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Online since: July 2018
Authors: Bing Sun, Wei Xu, Han Li
Domestic and Foreign Research Status and Existing Problems
High Temperature Mechanical Properties of Concrete.
High Temperature Mechanical Properties of Lining Structure.
Mechanical Property.
Review of Mechanical Properties of HSC at Elevated Temperature.
Experimental study on mechanical properties of high temperature steel fiber reinforced concrete.
High Temperature Mechanical Properties of Lining Structure.
Mechanical Property.
Review of Mechanical Properties of HSC at Elevated Temperature.
Experimental study on mechanical properties of high temperature steel fiber reinforced concrete.
Online since: April 2015
Authors: Serkan Abali
In this paper, yttrium aluminum garnet (YAG) – magnesium aluminate spinel (MAS) with good mechanical strength is fabricated by directional solidification, and its microstructure and mechanical properties were investigated.
Introduction Directionally solidified eutectic ceramics show superior mechanical properties.
Residual stress is attributed to failure behaviors in directionally solidified eutectic ceramic composites because the stresses ultimately affect the mechanical behavior of the melt growth composites (MGC).
Singh, Influence of fiber and interfacial properties on fracture behavior of fiber-reinforced ceramic composites, J.
Hirano, Application of eutectic composites to gas turbine system and fundamental fracture properties up to 1700 °C, J.
Introduction Directionally solidified eutectic ceramics show superior mechanical properties.
Residual stress is attributed to failure behaviors in directionally solidified eutectic ceramic composites because the stresses ultimately affect the mechanical behavior of the melt growth composites (MGC).
Singh, Influence of fiber and interfacial properties on fracture behavior of fiber-reinforced ceramic composites, J.
Hirano, Application of eutectic composites to gas turbine system and fundamental fracture properties up to 1700 °C, J.
Online since: February 2013
Authors: Beáta Šimeková, Ingrid Kovaříková, Koloman Ulrich
Taking advantages of these positive factors, duplex stainless steels are widely used in the oil and gas, petrochemical, pulp and paper, and pollution control industries [1].
The optimum properties of duplex stainless steels are achieved when nearly equal proportions of austenite and ferrite are present in the microstructure.
On the other hand, excessive time in the 705–980 oC range can cause formation of intermetallic phases having a similar detrimental influence on properties.
The present study has been concerned with plasma arc welding PAW (Fig.1) and laser beam welding processes and their effects on size and microstructure of fusion zone then, on the mechanical and corrosion properties of duplex stainless steel.
[10] Bunček, V., Study of properties of welding duplex stainless steel with plasma.
The optimum properties of duplex stainless steels are achieved when nearly equal proportions of austenite and ferrite are present in the microstructure.
On the other hand, excessive time in the 705–980 oC range can cause formation of intermetallic phases having a similar detrimental influence on properties.
The present study has been concerned with plasma arc welding PAW (Fig.1) and laser beam welding processes and their effects on size and microstructure of fusion zone then, on the mechanical and corrosion properties of duplex stainless steel.
[10] Bunček, V., Study of properties of welding duplex stainless steel with plasma.
Online since: January 2013
Authors: Jie Yang, Dragan Grubor, Aleksandar Subic, Ljiljana Tihacek Sojic, Aleksandra Milic Lemic
All materials used in the model were considered to be isotropic, homogeneous, and linearly elastic with their elastic properties listed in Table 1.
Mechanical properties of materials used in the 3D finite element models Materials Young’s Modulus [MPa] Poisson’s Ratio Cortical bone 14,000 0.30 Cancellous bone 1370 0.30 Titanium 110,000 0.35 3D finite element analysis was used for the quantitative evaluation of implant and surrounding bone stresses.
Standford, Micromotion and dynamic fatigue properties of dental implant – abutment interface, J.
Brunski, Biomechanical factors affecting the bone–dental implant inter- face, Clin.
Naert, The influence of bone mechanical properties and implant fixation upon bone loading around oral implants, Clin.
Mechanical properties of materials used in the 3D finite element models Materials Young’s Modulus [MPa] Poisson’s Ratio Cortical bone 14,000 0.30 Cancellous bone 1370 0.30 Titanium 110,000 0.35 3D finite element analysis was used for the quantitative evaluation of implant and surrounding bone stresses.
Standford, Micromotion and dynamic fatigue properties of dental implant – abutment interface, J.
Brunski, Biomechanical factors affecting the bone–dental implant inter- face, Clin.
Naert, The influence of bone mechanical properties and implant fixation upon bone loading around oral implants, Clin.
Online since: February 2014
Authors: Vladimir Luzin, Michael Law, Erwin Gamboa, Valerie Linton
This study attempts to determine some of the factors leading to the occurrence of SCC in high pressure natural gas transmission pipelines operating in Australia.
The SCC properties of ferritic steel pipes of the same grade were considered in relation to texture in [9] with conclusions coinciding with ours.
Though there are small differences is hardness, residual stress, and mechanical properties, this zone extends only 0.5 mm deep under the surface.
Law: Investigation of line pipe properties on SCC susceptibility of pipelines, APIA report 07-07
Mecking, Texture and Anisotropy: Preferred Orientations in Polycrystals and their Effect on Materials Properties, Cambridge University Press, 2000
The SCC properties of ferritic steel pipes of the same grade were considered in relation to texture in [9] with conclusions coinciding with ours.
Though there are small differences is hardness, residual stress, and mechanical properties, this zone extends only 0.5 mm deep under the surface.
Law: Investigation of line pipe properties on SCC susceptibility of pipelines, APIA report 07-07
Mecking, Texture and Anisotropy: Preferred Orientations in Polycrystals and their Effect on Materials Properties, Cambridge University Press, 2000
Online since: July 2012
Authors: C.A. Featherston, Rhys Pullin, Mark J. Eaton, O.J. Wood, D. Kennedy
Research is being undertaken to investigate the various factors affecting the power output of such a system, including the design of the harvesters used (length, width, number of layers), their positioning and their orientation.
The weighting factors for the plate are shown in Table 5.
Again this would affect the overall optimal position of a harvester.
The implementation of such systems however is currently restricted by factors such as the lack of a no maintenance power supply.
Waanders, Piezoelectric Ceramics: Properties and Applications.
The weighting factors for the plate are shown in Table 5.
Again this would affect the overall optimal position of a harvester.
The implementation of such systems however is currently restricted by factors such as the lack of a no maintenance power supply.
Waanders, Piezoelectric Ceramics: Properties and Applications.
Online since: April 2013
Authors: Mariaenrica Frigione, Francesca Lionetto, Leno Mascia, Antonio Antonacci
In this field, there is great concern regarding the long term behavior of the rehabilitated structures for outdoor applications, where environmental factors can bring about severe deterioration in particular in the glass transition temperatures (Tg).
The results of the DMTA tests in Fig. 2 indicate an appreciable improvement in the mechanical properties of the hybrid system compared to those of the corresponding unmodified or partially modified adhesives.
The flexural mechanical data shown in Table 2 for the different systems examined illustrate the significant enhancement in mechanical properties resulting from the progressive modification of the epoxy resin, up to obtain a hybrid system displaying an appreciable improvement in mechanical properties (around 60% for strength and more than doubled for the stiffness) provided by the efficient reinforcement of the inorganic phase (siloxane domains).
In brackets, the percentage difference in properties compared to those of un-aged specimens is evidenced.
Again, in presence of harsh conditions, the adhesion properties of the hybrid system are less impaired.
The results of the DMTA tests in Fig. 2 indicate an appreciable improvement in the mechanical properties of the hybrid system compared to those of the corresponding unmodified or partially modified adhesives.
The flexural mechanical data shown in Table 2 for the different systems examined illustrate the significant enhancement in mechanical properties resulting from the progressive modification of the epoxy resin, up to obtain a hybrid system displaying an appreciable improvement in mechanical properties (around 60% for strength and more than doubled for the stiffness) provided by the efficient reinforcement of the inorganic phase (siloxane domains).
In brackets, the percentage difference in properties compared to those of un-aged specimens is evidenced.
Again, in presence of harsh conditions, the adhesion properties of the hybrid system are less impaired.
Online since: August 2011
Authors: Yong Ma, Zhi Feng Lou, Wen Rui Chen
Material mechanics and dynamic properties affect the service life of parts, and also the normal operation of machines.
The surface faults of mechanical parts are considered to be the most important factor to affect the service life and to some extent the normal operation of a machine.
It has many advantages in improving properties of materials and increasing their service life.
It helped to prevent the formation of surface micro-cracks, increase the service life of parts, and improved the mechanical properties of the metal surface.
Basic properties of materials were that yield strength was 355MPa and the tensile strength was 600MPa.
The surface faults of mechanical parts are considered to be the most important factor to affect the service life and to some extent the normal operation of a machine.
It has many advantages in improving properties of materials and increasing their service life.
It helped to prevent the formation of surface micro-cracks, increase the service life of parts, and improved the mechanical properties of the metal surface.
Basic properties of materials were that yield strength was 355MPa and the tensile strength was 600MPa.
Online since: May 2006
Authors: Mikio Iwamoto, Junji Ikeda, Masaru Ueno
Influence of Complex Frictional Heating and Mechanical Stress Effect
for Surface Crystalline Structure Change of Zirconia Femoral Head
Masaru Ueno a
, Mikio Iwamoto
b
and Junji Ikeda c
Japan Medical Materials Corporation, Uemura Nissei Bldg. 9F 3-3-31 Miyahara,
Yodogawa-ku, Osaka 532-0003 Japan
a
uenom@jmmc.jp, biwamotom@jmmc.jp,
cikedaj@jmmc.jp
Keywords: Zirconia, Phase Transformation, Wear, Hip simulator
Abstract: Several clinical reports pointed out that the monoclinic transformation of crystalline
structure of zirconia femoral head with clinical service time can cause the changes of surface
roughness and mechanical properties.
On the other side of these desirable properties of zirconia heads for THP, transformation of the surface crystalline structure and mechanical degradation of zirconia heads were sometimes reported as the possible cause of clinical failure of zirconia THP system.
Y-TZP has been used for femoral head replacement due to the good mechanical properties and excellent biocompatibility.
As mentioned above, the phase transformation characteristics would be affected by not only temperature but also mechanical stress.
Conclusion We found that surface degradation of zirconia would be accelerated by hip simulator motion and mechanical stress effect would act as an important factor as much as surrounding temperature or frictional heating.
On the other side of these desirable properties of zirconia heads for THP, transformation of the surface crystalline structure and mechanical degradation of zirconia heads were sometimes reported as the possible cause of clinical failure of zirconia THP system.
Y-TZP has been used for femoral head replacement due to the good mechanical properties and excellent biocompatibility.
As mentioned above, the phase transformation characteristics would be affected by not only temperature but also mechanical stress.
Conclusion We found that surface degradation of zirconia would be accelerated by hip simulator motion and mechanical stress effect would act as an important factor as much as surrounding temperature or frictional heating.
Online since: October 2017
Authors: Satoshi Iwasaki, Masuo Hagiwara, Tomonori Kitashima, Somesh Kumar Bhattacharya, Ryoji Sahara
Prediction of the Creep and Tensile Properties of Near-α Titanium Alloys
T.
Regression analysis is a powerful tool for predicting the properties of such complicated alloys.
In this study, the volume fraction of equiaxed α was considered a microstructural factor in the regression analysis because of its significant influence on the mechanical properties, which is discussed later.
The mechanical properties of near-α alloys are strongly dependent on microstructure factors such as the volume fraction of equiaxed α, thickness of α lamellar, etc.
In this study, only the volume fraction of equiaxed α in microstructure factors was incorporated into Equations (1) and (2) as a descriptive variable.
Regression analysis is a powerful tool for predicting the properties of such complicated alloys.
In this study, the volume fraction of equiaxed α was considered a microstructural factor in the regression analysis because of its significant influence on the mechanical properties, which is discussed later.
The mechanical properties of near-α alloys are strongly dependent on microstructure factors such as the volume fraction of equiaxed α, thickness of α lamellar, etc.
In this study, only the volume fraction of equiaxed α in microstructure factors was incorporated into Equations (1) and (2) as a descriptive variable.