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Online since: August 2004
Authors: Do Won Seo, Ho Chel Yoon, Jae Kyoo Lim, Yang Bae Jeon, Hyo Jin Kim
Delale and so on suggested the adhesive bonding theory that the adhesive thickness and properties
are different from adherend, solved the problem on the non-symmetrical stress distribution subjected
to properties of adherend, greatly distributed for theoretical analysis [2].
Therefore, to figure out the theoretically exact solution is complicated due to specialty of stress and complicacy of effective factors in the adhesive bonding.
These factors are overlap length, overlap width, curing pressure and surface treatment.
The optimum condition determined for experimental factors can improve the bonding technique and design a high strength.
Properties of material shown in Table 2 such as Young's modulus, Poisson's ratio and so on is applied for this FEM model from results of testing tensile-experiment of adhesive and adherend.
Therefore, to figure out the theoretically exact solution is complicated due to specialty of stress and complicacy of effective factors in the adhesive bonding.
These factors are overlap length, overlap width, curing pressure and surface treatment.
The optimum condition determined for experimental factors can improve the bonding technique and design a high strength.
Properties of material shown in Table 2 such as Young's modulus, Poisson's ratio and so on is applied for this FEM model from results of testing tensile-experiment of adhesive and adherend.
Online since: September 2010
Authors: Hiroyuki Sasahara, Erween Abdul Rahim
Similarly, as reported by Ezugwu et al. [3], increasing the cutting speed and feed
rate increases the hardness and depth of the affected layer.
The lubricants used in this experiment were synthetic ester and palm oil and their properties were shown in Table 1.
These factors lead to an increased in cutting force which resulted in greater hardening effect.
The combinations of the aforementioned factors lead to the severe deformation underneath the machined surface.
These factors have led to the improvement on surface roughness.
The lubricants used in this experiment were synthetic ester and palm oil and their properties were shown in Table 1.
These factors lead to an increased in cutting force which resulted in greater hardening effect.
The combinations of the aforementioned factors lead to the severe deformation underneath the machined surface.
These factors have led to the improvement on surface roughness.
Online since: February 2022
Authors: Yakov Soler, Denis Kazimirov
External influences that change the properties of ‘smart’ materials can be mechanical loads, electric or magnetic fields, temperature, light, humidity, chemical properties of the environment, and others [3].
First, the surface microhardness changes, which is associated with some mechanical properties of the intermetallic compound [15, 16].
Second, special properties such as shape memory and pseudoelasticity can be affected.
These changes irreversibly affect the functional properties of NiTi, which are the main criteria for choosing SMA in the previously mentioned industries.
Vimieiro, Characterization of mechanical properties of an alloy with shape memory – nitinol, COBEM 2015 23rd ABCM Int.
First, the surface microhardness changes, which is associated with some mechanical properties of the intermetallic compound [15, 16].
Second, special properties such as shape memory and pseudoelasticity can be affected.
These changes irreversibly affect the functional properties of NiTi, which are the main criteria for choosing SMA in the previously mentioned industries.
Vimieiro, Characterization of mechanical properties of an alloy with shape memory – nitinol, COBEM 2015 23rd ABCM Int.
Online since: March 2017
Authors: Mohamad Johari bin Abu, Mohd Fariz Ab Rahman, Mohsen Ahmadipour, Zainal Arifin Ahmad, Rosyaini Afindi Zaman, Mohd Fadzil Ain, Julie Juliewatty Mohamed
The dielectric properties of the samples were investigated at frequency range of 20 – 106 Hz.
The trend of dielectric properties for CCTO sample is in agreement with several reports in literature [9, 13].
The phase structure, microstructure and dielectric properties of the fabricated samples were measured.
Thongbai, Improved dielectric properties of (Y+Mg) co-doped CaCu3Ti4O12 ceramics by controlling geometric and intrinsic properties of grain boundaries, Mater.
Hong, Effect of Al doping on the electric and dielectric properties of CaCu3Ti4O12, J.
The trend of dielectric properties for CCTO sample is in agreement with several reports in literature [9, 13].
The phase structure, microstructure and dielectric properties of the fabricated samples were measured.
Thongbai, Improved dielectric properties of (Y+Mg) co-doped CaCu3Ti4O12 ceramics by controlling geometric and intrinsic properties of grain boundaries, Mater.
Hong, Effect of Al doping on the electric and dielectric properties of CaCu3Ti4O12, J.
Online since: February 2012
Authors: Serena di Renzo, Giuseppina Ambrogio, Francesco Gagliardi, Domenico Umbrello
In fact, it has considerable effect on some properties such as wear resistance and fatigue strength; thus, the quality of the surface is of significant importance for evaluating the produced mechanical parts.
In order to understand how cutting conditions affect surface quality and properties in advance, it is necessary to employ theoretical models to do predictions in function of machining conditions.
As a consequence, a proper choice of these factors allows to enhance process performance and surface quality.
Furthermore, the ANOVA (Tab. 4) underlined the higher role played by the first order factors, the quadratic factors f2 and, as a consequence, by the first order interaction V*f.
In particular, apart of the linear influence from the single factors, a first order interaction V*f was also found.
In order to understand how cutting conditions affect surface quality and properties in advance, it is necessary to employ theoretical models to do predictions in function of machining conditions.
As a consequence, a proper choice of these factors allows to enhance process performance and surface quality.
Furthermore, the ANOVA (Tab. 4) underlined the higher role played by the first order factors, the quadratic factors f2 and, as a consequence, by the first order interaction V*f.
In particular, apart of the linear influence from the single factors, a first order interaction V*f was also found.
Online since: April 2011
Authors: Svetan Ratchev, Joel Segal, Shukri Afazov
In particular the distributed reinforcement, consisting of silicon carbide (SiC) or aluminum oxide (Al2O3), evokes especially high mechanical loads.
In case of ‘smeared modeling’ the composite is described as homogeneous material with averaged mechanical and thermal properties.
Results and Discussion In general during cutting large stresses and high temperatures occur, which cause interesting effects when machining MMC-materials because of different thermo-physical properties of the participating material ingredients.
Thereby, a precise prognosis of the stresses, deformations, temperatures and the resulting forces to the tools affecting the process areas can be executed, so the influence of different process parameters and geometric values on the resulting specific forces has been examined and discussed.
O´Reilly: Factors affecting the machinability of an Al/SiC metal-matrix composite, in: Journal of Materials Processing Technology, Vol. 43 (1994), pp. 21-36 [2] P.
In case of ‘smeared modeling’ the composite is described as homogeneous material with averaged mechanical and thermal properties.
Results and Discussion In general during cutting large stresses and high temperatures occur, which cause interesting effects when machining MMC-materials because of different thermo-physical properties of the participating material ingredients.
Thereby, a precise prognosis of the stresses, deformations, temperatures and the resulting forces to the tools affecting the process areas can be executed, so the influence of different process parameters and geometric values on the resulting specific forces has been examined and discussed.
O´Reilly: Factors affecting the machinability of an Al/SiC metal-matrix composite, in: Journal of Materials Processing Technology, Vol. 43 (1994), pp. 21-36 [2] P.
Online since: August 2013
Authors: Andrzej Nowotnik, Dariusz Szeliga, Ekaterina Rzyankina, Nawaz Mahomed
The results obtained were used as a basis for verification of imposed boundary conditions, heat coefficients physical materials factors, nucleation and grains growth coefficients that were used in the numerical simulations.
Diffraction Analysis for Single Crystal structures The properties of SX superalloys are highly dependent on their crystallographic direction.
Hence the assessment of crystallographic orientation is the basis to determining the mechanical properties.
This is primarily evident in terms of the primary dendrite arm spacing, which affects both the propensity for casting defects and the final mechanical properties.
Mechanical creep test investigations have shown improved properties for the samples with withdrawal velocity of 3 mm/min, compared to those with withdrawal velocities of 1 mm/min and 5 mm/min.
Diffraction Analysis for Single Crystal structures The properties of SX superalloys are highly dependent on their crystallographic direction.
Hence the assessment of crystallographic orientation is the basis to determining the mechanical properties.
This is primarily evident in terms of the primary dendrite arm spacing, which affects both the propensity for casting defects and the final mechanical properties.
Mechanical creep test investigations have shown improved properties for the samples with withdrawal velocity of 3 mm/min, compared to those with withdrawal velocities of 1 mm/min and 5 mm/min.
Online since: May 2011
Authors: Ping Ke Yan, Yu Juan Gao, Bin Wang
Nesquehonite whiskers can not only be used for preparation of high purity magnesium oxide, magnesium hydroxide, basic magnesium carbonate, magnesium sulfate, magnesium nitrate and other magnesium salt products, but also they can be directly used in enhancing and modifying plastics, rubber, coatings and inks, etc. because of their good mechanical properties.
With special physical and chemical properties and practical applications, nesquehonite whiskers have attracted wide interest of researchers [1-4].
In this paper, low-temperature aqueous solution method was used and through strictly controlling the reaction temperature, reaction time, surfactants and other main factors, the optimal synthesis conditions of high aspect ratios nesquehonite whiskers were explored.
Taking whisker morphology, reaction yield and other factors together into account, high aspect ratios whisker can be obtained when the reaction temperature range was controlled at 45 – 50°C.
The results (Fig. 4) showed that when reaction time reached 50 min, the whisker formed a better morphology (Fig. 5), but taking yields and other factors into account, the reaction time should be more than 60 min.
With special physical and chemical properties and practical applications, nesquehonite whiskers have attracted wide interest of researchers [1-4].
In this paper, low-temperature aqueous solution method was used and through strictly controlling the reaction temperature, reaction time, surfactants and other main factors, the optimal synthesis conditions of high aspect ratios nesquehonite whiskers were explored.
Taking whisker morphology, reaction yield and other factors together into account, high aspect ratios whisker can be obtained when the reaction temperature range was controlled at 45 – 50°C.
The results (Fig. 4) showed that when reaction time reached 50 min, the whisker formed a better morphology (Fig. 5), but taking yields and other factors into account, the reaction time should be more than 60 min.
Online since: October 2013
Authors: Xi Bing Li, Yun Shi Ma, Xun Wang, Ming Li
However, a MHP’s heat transfer performance is affected by many factors, among which, working fluid inventory has great influence on the security, reliability and frost resistance of its heat transfer performance.
Chiang etc. added magnetic-nano powders to the working fluid to enhance its flow and consequently improve the thermal properties, and their investigations showed when the input power is 60W, magnetic-nano powders can help enhance the thermal conductivity of the heat pipe by 60% [5].
In a word, working fluid inventory that is more or less than the appropriate amount will affect MHP’s heat transfer performance.
Conclusions For the capillary limit, which determines a MHP’s heat transfer capacity to a large extent, this study first established its mathematic model , upon which the factors that influence MHPs’ heat transfer performances are identified.
Bubphachot: Journal of Mechanical Science and Technology, Vol. 23 (2009), p. 2548-2554 [4] J.H.
Chiang etc. added magnetic-nano powders to the working fluid to enhance its flow and consequently improve the thermal properties, and their investigations showed when the input power is 60W, magnetic-nano powders can help enhance the thermal conductivity of the heat pipe by 60% [5].
In a word, working fluid inventory that is more or less than the appropriate amount will affect MHP’s heat transfer performance.
Conclusions For the capillary limit, which determines a MHP’s heat transfer capacity to a large extent, this study first established its mathematic model , upon which the factors that influence MHPs’ heat transfer performances are identified.
Bubphachot: Journal of Mechanical Science and Technology, Vol. 23 (2009), p. 2548-2554 [4] J.H.
Online since: July 2011
Authors: Yun Mook Lim, Kunhwi Kim, John E. Bolander
The mechanical properties of concrete materials vary with the loading rate under dynamic
conditions, which can influence the dynamic fracture behavior of structures.
Introduction In dynamic conditions, the responses of structural members are affected by the subjected loading rates.
The properties of concrete are kept from the direct tensile test and the calibrated visco-plastic parameters are also applied here.
The mechanical properties of several kinds of concrete at compressive, tensile, and flexural tests in high rates of loading.
Concrete: Structure, Properties, and Materials, pages 85--86.
Introduction In dynamic conditions, the responses of structural members are affected by the subjected loading rates.
The properties of concrete are kept from the direct tensile test and the calibrated visco-plastic parameters are also applied here.
The mechanical properties of several kinds of concrete at compressive, tensile, and flexural tests in high rates of loading.
Concrete: Structure, Properties, and Materials, pages 85--86.