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Online since: March 2011
Authors: Katsuyuki Kida, Takashi Honda, Edson Costa Santos, Junnosuke Koga
Tables 1 presents their chemical composition and mechanical properties used in the experiments, respectively.
The mechanical properties of the material which are shown in Table 1 were used in the calculations, and the materials were assumed to have a linear response.
Table 1 Mechanical properties of the Si3N4 specimen.
We ignored the effect of the residual stresses on the stress intensity factors.
Stress intensity factors at the inside tips of the cracks are plotted in Fig. 5 (b).
The mechanical properties of the material which are shown in Table 1 were used in the calculations, and the materials were assumed to have a linear response.
Table 1 Mechanical properties of the Si3N4 specimen.
We ignored the effect of the residual stresses on the stress intensity factors.
Stress intensity factors at the inside tips of the cracks are plotted in Fig. 5 (b).
Online since: June 2005
Authors: Baig Gyu Choi, Je Hyun Lee, J.S. Lee, S.G. Gang, Ung Yu Paik, Chang Yong Jo
Co-base superalloys have been applied in the stationary compoents of gas turbine owing to
their excellent high temperaure properties.
The existing carbides of Ni-base superalloy begin to decompose above 700 o C, and the mechanical properties decrease above 900 o C because of the dissolution or coarsening of γ' phase.
However, the microstructure and mechanical properties are stable above 900 o C in Co-base superalloys.
McLean had reported that the secondary DAS was also affected by solute diffusion, and the cooling rate (GV) was an important factor.
Brooks, Heat Treatment, Structure and Properties of Nonferrous Alloys, US (1982)
The existing carbides of Ni-base superalloy begin to decompose above 700 o C, and the mechanical properties decrease above 900 o C because of the dissolution or coarsening of γ' phase.
However, the microstructure and mechanical properties are stable above 900 o C in Co-base superalloys.
McLean had reported that the secondary DAS was also affected by solute diffusion, and the cooling rate (GV) was an important factor.
Brooks, Heat Treatment, Structure and Properties of Nonferrous Alloys, US (1982)
Online since: September 2016
Authors: Steinar Lundberg
An important additional requirement is that the partial safety factors recommended in EN 1999 shall in ultimate limit state (ULS) be multiplied by 1,1 and in accidental limit state (ALS) with 0,9.
The mechanical properties in haz for thicknesses above 15 mm have an additional reduction according to the standard.
Reduction factors for haz for welding of EN AW 5083 H321 and EN AW 6082 T6 depending of the material thicknesses.
The same reduction factors and width of haz as given for the actual alloys in EN 1999-1-1 is used for design of FSW joints.
Structural aluminium fabrication, Edition 2, 2015 [5] EN 1090-3 Execution of steel structures and aluminium structures – Part 3: Technical requirements for aluminium structures [6] Marine Aluminium: Load test HD top plank, L = 4300 mm – Test report and results, Report no.: 1630000-MA-7010-N-RA-002-0001 [7] EN 1999-1-3 Eurocode 9: Design of aluminium structures – Part 1-3: Structures susceptible to fatigue [8] Steinar Lundberg, Nils Jakob Tjøstheim: Mechanical properties in Heat Affected Zone of welded EN AW 6082 T6 (Hydro Aluminium Report) [9] Steinar Lundberg, Nils Jakob Tjøstheim: Mechanical properties in Heat Affected Zone of welded EN AW 5083 H321 (Hydro Aluminium Report) [10] Steinar Lundberg, Randi Mørkrid: Mechanical properties in Heat Affected Zone of welded EN AW 6060 T66 and EN AW 6063 T66 (preliminary report)
The mechanical properties in haz for thicknesses above 15 mm have an additional reduction according to the standard.
Reduction factors for haz for welding of EN AW 5083 H321 and EN AW 6082 T6 depending of the material thicknesses.
The same reduction factors and width of haz as given for the actual alloys in EN 1999-1-1 is used for design of FSW joints.
Structural aluminium fabrication, Edition 2, 2015 [5] EN 1090-3 Execution of steel structures and aluminium structures – Part 3: Technical requirements for aluminium structures [6] Marine Aluminium: Load test HD top plank, L = 4300 mm – Test report and results, Report no.: 1630000-MA-7010-N-RA-002-0001 [7] EN 1999-1-3 Eurocode 9: Design of aluminium structures – Part 1-3: Structures susceptible to fatigue [8] Steinar Lundberg, Nils Jakob Tjøstheim: Mechanical properties in Heat Affected Zone of welded EN AW 6082 T6 (Hydro Aluminium Report) [9] Steinar Lundberg, Nils Jakob Tjøstheim: Mechanical properties in Heat Affected Zone of welded EN AW 5083 H321 (Hydro Aluminium Report) [10] Steinar Lundberg, Randi Mørkrid: Mechanical properties in Heat Affected Zone of welded EN AW 6060 T66 and EN AW 6063 T66 (preliminary report)
Online since: October 2023
Authors: Elmi Abu Bakar, Yasmin Wadzer, Hussin Mamat
Their small sizes, high surface-to-volume ratio, high thermal properties, high energy density and catalyst role are one of the unique properties that enhance the system performance [2].
In this approach, power, duration, and dispersion volume are the major factors that influence breaking the agglomerates [7].
This condition resulted in a lower aspect ratio, causing the deterioration of the material’s tensile properties [19].
Graphene Platelets and Their Polymer Composites: Fabrication, Structure, Properties, and Applications.
An overview on the effect of ultrasonication duration on different properties of nanofluids.
In this approach, power, duration, and dispersion volume are the major factors that influence breaking the agglomerates [7].
This condition resulted in a lower aspect ratio, causing the deterioration of the material’s tensile properties [19].
Graphene Platelets and Their Polymer Composites: Fabrication, Structure, Properties, and Applications.
An overview on the effect of ultrasonication duration on different properties of nanofluids.
Online since: April 2014
Authors: Peter Groche, Jörg Avemann, Stefan Calmano, Sebastian Schmitt
Control of product properties as an application of the 3D Servo Press
An approach to increase process flexibility is to adapt processes and process factors to fluctuating properties of semi-finished parts.
Two approaches were developed to control product properties.
This includes measuring properties of the input material (Figure 11, dashed line left) and deriving influence factors on the process based on experience and process comprehension.
The open-loop processor used for this purpose consists of a knowledge-based mathematical model which anticipates the relation between measured input properties and process factors and subsequently determines the influence value for the forming process to compensate the fluctuation in the input property.
Based on this classification a summary of uncertainties affecting production processes is possible.
Two approaches were developed to control product properties.
This includes measuring properties of the input material (Figure 11, dashed line left) and deriving influence factors on the process based on experience and process comprehension.
The open-loop processor used for this purpose consists of a knowledge-based mathematical model which anticipates the relation between measured input properties and process factors and subsequently determines the influence value for the forming process to compensate the fluctuation in the input property.
Based on this classification a summary of uncertainties affecting production processes is possible.
Online since: February 2014
Authors: Hyun Do Yun, Hye Ran Kim, Dae Hyun Kang
Each type composite is affected by factors such as fiber volume fraction and curing conditions.Each type composite is studied age (3, 7 and 28).
Fiber types Tensile strength (MPa) Aspect ratio (l/df) Elastic modulus(MPa) Length (mm) Density (g/cm3) Diameter (mm) Hooked steel fiber 1,100 60 205 30 7.85 0.5 Table 1.Mechanical properties of steel fiber Table 2.
Conclusion In this study, the mechanical properties of SFRC and AASC were evaluated and concluded.
The mechanical properties of AASC with 100% replaced cement aresimilar.
Sanjayan:Workability and mechanical properties of alkali activated slag concrete, Cement and Concrete Research 29, pp. 455-458 (1999)
Fiber types Tensile strength (MPa) Aspect ratio (l/df) Elastic modulus(MPa) Length (mm) Density (g/cm3) Diameter (mm) Hooked steel fiber 1,100 60 205 30 7.85 0.5 Table 1.Mechanical properties of steel fiber Table 2.
Conclusion In this study, the mechanical properties of SFRC and AASC were evaluated and concluded.
The mechanical properties of AASC with 100% replaced cement aresimilar.
Sanjayan:Workability and mechanical properties of alkali activated slag concrete, Cement and Concrete Research 29, pp. 455-458 (1999)
Online since: June 2011
Authors: Jing Ma, Jun Xu, Bo You
This is expected since most physical, electronic, chemical, mechanical, and biological systems are affected by temperature.
The low resonance frequency of tuning-fork allows low power consumption of CMOS electronics and miniaturized by the use of photolithography and etching technology are very attractive properties for sensor applications [3, 4].
Two prongs connected at one end make a resonator whose resonance frequency is defined by the properties of the material from which it is made and by its geometry.
The cutting angle of flexural quartz crystal is expressed by new cut ZY(θ/Φ), it is the principal affecting the quartz tuning fork temperature sensor.
From FEM analysis, it is shown that the tine width and the tine tip electrode thickness are major factors affecting the resonance frequency of tuning fork.
The low resonance frequency of tuning-fork allows low power consumption of CMOS electronics and miniaturized by the use of photolithography and etching technology are very attractive properties for sensor applications [3, 4].
Two prongs connected at one end make a resonator whose resonance frequency is defined by the properties of the material from which it is made and by its geometry.
The cutting angle of flexural quartz crystal is expressed by new cut ZY(θ/Φ), it is the principal affecting the quartz tuning fork temperature sensor.
From FEM analysis, it is shown that the tine width and the tine tip electrode thickness are major factors affecting the resonance frequency of tuning fork.
Online since: March 2012
Authors: Muhamad Zaini Yunos, H. Basri, Ahmad Fauzi Ismail, Zawati Harun
Polysulfone (PSf) membrane relatively has great mechanical properties, resistance to extreme pH conditions as well as thermally stable.
However, to date, the previous work on water as non-solvent additives did not provide definitive information on membrane mechanical properties.
Porosity and tensile properties.
There are many factors that influenced the formation of membrane structure prepared via phase inversion method.
In general, membrane porosity has a direct relationship to the flux permeation, rejection and also mechanical properties of membrane, and can be considered as a key specification factors for the membrane performance.
However, to date, the previous work on water as non-solvent additives did not provide definitive information on membrane mechanical properties.
Porosity and tensile properties.
There are many factors that influenced the formation of membrane structure prepared via phase inversion method.
In general, membrane porosity has a direct relationship to the flux permeation, rejection and also mechanical properties of membrane, and can be considered as a key specification factors for the membrane performance.
Online since: July 2020
Authors: Wei Huang
Gao Yongjing measured the elastic modulus of rubber by digital speckle method, and proved that digital speckle correlation method can be used in rubber mechanical property test [4].
Liu Wenjing studied the damping effect of the rubber element, and analyzed the factors causing the fatigue of the rubber joint through the strain field and the strain energy density field [5].
The polyurethane rubber material studied in this paper, because of its polymer properties, Poisson's ratio close to 0.5, the difficulty of large deformation to be predicted and other factors, using this measurement method is efficient and feasible.
If we can remove these interference factors such as noise data and bright and dark points, the data will be more effective.
Determination of compression stress-strain properties of vulcanized rubber or thermoplastic rubber GB/T 7757-2009 [S].
Liu Wenjing studied the damping effect of the rubber element, and analyzed the factors causing the fatigue of the rubber joint through the strain field and the strain energy density field [5].
The polyurethane rubber material studied in this paper, because of its polymer properties, Poisson's ratio close to 0.5, the difficulty of large deformation to be predicted and other factors, using this measurement method is efficient and feasible.
If we can remove these interference factors such as noise data and bright and dark points, the data will be more effective.
Determination of compression stress-strain properties of vulcanized rubber or thermoplastic rubber GB/T 7757-2009 [S].
Online since: June 2014
Authors: Qin He Zhang, Jian Hua Zhang, Min Zhang, Qing Yu Liu
Influence of Grain Size and Grain Boundary of workpieceon Micro EDM
Qingyu Liu1,2,a, Qinhe Zhang1,2,b*,Jianhua Zhang1,2,c, Min Zhang1,2,d
1School of Mechanical Engineering,Shandong University, Jinan,China
2Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education, Shandong University, Jinan 250061, China
aQingyu1207@126.com, bzhangqh@sdu.edu.cn, cjhzhang@sdu.edu.cn, dzhangminares@foxmail.com
Keywords:MicroEDM; Material microstructure; Grain boundary;Grain size;
Abstract.Micro EDM is used to machine micro features which are of the same size order as material microstructure of workpiece.
Due to the difference of the thermal properties between the crystal grain and grain boundary, the machining performance of micro EDM varies with the crystal grain sizes of workpiece.
A lot of studies demonstrate that the material microstructures, especially the grain size and grain boundary, have noticeable influence on micro EDM.The problem was encountered that material microstructure which is insignificant in macroEDM, but important in microEDM[3].It was found that a variation in grain sizes significantly influences theperformance of EDM, whichlargely related to the microstructure and the properties of the materialin micro EDM[4].
Due to its thermal material removal mechanism, performance of micro EDM has a close relationship with the thermal properties of material, especially the melting point and thermal conductivity.
Kunieda, Study on factors determining limits of minimum machinable size in micro EDM.
Due to the difference of the thermal properties between the crystal grain and grain boundary, the machining performance of micro EDM varies with the crystal grain sizes of workpiece.
A lot of studies demonstrate that the material microstructures, especially the grain size and grain boundary, have noticeable influence on micro EDM.The problem was encountered that material microstructure which is insignificant in macroEDM, but important in microEDM[3].It was found that a variation in grain sizes significantly influences theperformance of EDM, whichlargely related to the microstructure and the properties of the materialin micro EDM[4].
Due to its thermal material removal mechanism, performance of micro EDM has a close relationship with the thermal properties of material, especially the melting point and thermal conductivity.
Kunieda, Study on factors determining limits of minimum machinable size in micro EDM.