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Online since: September 2011
Authors: M.R. Majhi, R. Pyare, S.P. Singh
For a load-bearing application, mechanical properties such as strength, fracture toughness, modulus and hardness are the indispensable factors for lifetime and performance between the implant and the living tissue.
Processing and mechanical properties of hydroxyapatite reinforced with hydroxyapatite whiskers.
Novel bioactive materials with different mechanical properties.
High-strength biofunctional zirconia: mechanical properties and static fatigue behaviour of zirconia-apatite composites.
Advances in biomaterials, Mechanical properties of biomaterials.
Online since: November 2012
Authors: Ze Rong Li, Bi Ru Li, Peng Fei Tian
Packaging Structure Optimization Design based on Low-carbon Packaging Idea Bi Ru Li 1, a, Ze Rong Li 2,b and Peng Fei Tian3,c 123 College of mechanical and electrical engineering, Panzhihua University, Panzhihua 617000,China a libiru0211@qq.com, b843841115@qq.com, cdragontpf@163.com Keywords: Low carbon packaging, Structure optimization, Low carbon logistics, Reduction packaging, Green packaging Abstract.
Each link of transport, storage, stevedoring, carrying, packaging, distribution and recovery during the process of logistics has consumed energy and resource, produced environmental pollution continuously, which has brought about serous negative affect to environment.
The negative affects caused by logistics activities to environment have increased with the development of economic constantly.
The humanized design means that when the scientific structure and rational functions of design are kept, the “humanized” factors will be introduced to design, in order to make person’s physiology and psychology comfortable in the process of using [10].
In terms of technology, green packaging material with low carbon characteristics must be not only meet the 3R1D(Reduce, Reuse, Recycle, Degradable) principle but also have the properties of low carbon in its life cycle [12].
Online since: September 2014
Authors: Chang An Zhu, Jian Xin Zhou, Ming Guo Xie
In the studies of the microstructure and properties, the researchers [12-13] established the relationship of foam material, production process and preparation of the alloy with graphite morphology.
Fig. 5 Typical cooling curve and first derivative curve TE’—Stable (graphite) eutectic equilibrium temperature TE—Metastable (carbide) eutectic equilibrium temperature Tmax—Maximum Temperature of cooling curve TAL—Liquid temperature of austenitic precipitation TES—Temperature of start of eutectic freezing TEU—Lowest eutectic temperature TER—Highest eutectic temperature TEN—Temperature of the end of solidification tL— Interval period of cooling between Tmax and TAL tRE—Interval period of cooling between TALand TES tE—Time of eutectic freezing TE—Eutectic degree of undercooling of grey cast iron, (TE- TEU) The law of cooling features at different solidification stage and corresponding influential factors could be revealed by using thermal analysis method.
Fig. 7 Temperature of primary austenite formation From the analysis of the data, critical temperature of the primary austenite formation had no significantly affected by inoculation condition and casting methods, and is determined by the composition of grey cast iron.
(4) The interval period of eutectic solidification is mainly influence by the wall thickness and slightly affected by types of casting methods and cast iron condition.
American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED, 2000, 255: 79~84 [5] Li Fengjun, Shen Houfa, Liu Baicheng.
Online since: December 2005
Authors: Toshiya Shibayanagi, Masaaki Naka, Masakatsu Maeda, Kazuyuki Tenyama
On the other hand, SiC is a candidate semiconductor for high-power electronic devices owing to its wide band-gap and other intrinsic properties [3].
The bonding temperature affects the interfacial structure.
The frequency factor of the growth rate (k0) and the apparent activation energy for growth (Q) of the TiC/(TiC+Ti2AlC) layers are deduced as 4.3×10-4 m2s-1 and 370 kJmol -1, respectively, while those of the Ti5Si3CX+Ti2AlC layer are 4.8×10 -7 m 2s -1 and 250 kJmol -1, respectively.
Thus, the growth rates of the reaction products are sensitively influenced by the bonding temperature, while the apparent interfacial phase sequence is not affected in the major part but only in the state of the TiAl2.
The values of pre-exponential factor for the growth rate and the apparent activation energy for the growth of the carbide layers are 4.3×10-4 m 2s-1 and 370 kJmol -1, respectively, while those of the Ti5Si3CX layer are 4.8×10-7 m2s -1 and 250 kJmol -1, respectively.
Online since: November 2011
Authors: Shiao Zhao, Shuo Qin, Yan Rong Zhao, Zu Sheng Hu, Bo Lin Wu
Acid resistance is one of the important factors which affect the permeability, fracture conductivity and bearing time of the fracturing proppants, and further affect the productivity of the wells [8-9].
THE CHEMICAL COMPOSITION AND RELATED ROPERTIES OF THE SAMPLES Samples No Chemical composition (wt%) properties Sintering temperature (oC) Al2O3 BaCO3 Bulk density (g/cm3 ) Water bsorption (%) Acid solubility (%) 1 40 60 2.53 7.60 4.86 1600 2 80 20 2.74 2.17 1.35 1600 3 85 15 3.11 1.60 0.84 1600 4 90 10 3.26 1.13 0.52 1600 5 100 0 3.55 0.20 1.47 1600 sintered for 2 h with a heating rate of 5 oC/min and cooled in electrical furnace.
[24] Guohua Chen, Dechao Niu, “Mechanical activation of barium aluminate formation from BaCO3–Al2O3 mixtures,” J.
Online since: March 2007
Authors: R.A. Holt, Wen Jing Li
Holt1,b 1 Mechanical & Materials Engineering, Queen's University, Kingston, ON, Canada, K7L 3N6 a e-mail: liwenjing@me.queensu.ca, b e-mail: holt@me.queensu.ca Keywords: Zirconium, Texture, Anisotropy, Creep Abstract: In this paper we report the stress dependence of the diametral and axial creep rates of cold-worked Zr-2.5Nb tubes with three different combinations of texture and microstructure in biaxial tests at 623K.
It is anisotropic because of the crystallographic texture of pressure tubes and the anisotropic single crystal properties of g-Zr (hcp).
Moreover, the research on the thermal creep provides an easy way to study the factors that may affect the anisotropic deformation and to determine how to model it.
Although grain size is not normally thought to affect dislocation creep, the sub-micron grain sizes of the MPT materials represent a substantial boundary to compete with dislocations as sinks and sources for vacancies.
Online since: November 2012
Authors: Li Bing Liu, Zhi Hong Tan, Zuo Jie Wang, Zheng Jie Wang, Song Zhang, Yang Tan
,Ltd, Tianjing, 300400, China 2School of Environment & Chemical Engineering, NanChang University, Nanchang, Jiangxi, 330031, China 3School of Mechanical Engineering, Hebei University of Technology, Tianjing, 300130, China atjxiaobing@163.com Keywords: digital test, virtual prototype, product design, bag filter, LabVIEW.
Achieve parallel designing and testing, which is full with the zero-cost, zero-lag, zero error of large and complex mechanical equipment design testing.
In recent years, the digital testing methods was widely applying in aerospace field, it simulation analysed the mechanical properties of various honeycomb structure in different loading conditions by FEM software in the literature [2], then analysed of the structure on the overall mechanical properties of the spacecraft.
Many factors affect the dust gas uniformity, our testing project research the effect to dust gas uniformity by filter wind speed and bag-filter permeability, get the best filter wind speed and bag-filter permeability of the bag filter.
Manufacturing and the future of China-The Chinese 2002 Mechanical Engineering Society Annual Meeting Proceedings [M], 2002, In Chinese
Online since: July 2003
Authors: Shu Hong Wang, Wan Cheng Zhu, Kai Zhang, Chun An Tang
Although finite element and boundary element numerical method have been already put into solving intensity factor of fracture mechanics stress, the failure process and characteristic of specimen cannot be simulated [1-5].
Therefore, some mechanical behaviors due to the homogeneousness cannot be investigated in the course of concrete fracture.
Kaiser, who works over mental mechanical behavior in 1950, finds the first acoustic emission application.
The mechanical parameters of the concrete including Elastic modulus27648.9 MPa; Uniaxial compressive strength 33.5 MPa; Tensile strength 2.9 MPa and The mechanical parameters of the mortar including Elastic modulus 25560.0 MPa; Uniaxial compressive strength 47.6 MPa; Tensile strength 3.5 MPa.
The material mechanical parameter is the same as for the main mortar in concrete.
Online since: January 2010
Authors: Terence G. Langdon, Megumi Kawasaki
The results show excellent creep properties with a well-defined region of steady-state flow.
Typically, the as-pressed metals have grain sizes within the submicrometer range and they exhibit superior properties including high strength at ambient temperatures [1] and, if the grains are reasonably stable, excellent superplastic properties at elevated temperatures [2].
To date, only limited information is available on the properties of materials processed by ECAP and tested under creep conditions.
Accordingly, the present investigation was conducted specifically to evaluate the creep properties of high-purity aluminum after processing by ECAP.
Therefore, creep results may be critically evaluated by comparing the measured flow properties with the predictions for the various creep mechanisms.
Online since: December 2010
Authors: Kai Xu, Ji Chao Zhang, Yong Xu
Through the pore water pressure monitoring, hierarchical settlement monitoring, inclinometer and ground surface subsidence, use the conventional soil test, load test, static cone penetration test, Rayleigh wave detection and combined with liquid nitrogen vacuum refrigeration system, SEM micro-structure analysis and computer image processing technology to carry out soft soil micro-structure test, by the dynamic drainage consolidation carried out before and after saturated soil microstructure analysis and evaluation of qualitative and quantitative research methods, showing that the pretreatment of saturated soft foundation has an obvious effect: soft soil consolidation by drainage, the physical and mechanical parameters were significantly enhanced, bearing capacity were increased, deep sand liquefaction improved.
Earthquake engineering research and applications Seismic conceptual design.The key of seismic design is to maintain the functions of the building , ensure the property and personal safety when small earthquakes occur; if rare event occur in the event of earthquake, the building itself can maintain the vertical supports to absorb the seismic energy, and allow cracks occur in concrete and steel yield, to prevent building collapse and protect the safety of human life.
To Structural features of Guangdong Science Center, an integrated consider the importance of structure, importance of develop Long Span Structures to the Guangdong and abroad and the socio-economic factors of Guangdong Science centere such as comprehensive benefits, from the start of seismic performance-based design, put forward the concept of seismic design of complex structure, that is the Guangdong Science Center A, B zone and C, D, F, G four permanent exhibition galleries designed by seismic processing techniques, isolation treatment for the E zone,(Figure 2).
As the shape factor provided by the standard does not specifically consider the building in which the surrounding environment, atmospheric boundary layer, three-dimensional flow of air, therefore calculation according to structure wind loads, in general is conservative bias, in some local is not enough security.
Figure 4 wind tunnel test model Figure 5 Three layers of fireproof map Performance-based fire design research and application Fire district of architectural design.According to the guiding principles of " code for fire protection design of tall buildings "and reference foreign relevant design methods and experience, combined with architectural characteristics, divide the fire protection districts: semi-underground and overhead layers is 5~8.3m, floor-storey is 5m, fire district area index is within the "high regulation" prescribed limits; part of the two-story district-storey is 12m, partition size ranged from 2637.0 to 7034.3m2, the fire district of atrium area is a great space ,has 25028.9m2, the maximum height up to 60 m; three-storey is from 12 to 24m, fire district area ranging from 1308.9 to 5569.2m2 (Figure 5); four-storey, five-storey are subsidiary offices, has a relatively small area, not only separate difficult but also affect the effect of interior space, therefore
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