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Online since: September 2011
Authors: Shuai Qi Song, Jin Min Guo, Ling Li Zhu
At the same time, its mechanical properties and permeability were controlled in a good condition.
Test Method Test is under the "GB/T50081-2002 mechanical properties of ordinary concrete test method standards” determined.
Factors and levels are shown in Table 5.
From Table 7 we can see that use 7d compressive strength of coal gangue concrete as assessment indicators in the range of experimental factors levels, the order of the factors effect is Gangue> Slag>Fly ash, optimal scheme is A2B2C2; use 28d compressive strength of coal gangue concrete as assessment indicators, the order of the factors effect is Fly ash > Gangue > Slag, optimal scheme is A2B3C2.
By adjusting the three factors component, it can be control the gangue concrete mechanical properties and impermeability in a better level and improve the durability of concrete, full use of waste, protect the environment.
Test Method Test is under the "GB/T50081-2002 mechanical properties of ordinary concrete test method standards” determined.
Factors and levels are shown in Table 5.
From Table 7 we can see that use 7d compressive strength of coal gangue concrete as assessment indicators in the range of experimental factors levels, the order of the factors effect is Gangue> Slag>Fly ash, optimal scheme is A2B2C2; use 28d compressive strength of coal gangue concrete as assessment indicators, the order of the factors effect is Fly ash > Gangue > Slag, optimal scheme is A2B3C2.
By adjusting the three factors component, it can be control the gangue concrete mechanical properties and impermeability in a better level and improve the durability of concrete, full use of waste, protect the environment.
Online since: November 2007
Authors: S.H. Park, J.M. Park, H.S. Lee, K.S. Min, A.R. Pae, N.R. Kang
Introduction
The pure machined titanium implants are widely used in orthopedic and dental surgeries due to their
excellent biocompatibility and mechanical properties which lead to successful clinical performance
in implant dentistry.
Recently, published in vivo investigations have shown significantly improved bone tissue reactions by modification of the surface oxide properties of titanium[7].
These results will affect the initial stability and removal torques and histological osseous healing of the implant[3,5].
The insulin-like growth factor 1 receptor binds insulin-like growth factor with a high affinity.
Among the molecules affecting the cell mitogenecity, fibroblast growth factor-7, 5, Platelet derived growth factor C peptide, Bone morphogenic protein 1, Transforming growth factor β1 were definitely down regulated on anodized surface compared with machined surface.
Recently, published in vivo investigations have shown significantly improved bone tissue reactions by modification of the surface oxide properties of titanium[7].
These results will affect the initial stability and removal torques and histological osseous healing of the implant[3,5].
The insulin-like growth factor 1 receptor binds insulin-like growth factor with a high affinity.
Among the molecules affecting the cell mitogenecity, fibroblast growth factor-7, 5, Platelet derived growth factor C peptide, Bone morphogenic protein 1, Transforming growth factor β1 were definitely down regulated on anodized surface compared with machined surface.
Online since: December 2012
Authors: Chun Lei Ju, Guo Dong Zhao, Feng Gao
The stress effect is affected by the coal pillar size and the properties of the coal pillar and surrounding rocks.
These factors may cause the variation of the stress concentration, which could cause the difference in the stress distribution on the bottom seam.
(2) The critical width of protection pillar in Fucheng mine The plastic zone width of the coal pillar is affected by the thickness of coal seam mining, mining depth, mining-induced stress increased coefficient, the internal friction angle of the coal pillar, cohesion and support resistance and other factors.
(I) Theoretical calculation of the coal pillar size According to the measured physical and mechanical properties of Fucheng mine’s each seam, we can calculated the theoretical coal pillar size calculation of Fucheng mine by using the formula (4),see the Tab.1.
And considering the safety factors, the protective coal pillar size of No.1 coal roadway is 8m.
These factors may cause the variation of the stress concentration, which could cause the difference in the stress distribution on the bottom seam.
(2) The critical width of protection pillar in Fucheng mine The plastic zone width of the coal pillar is affected by the thickness of coal seam mining, mining depth, mining-induced stress increased coefficient, the internal friction angle of the coal pillar, cohesion and support resistance and other factors.
(I) Theoretical calculation of the coal pillar size According to the measured physical and mechanical properties of Fucheng mine’s each seam, we can calculated the theoretical coal pillar size calculation of Fucheng mine by using the formula (4),see the Tab.1.
And considering the safety factors, the protective coal pillar size of No.1 coal roadway is 8m.
Online since: August 2013
Authors: Peng Tao Liu, Xue Si Liu, Jin Gang Liu
Regression analysis was used to study which of the calendering conditions was the dominant factor influencing the paper properties.
Calendering is the final chance to affect paper properties in the papermaking process of art paper.
The paper is molded by mechanical work and plasticizing of the web.
The basic properties of pigments were listed in Table 2.
Regression analysis was used to study which of the calendering conditions was the dominant factor influencing the paper properties.
Calendering is the final chance to affect paper properties in the papermaking process of art paper.
The paper is molded by mechanical work and plasticizing of the web.
The basic properties of pigments were listed in Table 2.
Regression analysis was used to study which of the calendering conditions was the dominant factor influencing the paper properties.
Online since: June 2012
Authors: Wei Lv, Di Wu, Zhuang Li
The important factors that affect the formability of the cold forging steel are its surface quality and internal defects.
The important factors that affect the formability of the cold forging steel are its surface quality and internal defects.
Oxides are brittle, and crushed by mechanical forces easily.
The presence of these inclusions results in the generation of the crack in rods owing to significant stress concentration, which can affect the deformation behavior.
Bert, Influence of non-metallic inclusions on the fatigue properties of heavily cold drawn steel wires, Procedia Engineering. 2 (2010) 173-181
The important factors that affect the formability of the cold forging steel are its surface quality and internal defects.
Oxides are brittle, and crushed by mechanical forces easily.
The presence of these inclusions results in the generation of the crack in rods owing to significant stress concentration, which can affect the deformation behavior.
Bert, Influence of non-metallic inclusions on the fatigue properties of heavily cold drawn steel wires, Procedia Engineering. 2 (2010) 173-181
Online since: June 2011
Authors: Xiao Li Zou
Since the fatigue crack propagation process from initial size till final fracture is affected by lots of random factors, it is difficult to evaluate the fatigue reliability.
Since the fatigue crack propagation process from initial size till final fracture are affected by lots of random factors, such as uncertainty of material resistance, randomness of service loading and difference in specimen geometry, it is difficult to analyze and compute the fatigue reliability.
Let initial crack size be , the crack size at time can be derived through integrating from Eq.1 as (3) and the maximum stress intensity factor (4) Whenever the maximum stress intensity factor exceeds fracture toughness of material , fracture failure occurs.
As a mechanical property of material, fracture toughness also has stochastic characteristic.
Accordingly, the multiplying and power factor can be randomized and JC method is also applicable for spectrum loading.
Since the fatigue crack propagation process from initial size till final fracture are affected by lots of random factors, such as uncertainty of material resistance, randomness of service loading and difference in specimen geometry, it is difficult to analyze and compute the fatigue reliability.
Let initial crack size be , the crack size at time can be derived through integrating from Eq.1 as (3) and the maximum stress intensity factor (4) Whenever the maximum stress intensity factor exceeds fracture toughness of material , fracture failure occurs.
As a mechanical property of material, fracture toughness also has stochastic characteristic.
Accordingly, the multiplying and power factor can be randomized and JC method is also applicable for spectrum loading.
Online since: August 2023
Authors: Flaviu Corb, Traian Buidos, Caius Stănășel, Iulian Stănășel, Gabriela-Victoria Mnerie
An important problem for plastic injection moulding companies is the deterioration of mould nests due to several factors such as wear and tear caused by heavy use, corrosion, misuse, etc.
These defects, even small ones, can affect the injection moulded product.
The service life of moulds depends on many factors such as the quality of the materials of the components, the heat treatment, the technical design, the manufacturing process of the components, the handling by operators.
The deposited material has good metallurgical properties and forms a good bond with the basic material, post-deposition heat treatments can be applied and the equipment used ensures complex geometric shapes of depositions.
Although the advent of high-performance processes has facilitated more efficient die repair, the multitude of influencing factors requires special attention and makes the necessity of depth studies for process selection and determination of the best process parameters.
These defects, even small ones, can affect the injection moulded product.
The service life of moulds depends on many factors such as the quality of the materials of the components, the heat treatment, the technical design, the manufacturing process of the components, the handling by operators.
The deposited material has good metallurgical properties and forms a good bond with the basic material, post-deposition heat treatments can be applied and the equipment used ensures complex geometric shapes of depositions.
Although the advent of high-performance processes has facilitated more efficient die repair, the multitude of influencing factors requires special attention and makes the necessity of depth studies for process selection and determination of the best process parameters.
Online since: April 2016
Authors: A. Zamani, H. Soleimani, M. Sabet, S.N. Hosseini, Z. Hosseini
Nano particles have the highest surface area to volume ratio with the lowest imperfection (fineness), and thus possess superior mechanical, chemical, physical and thermal properties.
Overall these properties make SiO2 a suitable candidate for wettability alteration in EOR [29].
Temperature effects on IFT is also one of the factors that should be considered.
Current review explores the factors impacting each one of the study cases.
On the other hand, any adjustment on one factor might affect the other factors, for instance in permeability studies it is showed that retention in narrow pore throats can reduce permeability.
Overall these properties make SiO2 a suitable candidate for wettability alteration in EOR [29].
Temperature effects on IFT is also one of the factors that should be considered.
Current review explores the factors impacting each one of the study cases.
On the other hand, any adjustment on one factor might affect the other factors, for instance in permeability studies it is showed that retention in narrow pore throats can reduce permeability.
Online since: January 2011
Authors: Yu Long Ding, Xiao Ming Liu, Ling Ling Zhang, Da Qiang Cang, Su Qin Li
This work investigates the disinfection properties of ZnO nanofluids, especially the change of ZnO disinfection properties when facing different shaking speeds of incubator (50rpm, 100rpm, 200rpm and 300rpm).
Nano-scaled materials with at least one critical dimension less than ~100nm, if properly engineered, have unique electrical, thermal, mechanical, chemical, and biological properties.
Previous work showed that there were many factors that would affect the antimicrobial activities of ZnO[7, 10].
These factors include particle concentration, particle size, surface area, temperature, lattice constant, and presence of surfactant.
Though many antimicrobial factors which could affect the antimicrobial activities of ZnO were studied, there is no work studying on the effect of shaking speed of incubator, which is the main objective of this work.
Nano-scaled materials with at least one critical dimension less than ~100nm, if properly engineered, have unique electrical, thermal, mechanical, chemical, and biological properties.
Previous work showed that there were many factors that would affect the antimicrobial activities of ZnO[7, 10].
These factors include particle concentration, particle size, surface area, temperature, lattice constant, and presence of surfactant.
Though many antimicrobial factors which could affect the antimicrobial activities of ZnO were studied, there is no work studying on the effect of shaking speed of incubator, which is the main objective of this work.
Online since: July 2013
Authors: Zhong Yun Fan, Huang Yan, Zen Cassinath, Ming Xu Xia
The microstructures consisted mainly of globular primary phase α-Mg particles embedded in a secondarily solidified dendritic network with consistent properties along both the longitudinal and transverse cross sections.
There are two major factors that contribute to the development of the non-dendritic structure of the slurry within the extruder.
Mechanical Behaviour.
These factors were seen to directly impact the mechanical behaviour of the extruded rods.
Pinet, Correlating the microstructure and the tensile properties of a thixomouldedAZ91D Mg Alloy, Acta Mater. 49 (2001) 1225-1235.
There are two major factors that contribute to the development of the non-dendritic structure of the slurry within the extruder.
Mechanical Behaviour.
These factors were seen to directly impact the mechanical behaviour of the extruded rods.
Pinet, Correlating the microstructure and the tensile properties of a thixomouldedAZ91D Mg Alloy, Acta Mater. 49 (2001) 1225-1235.