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Online since: July 2011
Authors: Pun Jun Jin, Sheng Sun
Introduction Silicones are a family of polymers which have the extraordinary range of properties.
Select properties of the silicone as follows [7,9]: Strength and stability.
(High water repellency, extremely strong adhesion qualities, microbial resistance, anti-foaming properties, anti-foaming properties) With a low surface tension of 20.4 mN/m, silicone easily wets most surfaces.
The most prominent factors affecting these structures are the environment, pollution, and tourism.
In view of silicone water repellent properties and outstanding aging resistance, silicones are vital to the construction conservation and they are used in waterproofing treatments, mechanical seals, caulking compounds and etc.
Online since: July 2014
Authors: Zhi Neng Tong
Preface Building structure detection mainly refers to the mechanical properties of building structures and components (such as capacity, strength of materials, stress and strain, deformation, vibration, cracking and cracks, etc.) used for testing equipment, so the quality of comprehensive analysis and assessment of building structures .
Should be capable of detecting quality control measures Implementation of total quality management approach, on the quality of the various factors affecting the detection of effective control, mainly developed following the detection of quality control measures: 2.1Have a very clear based on the test.
Special circumstances, can provide users with the testing requirements, if existing standards and norms results in a lack of judgment or the results of a method to determine the method is not clear, the user should provide a clear method to judge the results. 2.2 In strict accordance with national standards or product sampling method specification to ensure a representative sample testing and authenticity. 2.3 Inspectors must be taken seriously testing work to enforce the law, adhere to the principle of all test items provide the same quality of service, and departments affected by the relationship. 2.4 Measuring and testing for the detection of all instruments and equipment according to requirements of the relevant national regulations were certificated and traceable to national benchmarks. 2.5 The testing according to national standards or technical specifications prepared a complete test implementation rules, strictly in accordance with the detection implementing rules and regulations
and the relevant provisions of detection work. 2.6 Various factors affecting the detection process to detect quality control are to develop practical methods to ensure quality testing work. 2.7 When the user disagrees with the test results, a sound approach.
Online since: October 2007
Authors: Bo Zhao, Guo Fu Gao, Yan Wu
At the present, the studies of the nano-composite system mainly focus on the material preparation, mechanical property, toughening mechanism and microstructure, but the high temperature creep properties and superplastic forming are studied on minority system[1-3].
That demonstrates that the two interfaces of Al2O3-ZrO2(n) ceramics prepared by this experiment both have stronger contacts, which are useful for the improvement of mechanical properties.
According to the parameters of mechanical properties[9], when the nano-composite ceramics is effected on external force, the phase transition toughing effectively improves the mechanical properties of the materials.
The study shows that the size of ZrO2 crystal grain is one of the major factors which affect the t-m phase transition.
The improvement of the mechanical properties of Al2O3-ZrO2(n) composite ceramics results from nanometer grains toughening mechanism, ZrO2 phase transition toughing mechanism and intracrystalline structure together.
Online since: February 2012
Authors: Bert Lauwers, Joost R. Duflou, Amar Kumar Behera, Jun Gu
Influence of Material Properties on Accuracy Response Surfaces in Single Point Incremental Forming Amar Kumar Behera1,a, Jun Gu2,b, Bert Lauwers1,c, Joost R.
In this paper, an attempt is made to capture the effect of material properties on the accuracy response surfaces.
The dependence of material properties on formability [1] and process forces in SPIF [2] has been studied in some detail in the past.
Jeswiet et al. mention that accuracy is influenced by several factors such as material springback, stress propagation induced geometric distortion, over-spinning effects, machine tool errors, process parameters such as tool diameter and pitch size and choice of tool path strategies [3].
Micari, Influence of mechanical properties of the sheet material on formability in single point incremental forming, CIRP Annals 53 (1) (2004) 207-210
Online since: October 2021
Authors: Ivan Petrov, Georgy Soloviev, Kureish Khamchiyev, Asylbek Shandaulov, Salima Ibrayeva, Ardak Zhiyengaliyeva, Andrey Ostanin, Kirill Voronin, Alexander Markov
Bone implants are biologically affected by the environment, as well as mechanical functional loads.
Inorganic polymers have physical and chemical resistance, but may have degraded processing characteristics and insufficient mechanical properties.
By its physicochemical, mechanical and biological properties it is almost completely analogous to titanium.
It all depends on the combined method: the porous structure of the implant, its mineral enrichment and the influence of two protein growth factors introduced into the implant.
Mechanical properties of the bone tissue of the human skull // scientific foundations of modern progress.
Online since: July 2021
Authors: Vyacheslav M. Karpov, Artur I. Kurakin, Ilya G. Strukov, Iakov P. Skoblikov, Evgeny I. Efimov
Increasing the frequency of current pulses affected on increasing the specific area of pores.
These properties make this material in demand in the marine and aerospace industries.
X 256) Often these types of defects occur due to poor gas shielding of the welding pool, and factors that destabilize the arc.
Chuang, Effect of heat input on microstructure and mechanical properties of Al-Mg alloys fabricated by WAAM, Applied Surface Science. 486 (2019) 431–440
[6] A.Liu, X.Tang, F.Lu, Study on welding process and properties of AA5754 Al-alloy welded by double pulsed gas metal arc welding, Materials & Design. 50 (2013) 149–155.
Online since: May 2016
Authors: Chuan Zhen Huang, Han Lian Liu, Bin Zou, Jun Wang, Hong Tao Zhu, Kai Tao Xu, Hui Jun Zhou
Firstly, the physical properties of Ti(C7N3)-15(WC+TaC) had been defined.
The mechanical properties of Ti(C7N3)-15(WC+TaC) were shown in Table.1.
Table 1 The mechanical properties and density of hot-pressed sintered Ti(C7N3)-15(WC+TaC) cermet cutting inserts Flexural strength [MPa] Vickers’ hardness HV20[GPa] Fracture toughness [MPa·m1/2] Relative density [%] 1759 18.55 6.07 99.4 Fig.3 Ti(C7N3)-15(WC+TaC) micro tool fabrication process Fig.4 shows the structure of micro hexagonal end mill which made by WEDM.
This edge radius is a determining factor in the effective feed rate and in analysing the cutting mode, i.e. shearing and ploughing.
(a) (b) (c) (d) Fig.4 Tool geometry for 500μm radius milling tool (a) (b) Fig.5 The optical microscope of micro-mill tool Conclusions Micro milling tool is one of the most important aspects affecting the successful applications of micro milling.
Online since: April 2007
Authors: Y.Z. Zhang, L.Y. Sun, Jin Feng Yao, C.D. Xiong, C.Y. Bao, R. Sun, Guo Min Ou
The results indicated that the composite materials could modify the mechanical property of ceramics.
Introduction An ideal bone substitute should include biological and mechanical properties.
However, in BCP/PLA, PDLLA takes the high proportion that enables the improvement of the mechanical properties of composite material, but it seems not to improve the osteoinductivity of the materials.
So it is feasible and prospective to prepare composite materials based on calcium phosphate ceramics in order to improve its mechanical properties and maintain its bioactivity especially osteoinductivity.
Conclusion The composite materials could modify the mechanical property of ceramics.
Online since: January 2013
Authors: Xiang Hong Zhang, Jian Chun Zhang, Han Yang, Xue Qiang Liu
For the same kind of stalks, their mechanical properties may vary tremendously depending on a number of factors, including the grade of maturity, rate of water content, grown sites and etc.
In this study, the separation of hemp bast fiber from the xylem was analyzed, especially for the mechanical properties of the entire stalk and its various components, as well as for their correlations.
As the mechanical properties and geometrical sizes of different hemp stalk individuals are significantly different and the water content indeed affects decortication, the average size and average engineering constants of the testing hemp stalks were selected as the geometric parameters and engineering constants used in the simulation analysis.
[4] Huang Hai-dong, Li Ji-bo and Liao Qing-xi; Mechanical properties and parameters of bottom stalk shearing of ramie at harvest time [J]; Journal of Huazhong Agricultural University; 2008, 27(3): 453-455
[5] Liu Qing-ting, Ou Yin-gang, Qin Shang-le and Wang Wanzhang; Progress of the studies on the mechanical properties of crop straws [J]; Transactions of the Chinese Society for Agricultural Machinery; 2007, 38 (7):172-176
Online since: July 2014
Authors: Chao Run Si, Xian Jie Zhang, Jun Biao Wang
The geomertry and physics property are as fllowing: for GMM rod, the size is Φ40×10mm, relative permeability μr=3~9, and resistivity ρ=9.0×10-7Ω·m; for the excitation coil, turns number n=410, line diameter d=2.4mm, fill-factor n=0.95, ρ=1.67×10-10Ω·m, and μr=1; for the housing, ρ=9.0×10-7Ω·m, μr=2500.
As a result, the two factors should be comprehensively considered during the choice of groove depth h.
The relationship between groove depth and eddy current loss The Effect of Groove Number on Eddy Current Loss The influence of groove size of the eddy current loss has been analyzed above, and the groove number is another factor may affect the eddy current loss in GMM rod.
Considering the factors mentioned above, GMM rod with 4 radial grooves is adopted.
Busbridge, Dynamic magneto-mechanical properties of epoxy-bonded terfenol, Sens.
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