Archives of Civil and Mechanical Engineering最新文献_第7页

Feasibility of laser cladding for tooling repair in aerospace manufacturing: an alternative to chrome plating 航空制造中激光熔覆模具修复的可行性：镀铬的替代品

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-18 DOI: 10.1007/s43452-024-01110-5

Piotr Koruba, Marek Pawlicki, Adrian Mróz, Radosław Szewczyk, Jacek Reiner

{"title":"Feasibility of laser cladding for tooling repair in aerospace manufacturing: an alternative to chrome plating","authors":"Piotr Koruba, Marek Pawlicki, Adrian Mróz, Radosław Szewczyk, Jacek Reiner","doi":"10.1007/s43452-024-01110-5","DOIUrl":"10.1007/s43452-024-01110-5","url":null,"abstract":"<div><p>Advanced remanufacturing by additive manufacturing is challenging in aerospace due to the minimization of material costs, preparation times and metal waste. This study analyzed a 40HM low-alloy steel ring as a demo tooling used to produce aircraft engine components. The possibility of using laser cladding with powder process with the additive material NiCrBSi alloy powder was analyzed. Optimal parameters of the process were selected in terms of the assumed structural requirements (geometrical parameters of the clad, its hardness and the size of the heat-affected zone) for the remanufactured surfaces, ultimately obtaining a crack-free multilayer coating with a thickness of 2 mm and a hardness of above 700 HV1. The remanufacturing process was performed on three representative surfaces: flat face, cylindrical external, and internal. This approach allowed an analysis of the possibilities of finishing the laser-deposited layers with the machining methods used in the actual tooling department of the aerospace company: turning, milling, grinding, and center grinding. During chip processing, the defects (holes, cracks) made machining difficult and ineffective, mainly due to accelerated tool wear. Single cracks were observed after the grinding operation, which may reduce the durability of the remanufacturing layer. Both the changes in the microstructure of the demo component and the phases present in the cladding were analyzed. The deposition process was found to form a martensitic structure in the substrate at the cross-section in proximity to the remanufactured surfaces. This was also confirmed by an increase in average hardness from 402 HV1 to 605 HV1 for the analyzed substrate areas.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43452-024-01110-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Moisture and size dependence of thermal deformation in cement and asphalt mortar 水泥和沥青砂浆热变形的水分和尺寸依赖性

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-16 DOI: 10.1007/s43452-024-01046-w

Qiang Fu, Haonan Zhou, Youjun Xie, Xiling Zhou, Keren Zheng

{"title":"Moisture and size dependence of thermal deformation in cement and asphalt mortar","authors":"Qiang Fu, Haonan Zhou, Youjun Xie, Xiling Zhou, Keren Zheng","doi":"10.1007/s43452-024-01046-w","DOIUrl":"10.1007/s43452-024-01046-w","url":null,"abstract":"<div><p>Cement and asphalt (CA) mortar is a key structural material for high-speed railway slab ballastless tracks. To investigate the deformation property of CA mortar in the range of − 20–60 °C, a DIL402C thermal expansion instrument and a self-designed thermal deformation tester were used in this paper, and the thermal deformation mechanism was revealed by combining the dynamic thermal analysis technology, the relationship between the deformation and mass under cyclic temperature variation, and the microstructural testing. The results indicated that the thermal expansion deformation of CA mortar decreased as the moisture content increased. Under vacuum-drying, air-drying, and water saturation state, the thermal expansion strain ranges of CA mortar specimens with different sizes were 1.0248–1.4340 × 10<sup>–3</sup>, 0.4438–1.3669 × 10<sup>–3</sup>, and − 2.1815–0.5571 × 10<sup>–3</sup>, respectively. The smaller the specimen size, the more significant the thermal shrinkage deformation caused by the increased humidity. The thermal expansion coefficient of CA mortar increased gradually during the initial heating process and then changed in a complicated manner with changes in the humidity. As a porous material with asphalt as the continuous phase, when the temperature increases, the volume expansion of ice, the melting of ice into water, the migration and evaporation of water, the phase change of asphalt, and the volume expansion of cement mortar jointly affect the overall deformation property of CA mortar.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Size-dependent buckling of multidirectional porous metal foam nanoshells resting on an orthotropic elastic foundation 正交各向异性弹性地基上多向多孔金属泡沫纳米壳的尺寸依赖性屈曲

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-12 DOI: 10.1007/s43452-024-01074-6

Mohammed Y. Tharwan, Ahmed Amine Daikh, Amr E. Assie, Ali Alnujaie, Mohamed A. Eltaher

{"title":"Size-dependent buckling of multidirectional porous metal foam nanoshells resting on an orthotropic elastic foundation","authors":"Mohammed Y. Tharwan, Ahmed Amine Daikh, Amr E. Assie, Ali Alnujaie, Mohamed A. Eltaher","doi":"10.1007/s43452-024-01074-6","DOIUrl":"10.1007/s43452-024-01074-6","url":null,"abstract":"<div><p>This research addresses challenges in theoretical modeling of complex metal foam nanoshell structures and introduces a more accurate approach. It utilizes a nonclassical nanomechanics continuum approach to model novel tridirectionally porous metal foam nanoshell structures with varying microstructures, incorporating intrinsic characteristic lengths and spatial variations in material properties. The research endeavors to analyze the buckling response exhibited by multidirectional functionally graded (FG) porous metal foam nanoshells resting on an orthotropic elastic foundation. Employing the nonlocal higher-order strain gradient theory in conjunction with the principle of virtual work, the study establishes static stability equilibrium equations. Methodologically, the Galerkin method is applied to derive analytical solutions for critical buckling loads under diverse boundary conditions. Within the scope of investigation, two distinct types of porous shells are examined: softcore (SC) and hardcore (HC). These shells are further characterized by five distribution patterns: tridirectional (Type-A), bidirectional (Type-B and Type-C), transverse unidirectional (Type-D), and axial unidirectional (Type-E). This model demonstrates its efficacy in analyzing and designing shell element structures across a broad spectrum of industries, including motorcycle helmet manufacturing, petrochemical processing, aerospace engineering, and civil construction.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vibration characteristics of a sandwich plate with viscoelastic auxetic core and graphene nanoplatelets reinforced skins 粘弹性增氧芯和石墨烯纳米片增强皮夹层板的振动特性

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-11 DOI: 10.1007/s43452-024-01072-8

Nima Namazinia, Akbar Alibeigloo, Mahsa Karimiasl

{"title":"Vibration characteristics of a sandwich plate with viscoelastic auxetic core and graphene nanoplatelets reinforced skins","authors":"Nima Namazinia, Akbar Alibeigloo, Mahsa Karimiasl","doi":"10.1007/s43452-024-01072-8","DOIUrl":"10.1007/s43452-024-01072-8","url":null,"abstract":"<div><p>The present research aims to examine the free vibrational behavior of a sandwich plate comprising a viscoelastic auxetic core and functionally graded graphene nanoplatelets reinforced composite (FG-GPLRC) face layers, which are rested on a Winkler–Pasternak foundation. The macro-mechanical characteristics of the plate’s skins have been determined utilizing the Halpin–Tsai theory. Additionally, for the core layer, besides the features characterized using Gibson’s model, the Zener model is employed to describe its viscoelastic behavior. The equations of motion for the sandwich plate were derived based on Reddy’s third-order shear deformation theory (TSDT), and they were solved using the Galerkin method. To validate the numerical results of the current study, they have been compared with findings documented in prior ones. Overall, the effects of several parameters such as geometrical parameters, various GPL distribution patterns, boundary conditions, Winkler–Pasternak coefficients, and the volume fractions of GPL have been investigated on the natural frequency and loss factor of the sandwich plate.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effect of Cu addition on microstructure, wear, and corrosion resistance of AlCoCrFeNiSi0.5Cux (x = 0.01, 0.05, 0.1) high-entropy alloys Cu添加对AlCoCrFeNiSi0.5Cux （x = 0.01, 0.05, 0.1）高熵合金组织、磨损和耐蚀性的影响

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-10 DOI: 10.1007/s43452-024-01102-5

Rafał Babilas, Mariola Kądziołka-Gaweł, Anna Bajorek, Piotr Gębara, Adrian Radoń, Tymon Warski, Oktawian Bialas, Monika Spilka, Wojciech Łoński, Katarzyna Młynarek-Żak

{"title":"Effect of Cu addition on microstructure, wear, and corrosion resistance of AlCoCrFeNiSi0.5Cux (x = 0.01, 0.05, 0.1) high-entropy alloys","authors":"Rafał Babilas, Mariola Kądziołka-Gaweł, Anna Bajorek, Piotr Gębara, Adrian Radoń, Tymon Warski, Oktawian Bialas, Monika Spilka, Wojciech Łoński, Katarzyna Młynarek-Żak","doi":"10.1007/s43452-024-01102-5","DOIUrl":"10.1007/s43452-024-01102-5","url":null,"abstract":"<div><p>The influence of copper addition on the structure and selected properties of AlCoCrFeNiSi<sub>0.5</sub>Cu<sub>x</sub> high-entropy alloys is described. Slowly cooled ingots were prepared by induction melting, and the samples in the form of plates were obtained by pressure casting. The conducted structural studies confirmed the presence of BCC/B2 phase. Microsegregation in the ingots was associated with the formation of intermetallic Cr<sub>3</sub>Si and Fe<sub>5</sub>Si<sub>3</sub> phases. An increase in the cooling rate stopped segregation by reducing the mobility of Cr and Si. The hyperfine magnetic field distributions indicated the formation of the BCC Fe(Co,Ni,Si,Cr) solid solution for alloys in the form of plates. The lowest corrosion-current density (0.04 μA/cm<sup>2</sup>) in 3.5%-NaCl solution was obtained for the plate with the lowest copper content. The dominated aluminum surface states for the post-corrosive plates highlighted the binding energies of Al<sub>2</sub>O<sub>3</sub>. A tendency of reduced coercivity with increased copper content was observed. The positive effect of copper addition on wear resistance was confirmed for the AlCoCrFeNiSi<sub>0.5</sub>Cu<sub>0.1</sub> alloy.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s43452-024-01102-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 study and prediction of uniaxial compression behavior of the novel UHPC reinforced with BFRP minibars BFRP迷你棒增强新型UHPC单轴压缩性能试验研究及预测

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-10 DOI: 10.1007/s43452-024-01101-6

Zhiyuan Chen, Xin Wang, Lining Ding, Kaidi Jiang, Chang Su, Huang Huang, Qingguo Ben, Zhishen Wu

{"title":"Experimental study and prediction of uniaxial compression behavior of the novel UHPC reinforced with BFRP minibars","authors":"Zhiyuan Chen, Xin Wang, Lining Ding, Kaidi Jiang, Chang Su, Huang Huang, Qingguo Ben, Zhishen Wu","doi":"10.1007/s43452-024-01101-6","DOIUrl":"10.1007/s43452-024-01101-6","url":null,"abstract":"<div><p>In order to gain the stress–strain relationship of ultra-high performance concrete (UHPC) reinforced with basalt fiber reinforced polymer (BFRP) minibars under uniaxial compression, nine kinds of UHPC mixtures with BFRP minibars were designed. In addition, other three kinds of UHPC mixtures were designed to study the effect of fiber modulus on uniaxial compression behavior, the UHPC which were reinforced with no fiber, polypropylene (PP) fibers and steel fibers, respectively. The flowability, porosity, elastic modulus, compressive strength and toughness of UHPC were systematically tested and analyzed. Based on the test results, BFRP minibar significantly enhance the uniaxial compression behavior of UHPC, the stress–strain relationship was gained and it was expressed by a classical model with a good agreement, resulting in a promotion of the structural design for UHPC structures. The compressive strength increased with fibers modulus, content, aspect ratio, and bonding strength between UHPC and fibers. A semi-empirical model with a relative error rate less than 15% was proposed for compressive strength prediction, the model which was based on fibers modulus, content, aspect ratio, and bonding strength. The findings based on this research could enrich the technical basis for the performance design of UHPC in practical applications.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Alternating current curing of conductive fly ash-slag geopolymer mortars: performance, characterization and optimization 导电粉煤灰-矿渣地聚合物砂浆的交流养护：性能、表征及优化

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-09 DOI: 10.1007/s43452-024-01103-4

Beyza Fahriye Aygun, Mucteba Uysal, Turhan Bilir, Turgay Çoşgun, Hasan Dilbas

{"title":"Alternating current curing of conductive fly ash-slag geopolymer mortars: performance, characterization and optimization","authors":"Beyza Fahriye Aygun, Mucteba Uysal, Turhan Bilir, Turgay Çoşgun, Hasan Dilbas","doi":"10.1007/s43452-024-01103-4","DOIUrl":"10.1007/s43452-024-01103-4","url":null,"abstract":"<div><p>This research seeks to pinpoint the most robust series by subjecting geopolymer mortars (GMs) to electrical curing (AC) at 20 V based on different NaOH concentrations and GBFS/FA ratios. To enhance the electrical conductivity of GMs displaying optimal mechanical properties, carbon fiber (CF), steel fiber (SF), waste wire erosion (WWE) (0.25%, 0.50%, and 0.75%), and carbon black (CB) (1%, 2%, and 3%) were introduced into the chosen series. A comprehensive assessment encompassing compressive strength, flexural strength, ultrasonic pulse velocities, direct tensile strength and splitting tensile strengths were conducted on mixtures undergoing 24 h of AC. The study's findings indicated a substantial improvement in mechanical properties through electrical curing compared to ambient curing conditions. Notably, a correlation of up to 99% was established between direct and splitting tensile properties. The investigation revealed that the highest compressive strength, reaching 72.41 MPa at 1 day strength, was achieved through the thermal curing method with electric curing, particularly in the 100GBFS series. On the other hand, the optimum bending strength, approximately 19 MPa, was observed in the SFA075WWE series. These results highlight the efficacy of the thermal curing method with electric curing in enhancing the compressive strength of the 100GBFS series and the flexural strength of the SFA075WWE series, underscoring the potential benefits of specific curing methods for different series within the study.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Mechanical properties and microstructure of hybrid alkali-activated cement component 杂化碱活化水泥组分的力学性能和微观结构

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-06 DOI: 10.1007/s43452-024-01054-w

Murat Dener, Mehmet Karatas, Jinyan Shi, Mehrzad Mohabbi

{"title":"Mechanical properties and microstructure of hybrid alkali-activated cement component","authors":"Murat Dener, Mehmet Karatas, Jinyan Shi, Mehrzad Mohabbi","doi":"10.1007/s43452-024-01054-w","DOIUrl":"10.1007/s43452-024-01054-w","url":null,"abstract":"<div><p>Portland cement (PC), which has been used as a dominant binder material in concrete since its development, is responsible for approximately 8% of global anthropological CO<sub>2</sub> emissions. Alkali-activated materials, which are based on the activation of precursor materials using alkali activators, are binders developed for environmental gains. The significance of this study lies in exploring the mechanical and microstructure properties of hybrid alkali-activated cements containing PC, produced under various parameters. This investigation provides valuable insights into optimizing the composition and processing conditions for these materials. In this study, 34 mixtures were produced to investigate the Na<sub>2</sub>SiO<sub>3</sub> to NaOH ratio (2, 2.5, and 3), PC substitution level (5%, 10%, 15%, 20%, and 25%) and curing temperature (25, 50, 75 and 100 °C) effects on the hybrid alkali-activated slag/PC components. The highest compressive strength was obtained at 15% PC substitution. As the Na<sub>2</sub>SiO<sub>3</sub> to NaOH ratio increased, the compressive strength of the samples containing 0, 5%, 10% and 15% PC increased. However, the increase in the Na<sub>2</sub>SiO<sub>3</sub> to NaOH ratio negatively affected the compressive strength of the samples containing more than 15% PC. The highest compressive strength in both partially PC-substituted and fully slag samples was achieved when the samples were cured at 50 °C. When the sample containing 100% slag was cured at 50 °C, the degree of hydration was higher compared to the sample cured at 25 °C. In the sample with 15% PC, a sharp band corresponding to the Si–O bond was observed at 25 °C. However, as the curing temperature exceeded 50 °C, this band became broader and weaker. This indicates that the amount of hydration products in the PC-blended alkali-activated slag sample decreased at curing temperatures above 50 °C.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 microstructure evolution and recrystallization behavior of nickel-based superalloy robot abrasive belt grinding surface under high-temperature exposure 高温暴露下镍基高温合金机器人砂带磨削表面组织演变及再结晶行为研究

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-04 DOI: 10.1007/s43452-024-01064-8

Weijian Zhang, Yadong Gong, Xianli Zhao, Mingjun Liu, Liya Jin, Guoqiang Yin, Jibin Zhao

{"title":"Study on microstructure evolution and recrystallization behavior of nickel-based superalloy robot abrasive belt grinding surface under high-temperature exposure","authors":"Weijian Zhang, Yadong Gong, Xianli Zhao, Mingjun Liu, Liya Jin, Guoqiang Yin, Jibin Zhao","doi":"10.1007/s43452-024-01064-8","DOIUrl":"10.1007/s43452-024-01064-8","url":null,"abstract":"<div><p>The interference between grits and workpiece material during the nickel-based superalloy robot abrasive belt grinding process can cause plastic deformation on the grinding surface, and the evolution of surface deformation microstructure under high-temperature conditions can affect the surface properties of superalloys. Therefore, a high-temperature exposure experiment is devised in this paper, and electron backscatter diffraction (EBSD) and scanning electron microscopy (SEM) are used as characterization methods to study the microstructure evolution characteristics and recrystallization behavior of nickel-based superalloy robot abrasive belt grinding surface under high-temperature exposure. In addition, the effects of grinding factors (abrasive belt grit size and normal contact force) on high-temperature exposure recrystallization of grinding surface are explored. The research results indicate that under high-temperature exposure, the surface deformation microstructure consumes dislocations and releases stored energy, evolving into fine equiaxed recrystallized grains within the original grains through subgrain growth nucleation and grain boundary migration. Meanwhile, the recrystallization process is accompanied by twin formation. The recrystallization process is affected by the exposure temperature and time, and exposure temperature has a decisive influence on recrystallization. Furthermore, both the abrasive belt grit size and normal contact force have a profound influence on the recrystallized grain size and the recrystallization area depth.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Impact performance and damage assessment of GFRP-RC columns at high temperatures: a numerical insight 高温下GFRP-RC柱的冲击性能和损伤评估：数值分析

IF 4.4 3区工程技术

Archives of Civil and Mechanical Engineering Pub Date : 2024-12-02 DOI: 10.1007/s43452-024-01100-7

Liu Jin, Xi Li, Renbo Zhang, Xiuli Du

{"title":"Impact performance and damage assessment of GFRP-RC columns at high temperatures: a numerical insight","authors":"Liu Jin, Xi Li, Renbo Zhang, Xiuli Du","doi":"10.1007/s43452-024-01100-7","DOIUrl":"10.1007/s43452-024-01100-7","url":null,"abstract":"<div><p>Fiber-reinforced polymer (FRP) bars have better resistance to corrosion and higher tensile strength than steel bars, thus being a prospective material for concrete structures in marine engineering. However, it is less fire-resistant, and the residual bearing capacity of FRP-reinforced concrete members after the fire needs to be clarified. This study explores the impact resistance of Glass FRP-reinforced concrete (GFRP-RC) columns at high temperatures using finite element models. To assess the accuracy of the model, the simulation results were compared with the test results in terms of fire resistance and impact resistance, respectively. Based on these, the impact behavior of GFRP-RC and steel-RC columns were compared and analyzed. The results show that GFRP-RC columns were more severely damaged by impact loading after high temperatures than steel-RC columns. The peak impact forces of the GFRP-RC columns and steel-RC columns are nearly identical. However, the former has a smaller reaction force and a more significant mid-span displacement. Furthermore, the residual axial bearing capacity of GFRP-RC columns after high temperature and impact loading is significantly reduced compared to steel-RC columns. Exposure to high temperatures takes a more significant proportion in the reduction than impact loading. In addition, a relationship between the damage index (based on residual bearing capacity) and the lateral displacement of the columns after fire and impact loadings was established. In contrast, the corresponding damage classification criteria were determined.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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