the openings. However, for slender columns, the correlation between the position of maximum global deflection and the opening locations is negligible. The opening size exhibits the most significant impact on bearing capacity, followed by the number of openings, while the opening shape demonstrates the least effect. For the same number of openings, although sections with wide web exhibit a wider range and degree of local buckling around the openings, the reduction in bearing capacity for narrow-web sections is more pronounced. Finally, a conservative recommendation for the reduction coefficient of bearing capacity for the perforated columns is proposed.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114017"},"PeriodicalIF":6.6,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221519","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

Eigen-value analysis of Kresling modules: A systematic approach to designing arm-like origami structures Kresling模的特征值分析：一种设计臂状折纸结构的系统方法

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-21 DOI: 10.1016/j.tws.2025.114016

Seyed Masoud Alipour, Jamal Arghavani

{"title":"Eigen-value analysis of Kresling modules: A systematic approach to designing arm-like origami structures","authors":"Seyed Masoud Alipour, Jamal Arghavani","doi":"10.1016/j.tws.2025.114016","DOIUrl":"10.1016/j.tws.2025.114016","url":null,"abstract":"<div><div>This study introduces a systematic framework for the geometric design of arm-like origami structures constructed from Kresling modules, leveraging comprehensive mechanical modeling and eigenvalue analysis. A generalized six-degree-of-freedom (6-DOF) truss model is developed to capture both axial and off-axis deformations of the Kresling module under quasi-static loading conditions. The model enables accurate prediction of the module’s mechanical behavior and is validated through comparison with experimental and finite element results. By performing eigenvalue analysis on the linearized governing equations, the dominant deformation modes, specifically folding and bending, are identified, and their associated stiffness characteristics are quantified. These insights are used to construct a set of dimensionless design maps that link geometric parameters to mechanical performance, guiding the selection of module configurations tailored to specific application requirements. The proposed methodology supports the efficient and scalable design of adaptive, reconfigurable arm-like structures using symmetric bistable Kresling modules, with potential applications in soft robotics, deployable devices, and flexible mechanisms.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114016"},"PeriodicalIF":6.6,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220917","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

Assessment of a thin-web girder bridge subjected to distortion-induced fatigue utilising a vehicle-bridge dynamic interaction methodology based on the Eurocode FLM 4 基于欧洲规范flm4的车桥动力相互作用方法对薄壁梁桥变形疲劳的评估

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-21 DOI: 10.1016/j.tws.2025.114009

Ana Célia Soares da Silva , Marilene Lobato Cardoso , Guilherme Santana Alencar , José Guilherme Santos da Silva

{"title":"Assessment of a thin-web girder bridge subjected to distortion-induced fatigue utilising a vehicle-bridge dynamic interaction methodology based on the Eurocode FLM 4","authors":"Ana Célia Soares da Silva , Marilene Lobato Cardoso , Guilherme Santana Alencar , José Guilherme Santos da Silva","doi":"10.1016/j.tws.2025.114009","DOIUrl":"10.1016/j.tws.2025.114009","url":null,"abstract":"<div><div>Nowadays, many welded bridges are approaching their design operation life, with various fatigue-related damages becoming increasingly evident. On the other hand, the extensive inventory of highway bridges often necessitates the assessment of the remaining service life of aging or defective structures, to support the decision about whether to replace or reinforce them. In this context, there is a growing need for reliable methods to predict the fatigue life of welded components and accurately assess their long-term performance under fatigue loading. Thus, a computational tool called VBI (Vehicle-Bridge Interaction) was developed in MATLAB and comprising an interface with the finite element program ANSYS. It is important to emphasize that, while current design codes evaluate welded joints for fatigue life using primarily the Nominal Stress Method (NSM), this research utilises the Hot-spot Stress Method (HSM) for a more accurate definition of stress. In order to illustrate the application of the proposed analysis methodology, the details of a Finite Element (FE) global numerical model of a typical simply supported steel-concrete composite highway bridge are presented. Different damage scenarios based on the standard vehicle traffic prescribed by EN 1991-2: 2021 (Fatigue Load Model 4) are simulated with the proposed methodology considering the sub modelling technique combined with coarse FE models. An interesting and important structural detail mainly subjected to distortion-induced fatigue is investigated through sub modelling, thus allowing a more realistic approach to evaluate fatigue issues on thin-web girder bridges with typical web-gap details.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114009"},"PeriodicalIF":6.6,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic behaviors of engineering-scaled laser-welded pyramid lattice sandwich panels under close-in explosions 近距离爆炸作用下工程尺度激光焊接金字塔格芯板的动力特性

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-20 DOI: 10.1016/j.tws.2025.114014

Wenhao Wang , Jianhua Dong , Dongyu Shi , Jue Han , Hualin Fan

{"title":"Dynamic behaviors of engineering-scaled laser-welded pyramid lattice sandwich panels under close-in explosions","authors":"Wenhao Wang , Jianhua Dong , Dongyu Shi , Jue Han , Hualin Fan","doi":"10.1016/j.tws.2025.114014","DOIUrl":"10.1016/j.tws.2025.114014","url":null,"abstract":"<div><div>Pyramid lattice sandwich panels (PLSPs) could meet the requirements of lightweight and high resistance, which has significant advantages in defense engineering. This study aims to propose a practical method to manufacture large-scaled PLSPs through laser cutting and welding with dimension over 1.0 m. Stainless steel 2205 with yielding strength of 640 MPa was chosen as the base material to resist strong explosion impacts. The dynamic responses against explosion of PLSPs were investigated via experimental tests and numerical analyses. For PLSPs in this study, the critical scaled distance is 1.254 m/kg<sup>1/3</sup>. With the scaled distance decreasing, progressively buckling of the core occurs, followed by compaction, leading to large deformation of PLSPs. Finite element model (FEM) with damping was established, whose maximum displacement prediction error is less than 20 %. The energy dissipated by the front face sheet, the lattice core and the back face sheet is close to 20 %, over 50 % and over 30 % of the total energy dissipation, respectively. Compared with solid plate with equal mass, the displacement response of PLSPs shows significant attenuation over 80 % in elastic stage and over 20 % in plastic stage. Meanwhile, PLSPs exhibited smaller deformation compared to other large-scale sandwich panels with close dimensions tested under similar airburst conditions.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114014"},"PeriodicalIF":6.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159358","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

Seismic behavior of concrete-filled steel tube columns strengthened with CFRP grid and ECC CFRP格栅和ECC加固钢管混凝土柱的抗震性能

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-20 DOI: 10.1016/j.tws.2025.114012

Yuhong Yan, Pengpeng Wang, Dong Zhao, Zhenzhen Liu, Yiyan Lu

{"title":"Seismic behavior of concrete-filled steel tube columns strengthened with CFRP grid and ECC","authors":"Yuhong Yan, Pengpeng Wang, Dong Zhao, Zhenzhen Liu, Yiyan Lu","doi":"10.1016/j.tws.2025.114012","DOIUrl":"10.1016/j.tws.2025.114012","url":null,"abstract":"<div><div>This study presents an investigation aim at evaluating the seismic behavior of concrete-filled steel tube (CFST) columns strengthened with carbon fiber-reinforced polymer (CFRP) grid and engineered cementitious composite (ECC). Ten specimens were fabricated and tested under combined constant axial loads and cyclic lateral loads. The effects of the number of CFRP grid layers, diameter-to-thickness ratio of the steel tube, infilled concrete strength, and axial load ratio on the seismic behavior of the strengthened columns were analyzed. The results indicated that the strengthened columns exhibited ductile failure. The CFRP grid and ECC layer significantly prevented the local buckling of the steel tube. Although steel tube deformation at the plastic hinge region was minimal, the crushing of the infilled concrete demonstrated efficient utilization of material strength. After strengthening, the hysteretic curve of the columns became fuller, with lateral load-bearing capacity enhancements ranging from 16.7 % to 32.3 % and energy dissipation capacity increasing by 58.6 %. Increasing the number of CFRP grid layers improved the lateral load-bearing capacity of the strengthened columns but reduced ductility due to more brittle rupture of CFRP. When the axial load ratio was below 0.30, its increase slightly enhanced lateral load-bearing and energy dissipation capacities. However, as the axial load ratio reached 0.45, lateral load-bearing capacity, ductility, and energy dissipation capacity significantly decreased. Considering the confining effects of both the strengthening layer and steel tube on the concrete core, a prediction model for the skeleton curves of the strengthened columns was developed.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114012"},"PeriodicalIF":6.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145221524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic response analysis of free-span pipelines with strength degradation subjected to underwater explosion 水下爆炸作用下强度退化的自由跨管道动力响应分析

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-20 DOI: 10.1016/j.tws.2025.114013

Chenyang Wang, Wei Xiao, Xiongliang Yao, Xiaojian Chen, Hui Wang, Kaixiang Yao

{"title":"Dynamic response analysis of free-span pipelines with strength degradation subjected to underwater explosion","authors":"Chenyang Wang, Wei Xiao, Xiongliang Yao, Xiaojian Chen, Hui Wang, Kaixiang Yao","doi":"10.1016/j.tws.2025.114013","DOIUrl":"10.1016/j.tws.2025.114013","url":null,"abstract":"<div><div>After the explosion incident of the Nord Stream natural gas pipeline, the safety of free-span pipelines has attracted extensive attention from the international community. However, there are few studies on the problem of pipeline underwater explosion (UNDEX), and the influence of strength degradation caused by vortex-induced vibration (VIV) fatigue damage on the pipeline has been ignored. Based on the strength degradation model and the VIV mechanism, this study proposes a method for solving the residual strength of three-dimensional free-span pipelines. Taking into comprehensive consideration the fatigue-induced strength degradation of pipelines caused by VIV and the intense impact of UNDEX loads, this study systematically investigates the damage evolution process and deformation behavior of free-span pipelines subjected to UNDEX loading through numerical simulation methods. The results show that VIV fatigue damage can degrade the yield strength of the pipeline with 18 years of service from 448 MPa to 378 MPa. Strength degradation aggravates the structural response to UNDEX loads, and the response rate exhibits exponential growth. In addition, the influence of key factors such as the explosive equivalent, detonation location, and the hydrostatic pressure on the pipeline damage effect is discussed, which provides an important theoretical basis for the blast-resistant design and safety assessment of free-span pipelines in complex marine environments.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114013"},"PeriodicalIF":6.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145159355","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

Benchmarking the debonding resistance of large-scale thermal protection system composite panels under three-point bending using multi-camera digital image correlation 采用多相机数字图像相关技术对大型热防护系统复合板三点弯曲下的脱粘抗力进行了基准测试

IF 6.6 1区工程技术

Thin-Walled Structures Pub Date : 2025-09-20 DOI: 10.1016/j.tws.2025.114015

Yi Luo , Shibo Yan , Tengfei Xu , Han Liu , Xiquan Zhu , Bing Pan

{"title":"Benchmarking the debonding resistance of large-scale thermal protection system composite panels under three-point bending using multi-camera digital image correlation","authors":"Yi Luo , Shibo Yan , Tengfei Xu , Han Liu , Xiquan Zhu , Bing Pan","doi":"10.1016/j.tws.2025.114015","DOIUrl":"10.1016/j.tws.2025.114015","url":null,"abstract":"<div><div>During prolonged atmospheric entry/re-entry of hyper Mach aircraft, maintaining the structural integrity of the thermal protection system (TPS) is of critical importance for safe flight. Large-scale TPSs are subjected to bending loads induced by fuselage flexure and pressure differentials, resulting in bending deformation. TPS debonding from the aircraft may occur when the interfacial stresses induced by structural deformation exceed the bonding load-bearing capacity, severely compromising flight safety. This study conducts a benchmarking experimental investigation on the debonding resistance of aerogel-based and phenolic impregnated carbon ablator (PICA)-based TPS. The debonding resistance of aerogel-based and PICA-based TPS composite panels was quantified and compared through three-point bending tests. Additionally, multi-camera digital image correlation (MC-DIC) was employed to investigate debonding mechanisms. The comprehensive experiments conclusively establish that aerogel-based TPS composite panels exhibit enhanced debonding resistance to PICA-based TPS composite panels, attributable to the higher bending compliance of aerogel-based TPS composite panels, which mitigates localized strain accumulation and effectively delays debonding initiation. These findings provide crucial insights for optimizing debonding resistance in advanced TPS.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"218 ","pages":"Article 114015"},"PeriodicalIF":6.6,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119374","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