Advances in Materials Research-An International Journal最新文献_第5页

Analyzing nonlinear mechanical-thermal buckling of imperfect micro-scale beam made of graded graphene reinforced composites 梯度石墨烯增强复合材料微尺度不完美梁的非线性机热屈曲分析

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2019-09-01 DOI: 10.12989/AMR.2019.8.3.219

B. Khalaf, R. M. Fenjan, Nadhim M. Faleh

引用次数: 3

Temperature distribution of ceramic panels of a V94.2 gas turbine combustor under realistic operation conditions V94.2燃气轮机燃烧室陶瓷板在实际工况下的温度分布

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2019-06-25 DOI: 10.12989/AMR.2019.8.2.117

Mohammad Javad Namayandeh, M. Mohammadimehr, M. Mehrabi

{"title":"Temperature distribution of ceramic panels of a V94.2 gas turbine combustor under realistic operation conditions","authors":"Mohammad Javad Namayandeh, M. Mohammadimehr, M. Mehrabi","doi":"10.12989/AMR.2019.8.2.117","DOIUrl":"https://doi.org/10.12989/AMR.2019.8.2.117","url":null,"abstract":"The lifetime of a gas turbine combustor is typically limited by the durability of its liner, the structure that encloses the high-temperature combustion products. The primary objective of the combustor thermal design process is to ensure that the liner temperatures do not exceed a maximum value set by material limits. Liner temperatures exceeding these limits hasten the onset of cracking which increase the frequency of unscheduled engine removals and cause the maintenance and repair costs of the engine to increase. Hot gas temperature prediction can be considered a preliminary step for combustor liner temperature prediction which can make a suitable view of combustion chamber conditions. In this study, the temperature distribution of ceramic panels for a V94.2 gas turbine combustor subjected to realistic operation conditions is presented using three-dimensional finite difference method. A simplified model of alumina ceramic is used to obtain the temperature distribution. The external thermal loads consist of convection and radiation heat transfers are considered that these loads are applied to flat segmented panel on hot side and forced convection cooling on the other side. First the temperatures of hot and cold sides of ceramic are calculated. Then, the thermal boundary conditions of all other ceramic sides are estimated by the field observations. Finally, the temperature distributions of ceramic panels for a V94.2 gas turbine combustor are computed by MATLAB software. The results show that the gas emissivity for diffusion mode is more than premix therefore the radiation heat flux and temperature will be more. The results of this work are validated by ANSYS and ABAQUS softwares. It is showed that there is a good agreement between all results.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":"8 1","pages":"117-135"},"PeriodicalIF":2.2,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48576907","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 waste cement bag fibers on the mechanical strength of concrete 废水泥袋纤维对混凝土机械强度的影响

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2019-06-01 DOI: 10.12989/AMR.2019.8.2.103

C. Marthong

{"title":"Effect of waste cement bag fibers on the mechanical strength of concrete","authors":"C. Marthong","doi":"10.12989/AMR.2019.8.2.103","DOIUrl":"https://doi.org/10.12989/AMR.2019.8.2.103","url":null,"abstract":"Polypropylene (PP) fibers for making fabric which is used for packing cement have a high strength and high tear resistance. Due to these excellent properties the present study investigates the effect of PP fibers on the mechanical strength of concrete. Mechanical strength parameters such as compressive strength, splitting tensile strength and flexural strength are evaluated. Structural integrity of concrete using Ultrasonic Pulse Velocity (UPV) was also studied. Concrete containing PP fibers in percentage of 0%, 0.15%, 0.25%, 0.5% and 0.75% was developed with a characteristic compressive strength of 25 MPa. Concrete cubes, cylinder and prismatic specimens were cast and tested. It was found that the UPV values recorded for all specimens were of the similar order. Test results indicated the used of PP fibers can significantly improve the flexural and splitting tensile strengths of concrete materials whereas it resulted a decreased in compressive strength. The relative increase in split tensile and flexural strength was optimum at a fiber dosage of 0.5% and a mild decreased were observed in 28 days compressive strength. The findings in this paper suggested that PP fibers deriving from these waste cement bags are a feasible fiber option for fiber-reinforced concrete productions.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":"8 1","pages":"103-115"},"PeriodicalIF":2.2,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44027906","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 developments and challenges in welding of magnesium to titanium alloys 镁合金与钛合金焊接的最新进展与挑战

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2019-01-01 DOI: 10.12989/amr.2019.8.1.047

S. T. Auwal, Singh Ramesh, C. Tan, Zequn Zhang, Xiaoye Zhao, S. Manladan

{"title":"Recent developments and challenges in welding of magnesium to titanium alloys","authors":"S. T. Auwal, Singh Ramesh, C. Tan, Zequn Zhang, Xiaoye Zhao, S. Manladan","doi":"10.12989/amr.2019.8.1.047","DOIUrl":"https://doi.org/10.12989/amr.2019.8.1.047","url":null,"abstract":"Joining of Mg/Ti hybrid structures by welding for automotive and aerospace applications has attracted great attention in recent years due mainly to its potential benefit of energy saving and emission reduction. However, joining them has been hampered with many difficulties due to their physical and metallurgical incompatibilities. Different joining processes have been employed to join Mg/Ti, and in most cases in order to get a metallurgical bonding between them was the use of an intermediate element at the interface or mutual diffusion of alloying elements from the base materials. The formation of a reaction product (in the form of solid solution or intermetallic compound) along the interface between the Mg and Ti is responsible for formation of a metallurgical bond. However, the interfacial bonding achieved and the joints performance depend significantly on the newly formed reaction product(s). Thus, a thorough understanding of the interaction between the selected intermediate elements with the base metals along with the influence of the associated welding parameters are essential. This review is timely as it presents on the current paradigm and progress in welding and joining of Mg/Ti alloys. The factors governing the welding of several important techniques are deliberated along with their joining mechanisms. Some opportunities to improve the welding of Mg/Ti for different welding techniques are also identified.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":"8 1","pages":"47-73"},"PeriodicalIF":2.2,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66389010","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

Interfacial stresses in damaged RC beams strengthened by externally bonded prestressed GFRP laminate plate: Analytical and numerical study 外粘结预应力玻璃钢加固损伤RC梁的界面应力:解析与数值研究

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2019-01-01 DOI: 10.12989/AMR.2019.8.3.197

S. Chergui, T. H. Daouadji, M. Hamrat, B. Boulekbache, A. Bougara, B. Abbès, S. Amziane

{"title":"Interfacial stresses in damaged RC beams strengthened by externally bonded prestressed GFRP laminate plate: Analytical and numerical study","authors":"S. Chergui, T. H. Daouadji, M. Hamrat, B. Boulekbache, A. Bougara, B. Abbès, S. Amziane","doi":"10.12989/AMR.2019.8.3.197","DOIUrl":"https://doi.org/10.12989/AMR.2019.8.3.197","url":null,"abstract":") Abstract. In this study, the interfacial stresses in RC beams strengthened by externally bonded prestressed GFRP laminate are evaluated using an analytical approach, based on the equilibrium equations and boundary conditions. A comparison of the interfacial stresses obtained from the present analytical model and other existing models is undertaken. Otherwise, a parametric study is conducted to investigate the effects of geometrical and material properties on the variation of interfacial stresses in damaged RC beams strengthened by externally bonded prestressed GFRP laminate. The results obtained indicate that the damage degree has little effect on the maximum shear stress, with a variation less than 5% between the damaged and undamaged RC beams. However, the results also reveal that the prestressing level has a significant effect on the interfacial stresses; hence the damaged RC beam strengthened with an initial prestressing force of 100 kN gives 110% higher maximum shear stress than the damaged RC beam strengthened with an initial prestressing force of 50 kN. The values of shear stress obtained by the analytical approach are approximately equal to 44% of those obtained from the numerical solution, while the interfacial normal stresses predicted by the numerical study are approximately 26% higher than those calculated by the analytical","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":"8 1","pages":"197-217"},"PeriodicalIF":2.2,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66389159","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: 12

Analytical analysis for the forced vibration of CNT surrounding elastic medium including thermal effect using nonlocal Euler-Bernoulli theory 含热效应的碳纳米管弹性介质强迫振动的非局部Euler-Bernoulli理论分析

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2018-09-01 DOI: 10.12989/AMR.2018.7.3.163

T. Bensattalah, M. Zidour, T. H. Daouadji

引用次数: 20

Elastic analysis of interfacial stresses in prestressedPFGM-RC hybrid beams 预应力pfgm - rc混合梁界面应力的弹性分析

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2018-06-01 DOI: 10.12989/AMR.2018.7.2.083

Rabahi Abderezak, Benferhat Rabia, T. H. Daouadji, B. Abbès, Adim Belkacem, F. Abbès

引用次数: 15

Dynamic analysis for anti-symmetric cross-ply and angle-ply laminates for simply supported thick hybrid rectangular plates 简支厚混合矩形板反对称正交和斜交层板的动力分析

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2018-06-01 DOI: 10.12989/AMR.2018.7.2.119

Mohamed Amine Benhenni, T. H. Daouadji, B. Abbès, B. Adim, Yuming Li, F. Abbès

{"title":"Dynamic analysis for anti-symmetric cross-ply and angle-ply laminates for simply supported thick hybrid rectangular plates","authors":"Mohamed Amine Benhenni, T. H. Daouadji, B. Abbès, B. Adim, Yuming Li, F. Abbès","doi":"10.12989/AMR.2018.7.2.119","DOIUrl":"https://doi.org/10.12989/AMR.2018.7.2.119","url":null,"abstract":"In this paper, static and vibration analysis for anti-symmetric cross-ply and angle- ply carbon/glass hybrid laminates rectangular composite plate are presented. In this analysis, the equations of motion for simply supported thick laminated hybrid rectangular plates are derived and obtained through the use of Hamilton's principle. The closed-form solutions of anti-symmetric cross-ply and angle- ply laminates are obtained using Navier solution. The effects of side-to-thickness ratio, aspect ratio, and lamination schemes on the fundamental frequencies loads are investigated. The study concludes that shear deformation laminate theories accurately predict the behavior of composite laminates, whereas the classical laminate theory over predicts natural frequencies. The excellent accuracy of the present analytical solution is confirmed by making some comparisons of the present results with those available in the literature. It can be concluded that the proposed theory is accurate and simple in solving the free vibration behaviors of anti-symmetric cross-ply and angle- ply hybrid laminated composite plates.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":"7 1","pages":"119"},"PeriodicalIF":2.2,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47910672","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: 21

Thermal stability analysis of temperature dependent inhomogeneous size-dependent nano-scale beams 温度相关非均匀尺寸相关纳米梁的热稳定性分析

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2018-03-01 DOI: 10.12989/amr.2018.7.1.001

Ismail Bensaid, Ahmed Bekhadda

引用次数: 8

Analytical analysis of the interfacial shear stress in RC beams strengthened with prestressed exponentially-varying properties plate 预应力指数变性能板加固RC梁界面剪应力的分析

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2018-03-01 DOI: 10.12989/AMR.2018.7.1.391

Benferhat Rabia, Rabahi Abderezak, T. H. Daouadji, B. Abbès, Adim Belkacem, F. Abbès

引用次数: 13