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Online since: October 2014
Authors: Irina Besliu, Miroslav Radovanović, Oana Dodun, Margareta Coteaţă, Laurenţiu Slătineanu
Within manufacturing processes, the surface condition is characterized by geometrical aspects and by properties of superficial layers.
The properties of superficial layer analyzed in order to define the surface condition are the microstructure, the microhardness and the superficial residual stresses.
All these characteristics of surface layer could be affected by machining processes applied in order to obtain a certain mechanical part and, one the other hand, they strongly affect the service life of mechanical part.
In fact, the characteristics of the surface layer are properties taken into consideration when the quality of a certain product is evaluated.
In the future, there is the intention to obtain an improved classification of the machining processes on considering their common and distinct properties.
The properties of superficial layer analyzed in order to define the surface condition are the microstructure, the microhardness and the superficial residual stresses.
All these characteristics of surface layer could be affected by machining processes applied in order to obtain a certain mechanical part and, one the other hand, they strongly affect the service life of mechanical part.
In fact, the characteristics of the surface layer are properties taken into consideration when the quality of a certain product is evaluated.
In the future, there is the intention to obtain an improved classification of the machining processes on considering their common and distinct properties.
Online since: January 2013
Authors: Hong Li, Shuai Wu, Qi Yan Li
The mechanical properties and the hydrophobic properties of composite fiber membrane as well as the drug-release curve were characterized.
Mechanical Properties.
The results show that the properties of drug affect the drug capacity in some degree.
Fig. 2 The contact angles of the composite fiber membranes Mechanical Properties.
Consequently, the mechanical properties of the composite fiber membranes reduced.
Mechanical Properties.
The results show that the properties of drug affect the drug capacity in some degree.
Fig. 2 The contact angles of the composite fiber membranes Mechanical Properties.
Consequently, the mechanical properties of the composite fiber membranes reduced.
Finite Element Analysis of Mechanics Property on Memory Alloy Patella Claws with Anti-Shearing Force
Online since: September 2014
Authors: Zhe Wu, Xiao Yan Gong, Cheng Long Yuan, Dong Peng Du, Juan Xing, Xiang Wen Miu
Finite element analysis of mechanics property on memory alloy patella claws with anti-shearing force
Du dong-peng1, Wu zhe2,a, Xing juan1,b, Gong xiao-yan2, Miu xiang-wen3, Yuan cheng-long3
1Department of Orthopaedic Surgery, San Ai Tang Hospital, Lanzhou, 730030, China
2School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi 710054, China
3LanZhou Seemine memory alloy Co., Ltd., Lanzhou, 730030, China
awuzhe7244@126.com, bxingjuan83@163.com
Keywords: anti-shearing force; patella claw; patellar fracture; finite element analysis
Abstract When strong exercise on human being body, respectively, under knees 30°, 60°,90°, using PRO/E5.0 software to establish the transverse patella fracture and anti-shearing force patella claws 3D models, then the two structure models were assembled and imported into ABAQUS10.1 software to establish the finite element model of patellar fracture fixed within patella claw, and analyzed the mechanical performance
We used related softwares to establish the finite model and analyzed mechanical properties.
In the course of human knee flexion, the patella is mainly affected by quadriceps tension F1, patella tendon tension F2 and patellar force FQ.
In short, when in the course of the human body vigorous exercise, knees angle were different, compared with the study result of the reference [6], patella claws deformation was much smaller than the AO tension band, in view of this, the mechanical properties of patella was superior to the AO tension band.
Table 2 Stress parameters of the patella in different knee angel[12] Knee angel 30° 60° 90° Quadriceps tension F1(N) 120.36 116.16 135.09 Patella tendon tension F2(N) 129.77 93.19 54.03 Patellar force FQ(N) FQ2=5G=3675 Patello-femoral joint contact area S(mm2) 450.5 596.26 701.06 Patellar force representing the rate of body weight K 0.086 0.145 0.204 a. knee angel=30° b. knee angel=60° c. knee angel=90° Fig. 4 Contour plot of displacement of patella claw a. knee angel=30° b. knee angel=60° c. knee angel=90° Fig. 5 Contour plot of displacement of the fixed model Conclusions Currently, the finite element method has been widely used in biomedical applications, especially in the study of clinical surgical technique factors on the impact of stress and strain distribution equipment, had its unique advantages[12].
We used related softwares to establish the finite model and analyzed mechanical properties.
In the course of human knee flexion, the patella is mainly affected by quadriceps tension F1, patella tendon tension F2 and patellar force FQ.
In short, when in the course of the human body vigorous exercise, knees angle were different, compared with the study result of the reference [6], patella claws deformation was much smaller than the AO tension band, in view of this, the mechanical properties of patella was superior to the AO tension band.
Table 2 Stress parameters of the patella in different knee angel[12] Knee angel 30° 60° 90° Quadriceps tension F1(N) 120.36 116.16 135.09 Patella tendon tension F2(N) 129.77 93.19 54.03 Patellar force FQ(N) FQ2=5G=3675 Patello-femoral joint contact area S(mm2) 450.5 596.26 701.06 Patellar force representing the rate of body weight K 0.086 0.145 0.204 a. knee angel=30° b. knee angel=60° c. knee angel=90° Fig. 4 Contour plot of displacement of patella claw a. knee angel=30° b. knee angel=60° c. knee angel=90° Fig. 5 Contour plot of displacement of the fixed model Conclusions Currently, the finite element method has been widely used in biomedical applications, especially in the study of clinical surgical technique factors on the impact of stress and strain distribution equipment, had its unique advantages[12].
Online since: April 2017
Authors: Petr Dymáček, Roberto Lacalle, David Andrés, José Alberto Álvarez
The aim of this paper is to analyse the influence of different factors on the Small Punch Creep (SPC) tests.
P22 properties at 873 K.
Consequently, other factors must have played a role in such a behaviour.
Ganesh, Characterisation of Mechanical Properties of Materials Using Innovative Small Specimen Testing Methods, Transactions of the Indian Institute of Metals (2016) 1-17
Blagoeva, Using small punch test data to determine creep strain and strength reduction properties for heat affected zones, Materials Science and Technology 30:1 (2014) 63-66
P22 properties at 873 K.
Consequently, other factors must have played a role in such a behaviour.
Ganesh, Characterisation of Mechanical Properties of Materials Using Innovative Small Specimen Testing Methods, Transactions of the Indian Institute of Metals (2016) 1-17
Blagoeva, Using small punch test data to determine creep strain and strength reduction properties for heat affected zones, Materials Science and Technology 30:1 (2014) 63-66
Online since: April 2008
Authors: Marco Schikorra, A. Erman Tekkaya, Daniel Pietzka
The reinforcement of such aluminum-based profiles with
high-strength materials offers a high potential for weight reduction and an improvement of
functional and mechanical properties.
Due to the wires' specific properties, e.g. high stiffness, their deflection behavior must be analyzed to guarantee a stable feeding-in process.
The main influencing factors are determined and a process window is deduced.
The material properties in fiber direction strongly depend on the fiber quantity in relation to the total volume, the type of the fibers, and the characteristics of the fiber matrix connection and vary accordingly in larger extent [9].
It is possible that small pores remained during the infiltration of the fiber bundle where the liquid matrix material was not able to penetrate and this phenomenon has a negative effect on the material properties of the wire [10].
Due to the wires' specific properties, e.g. high stiffness, their deflection behavior must be analyzed to guarantee a stable feeding-in process.
The main influencing factors are determined and a process window is deduced.
The material properties in fiber direction strongly depend on the fiber quantity in relation to the total volume, the type of the fibers, and the characteristics of the fiber matrix connection and vary accordingly in larger extent [9].
It is possible that small pores remained during the infiltration of the fiber bundle where the liquid matrix material was not able to penetrate and this phenomenon has a negative effect on the material properties of the wire [10].
Online since: May 2012
Authors: An Ping Luo, Xin Yan Wu
Asynchronous phenomenon of the ring truss deployable antenna
Xinyan Wu1,a, Anping Luo2,b
1Zhejiang institute of mechanical & electrical engineering Co.
LTD, China 2Zhejiang Jianyu property management Co.
The deployable structure of the ring truss have advantage properties, which can be used as an effective supporting structure of deployable antenna.
Dynamics theory including constraint equations and considering friction factor are built firstly.
First, the paper set up specialized constrained equations which can reflect the structure geometry and physical features, especially considering the influence of friction factors.
LTD, China 2Zhejiang Jianyu property management Co.
The deployable structure of the ring truss have advantage properties, which can be used as an effective supporting structure of deployable antenna.
Dynamics theory including constraint equations and considering friction factor are built firstly.
First, the paper set up specialized constrained equations which can reflect the structure geometry and physical features, especially considering the influence of friction factors.
Online since: March 2012
Authors: Jun Ling Li, Zhen Song, Yong Kui Wang, Shu Xiang Luo
The solar radiation through the glass of windows and doors is an important factor affecting air conditioning energy consumption in summer.
Studies have shown that: the SHGC values of the glass of doors and windows are constant throughout the whole year, namely the shading properties cannot adjust properly with the seasons, and it is not conducive to building energy efficiency; if the SHGC of glass can adjust properly with the seasons, it can do benefit to building energy efficiency.
Of course, using mechanical shading systems can also solve the above problems, but in architectural design, the shading system may probably affect the building’s facade effects in the application subject to certain restrictions.
For glass itself, if the optical properties of energy saving glass can adjust as solar radiation changing at different times, that method should be a more advanced and reasonable approach.
Study of long-term stable dispersion of nanopowder Many factors can affect the dispersing behavior of nanopowder, such as the surface properties of powders, dispersant characteristics, dispersing equipments, dispersing process, etc.
Studies have shown that: the SHGC values of the glass of doors and windows are constant throughout the whole year, namely the shading properties cannot adjust properly with the seasons, and it is not conducive to building energy efficiency; if the SHGC of glass can adjust properly with the seasons, it can do benefit to building energy efficiency.
Of course, using mechanical shading systems can also solve the above problems, but in architectural design, the shading system may probably affect the building’s facade effects in the application subject to certain restrictions.
For glass itself, if the optical properties of energy saving glass can adjust as solar radiation changing at different times, that method should be a more advanced and reasonable approach.
Study of long-term stable dispersion of nanopowder Many factors can affect the dispersing behavior of nanopowder, such as the surface properties of powders, dispersant characteristics, dispersing equipments, dispersing process, etc.
Online since: September 2013
Authors: Xin Zheng Pu
Material properties: Referred materials of the assembly body of conical pick include carbide tip material YG11, body material 40Cr, handle material 15CrMo, and the Mechanical property parameters of these materials are shown in Tab.1.
Material YG11 have many excellent properties, such as high strength, toughness, abrasion resistant, heatproof and so on.
Material 40Cr have good comprehensive mechanical properties, good toughness of low temperature impact and low notch sensitivity.
Therefore, the finite element method to analyze its structure and mechanical properties.
According to the actual rock properties, three directional forces can be calculated based on Equation.1 and Equation.2., there are cutting force 10.4kN, feed force 5.2kN and side force 4.2kN.
Material YG11 have many excellent properties, such as high strength, toughness, abrasion resistant, heatproof and so on.
Material 40Cr have good comprehensive mechanical properties, good toughness of low temperature impact and low notch sensitivity.
Therefore, the finite element method to analyze its structure and mechanical properties.
According to the actual rock properties, three directional forces can be calculated based on Equation.1 and Equation.2., there are cutting force 10.4kN, feed force 5.2kN and side force 4.2kN.
Online since: November 2011
Authors: Rui Lv, Yu Zhuo Xu, Guo Jing Hou, Yan Chun Li, Pan Zhang
However, due to low molecular weight of asphalt and its wide distribution, mechanical properties, greater sensitivity to temperature, low-temperature brittle, high temperature and easy flowing, almost inflexible,aging resistance poor enough so greatly restricted its application.
Japan as early as the 1970s, on the epoxy asphalt conducted extensive research, Hokkaido University, civil engineering disciplines, study on the preparation of epoxy asphalt, modulus, and stress relaxation properties, destroyed properties were studied.
Asphalt during use, due to a variety of factors, there will be loose, water-stable and frozen stability and a series of durability problems worse.
As the epoxy asphalt cement high degree of integrity of the asphalt mixture is fully guaranteed, can effectively promote the mixture against the adverse effects of environmental factors, has shown good durability characteristics.
Mechanical and performance-related properties of asphalt mixes containing expanded clay aggregate.
Japan as early as the 1970s, on the epoxy asphalt conducted extensive research, Hokkaido University, civil engineering disciplines, study on the preparation of epoxy asphalt, modulus, and stress relaxation properties, destroyed properties were studied.
Asphalt during use, due to a variety of factors, there will be loose, water-stable and frozen stability and a series of durability problems worse.
As the epoxy asphalt cement high degree of integrity of the asphalt mixture is fully guaranteed, can effectively promote the mixture against the adverse effects of environmental factors, has shown good durability characteristics.
Mechanical and performance-related properties of asphalt mixes containing expanded clay aggregate.
Online since: November 2025
Authors: Oleg Kulakov, Albert Katunin, Yevheniia Zarichniak, Ihor Shutenko
To reduce the effects of atmospheric and environmental pollution, algorithms are being used to identify hazardous factors [1], and various methods are being employed to predict the scale of pollution [2, 3].
To enhance properties such as corrosion resistance, mechanical strength, and heat resistance, aluminium conductors in cable products include additives of other metals.
However, titanium can be added in small amounts as an alloying element to enhance the properties of aluminium alloys.
The degree and nature of this change depend on the properties of both the aluminium and the additives.
Minka, Construction of an algorithm for building regions of questionable decisions for devices containing gases in a linear multidimensional space of hazardous factors.
To enhance properties such as corrosion resistance, mechanical strength, and heat resistance, aluminium conductors in cable products include additives of other metals.
However, titanium can be added in small amounts as an alloying element to enhance the properties of aluminium alloys.
The degree and nature of this change depend on the properties of both the aluminium and the additives.
Minka, Construction of an algorithm for building regions of questionable decisions for devices containing gases in a linear multidimensional space of hazardous factors.