Advances in Materials Research-An International Journal最新文献_第7页

Application of Taguchi method in optimization of process parameters of ODS tungsten heavy alloys 田口法在ODS重钨合金工艺参数优化中的应用

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2017-03-25 DOI: 10.12989/AMR.2017.6.1.079

M. A. Sayed, O. Dawood, A. Elsayed, Walid R. Daoush

{"title":"Application of Taguchi method in optimization of process parameters of ODS tungsten heavy alloys","authors":"M. A. Sayed, O. Dawood, A. Elsayed, Walid R. Daoush","doi":"10.12989/AMR.2017.6.1.079","DOIUrl":"https://doi.org/10.12989/AMR.2017.6.1.079","url":null,"abstract":"In the present work, a design of experiment (DOE) technique using Taguchi method, has been applied to optimize the properties of ODS tungsten heavy alloys(WHAs). In this work Taguchi method involves nine experiments groups for four processing parameters (compaction pressure, sintering temperature, binding material type, and oxide type) with three levels was implemented. The signal-to-noise (S/N) ratio and analysis of variance (ANOVA) were employed to obtain the optimal process parameter levels and to analyze the effect of these parameters on density, electrical conductivity, hardness and compressive strength values. The results showed that all the chosen factors have significant effects on all properties of ODS tungsten heavy alloys samples. The density, electrical conductivity and hardness increases with the increase in sintering temperature. The analysis of the verification experiments for the physical properties (density and Electrical conductivity) has shown that Taguchi parameter design can successfully verify the optimal parameters, where the difference between the predicted and the verified values of relative density and electrical conductivity is about 1.01% and 1.15% respectively.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2017-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46054395","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: 9

Transient thermo-mechanical response of a functionally graded beam under the effect of a moving heat source 移动热源作用下功能梯度梁的瞬态热机械响应

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2017-03-25 DOI: 10.12989/amr.2017.6.1.027

N. Al-Huniti, S. Alahmad

{"title":"Transient thermo-mechanical response of a functionally graded beam under the effect of a moving heat source","authors":"N. Al-Huniti, S. Alahmad","doi":"10.12989/amr.2017.6.1.027","DOIUrl":"https://doi.org/10.12989/amr.2017.6.1.027","url":null,"abstract":"The transient thermo-mechanical behavior of a simply-supported beam made of a functionally graded material (FGM) under the effect of a moving heat source is investigated. The FGM consists of a ceramic part (on the top), which is the hot side of the beam as the heat source motion takes place along this side, and a metal part (in the bottom), which is considered the cold side. Grading is in the transverse direction, with the properties being temperature-dependent. The main steps of the thermo-elastic modeling included deriving the partial differential equations for the temperatures and deflections in time and space, transforming them into ordinary differential equations using Laplace transformation, and finally using the inverse Laplace transformation to find the solutions. The effects of different parameters on the thermomechanical behavior of the beam are investigated, such as the convection coefficient and the heat source intensity and speed. The results show that temperatures, and hence the deflections and stresses increase with less heat convection from the beam surface, higher heat source intensity and low speeds.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2017-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49474653","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

Bending and stability analysis of size-dependent compositionally graded Timoshenko nanobeams with porosities 具有孔隙度的尺寸相关成分梯度Timoshenko纳米梁的弯曲和稳定性分析

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2017-03-01 DOI: 10.12989/AMR.2017.6.1.045

Ismail Bensaid, A. Guenanou

引用次数: 8

Buckling behavior of smart MEE-FG porous plate with various boundary conditions based on refined theory 基于精细化理论的智能MEE-FG多孔板在不同边界条件下的屈曲行为

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2016-12-25 DOI: 10.12989/AMR.2016.5.4.279

F. Ebrahimi, A. Jafari

{"title":"Buckling behavior of smart MEE-FG porous plate with various boundary conditions based on refined theory","authors":"F. Ebrahimi, A. Jafari","doi":"10.12989/AMR.2016.5.4.279","DOIUrl":"https://doi.org/10.12989/AMR.2016.5.4.279","url":null,"abstract":"Present disquisition proposes an analytical solution method for exploring the buckling characteristics of porous magneto-electro-elastic functionally graded (MEE-FG) plates with various boundary conditions for the first time. Magneto electro mechanical properties of FGM plate are supposed to change through the thickness direction of plate. The rule of power-law is modified to consider influence of porosity according to two types of distribution namely even and uneven. Pores possibly occur inside FGMs due the result of technical problems that lead to creation of micro-voids in these materials. The variation of pores along the thickness direction influences the mechanical and physical properties. Four-variable tangential-exponential refined theory is employed to derive the governing equations and boundary conditions of porous FGM plate under magneto-electrical field via Hamilton’s principle. An analytical solution procedure is exploited to achieve the non-dimensional buckling load of porous FG plate exposed to magneto-electrical field with various boundary condition. A parametric study is led to assess the efficacy of material graduation exponent, coefficient of porosity, porosity distribution, magnetic potential, electric voltage, boundary conditions, aspect ratio and side-tothickness ratio on the non-dimensional buckling load of the plate made of magneto electro elastic FG materials with porosities. It is concluded that these parameters play remarkable roles on the dynamic behavior of porous MEE-FG plates. The results for simpler states are confirmed with known data in the literature. Presented numerical results can serve as benchmarks for future analyses of MEE-FG plates with porosity phases.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2016-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66389234","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

Elastic-plastic fracture of functionally graded circular shafts in torsion 功能梯度圆轴在扭转下的弹塑性断裂

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2016-12-25 DOI: 10.12989/AMR.2016.5.4.299

V. Ri̇zov

引用次数: 8

Effects of thickness stretching in FGM plates using a quasi-3D higher order shear deformation theory 利用准三维高阶剪切变形理论研究FGM板厚度拉伸的影响

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2016-12-01 DOI: 10.12989/AMR.2016.5.4.223

B. Adim, T. H. Daouadji

{"title":"Effects of thickness stretching in FGM plates using a quasi-3D higher order shear deformation theory","authors":"B. Adim, T. H. Daouadji","doi":"10.12989/AMR.2016.5.4.223","DOIUrl":"https://doi.org/10.12989/AMR.2016.5.4.223","url":null,"abstract":"In this paper, a higher order shear and normal deformation theory is presented for functionally graded material (FGM) plates. By dividing the transverse displacement into bending, shear and thickness stretching parts, the number of unknowns and governing equations for the present theory is reduced, significantly facilitating engineering analysis. Indeed, the number of unknown functions involved in the present theory is only five, as opposed to six or even greater numbers in the case of other shear and normal deformation theories. The present theory accounts for both shear deformation and thickness stretching effects by a hyperbolic variation of ail displacements across the thickness and satisfies the stress-free boundary conditions on the upper and lower surfaces of the plate without requiring any shear correction factor. Equations of motion are derived from Hamiltonas principle. Analytical solutions for the bending and free vibration analysis are obtained for simply supported plates. The obtained results are compared with three-dimensional and quasi- three-dimensional solutions and those predicted by other plate theories. It can be concluded that the present theory is not \u0000only accurate but also simple in predicting the bending and free vibration responses of functionally graded plates.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66388459","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: 19

Thermal buckling behaviour of shear deformable functionally graded single/doubly curved shell panel with TD and TID properties 具有TD和TID特性的剪切变形功能梯度单/双弯曲壳板的热屈曲行为

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2016-12-01 DOI: 10.12989/AMR.2016.5.4.205

V. R. Kar, S. Panda, T. R. Mahapatra

引用次数: 38

Mechanical properties of Al/Al 2 O 3 and Al/B 4 C composites Al/ al2o3和Al/ b4c复合材料的力学性能

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2016-12-01 DOI: 10.12989/AMR.2016.5.4.263

V. K. Pandey, B. P. Patel, S. Guruprasad

引用次数: 10

Thermal buckling of FGM nanoplates subjected to linear and nonlinear varying loads on Pasternak foundation 帕斯捷尔纳克地基上FGM纳米板在线性和非线性变载荷作用下的热屈曲

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2016-12-01 DOI: 10.12989/AMR.2016.5.4.245

F. Ebrahimi, J. Ehyaei, R. Babaei

引用次数: 23

Fatigue wear of polyamides with surface defects under different loading conditions 表面缺陷聚酰胺在不同载荷条件下的疲劳磨损

IF 2.2

Advances in Materials Research-An International Journal Pub Date : 2016-09-25 DOI: 10.12989/AMR.2016.5.3.193

A. Abdelbary, M. Nasr

{"title":"Fatigue wear of polyamides with surface defects under different loading conditions","authors":"A. Abdelbary, M. Nasr","doi":"10.12989/AMR.2016.5.3.193","DOIUrl":"https://doi.org/10.12989/AMR.2016.5.3.193","url":null,"abstract":". Compared to metal-to-metal tribology, polymer tribology presents further complexity as it is more prone to be influenced by operating conditions. Over the past two decades, progress in the field of wear of polymers has led to the establishment of more refined wear mechanisms. The current paper establishes the link between different load parameters and the wear rate of polymers, based on experimental investigations. A pin-on-plate reciprocating tribometer was used to examine the wear behaviour of polyamide sliding against a steel counterface, under constant and fluctuating loads, in dry conditions. In addition, the influence of controlled imperfections in the polymer surface upon its wear rate were examined, under cyclic and steady loading, in order to better understand surface fatigue wear of polymers. The imposed imperfections consisted of vertical artificial deep crack (slit) perpendicular or parallel to the direction of sliding. The study concludes with the followings findings; in general, wear of polymers shows a significant tendency to the type of applied load. Under cyclic loads, polymers show an increase in wear rate compared to those tested under static loads. Such increase was found to increase with the increase in cyclic load frequency. It is also demonstrated that surface cracks results in higher wear rates, particularly under cyclic loads.","PeriodicalId":46242,"journal":{"name":"Advances in Materials Research-An International Journal","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2016-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66388739","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