Curved and Layered Structures最新文献_第7页

Nano reinforcement technique as a tool for enhancement the mechanical and fatigue properties 纳米增强技术作为一种提高机械和疲劳性能的工具

IF 1.5

Curved and Layered Structures Pub Date : 2022-01-01 DOI: 10.1515/cls-2022-0026

Abdulwahab M. Al-Mushehdany, M. Yahya, Esraa Kadhim Ibrahim, H. J. Alalkawi

引用次数: 3

Bow structure damage analysis for hybrid coir-glass fiber composite fishing boat hull subjected to front collision load 前碰撞载荷作用下混杂型椰壳-玻璃纤维复合材料渔船船体船头结构损伤分析

IF 1.5

Curved and Layered Structures Pub Date : 2022-01-01 DOI: 10.1515/cls-2022-0020

A. Windyandari, O. Kurdi, Sulardjaka, M. Tauviqirrahman

{"title":"Bow structure damage analysis for hybrid coir-glass fiber composite fishing boat hull subjected to front collision load","authors":"A. Windyandari, O. Kurdi, Sulardjaka, M. Tauviqirrahman","doi":"10.1515/cls-2022-0020","DOIUrl":"https://doi.org/10.1515/cls-2022-0020","url":null,"abstract":"Abstract Hybridization of natural and synthetic fibers has the ability to improve composite performance. It means that the combination of natural fibers such as coir, jute, bamboo, and sisal with synthetic or glass fiber can broaden the role of the composite material, especially for structural application. This study developed a finite element simulation to investigate the damage to the bow structure of the fishing boat hull, which was produced using hybrid coir-glass fiber composite (HCGFRP) material subjected to front collision load. The experimental measurement was conducted to determine the mechanical properties of four hybrid composite laminates defined based on the differences in their layers number, fiber types, and orientation angle. Moreover, a numerical simulation model was applied to the traditional fishing boat colliding with fishery harbor quay, and the scenario was defined by varying the boat speed and the types of laminates adopted on the hull structure. The results showed the damage level for the bow structure of the HCGFRP boat due to the collision accidents, while the numerical findings are expected to be used as the basic knowledge in applying the hybrid coir-glass fiber laminates composite as an alternative hull construction material.","PeriodicalId":44435,"journal":{"name":"Curved and Layered Structures","volume":"9 1","pages":"236 - 257"},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46898617","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

Thermal fatigue analysis of different nano coating thickness by air plasma spraying in diesel engine thermal barrier coating 空气等离子喷涂柴油机热障涂层不同厚度纳米涂层的热疲劳分析

IF 1.5

Curved and Layered Structures Pub Date : 2022-01-01 DOI: 10.1515/cls-2022-0028

Q. Mahdi, Ibtihal A. Mhmood, Mahmoud A Mashhour

{"title":"Thermal fatigue analysis of different nano coating thickness by air plasma spraying in diesel engine thermal barrier coating","authors":"Q. Mahdi, Ibtihal A. Mhmood, Mahmoud A Mashhour","doi":"10.1515/cls-2022-0028","DOIUrl":"https://doi.org/10.1515/cls-2022-0028","url":null,"abstract":"Abstract The use of Atmospheric Plasma Spraying (APS) and yttria stabilized zirconia (YSZ) nanostructured coatings has been applied to the bond layer of NiCrAlY coated engine cylinder heads, pistons, and valve substrates. Thermal barrier coatings (TBCs) have been utilized to increase the engine performance in the design of combustion chamber components for internal combustion engines. ASTM-C-633-01 standard has been employed to conduct the bonding strength testing. It was also considered and directed to estimate the coating’s thermal performance by evaluating its insulation value and conducting a thermal insulation durability assessment. Field emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) were used to look at the nano powders and coatings’ microstructures and phase compositions. In YSZ, it was discovered that the topcoat of samples had a tri-modal pattern of nano sized particles engaged by the powder, micro-columnar grains generated from the re-solidification of the molten part of the powder, and almost equiaxed grains, which were a unique construction feature. The results demonstrated the creation of nano zones in one of three nanostructured coating zones and improved the top coating properties, including bonding strength and thermal insulation capacity. The high temperature of the diesel engine caused fatigue failure in the intake and exhaust valves.","PeriodicalId":44435,"journal":{"name":"Curved and Layered Structures","volume":"9 1","pages":"365 - 381"},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47312819","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

Size-dependent nonlinear vibration analysis of nanobeam embedded in multi-layer elastic media and subjected to electromechanical and thermomagnetic loadings 嵌入多层弹性介质中的纳米梁在机电和热磁载荷作用下的尺寸相关非线性振动分析

IF 1.5

Curved and Layered Structures Pub Date : 2022-01-01 DOI: 10.1515/cls-2022-0031

G. Sobamowo

{"title":"Size-dependent nonlinear vibration analysis of nanobeam embedded in multi-layer elastic media and subjected to electromechanical and thermomagnetic loadings","authors":"G. Sobamowo","doi":"10.1515/cls-2022-0031","DOIUrl":"https://doi.org/10.1515/cls-2022-0031","url":null,"abstract":"Abstract In this work, magneto-electro-mechanical size-dependent nonlinear vibration analysis of nanobeam embedded in multi-layer of Winkler, Pasternak, quadratic and cubic nonlinear elastic media is presented. A nonlinear partial differential equation of motion is derived using Von Karman geometric nonlinearity, nonlocal elasticity theory, Euler-Bernoulli beam theory and Hamilton’s principle. Additionally, the efficiency of multiple scales Lindstedt-Poincare method for the strong nonlinear and large amplitude systems is presented. It is established that the results of multiple scales Lindstedt-Poincare method are in good agreements with the numerical and exact solutions for the strong nonlinear problems. However, the classical multiple scales method fails and gives results with very large discrepancies form the results of the numerical and exact solutions when the perturbation parameter is large, and the nonlinearity terms are strong. The high accuracy of the results of multiple scales Lindstedt-Poincare method and its excellent ability to produce accurate results for all values (small and large) of perturbation parameter and the nonlinearity terms show the superiority of the multiple scales Lindstedt-Poincare method over the classical multiple scales method. Further results present the effects of the model parameters on the dynamic behaviour of the nanobeam. It is hoped that the present study will advance nonlinear analysis of the engineering structures.","PeriodicalId":44435,"journal":{"name":"Curved and Layered Structures","volume":"9 1","pages":"403 - 424"},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42857987","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: 0

Experimental and analytical study on the behavior of hybrid GFRP/steel bars in reinforced concrete deep beams 钢筋混凝土深梁中GFRP/钢筋混合性能的试验与分析研究

IF 1.5

Curved and Layered Structures Pub Date : 2022-01-01 DOI: 10.1515/cls-2022-0012

A. Shoeib, Ahmed Arafa, Ramy Abd El-Hakeem Abd El Rady, W. Tawhed

{"title":"Experimental and analytical study on the behavior of hybrid GFRP/steel bars in reinforced concrete deep beams","authors":"A. Shoeib, Ahmed Arafa, Ramy Abd El-Hakeem Abd El Rady, W. Tawhed","doi":"10.1515/cls-2022-0012","DOIUrl":"https://doi.org/10.1515/cls-2022-0012","url":null,"abstract":"Abstract The deep beam is one of the essential members of high-rise buildings structures, so the deep beams are used as a transfer girder; in walls water structures, the deep beam behavior is different from the slender beam behavior; the deep beam plane section before does not remain plane after bending. In recent years, the use of FRP as a composite material in reinforced concrete structures has been growing up to cover problems by weight of structure buildings, corrosion, repairing, and construction cost. This paper presents an experimental, analytical study to assign the variation of mechanical properties of reinforced concrete deep beams using vertical and horizontal GFRP stirrups. This paper investigates the mechanical properties of test specimens for deep beams reinforced in shear with GFRP or steel bars as web reinforcement. The deep beams are reinforced with glass fiber reinforced polymer (GFRP) in various ratios as a web reinforcement configuration (0, 0.25%, and 0.40%) rather than traditional steel web reinforcement. All tested specimens have the same span to depth ratio of 0.40 (a/d); the primary and secondary reinforcement is steel bars. The web reinforcement ratio significantly affected deep beams’ load capacity and mechanical behavior. The GFRP enhancement the mechanical behavior of the reinforced concrete deep. Increasing the GFRP web reinforcement ratio enhances the deep beam load capacity. The test results compared with the traditional ACI design method strut-tie model to demonstrate the effect of web reinforcement ratio on deep beam load capacity and strut width. The test results have been verified by ABAQUS 6.13.","PeriodicalId":44435,"journal":{"name":"Curved and Layered Structures","volume":"9 1","pages":"124 - 145"},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45266911","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

Effect of concrete and reinforcement continuity on repairing mid-span zone in simply supported one-way slab 混凝土与钢筋连续性对单向简支板跨中区修复的影响

IF 1.5

Curved and Layered Structures Pub Date : 2021-12-04 DOI: 10.1515/cls-2022-0006

M. J. Kadhim, K. Shadhan, Bilal Ismaeel Abd Al-Zahra

引用次数: 0

Numerical evaluation of expansion loops for pipe subjected to thermal displacements 热位移作用下管道膨胀回路的数值计算

IF 1.5

Curved and Layered Structures Pub Date : 2021-12-04 DOI: 10.1515/cls-2022-0007

H. Yudo, S. Jokosisworo, Wilma Amiruddin, Pujianto Pujianto, T. Tuswan, M. Djaeni

{"title":"Numerical evaluation of expansion loops for pipe subjected to thermal displacements","authors":"H. Yudo, S. Jokosisworo, Wilma Amiruddin, Pujianto Pujianto, T. Tuswan, M. Djaeni","doi":"10.1515/cls-2022-0007","DOIUrl":"https://doi.org/10.1515/cls-2022-0007","url":null,"abstract":"Abstract The thermal expansion can lead to the high stress on the pipe. The problem can be overcome using expansion loops in a certain length depending on the material’s elastic modulus, diameter, the amount of expansion, and the pipe’s allowable stresses. Currently, there is no exact definition for the dimension of expansion loops design both for loop width (W) and loop footing height (H) sizes. In this study, expansion loops were investigated with using ratio of width and height (W/H) variations to understand pipe stress occurring on the expansion loops and the expansion loops’ safety factor. Relationship between non dimensional stress on the expansion loop pipe was studied numerically by finite element software on several working temperatures of 400oF, 500oF, 600oF, and 700oF. It can be found that stress occurring on the pipes increases as the increases of W/H of the expansion loops and results in a lower safety factor. The safety factor of the expansion loops pipe has a value of 1 when the ratio of loop width and loop footing height (W/H) value was 1.2 for a 16-inch diameter pipe. Stress occurring on the pipe increases with the increase of the working temperature. Expansion loops pipe designed for 400oF can still work well to handle thermal extension pipe occurring on 500oF.","PeriodicalId":44435,"journal":{"name":"Curved and Layered Structures","volume":"9 1","pages":"72 - 80"},"PeriodicalIF":1.5,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44458966","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: 0

Application of generalized equations of finite difference method to computation of bent isotropic stretched and/or compressed plates of variable stiffness under elastic foundation 广义有限差分法在弹性基础下各向同性变刚度拉伸板计算中的应用

IF 1.5

Curved and Layered Structures Pub Date : 2021-11-06 DOI: 10.1515/cls-2022-0005

Seydou Youssoufa, Moussa Sali, A. Njifenjou, Nkongho Anyi Joseph, Ngayihi Abbe Claude Valery

引用次数: 0

Application of physical theory of cavity in the construction of double skin facades 空腔物理理论在双层外墙施工中的应用

IF 1.5

Curved and Layered Structures Pub Date : 2021-11-03 DOI: 10.1515/cls-2022-0004

B. Bielek, D. Szabó, J. Klem, Kristína Kaniková

引用次数: 0

On the deformation of laminated composite and sandwich curved beams 层合复合材料与夹层弯曲梁的变形研究

IF 1.5

Curved and Layered Structures Pub Date : 2021-10-18 DOI: 10.1515/cls-2022-0001

P. V. Avhad, A. S. Sayyad

{"title":"On the deformation of laminated composite and sandwich curved beams","authors":"P. V. Avhad, A. S. Sayyad","doi":"10.1515/cls-2022-0001","DOIUrl":"https://doi.org/10.1515/cls-2022-0001","url":null,"abstract":"Abstract Plenty of research articles are available on the static deformation analysis of laminated straight beams using refined shear deformation theories. However, research on the deformation of laminated curved beams with simply supported boundary conditions is limited and needs more attention nowadays. With this objective, the present study deals with the static analysis of laminated composite and sandwich beams curved in elevation using a new quasi-3D polynomial type beam theory. The theory considers the effects of both transverse shear and normal strains, i.e. thickness stretching effects. In the present theory, axial displacement has expanded up to the fifth-order polynomial in terms of thickness coordinates to effectively account for the effects of curvature and deformations. The present theory satisfies the zero traction boundary condition on the top and bottom surfaces of the beam. Governing differential equations and associated boundary conditions are established by using the Principal of virtual work. Navier’s solution technique is used to obtain displacements and stresses for simply supported beams curved in elevation and subjected to uniformly distributed load. The present results can be benefited to the upcoming researchers.","PeriodicalId":44435,"journal":{"name":"Curved and Layered Structures","volume":"9 1","pages":"1 - 12"},"PeriodicalIF":1.5,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46077360","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