Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: September 2014
Authors: Hiroshi Utsunomiya, Ryo Matsumoto, Nobuyuki Hattori
Mechanical properties, e.g., fatigue strength and bendability,of metal sheets, can be improved by the residual stress.
The effects are important for industries because the properties can be improved without adding expensive alloying elements.
The rolls were lubricated by mechanical oil.
It is found that the aspect ratio of the roll bite is a main factor to affect the distribution of the residual stress in low friction.
Kawata, Journal of the Japan Society of Mechanical Engineers, 55 (1952) 720-726
The effects are important for industries because the properties can be improved without adding expensive alloying elements.
The rolls were lubricated by mechanical oil.
It is found that the aspect ratio of the roll bite is a main factor to affect the distribution of the residual stress in low friction.
Kawata, Journal of the Japan Society of Mechanical Engineers, 55 (1952) 720-726
Online since: May 2014
Authors: Shuhei Matsuzawa, Fumikazu Miyasaka, Gaku Yoshikawa
In FSW, the heat transfer is very important factor.
Table 1 Material property Material A1100 Density[kg/m3] 2710 Thermal conductivity[W/m・K] 234 Specific heat[J/Kg・K] 900 a[MPa-1] 0.045 A exp(24.67) n 5.66 Q 158300 Calculated result The illustration of analyzed model is showed in Fig.1 and initial particle arrangement which correspond to Fig.1 is showed in Fig.2.
As a result, the flow is very affected by shoulder rotation.
[4] M Song and R Kovacevic, “Numerical and experimental study of the heat transfer process in friction stir welding”, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 217 (1), pp. 73-85
Table 1 Material property Material A1100 Density[kg/m3] 2710 Thermal conductivity[W/m・K] 234 Specific heat[J/Kg・K] 900 a[MPa-1] 0.045 A exp(24.67) n 5.66 Q 158300 Calculated result The illustration of analyzed model is showed in Fig.1 and initial particle arrangement which correspond to Fig.1 is showed in Fig.2.
As a result, the flow is very affected by shoulder rotation.
[4] M Song and R Kovacevic, “Numerical and experimental study of the heat transfer process in friction stir welding”, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 217 (1), pp. 73-85
Online since: May 2021
Authors: Sri Sudiono, Sri Juari Santosa, Adhitama Widya Pangestika
The initial adsorbate concentration was one of the factors that affect the adsorption capacity in this study.
Cranston, Chemically cross-linked cellulose nanocrystal aerogels with shape recovery and superabsorbent properties, Chem.
Headley, Adsorption properties of cross-linked cellulose-epichlorohydrin polymers in aqueous solution, Carbohydr.
Narayanasamy, Microstructural, physico-chemical and mechanical characterisation of Sansevieria cylindrica fibres - An exploratory investigation, Mater.
Saravanakumar, Isolation and characterization of cellulose fibers from Thespesia populnea barks: A study on physicochemical and structural properties, Int.
Cranston, Chemically cross-linked cellulose nanocrystal aerogels with shape recovery and superabsorbent properties, Chem.
Headley, Adsorption properties of cross-linked cellulose-epichlorohydrin polymers in aqueous solution, Carbohydr.
Narayanasamy, Microstructural, physico-chemical and mechanical characterisation of Sansevieria cylindrica fibres - An exploratory investigation, Mater.
Saravanakumar, Isolation and characterization of cellulose fibers from Thespesia populnea barks: A study on physicochemical and structural properties, Int.
Online since: August 2013
Authors: Zhi Xiong Chen, Ying Hu
The response of reinforced concrete buildings to earthquake loads can be substantially affected by the influence of infill walls.
Figure 3 In-plane monotonic and cyclic displacement-force relationship of the proposed model The width of the equivalent strut w is determined by means of the relative stiffness parameter lh proposed by Stafford-Smith [2] and by two constants K1 and K2 calibrated on the basis of experimental tests: (8) where lh is a non-dimensional parameter depending on the geometric and mechanical characteristics of the frame-infill system, K1 and K2 are coefficients that change according to lh, and d is the length of the equivalent strut.
Table 1 Properties of the masonry and its components Mean compressive strength/mean elastic modulus [N/mm2] Mortar Calcarenite Clay tile block Calcarenite masonry Clay tile masonry Calcarenite masonry Claytile masonry Along the holes Orthogonal to the holes 4.1/6100 6.1/3810 6.5/3600 7.5/3750 4/9000 19.5/3870 3.1/1310 According to the test result in Table 1, the parameters used for the proposed model are: for specimen I1, sm=4.1Mpa, Em=6.1Gpa, τm0=0.85Mpa, the strength of the strut element Vm=199KN, and the stiffness Km=86 KN/mm; for specimen I5, sm=6.1Mpa, Em =3.81Gpa, τm0=1.0Mpa, the strength of the strut element Vm =168KN, and the stiffness Km=47 KN/mm.
What’s more, in Figure 6 (b) and Figure 7 (b), the comparisons are made between the experimental responses and the analytical ones obtainable by using the mechanical law proposed by Klingner and Bertero; from the shapes of the cycles, it can be clearly found the improvement of the results obtainable by means of the proposed analytical approach.
The h/t for this panel was around 11.5, and Δcr was about 4.5 mm, resulting in a reduction factor R1 of 0.73.
Figure 3 In-plane monotonic and cyclic displacement-force relationship of the proposed model The width of the equivalent strut w is determined by means of the relative stiffness parameter lh proposed by Stafford-Smith [2] and by two constants K1 and K2 calibrated on the basis of experimental tests: (8) where lh is a non-dimensional parameter depending on the geometric and mechanical characteristics of the frame-infill system, K1 and K2 are coefficients that change according to lh, and d is the length of the equivalent strut.
Table 1 Properties of the masonry and its components Mean compressive strength/mean elastic modulus [N/mm2] Mortar Calcarenite Clay tile block Calcarenite masonry Clay tile masonry Calcarenite masonry Claytile masonry Along the holes Orthogonal to the holes 4.1/6100 6.1/3810 6.5/3600 7.5/3750 4/9000 19.5/3870 3.1/1310 According to the test result in Table 1, the parameters used for the proposed model are: for specimen I1, sm=4.1Mpa, Em=6.1Gpa, τm0=0.85Mpa, the strength of the strut element Vm=199KN, and the stiffness Km=86 KN/mm; for specimen I5, sm=6.1Mpa, Em =3.81Gpa, τm0=1.0Mpa, the strength of the strut element Vm =168KN, and the stiffness Km=47 KN/mm.
What’s more, in Figure 6 (b) and Figure 7 (b), the comparisons are made between the experimental responses and the analytical ones obtainable by using the mechanical law proposed by Klingner and Bertero; from the shapes of the cycles, it can be clearly found the improvement of the results obtainable by means of the proposed analytical approach.
The h/t for this panel was around 11.5, and Δcr was about 4.5 mm, resulting in a reduction factor R1 of 0.73.
Online since: April 2020
Authors: Chanchana Thanachayanont, Adisorn Tuantranont, Thapanee Sarakonsri, Thammanoon Kapanya
[6] Rogl, G., Rogl, P., How nanoparticles can change the figure of merit, ZT, and mechanical properties of skutterudites.
-D., Enhanced thermoelectric properties in CoSb3-xTex alloys prepared by mechanical alloying and spark plasma sintering.
-G., Hu, X., Thermoelectric properties of rare earths filled CoSb3 based nanostructure skutterudite.
[43] Choi, M.K., Ur, S.C., Kwon, J.C., Cho, K.W., Kim, I.H., Lee, Y.G., Ryu, S.L., Mechanical alloying and thermoelectric properties of CoSb3 skutterudite.
-C., Thermoelectric properties of Sn-doped CoSb3 prepared by encapsulated induction melting.
-D., Enhanced thermoelectric properties in CoSb3-xTex alloys prepared by mechanical alloying and spark plasma sintering.
-G., Hu, X., Thermoelectric properties of rare earths filled CoSb3 based nanostructure skutterudite.
[43] Choi, M.K., Ur, S.C., Kwon, J.C., Cho, K.W., Kim, I.H., Lee, Y.G., Ryu, S.L., Mechanical alloying and thermoelectric properties of CoSb3 skutterudite.
-C., Thermoelectric properties of Sn-doped CoSb3 prepared by encapsulated induction melting.
Online since: October 2010
Authors: Bernd-Arno Behrens, Anas Bouguecha, Julian Knigge, Katrin Weilandt, Kathrin Voges-Schwieger, Sven Hübner
As a result of this structuring, the material was to be
additionally stretched on these points to facilitate a change in the component properties.
Fig. 1: Reinforcement of metastable austenitic materials [16] For sheet-metal materials there exist a number of analyses that illustrate the effects of parameters on the martensite development and on the factors of increased strengthening.
By furthering the research of the mechanisms that lead to martensite formation during the forming process, the material properties, and therefore the component properties, can be controlled at points under particular load, by means of localized adjustment or changing of the grain structure.
Voges-Schwieger.: Local martensitic high-strength structure fields - material properties of metastable austenitic steel.
Talonen: Effect of strain-induced α'-martensite transformation on mechanical properties of metastable austenitic stainless steels.
Fig. 1: Reinforcement of metastable austenitic materials [16] For sheet-metal materials there exist a number of analyses that illustrate the effects of parameters on the martensite development and on the factors of increased strengthening.
By furthering the research of the mechanisms that lead to martensite formation during the forming process, the material properties, and therefore the component properties, can be controlled at points under particular load, by means of localized adjustment or changing of the grain structure.
Voges-Schwieger.: Local martensitic high-strength structure fields - material properties of metastable austenitic steel.
Talonen: Effect of strain-induced α'-martensite transformation on mechanical properties of metastable austenitic stainless steels.
Online since: July 2022
Authors: Lorenzo Donati, Marco Negozio, Sara Di Donato
Owing to the complexity of the equations, the values of the factor are available only in tabular or graphical form.
It is known that the wire drawing process depends on three main parameters: the wire material properties, the die geometry (such as die angle and reduction ratio) and the process conditions (such as friction at the interface between the die and the wire).
Table 1 Comparison between the mechanical characteristics of Machine 1 and Machine 2.
· The different elongation ratios of the machines affect the homogeneity of the deformation.
Indeed, it is necessary that the mechanical elongation ratio of the machine remains lower than the elongation ratio of the wire.
It is known that the wire drawing process depends on three main parameters: the wire material properties, the die geometry (such as die angle and reduction ratio) and the process conditions (such as friction at the interface between the die and the wire).
Table 1 Comparison between the mechanical characteristics of Machine 1 and Machine 2.
· The different elongation ratios of the machines affect the homogeneity of the deformation.
Indeed, it is necessary that the mechanical elongation ratio of the machine remains lower than the elongation ratio of the wire.
Online since: September 2015
Authors: Hussein Mohammed Alalem
SMA as NiTi, exhibits very peculiar and interesting functional physical properties due to the occurrence of a solid-to-solid phase transition involving the austenite and martensite phases, favored at high and low temperature, respectively.
They constructed a 6 x 6 prototype shape display using RC servomotors to actuate an array of mechanical pins.
These factors mean that their display cannot be used in high bandwidth applications [12].
B Adamson for his contribution to make the mechanical parts of the work.
Brandies: On the transformation behaviour, mechanical properties and biocompatibility of two NiTi-based shape memory alloys NiTi42 and NiTi42Cu7, vol. 22, no. 15, pp. 2153-2161(9) Elsevier Science (2001)
They constructed a 6 x 6 prototype shape display using RC servomotors to actuate an array of mechanical pins.
These factors mean that their display cannot be used in high bandwidth applications [12].
B Adamson for his contribution to make the mechanical parts of the work.
Brandies: On the transformation behaviour, mechanical properties and biocompatibility of two NiTi-based shape memory alloys NiTi42 and NiTi42Cu7, vol. 22, no. 15, pp. 2153-2161(9) Elsevier Science (2001)
Online since: November 2011
Authors: Guo You Gan, Jing Hong Du, Jun Yuan, Ji Kang Yan, Jian Hong Yi
ABS has recently attracted attentions because of its good impact and oil resistance, high mechanical strength at low temperature (-40°{TTP}40
C, excellent processability, such as integrated performance[1].
ABS with hydrophobic and oleophobic property would meet the needs of requirement usage.
Hydrophilic and hydrophobic property of material surface mainly depend on chemical compositions and microstructure of material surface [4].
There were no great breakthroughs in theoretical research such as the mechanism of hydrophobic and oleophobic, and main factor of affection hydrophobic and oleophobic property, thus Wenzel model [23] and Cassie model [24] were built to explain hydrophobic and oleophobic.
In Fig.2, the additive affect surface energy of ABS laminates to a certain extent, lead to change of contact angle with water, but the contact angle still belong to the hydrophilic range.
ABS with hydrophobic and oleophobic property would meet the needs of requirement usage.
Hydrophilic and hydrophobic property of material surface mainly depend on chemical compositions and microstructure of material surface [4].
There were no great breakthroughs in theoretical research such as the mechanism of hydrophobic and oleophobic, and main factor of affection hydrophobic and oleophobic property, thus Wenzel model [23] and Cassie model [24] were built to explain hydrophobic and oleophobic.
In Fig.2, the additive affect surface energy of ABS laminates to a certain extent, lead to change of contact angle with water, but the contact angle still belong to the hydrophilic range.
Online since: December 2012
Authors: Rui Tao Peng, Xiong Wei Liu, Xu Zhang, Xin Zi Tang
Wind Tunnel Experimental Study of Wind Turbine Airfoil Aerodynamic Characteristics
Xinzi Tang1, 2, a, Xu Zhang3, b, Ruitao Peng*1, 2, c and Xiongwei Liu2, d
1School of Mechanical Engineering, Xiangtan University, China
2School of Computing, Engineering and Physical Science, University of Central Lancashire, UK
3School of Engineering and Technology, University of Hertfordshire, UK
axtang4@uclan.ac.uk, bx.zhang@hert.ac.uk, crtpeng@uclan.ac.uk, dxliu9@uclan.ac.uk
Keywords: Wind turbine blade, Airfoil, Aerodynamic, Wind tunnel, Reynolds number.
Although the lift slope and zero-lift-angle remained unchanged as Re number varies for a wing section, the maximum lift and stall properties were greatly affected [1].
On the other hand, there are research works on the Re number below 1×105.It was said that the airfoil aerodynamic properties deteriorate dramatically when the Re number is below 1×105 [6].
The main effect of the buoyancy is considered in the velocity correction in equations (5) and (6) with a factor of [11].
Although the lift slope and zero-lift-angle remained unchanged as Re number varies for a wing section, the maximum lift and stall properties were greatly affected [1].
On the other hand, there are research works on the Re number below 1×105.It was said that the airfoil aerodynamic properties deteriorate dramatically when the Re number is below 1×105 [6].
The main effect of the buoyancy is considered in the velocity correction in equations (5) and (6) with a factor of [11].