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Online since: March 2008
Authors: Yuriy S. Nechaev
The
possibility is considered of nanotechnology applications of the study results for creation of
nanostructured metals with compound-like nanosegregation structures at grain boundaries, in order
to obtain specific physical and mechanical properties of such a cellural-type nanocomposites.
According to [16], these techniques [1-15] can be used for the creation of nanostructured metals with the compound-like nanosegregation at grain boundaries, in order to stabilize the nanostructures and to obtain the specific physical and mechanical properties of such a cellural nanocomposites.
These traps, mainly dislocations, influence the apparent characteristics of hydrogen solubility and diffusivity [17,18]; as a result, even small additions of hydrogen can significantly affect the physical, mechanical and corrosion properties of metals and alloys [19,20].
On the basis of the analysis of the data [27] (in the previous section), one can suppose that in many cases the thermodynamic factors (fH, f⊥H) are close to unity.
The above presented methodology and the results of determination of the characteristics of the hydride-like nanosegregation of hydrogen at dislocations in palladium can be applied for revealing micromechanisms of hydrogen influence on physical and mechanical properties of palladium and palladium-based alloys, and also for optimization of the regimes of thermal-hydrogen treatment and hydrogen-induced hardening ("naklep") of the materials.
According to [16], these techniques [1-15] can be used for the creation of nanostructured metals with the compound-like nanosegregation at grain boundaries, in order to stabilize the nanostructures and to obtain the specific physical and mechanical properties of such a cellural nanocomposites.
These traps, mainly dislocations, influence the apparent characteristics of hydrogen solubility and diffusivity [17,18]; as a result, even small additions of hydrogen can significantly affect the physical, mechanical and corrosion properties of metals and alloys [19,20].
On the basis of the analysis of the data [27] (in the previous section), one can suppose that in many cases the thermodynamic factors (fH, f⊥H) are close to unity.
The above presented methodology and the results of determination of the characteristics of the hydride-like nanosegregation of hydrogen at dislocations in palladium can be applied for revealing micromechanisms of hydrogen influence on physical and mechanical properties of palladium and palladium-based alloys, and also for optimization of the regimes of thermal-hydrogen treatment and hydrogen-induced hardening ("naklep") of the materials.
Online since: May 2023
Authors: Robison Buitrago-Sierra, Angie Tatiana Toro Martinez, Alvaro Guzmán Aponte
Collagen properties.
The properties of collagen depend on different factors such as its structure, self-assembly and functionalities [24].
Mechanical properties.
Functional properties.
Even with smaller fiber sizes, the mechanical properties and hydrophobicity of collagen are increased [13, 32].
The properties of collagen depend on different factors such as its structure, self-assembly and functionalities [24].
Mechanical properties.
Functional properties.
Even with smaller fiber sizes, the mechanical properties and hydrophobicity of collagen are increased [13, 32].
Online since: January 2012
Authors: Yong Sheng Cheng
The main fold is asymmetrical, with a tight north-west limb that was affected by the north-east-trending Longxianggai fault[11].
This formation has high content carbonaceous, which leads to the fragile and the special mechanical properties in some degree.
The mineralization factors and tectonic evolution of Dachang super large tin deposit, Guangxi, China[J].
This formation has high content carbonaceous, which leads to the fragile and the special mechanical properties in some degree.
The mineralization factors and tectonic evolution of Dachang super large tin deposit, Guangxi, China[J].
Online since: October 2011
Authors: Shao Hui Su, You Ping Gong, Guo Jin Chen, Hai Qiang Liu
Research on Technologies of Process Integrated Control for Multidisciplinary Collaborative Design
Liu Haiqiang1,a, Chen Guojin2,b, Su Shaohui3,c, Gong Youping4,d
(1,2,3,4Department of Mechanical Engineering Hangzhou Dianzi University,Hangzhou,Zhejiang Province,China,310018)
aLiuhaiqiang1980@126.com,bchenguojin@163.com,cmesshhui@163.com
Keywords: Multidisciplinary Collaborative Design, Meta-model, Implementation Method, Design Process
Abstract.
However, as multidisciplinary collaborative design is a multi-hierarchy, complicated dynamic control system, process integrated control for multidisciplinary collaborative design has always been influenced by the subsystem-level factors within the various disciplines.
MCD-oriented Integration of Product Design Meta-model (MIDM) Multidisciplinary collaborative design process, the various disciplines of design activities is the link information integration, information integration management objective is to integrate all aspects of information involved can meet the design goals of its own, if the model describes the inconsistency will lead to difficulties in collaboration, to the product of multidisciplinary collaborative design process adversely affect the integrated control [4,5].
Meta-model of the check process including content check, property evaluation, calibration and interface to the effectiveness of the implementation of rules of the inspection and so on, through constant iteration, repeatedly revised, and ultimately improve the meta-model.
Interdisciplinary collaborative design staff design and analysis flow passage refinement, the standard design element model of integrated modeling process, the constraints in the implementation of the rules regulating the level, the overall design parameters of the drum-level object, the object design model, input file object, the output file object and subject object property analysis tools, the description and configuration specific to establish MIDM meta-model, an instance of the different part of the design flow process, knowledge, personnel organization, design data, etc., if change drum of the design process, variable conditions accounting process and the corresponding design parameters, knowledge, personnel, parts model.
However, as multidisciplinary collaborative design is a multi-hierarchy, complicated dynamic control system, process integrated control for multidisciplinary collaborative design has always been influenced by the subsystem-level factors within the various disciplines.
MCD-oriented Integration of Product Design Meta-model (MIDM) Multidisciplinary collaborative design process, the various disciplines of design activities is the link information integration, information integration management objective is to integrate all aspects of information involved can meet the design goals of its own, if the model describes the inconsistency will lead to difficulties in collaboration, to the product of multidisciplinary collaborative design process adversely affect the integrated control [4,5].
Meta-model of the check process including content check, property evaluation, calibration and interface to the effectiveness of the implementation of rules of the inspection and so on, through constant iteration, repeatedly revised, and ultimately improve the meta-model.
Interdisciplinary collaborative design staff design and analysis flow passage refinement, the standard design element model of integrated modeling process, the constraints in the implementation of the rules regulating the level, the overall design parameters of the drum-level object, the object design model, input file object, the output file object and subject object property analysis tools, the description and configuration specific to establish MIDM meta-model, an instance of the different part of the design flow process, knowledge, personnel organization, design data, etc., if change drum of the design process, variable conditions accounting process and the corresponding design parameters, knowledge, personnel, parts model.
Online since: May 2013
Authors: Tomasz Buratowski, Mariusz Giergiel, Krzysztof Kurc, Piotr Małka, Michał Ciszewski
Mechanical structure
Similarly to most of the analyzed robot structures, it was decided to utilize two tracks.
The slip phenomenon is affected by properties of the ground, driving force, type and placement of track treads.
It is possible to determine the relationship between the driving force and factors that influence the slip by: Pn=106b0Lτxdx. (4) where: Pn – driving force b – width of the crawler track L – length of the load-bearing segment of the crawler track τx – shear stresses in the soft ground Assuming that the course of parallel deformations to the ground is linear, it is possible to express these deformations by: Δlx=xsb. (5) where: sb – slip x – distance of the point, for which the slip is calculated from the point of crawler track contact with the ground; the greatest slip appears for x = L.
The slip phenomenon is affected by properties of the ground, driving force, type and placement of track treads.
It is possible to determine the relationship between the driving force and factors that influence the slip by: Pn=106b0Lτxdx. (4) where: Pn – driving force b – width of the crawler track L – length of the load-bearing segment of the crawler track τx – shear stresses in the soft ground Assuming that the course of parallel deformations to the ground is linear, it is possible to express these deformations by: Δlx=xsb. (5) where: sb – slip x – distance of the point, for which the slip is calculated from the point of crawler track contact with the ground; the greatest slip appears for x = L.
Online since: August 2023
Authors: Nesreddine Djafar-Henni, Rachid Chebili
It was concluded that the shear span ratio affects the shear capacity of shear walls.
A value of 0.25 is taken for the zone acceleration factor A.
For the concrete fibers, Mander’s stress-strain diagram is generated using the expected material strength properties (1.3fc) as recommended by LATBDSC [30].
The elastic non-damage stiffness of the material (i.e., elastic modulus) is used to define the mechanical properties at the stage before reaching the failure stress σ't=3.55MPa.
The expected yield stress for the steel material Fe415 is 484 MPa which is the value of yield strength multiplied by a factor of 1.17, as recommended by LATBDSC [30].
A value of 0.25 is taken for the zone acceleration factor A.
For the concrete fibers, Mander’s stress-strain diagram is generated using the expected material strength properties (1.3fc) as recommended by LATBDSC [30].
The elastic non-damage stiffness of the material (i.e., elastic modulus) is used to define the mechanical properties at the stage before reaching the failure stress σ't=3.55MPa.
The expected yield stress for the steel material Fe415 is 484 MPa which is the value of yield strength multiplied by a factor of 1.17, as recommended by LATBDSC [30].
Online since: February 2014
Authors: Xi Rui Lu, Si Jin Su, Meng Jun Chen
In addition, the desired SHS reaction process is eventually affected multiple factors, including the uniformities of the compactness, N2 atmosphere and the reactive agents.
And systematical evaluations are required, including its immobilization performance for other nuclides in the radioactive graphite, and the mechanical, chemical and radiation stability of the waste forms, etc.
Acknowledgements The authors would like to thank financial supports from the National Natural Science Foundation of China (Grant No. 21007052; 41302028; 41272050), the Foundation of Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security (Southwest University of Science and Technology) (Grant No. 11zxnk09) and the Open Foundation of Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP (No. 12zxjk04).
And systematical evaluations are required, including its immobilization performance for other nuclides in the radioactive graphite, and the mechanical, chemical and radiation stability of the waste forms, etc.
Acknowledgements The authors would like to thank financial supports from the National Natural Science Foundation of China (Grant No. 21007052; 41302028; 41272050), the Foundation of Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security (Southwest University of Science and Technology) (Grant No. 11zxnk09) and the Open Foundation of Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion, CAEP (No. 12zxjk04).
Online since: August 2019
Authors: Systi Adi Rachmawati, Alfian Pramudita Putra, Aniek Setiya Budiatin, Dyah Hikmawati
Physicochemical and Cytotoxicity Characterization of Injectable Bone Substitute Based on Hydroxyapatite - Chitosan - Streptomycin for Spinal Tuberculosis Cases
Systi Adi Rachmawati1,2,a Dyah Hikmawati3,b,*, Aniek Setiya Budiatin4,c,
Alfian Pramudita Putra1,d
1Biomedical Engineering Study Program, Department of Physics, Faculty of Science and Technology, Universitas Airlangga, Surabaya, Indonesia
2Material Engineering, Faculty of Mechanical and Aerospace Engineering, Bandung Institute of Technology, Bandung, Indonesia
3Department of Physics, Faculty of Science and Technology, Universitas Airlangga, Surabaya, Indonesia
4Department of Clinical Pharmacy, Faculty of Pharmacy, Universitas Airlangga, Surabaya, Indonesia
asystiara@gmail.com, b*dyah.hikmawati@yahoo.co.id, canieksb@yahoo.co.id, dalfian.pramudita@fst.unair.ac.id
Keywords: chitosan, cytotoxicity, hydroxyapatite, injectable bone substitute, physicochemical, spinal tuberculosis, streptomycin
Abstract.
The fluctuating data may be caused by handling factor of IBS pasta into their injectability.
Pasta injection through the needle based on the driving force that will be applied on bone will affect the setting time [13].
The failure could be reduced by considering the handling factor with some precision tools like extruder.
Ye, Microstructure and properties of alendronate-loaded calcium phosphate cement., Mater.
The fluctuating data may be caused by handling factor of IBS pasta into their injectability.
Pasta injection through the needle based on the driving force that will be applied on bone will affect the setting time [13].
The failure could be reduced by considering the handling factor with some precision tools like extruder.
Ye, Microstructure and properties of alendronate-loaded calcium phosphate cement., Mater.
Online since: September 2013
Authors: Xiao De Guo, Feng Sheng Li, Gui Zhen Bian, Guan Peng Liu
A kind of inorganic materials was coated on the surface of Mg powders by vapor deposition to enhance their water reactivity firstly, and then the organic polymer was coated on the surface to raise their antioxidant property.
Both water reactivity and antioxidant property of Mg powders coated with the double layers were studied in detail.
Because the heating rate is fixed, the relation between hydrogen volume and temperature (V ~ T) can be directly translated into the relationship between hydrogen volume and time (including the temperature factor).
The reaction rate can be increased to a large extent when the addition of Tec is 5wt.%, but the higher addition not only affects integrity and uniformity of coated samples, but also loses the energy of Mg powder.
Mechanical Management and Development, 2006, (1) :7-10[in Chinese] [8] Huo Junping, Song Huaihe, Chen Xiaohong.
Both water reactivity and antioxidant property of Mg powders coated with the double layers were studied in detail.
Because the heating rate is fixed, the relation between hydrogen volume and temperature (V ~ T) can be directly translated into the relationship between hydrogen volume and time (including the temperature factor).
The reaction rate can be increased to a large extent when the addition of Tec is 5wt.%, but the higher addition not only affects integrity and uniformity of coated samples, but also loses the energy of Mg powder.
Mechanical Management and Development, 2006, (1) :7-10[in Chinese] [8] Huo Junping, Song Huaihe, Chen Xiaohong.
Online since: February 2013
Authors: Yong Tian Wang, Guang Yang, Rong Juan Yang, Zong De Liu
Morphology of TiC Reinforced Ni-Cr-Mo Composite Coatings Prepared by CO2 Laser
Guang Yang1, a, Zongde Liu1,b, Yongtian Wang1,c, Rongjuan Yang1,d
1 School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
a yanguang_86@yahoo.com.cn, b lzd@ncepu.edu.cn, c wyt@ncepu.edu.cn,
d yrj-3121@ncepu.edu.cn
Keywords: CO2 laser, ceramic phases, binder composition
Abstract.
The effectiveness of laser welding and fabrication relies greatly on the physical properties of materials.
Besides, increasing TiC volume fraction within the range from 20% to 60% could enlarge TiC particles size but not change the shape [10].However, there is still a lack of explanation for why different TiC morphologies exist, and what else factors could change the shape of TiC is still demanded for composites design.
The uneven bead shape with CO2 laser cladding may not be affected by gas flow but by plasma[1, 15].
The effectiveness of laser welding and fabrication relies greatly on the physical properties of materials.
Besides, increasing TiC volume fraction within the range from 20% to 60% could enlarge TiC particles size but not change the shape [10].However, there is still a lack of explanation for why different TiC morphologies exist, and what else factors could change the shape of TiC is still demanded for composites design.
The uneven bead shape with CO2 laser cladding may not be affected by gas flow but by plasma[1, 15].