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Online since: August 2014
Authors: Xia Guo, Zeng Shan Li, Wen Chao Zhang, Ri Ming Tan, Zhi Dong Guan
Hart-Smith et al. [1] analyzed the influence of a variety of factors on the strength of adhesive-bonded composite scarf joints through analytic methods.
It is important to know how these flaws could affect the strength of the bonded component.
Mechanical properties of composite materials used in the model are listed in Table 1.
Fig. 2 Three dimension model of composite scarf jonits Fig. 3 Sketch of interfaces and bulk adhesive of composite scarf joints The mechanical behaviour of scarf joints depends on several factors, such as the strength of the composite–adhesive interface, the strength of the adhesive and the strength of the composite itself, shown in Fig.3.
The debond flaws affects the shear and peel stress distributions along bond-line.
It is important to know how these flaws could affect the strength of the bonded component.
Mechanical properties of composite materials used in the model are listed in Table 1.
Fig. 2 Three dimension model of composite scarf jonits Fig. 3 Sketch of interfaces and bulk adhesive of composite scarf joints The mechanical behaviour of scarf joints depends on several factors, such as the strength of the composite–adhesive interface, the strength of the adhesive and the strength of the composite itself, shown in Fig.3.
The debond flaws affects the shear and peel stress distributions along bond-line.
Online since: November 2011
Authors: Xing Juan Wang, Hong Li, Ran Liu, Li Guang Zhu, Jue Fang
Compressive strength of coke in blast furnace is influenced by three main factors: property, temperature and carbon loss rate.
Coke properties mainly include internal structure, chemical composition, size and reactivity and other aspects[5].
Coke bears mechanical effects in blast furnace, chemical corrosion and high thermal stress.
High temperature and carbon loss are key factors to decline the strength of coke in blast furnace.
Normal properties of the selected coke are shown in table 1.
Coke properties mainly include internal structure, chemical composition, size and reactivity and other aspects[5].
Coke bears mechanical effects in blast furnace, chemical corrosion and high thermal stress.
High temperature and carbon loss are key factors to decline the strength of coke in blast furnace.
Normal properties of the selected coke are shown in table 1.
Online since: October 2010
Authors: Ruben Bartali, V. Micheli, G. Gottardi, I. Luciu, N. Laidani
Hydrogen effect on structure and mechanical properties of ZnO films deposited in Ar/H2 plasma
R.
In the present work the mechanical properties of ZnO thin films, deposited on Si (100) substrates, were studied using the nanoindentation technique.
Aim of the work was the evaluation of the effect of H2 introduction in the plasma phase on the film structure and on its mechanical properties.
The previous results we showed that the presence of hydrogen in the plasma phase represents a key factor for the ZnO synthesis affecting the structural properties.
On the other hand, the coatings deposited in Ar/H2 atmosphere showed similar grain size, while the mechanical properties strongly change.
In the present work the mechanical properties of ZnO thin films, deposited on Si (100) substrates, were studied using the nanoindentation technique.
Aim of the work was the evaluation of the effect of H2 introduction in the plasma phase on the film structure and on its mechanical properties.
The previous results we showed that the presence of hydrogen in the plasma phase represents a key factor for the ZnO synthesis affecting the structural properties.
On the other hand, the coatings deposited in Ar/H2 atmosphere showed similar grain size, while the mechanical properties strongly change.
Online since: September 2011
Authors: Yao Rong Feng, Feng Hu, Hang Wang, He Lin Li, Li Hong Han
Recent researches [5] have pointed out that the fracture toughness is also depended on microstructure factors.
Results Mechanical property.
The mechanical properties of the drill pipe steel were summarized in Table 2, Figure 1 and 2 respectively.
Fig. 7 Particle Number of Three Shape Precipitations in Different Temper Temperature Discussions The relationship between mechanical properties and microstructure is complicated for this new high strength-toughness drill pipe steel.
However, the coarse M3C carbide is an important factor affecting toughness.
Results Mechanical property.
The mechanical properties of the drill pipe steel were summarized in Table 2, Figure 1 and 2 respectively.
Fig. 7 Particle Number of Three Shape Precipitations in Different Temper Temperature Discussions The relationship between mechanical properties and microstructure is complicated for this new high strength-toughness drill pipe steel.
However, the coarse M3C carbide is an important factor affecting toughness.
Online since: April 2017
Authors: Un Hak Hwang
Both the surface temperature of substrates and deposition time were affecting factors.
The Fig. 3 shows also adhesion between layers affects the degree of film hardness for the mold.
Ahmadpourian, Effects of substrate temperature on the properties of sputtered TiN thin films, J.
Major, Biomechanical properties of the thin PVD coatings defined by red blood cells, Bull.
Leng, Structure, mechanical and corrosion properties of TiN films deposited on stainless steel substrates with different inclination angles by DCMS and HPPMS, Surf.
The Fig. 3 shows also adhesion between layers affects the degree of film hardness for the mold.
Ahmadpourian, Effects of substrate temperature on the properties of sputtered TiN thin films, J.
Major, Biomechanical properties of the thin PVD coatings defined by red blood cells, Bull.
Leng, Structure, mechanical and corrosion properties of TiN films deposited on stainless steel substrates with different inclination angles by DCMS and HPPMS, Surf.
Online since: October 2010
Authors: Xiao Ling Wu, Fei Ren
The Construction of the RBF Neural Network Prediction Model on the Cylinder Liner
The determination of the input factors.
Although there are more factors affecting laser surface hardening index in the establishment of the RBF network model, the main impact factors should be used as the parameters of the input layer of RBF network.
Through the analysis, the output factors of the prediction model are the surface hardness (HV) and the hardened depth H (mm) after laser surface hardening of HT150 cylinder liner, and the input factors of the artificial neural network prediction model of laser surface hardening index on the cylinder liner are laser power P, scanning speed V and diameter D.
The neuronal number in the hidden layer is an important factor affecting the performance of RBF network.
Convergence Properties of Radial basis Function.
Although there are more factors affecting laser surface hardening index in the establishment of the RBF network model, the main impact factors should be used as the parameters of the input layer of RBF network.
Through the analysis, the output factors of the prediction model are the surface hardness (HV) and the hardened depth H (mm) after laser surface hardening of HT150 cylinder liner, and the input factors of the artificial neural network prediction model of laser surface hardening index on the cylinder liner are laser power P, scanning speed V and diameter D.
The neuronal number in the hidden layer is an important factor affecting the performance of RBF network.
Convergence Properties of Radial basis Function.
Online since: November 2017
Authors: Nina Djustiana, Arief Cahyanto, Myrna Nurlatifah Zakaria, Sunarso Sunarso, Mitha Amaranila, Nadia Greviana
During cement preparation, precursors play an important role that affects the properties of CO3Ap cement.
Mechanical properties of CO3Ap cement especially its hardness required to be evaluated before it can be applied as bone cement.
Particle size was one of the factors that affect the chemical reaction.
This result was in line with a study on mechanical properties conducted by Erdemir et al., in which the mechanical properties of materials depended on the composition of precursor involved in reactions [15].
Further study on mechanical, physical, and biological properties of CO3Ap bone cement synthesized from Indonesian limestone using this method with precursor ratio of 20:80 is to be conducted in the future.
Mechanical properties of CO3Ap cement especially its hardness required to be evaluated before it can be applied as bone cement.
Particle size was one of the factors that affect the chemical reaction.
This result was in line with a study on mechanical properties conducted by Erdemir et al., in which the mechanical properties of materials depended on the composition of precursor involved in reactions [15].
Further study on mechanical, physical, and biological properties of CO3Ap bone cement synthesized from Indonesian limestone using this method with precursor ratio of 20:80 is to be conducted in the future.
Online since: October 2014
Authors: Marius Catana, Daniela Tarniţă, Dan Tarnita
Introduction
Human knee joint is one of the most complex joints in the human body, taking into account the number of its components, their spatial geometry and their mechanical properties, the contacts between elements and the pressures acting on them.
Knee misalignment is considered one of the biomechanical key factors that influence the progression of knee osteoarthritis [3].
During the progressive stages of the osteoarthritis, the menisci and the cartilage change their structures and their material properties.
Material properties used for knee geometric components are presented in Table 1.
[mm] Healthy 800N 2.41 1.17 2.12 7.17 5.88 6.05 Case OA 800N 4.36 3.95 4.32 3.11 3.35 3.04 Healthy 1500N 4.48 3.67 4.27 9.43 7.06 7.89 Case OA 1500N 7.32 6.98 7.59 5.45 5.89 5.93 Conclusions The biomechanical behavior of human knee cartilages is important in order to understand the OA phenomenon due to mechanical factors, because it could be possible to find solutions to help people to prevent or diminish the OA effects.
Knee misalignment is considered one of the biomechanical key factors that influence the progression of knee osteoarthritis [3].
During the progressive stages of the osteoarthritis, the menisci and the cartilage change their structures and their material properties.
Material properties used for knee geometric components are presented in Table 1.
[mm] Healthy 800N 2.41 1.17 2.12 7.17 5.88 6.05 Case OA 800N 4.36 3.95 4.32 3.11 3.35 3.04 Healthy 1500N 4.48 3.67 4.27 9.43 7.06 7.89 Case OA 1500N 7.32 6.98 7.59 5.45 5.89 5.93 Conclusions The biomechanical behavior of human knee cartilages is important in order to understand the OA phenomenon due to mechanical factors, because it could be possible to find solutions to help people to prevent or diminish the OA effects.
Online since: December 2016
Authors: Jaroslav Pokorný, Zbyšek Pavlík, Milena Pavlíková
Sulphate corrosion phenomenon still belongs to the main mechanism affecting the durability and service life of concrete structures.
Basic physical properties.
Mechanical properties.
Summary of mechanical properties.
Basuoni, Thaumasite sulfate attack on concrete: Mechanisms, influential factors and mitigation, Constr.
Basic physical properties.
Mechanical properties.
Summary of mechanical properties.
Basuoni, Thaumasite sulfate attack on concrete: Mechanisms, influential factors and mitigation, Constr.
Online since: November 2013
Authors: Paul Kah, Markku Pirinen, Raimo Suoranta, Jukka Martikainen
Weld heat input is consequently a critical issue significantly affecting the strength and properties of the joint.
In practice, the cooling rate is dependent on many factors: heat input, process efficiency, material properties preheat temperature, material thickness and wire feeding rate [31-33].
Table 1 Mechanical properties of the weld [39].
This means that the chemistry of the weld and consequently its properties differ from the chemistry and properties of the pure filler metal with its improved mechanical data.
In addition to the important parameters of heat input and filler material, other factors also affect the welding outcome of UHSS welds, for example, preheating, post weld heat treatment (PWHT) and shielding gas.
In practice, the cooling rate is dependent on many factors: heat input, process efficiency, material properties preheat temperature, material thickness and wire feeding rate [31-33].
Table 1 Mechanical properties of the weld [39].
This means that the chemistry of the weld and consequently its properties differ from the chemistry and properties of the pure filler metal with its improved mechanical data.
In addition to the important parameters of heat input and filler material, other factors also affect the welding outcome of UHSS welds, for example, preheating, post weld heat treatment (PWHT) and shielding gas.