International Journal of Structural Integrity最新文献_第10页

An investigation of the effects of aspect ratio and opening on CSPSW and TSCSW 纵横比和开口对CSPSW和TSSSW影响的研究

IF 2.7

International Journal of Structural Integrity Pub Date : 2022-02-25 DOI: 10.1108/ijsi-01-2022-0004

M. Labibzadeh, M. Bagheri, A. Khademalrasoul, K. Hossain

{"title":"An investigation of the effects of aspect ratio and opening on CSPSW and TSCSW","authors":"M. Labibzadeh, M. Bagheri, A. Khademalrasoul, K. Hossain","doi":"10.1108/ijsi-01-2022-0004","DOIUrl":"https://doi.org/10.1108/ijsi-01-2022-0004","url":null,"abstract":"PurposeThis paper aims to study, the effects of opening shape, size and position as well as the aspect (height-to-length) ratio on the shear capacity, stiffness, ductility and energy dissipation capacity of triple-skin profiled steel-concrete composite shear wall (TSCSW) and investigate and compare them to those of concrete-stiffened steel plate shear walls (CSPSW). Two kinds of opening, circular and square, with different sizes and positions and two aspect ratios of 1:1 and 3:1 are considered in the simulations.Design/methodology/approachThis study presents a novel TSCSW and compares its behavior with the existing CSPSW under the effect of monotonic and cyclic loadings. TSCSW is composed of three corrugated steel plates filled with concrete. The two external side plates are connected to the concrete core by means of several intermediate fasteners and the third one is an inner steel plate embedded within the concrete panel. The internal plate is a buckling restrained plate surrounded by concrete. This is the main superiority of TSCSW over other kinds of existing composite shear walls.FindingsThe results show that the shear capacity and the energy dissipation capacity of the proposed composite wall, TSCSW, are respectively about 16 and 12% higher than those of CSPSW when there is no opening. If an opening is considered in the wall, as the size of the opening is increased, the shear capacity, stiffness, ductility and absorbed energy of the two walls are decreased similarly. The destructive effect of square openings on the performance of the walls is more than that of circular openings.Originality/valueThis is an original work.","PeriodicalId":45359,"journal":{"name":"International Journal of Structural Integrity","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41831073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Piston ring performance II: measurement of cavitation shapes in different operating conditions and their link to lubricant properties 活塞环性能II：不同操作条件下空化形状的测量及其与润滑剂性能的关系

IF 2.7

International Journal of Structural Integrity Pub Date : 2022-02-14 DOI: 10.1108/ijsi-09-2021-0095

Polychronis Spyridon Dellis

{"title":"Piston ring performance II: measurement of cavitation shapes in different operating conditions and their link to lubricant properties","authors":"Polychronis Spyridon Dellis","doi":"10.1108/ijsi-09-2021-0095","DOIUrl":"https://doi.org/10.1108/ijsi-09-2021-0095","url":null,"abstract":"PurposeThis study aims to compare cavitation shapes between the simulating test rig and the engines to strengthen the findings that were first observed in the simplified experiments. Different forms of cavitation were identified, and their shape and size (length and width) were dictated from reciprocating speed and viscosity of the lubricant. Cavitation degrades performance in engineering applications and its effect is that it alters the oil film pressure.Design/methodology/approachLubricant formulations were used for parametric study as well as different operating testing parameters in a simulating test rig and single cylinder engines with visualisation windows. An algorithm was used for extracting cavitation data from imaging, and comparison was made.FindingsSimilar phenomena at the simulating test rig and the engine were investigated and compared. The effect of different operating conditions was assessed along with the variations produced from the parametric lubricant study.Research limitations/implicationsEngine results are limited due to manufacturing difficulties of visualisation windows and oil starvation. Firing tests are another difficult challenge as the modified section pressure is under more pressure and the window view is affected by combustion process. Limited pictures can be captured before cleaning is required. A lubricant manufacturer has to provide data regarding the chemistry of the lubricants.Originality/valueThe effect of cavitation in piston ring lubrication along with variable operating and lubricant parameters is further studied with quantification of cavitation results through image processing. These forms of cavities are affected by lubricant properties and operating conditions. A link between viscosity, cavitation, shear thinning properties, oil film thickness (OFT) and friction is given.","PeriodicalId":45359,"journal":{"name":"International Journal of Structural Integrity","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47213548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A reliability analysis strategy for main shaft of wind turbine using importance sampling and Kriging model 基于重要性抽样和克里格模型的风机主轴可靠性分析策略

IF 2.7

International Journal of Structural Integrity Pub Date : 2022-02-07 DOI: 10.1108/ijsi-01-2022-0006

L. Ling, Yan Li, Sicheng Fu

引用次数: 5

Fracture properties of fibrous self compacting concrete using three-point bend test and wedge splitting test methods 用三点弯曲试验和楔形劈裂试验方法研究纤维自密实混凝土的断裂特性

IF 2.7

International Journal of Structural Integrity Pub Date : 2022-01-26 DOI: 10.1108/ijsi-08-2021-0093

B. Raja Rajeshwari, M. Sivakumar

{"title":"Fracture properties of fibrous self compacting concrete using three-point bend test and wedge splitting test methods","authors":"B. Raja Rajeshwari, M. Sivakumar","doi":"10.1108/ijsi-08-2021-0093","DOIUrl":"https://doi.org/10.1108/ijsi-08-2021-0093","url":null,"abstract":"PurposeFracture properties of concrete are mainly influenced by specimen shape, size and type of testing method. The study aims to identify the characteristic divergence in fracture – evaluating testing methods, i.e. three-point bend test and wedge splitting test for fibrous self-compacting concrete.Design/methodology/approachA total of nine mixes with three different coarse aggregate sizes (20, 16 and 12.5mm) and three coarse to fine aggregate quantities (40–60, 45–55 and 50–50) were considered to examine the influence of materials on fracture parameters of fibrous self-compacting concrete. For three-point bend test, size effect method was considered to analyze the fracture properties.FindingsThe experimental investigation revealed that fracture energy calculated from wedge splitting test was reasonably on higher side for maximum coarse aggregate-based specimens for all coarse to fine aggregate quantities, while for the size effect method, fracture energy value was maximum for least coarse aggregate sized specimens.Originality/valueThe fracture properties of fibrous self-compacting concrete obtained from wedge splitting test method was higher than the size effect method. This is due to the consideration of only peak load for determining the fracture properties in size effect method analysis.","PeriodicalId":45359,"journal":{"name":"International Journal of Structural Integrity","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44932588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation and prediction of material fatigue characteristics under impact loads: review and prospects 冲击载荷下材料疲劳特性的评价与预测：回顾与展望

IF 2.7

International Journal of Structural Integrity Pub Date : 2022-01-17 DOI: 10.1108/ijsi-10-2021-0112

Xintian Liu, Que Wu, Sheng-Hao Su, Yansong Wang

引用次数: 32

Development of a photomicroscope method for in situ damage monitoring under ultrasonic fatigue test 超声疲劳试验损伤原位监测显微方法的研制

IF 2.7

International Journal of Structural Integrity Pub Date : 2022-01-05 DOI: 10.1108/ijsi-12-2021-0129

K. Tan, Victor Postel, Yujia Liu, D. Yang, S. Tang, Chong Wang, Qingyuan Wang

{"title":"Development of a photomicroscope method for in situ damage monitoring under ultrasonic fatigue test","authors":"K. Tan, Victor Postel, Yujia Liu, D. Yang, S. Tang, Chong Wang, Qingyuan Wang","doi":"10.1108/ijsi-12-2021-0129","DOIUrl":"https://doi.org/10.1108/ijsi-12-2021-0129","url":null,"abstract":"PurposeMechanical issues related to the information and growth of small cracks are considered to play a major role in very high cycle fatigue (VHCF) for metallic materials. Further efforts on better understanding in early stage of a crack are beneficial to estimating and preventing catastrophic damage for a long period service.Design/methodology/approachDependent on the ultrasonic loading system, a novel method of in situ photomicroscope is established to study the crack behaviors in VHCF regime.FindingsThis in situ photomicroscope method provides advantages in combination with fatigue damage monitoring at high magnification, a large number of cycles, and efficiency. Visional investigation with attached image proceeding code proves that the method has high resolution on both size and time, which permits reliable accuracy on small crack growth rate. It is observed that the crack propagation trends slower in the overall small crack stage down to the level of 10–11 m/cycle. Strain analysis relays on a real-time recording which is applied by using digital image correlation. Infrared camera recording indicates the method is also suitable for thermodynamic study while growth of damage.Originality/valueBenefiting from this method, it is more convenient and efficient to study the short crack propagation in VHCF regime.","PeriodicalId":45359,"journal":{"name":"International Journal of Structural Integrity","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49352841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Response of multistory steel structure subjected to differential settlements of its foundation 多层钢结构在地基差沉降作用下的响应

IF 2.7

International Journal of Structural Integrity Pub Date : 2021-12-23 DOI: 10.1108/ijsi-08-2021-0083

A. Hanna, Wenxue Chen

{"title":"Response of multistory steel structure subjected to differential settlements of its foundation","authors":"A. Hanna, Wenxue Chen","doi":"10.1108/ijsi-08-2021-0083","DOIUrl":"https://doi.org/10.1108/ijsi-08-2021-0083","url":null,"abstract":"PurposeThis article aims to address an outstanding problem dealing with the structure and its foundation.Design/methodology/approachDifferential settlement between foundation units of a multistory structure has been responsible for serious damage to buildings and often catastrophic failure and loss of life. The dynamic changes in the loading conditions of the structure, and the variability of the underlying ground due to environmental changes, are causing the undesirable differential settlement, which is manifested in the form of additional stresses in beams, columns and distortion of the structure elements. The structural response to the differential settlements depends on the type of the structure (concrete or steel), type of beam-to-column connections (rigid or semi-rigid), number of floors and the spans of the beams in the building. This paper presents the results of a numerical model, which was developed using the finite element technique and the software “ABAQUS” to analyze a nine-floor steel structure. The model was capable to capture the stresses and the strains developed in beams and columns and the relationships of moment–settlement and rotation–settlement for the structural during the differential settlement of its foundation. After validating of the model, data were produced for a wide range of governing parameters for rigid and semi-rigid connections and accordingly the mode of failure. The results can be used as a guideline for the design of steel structures.FindingsResults are useful for those design steel structures.Research limitations/implicationsThis study is based on the experimental and numerical data of the authors.Practical implicationsThis study provides a guideline for the design of steel structures.Originality/valueThis is the original research developed by the authors.","PeriodicalId":45359,"journal":{"name":"International Journal of Structural Integrity","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46048014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Recent advances in reliability analysis of aeroengine rotor system: a review 航空发动机转子系统可靠性分析研究进展综述

IF 2.7

International Journal of Structural Integrity Pub Date : 2021-12-21 DOI: 10.1108/ijsi-10-2021-0111

Xue-Qin Li, Lukai Song, Guangchen Bai

{"title":"Recent advances in reliability analysis of aeroengine rotor system: a review","authors":"Xue-Qin Li, Lukai Song, Guangchen Bai","doi":"10.1108/ijsi-10-2021-0111","DOIUrl":"https://doi.org/10.1108/ijsi-10-2021-0111","url":null,"abstract":"PurposeTo provide valuable information for scholars to grasp the current situations, hotspots and future development trends of reliability analysis area.Design/methodology/approachIn this paper, recent researches on efficient reliability analysis and applications in complex engineering structures like aeroengine rotor systems are reviewd.FindingsThe recent reliability analysis advances of engineering application in aeroengine rotor system are highlighted, it is worth pointing out that the surrogate model methods hold great efficiency and accuracy advantages in the complex reliability analysis of aeroengine rotor system, since its strong computing power can effectively reduce the analysis time consumption and accelerate the development procedures of aeroengine. Moreover, considering the multi-objective, multi-disciplinary, high-dimensionality and time-varying problems are the common problems in various complex engineering fields, the surrogate model methods and its developed methods also have broad application prospects in the future.Originality/valueFor the strong demand for efficient reliability design technique, this review paper may help to highlights the benefits of reliability analysis methods not only in academia but also in practical engineering application like aeroengine rotor system.","PeriodicalId":45359,"journal":{"name":"International Journal of Structural Integrity","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43378317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 61

Effect of randomly dispersed short fibers on the flexural resistance factor of concrete beams reinforced with GFRP bars 随机分布短纤维对GFRP筋混凝土梁抗弯系数的影响

IF 2.7

International Journal of Structural Integrity Pub Date : 2021-12-16 DOI: 10.1108/ijsi-07-2021-0069

B. Behnam, M. Al-Iessa

{"title":"Effect of randomly dispersed short fibers on the flexural resistance factor of concrete beams reinforced with GFRP bars","authors":"B. Behnam, M. Al-Iessa","doi":"10.1108/ijsi-07-2021-0069","DOIUrl":"https://doi.org/10.1108/ijsi-07-2021-0069","url":null,"abstract":"Purpose The purpose of this paper is to investigate the potential design advantage in terms of resistance factors for normal weight concrete beams containing moderate-dose randomly dispersed short fibers and reinforced with glass fiber reinforced polymer (GFRP) bars.Design/methodology/approach An analytical model based on the current code specifications is used to calculate the moment capacity of over-reinforced sections. The vast majority of the considered beams are over-reinforced, compression-controlled. The data of the fiber-reinforced concrete (FRC) reinforced with GFRP bars are collected from three published research studies which are based on experimentally tested results. Three different types of short fibers with four volume fractions are considered. Probabilistic model is established to conduct reliability-based calibration using Monte-Carlo Simulation. Limit state function, relevant load and resistance random variables are identified, and adequate statistical parameters are selected. Target reliability index consistent with the one used to develop current design code specifications is used.Findings Reliability analysis and calibration process are carried out with the intention of estimating the flexural resistance factors for FRC beams reinforced with GFRP bars.Originality/value The predicted flexural resistance factors ranged from 0.72 to 0.95, giving the resistance factors the potential to be increased above the currently specified value of 0.65 for compression-controlled members reinforced with FRP bars.","PeriodicalId":45359,"journal":{"name":"International Journal of Structural Integrity","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49490114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A study of wire tool surface topography and optimization of wire electro-spark machined UNS N06690 using the federated mode of RSM-ANN 基于RSM-ANN联合模式的电火花加工UNS N06690线刀具表面形貌及优化研究

IF 2.7

International Journal of Structural Integrity Pub Date : 2021-12-10 DOI: 10.1108/ijsi-09-2021-0101

A. Raj, J. P. Misra, D. Khanduja, V. Upadhyay

{"title":"A study of wire tool surface topography and optimization of wire electro-spark machined UNS N06690 using the federated mode of RSM-ANN","authors":"A. Raj, J. P. Misra, D. Khanduja, V. Upadhyay","doi":"10.1108/ijsi-09-2021-0101","DOIUrl":"https://doi.org/10.1108/ijsi-09-2021-0101","url":null,"abstract":"PurposeThe purpose of this study is to examine the postprocessed wire tool surface using scanning electron microscopy and find out the streamlined conditions of input process variables using multi-objective optimization techniques to get minimum wire wear values.Design/methodology/approachA federated mode of response surface methodology (RSM) and artificial neural network (ANN) is used to optimize the process variables during the machining of a nickel-based superalloy.FindingsThe study explores that with the rise in spark-off time and spark gap voltage, the rate of wire tool consumption also escalates.Originality/valueMost of the researchers used the RSM technique for the optimization of process variables. The RSM generates a second-order regression model during the modeling and optimization of a manufacturing process whose major limitation is to fit the collected data to a second-order polynomial. The leading edge of ANN on the RSM is that it has comprehensive approximation capability, i.e. it can approximate virtually all types of nonlinear functions, including quadratic functions also.","PeriodicalId":45359,"journal":{"name":"International Journal of Structural Integrity","volume":" ","pages":""},"PeriodicalIF":2.7,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42492383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4