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Mechanical Behavior of PLA/HA Composite in Simulated Physiological Environment Siuming Wong 1, Jingshen Wu 2 and Yang Leng 3 Bioengineering Program and Department of Mechanical Engineering, Hong Kong University of Science and Technology, Hong Kong, China 1 siuming@ust.hk, 2mejswu@ust.hk, 3meleng@ust.hk Keywords: Polylactic acid; hydroxyapatite; in vitro; mechanical properties; degradation.
Effects of bio-degradation on the mechanical properties of polylactic acid (PLA)/hydroxyapatite (HA) were evaluated using a newly designed three-point bending fixture in SBF chamber.
The results would be better to reflect the properties of the material when it is imbedded in human body.
It suggests that traditional mechanical tests could overestimate the retention time of bending properties of PLA/HA composites.
The findings of the present work suggests that the body temperature and body fluid affect the results of mechanical testing significantly and the data obtained at room temperature in air could not reflect the actual mechanical strength of the biomaterial in human body condition.

Both the chemical composition and the main mechanical properties of this alloy are fully available in literature [21] and are not reported here for the sake of brevity.
The control factors were selected accordingly to the above mentioned considerations.
Table 2 summarizes the levels of control factors and their settings.
However, it is affected by all the control factors, furthermore, its value mainly depends on the changes of down kerf
Squillace, Effect of welding parameters on mechanical and microstructural properties of dissimilar AA6082-AA2024 joints produced by friction stir welding, Materials and Design, V. 30/3 (2009), 609-616

Study on Shallow Embedded Column Foot of Reactive Powder Concrete Pole Mechanical Properties Yuzhuo Jia1,a, Jinlong Xu2,b* 1School of Architecture, Northeast Dianli University, Jilin 132012, China 2School of Architecture, Northeast Dianli University, Jilin 132012, China b*1126005268@qq.com Keywords: shallow embedded column foot ; transmission line ;poles ;reactive powder concrete Abstract.
The results show that shallow embedded column foot has good mechanical properties.
As an important connection between the main body and base, the column foot is the dominant factor to determine the pole’s stability bearing capacity, and play an important role in the whole structure.
For the shallow embedded column foot can be better applied in practical engineering, So it is necessary to study the mechanical properties of shallow embedded column foot base etc, In order to provide some useful help and advice for the design and calculation of the structure of column base. 1. 500kV Pole Project Profile Wire is four splits LGJ-400/35 ACSR ,using GJ-150 two lightning conductor, horizontal span is 420 meters, vertical span is 550 meters ,The maximum wind speed is 30m/s , maximum temperature is +40℃, minimum temperature is -10℃ ,design ice thickness is 10mm.
In order to force transmission performance for further investigation of anchor bolts and the possible influencing factors, Here are the basis of stress change in the adjacent section, also the stress anchor undertake between adjacent section.

Introduction Maximum entropy principle is probability distribution of some actual analysis estimated objective physical system, the solution in maximum entropy is an objective ammbinount, it is not intended to subjective factors[1], and entropy method based on the maximum entropy is an objective evaluation method, in which the weighted value of evaluation index[2].
In order to remedy the deficiency in the conventional forecasting methods, This paper analyzes its factors affecting and the site observation data, New Method in Prediction of height of water conducted fissure zone by hierarchical analysis and neural network method, to predicted the height of water conducted fissure zone on the nose.
Tab.1 Parameter for height prediction of water fractured zone in work face roof Working face Geological condition Mechanical properties of rock mass Exploiting activity Height Depth Obliqity Mudstone ratio Pressive strength/pa Coal thickness/m Dip length goaf/m N1S1 458.9 7.5 24.67 170 12.42 227 205.9 N1N2 516.3 8 18.48 191 7.54 195 185.1 N1N4 458 7.5 13.14 175 11.4 207 211.2 N1S2 433.91 8 13.01 198.5 15.17 227 234 S2S7 784 6 20.45 187 10.95 230 219 XK S2S7 590 6.5 31.17 187 9.97 230 199 S2S9 717.7 8 12.8 213 9 277 Determination of Predictive Index Height of the Water Conducted Zone Index System Evaluation Model Based on Entropy Weight Method.
Tab. 3 Evaluation index weight prediction results Influence factor x1 x2 x3 x4 x5 x6 Predicted value/m Entropy weight 0.1739 0.1206 0.1733 0.1173 0.1794 0.2355 217.33 AHP weight 0.1007 0.0769 0.1145 0.1049 0.2410 0.3620 197.16 Average value 0.1373 0.09875 0.1439 0.1111 0.2102 0.29875 207.25 l The dominant influence was the exploration conditions, particularly incline length of coal face. the calculated results show that the influence of incline length of coal face is sensible,coal thickness is one of the main factors affecting it,the results are consistent with the theory.
l To a certain extent ,to be affected by mechanical properties of rock mass, The results are at great variance with theory, Geological environment conditions has little influence on it.

The experimental results showed that more accurate prediction on nugget size and mechanical properties of spot welds can be obtained by the models optimized.
The nugget geometry, which relates to the effective area to load, has an intimate relationship with mechanical properties [6].
Here, the index of tensile shear strength (Ft) was introduced to describe the mechanical properties of spot weld.
These effects are also disadvantageous to the quality of RSW because of the decreasing of effective area to load and mechanical properties of spot welds.
Then, the mechanical property of spot welds decreases with these effects.

Effect of Annealing Temperature on Mechanical Properties of Cold Drawn Pearlitic Steel Wires Won Jong Nam 1,a, Hyung Rak Song1 and Kyung Tae Park 2,b 1 Department of Advanced Materials Engineering, Kookmin University, Seoul, Korea 2 Department of Materials Science and Engineering, Hanbat University, Daejeon, Korea awjnam@kookmin.ac.kr, b ktpark@hanbat.ac.kr Keywords: annealing, wire drawing, pearlite, cementite, steel Abstract.
The effects of annealing temperature and annealing time on mechanical properties of cold drawn pearlitic steel wires containing 0.84wt% of silicon were investigated.
In this work, it is attempted to investigate the effects of annealing temperature and annealing time on mechanical properties in cold drawn high carbon steel wires containing 0.84wt%Si.
Thus, the strain age hardening and the age softening are main factors to control tensile strength of annealed steel wires.
Summary The effects of annealing temperature and annealing time on mechanical properties of cold drawn pearlitic steel wires containing 0.84wt% of silicon were investigated.

The random noise is an important factor that affects the precision of the MEMS gyroscope.
Besides, given the complexity of the actual system, the statistical properties of the system interference noise and observation noise are difficult to access.
Because of the time variability and random properties of the actual situation, the statistical properties of the noise are unknown and time-varying.
Where:,is the forgotten factor with the generally range 0.95 to 0.99.
To simplify the computation without affecting the drift coefficient estimation accuracy, we can assume that r=0, q=0.As the measurement noise variance matrix R have the most obvious impact on the filter.

Effect of PTFE Content on Microstructure and Tribological Properties of Cu-Sn Coating Li-xia YING1,a,*, Xiao-Hui WANG2,b, Chun-Jie ZHANG3,c, Guan-Nan LIU4,d, Gui-Xiang WANG5,e 1,2,3College of Mechanical and Electrical, Harbin Engineering University, Harbin, Heilongjiang, China 4College of Mechanical and Electrical, Harbin Institute of Technology, Harbin, Heilongjiang, China 5College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, Heilongjiang, China ayinglixia@hrbeu.edu.cn, b1145025320@qq.com, c1542039782@qq.com, d446765333@qq.com, ewgx0357@126.com *Corresponding author Keywords: Electrodeposition, Cu-Sn, PTFE, Tribological properties.
On the other hand, it is difficult to exert excellent antiwear and antifriction comprehensive properties under dry friction condition.
As excellent lubricant particles, PTFE has many unique properties, such as great chemical stability, low friction coefficient (0.01~0.1) and excellent self-lubricating properties and hence received much attention [6,7].
In general, the amount of particles in the plating bath is the main factor affecting the content of the particles in the coating.
[10] Zhirong Huang, Panyu Li, Effect of process parameters during preparating Cu-Sn-PTFE self-lubricant composite coating by electrodeposition method on its properties, Materials for Mechanical Engineering. 11 (2011) 78-81.

According to the to identify the causes of the defects, in order to find ways to solve these problems, production processes were reasonably optimized .Under the seal ring of the injection molding process, raw material preparation, injection molding and post-processing work pieces in three stages, combined with the affecting factors in producing the ring.
Table 2 Post-treatment processing conditions of the thermoplastic for the sealing ring Plastic varieties Heating temperature／˚C Holding time／h PA1010 90～100 4～10 PA6 110～130 2～8 PA66 70～80 2～4 PP 75～85 2～4 Influence factors of sealing performance Performance of injection molded parts is influenced by many factors.
The choice and control of the injection molding process technology conditions became the key factors.
It is the important factors related to the quality of parts.
Screw speed is also important parameter affecting plasticizing ability and plasticizing effect.

Structure, mechanical properties, thermal stability and antibacterial properties were investigated.
The blend films possess good mechanical properties and thermal stability, and the existence of chitosan endows blend films with antimicrobial property.
Mechanical Properties.
XRD spectra of blend films with different ratios (cellulose:chitosan) Mechanical Properties.
And the blend films showed good mechanical properties and thermal stability, retaining excellent antimicrobial properties of chitosan.