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The pouring temperature and the stirring power remarkablely affect the morphology and size of primary α-Al in semisolid Al alloy slurry.
Introduction Semisolid processing (SSP) is a relatively new technology that offers distinct advantages over other near-net-shape casting processes, such as a more homogeneous microstructure, less porosity and segregation, and improved mechanical properties [1].
The microstructure of the sample was observed on an optical microscope, and MIAPS image analyzing software was used to measure the average equal-area-circle grain diameter and shape factor of primary α-A1.
Fig.2 is the effect of pouring temperature on average equal-area-circle grain diameter and shape factor of primary α-Al in semisolid A356 under certain stirring power.
In addition, reduction of pouring temperature can obviously improve shape factor of primary α-Al under the condition of certain stirring power as shown in Fig.2b, from 0.63 pouring at 650˚C increasing to 0.84 pouring at 615˚C.

Among these properties are wound healing [5] and anti-bacterial activity [6].
These properties can be controlled in the manufacturing method [9].
In order to produce fiber with desired properties, the optimization was performed by changing the magnitude of the voltage.
The other factor affected the morphology of fibers is flow rate.
Hong, Preparation and properties of electrospun poly(vinyl alcohol)/silver fiber web as wound dressing, Polimer Eng.Sci. (2007) 43-46

Therefore, the objective of this research is to clarify the machinability of iron-based thermal spray coating and the factors resulting in severe tool wear.
The thermophysical properties of the thermal spray coating are shown in Table 1.
This result suggests that the vibration factor affects rapid tool wear during the machining of thermal spray coating.
Conclusions This study has elucidated the machinability of iron-based thermal spray coating for sleeveless engine cylinder, including discussion of factors such as conditions, tool wear, and cutting force.
(4) Thus, the mechanical wear caused by hard particles, thermal shock and also the vibration factor is the primary factor caused wears on the machining of thermal spray coating.

With the unique properties, PCL has high potential in biomedical fields.
What’s more, GO sheets are considered to be the most promising alternative to simultaneously improve the mechanical properties and barrier properties as well as thermal properties [5].
Results and discussion It is well known that the dispersion and morphology of fillers in the polymer matrix are the key factors influencing the physical properties of the polymer matrix.
PCL is a kind of typical semi-crystalline polymers, and the crystallization behavior of PCL significantly influences not only the crystalline structure and morphology but also the resulting mechanical properties.
What’s more the further work on morphology, biodegradability and mechanical properties will be carried out in next plan.

Residual stress distribution on the surface of the workpiece often affect the fatigue strength.
So it is very important to study the distribution of surface residual stress that improve the fatigue property of the workpiece [1-3].
During the cutting, elastic plastic deformation occurs in the conditions of high temperature, high strain and high strain rate, it should be considered that the impact of various factors on the flow stress of the material.
The tissue layer is mainly caused by the mechanical stress elastic deformation.
Journal of Materials Processing Mechanical Technology. 62 (1996) 448~453 [5] S.

Picking-up and clearing parts are the key device of the important work parts for the line chili harvesting machine, which directly affect the performance of the harvesting machine.
As a "red industry" in Xinjiang, and currently or artificial picking harvest, harvest season when busy season, labor is very nervous, and there is a labor intensity and low efficiency, cost is high, which seriously restrict factors chili industrialization process.
The early stage of the material properties of chili and planting mode research: picking on the current chili breadth of planting pattern design; Roller diameter according to chili plant height and mechanical speed; the spiral spring tooth arrangement, spacing according to the properties of material chili fruits and decide that favor picking chili.
Spring tooth use spring steel wire around and become, for spring tooth is rigid, picking on the damage for larger, chili reduce the damage rate, increase mechanical properties, in spring steel wire surface with buffer role of suit rubber.
Reduce the impurity rate, increase mechanical properties.

As using different geometry, load properties and boundary conditions, it can incentive the external prestressing curve beam and mimic activity characteristic.
With the service operation of curved beam structure, to some extent many external factors will caused by the weakening and damage of curved beam structure’s performance.
While using external prestressing technology, the curved beam structure with enhanced mechanical properties will be a very effective reinforcing means [11-12].
Connection anchor of anchorage device is to achieve transfer of the external prestressing .The joint’s subtle change is likely to have an impact on the overall structure properties.
The external prestressing reinforcement process of curved beam will be subjected to a number of factors and limitations.

(2) The material of model structure Model structure material physical and mechanical properties in theory should be consistent with the prototype material according to the similarity ratio requirements[3,4].
The prototype materials should be adopted to make a model under ideal conditions, but the market restrictions, construction conditions and other factors determined that the trial production or purchase close to prototype material performance of the model is used to make model only in the case of possibility.
So the mechanical properties of the prototype material and model material were analyzed through material testing.
The factors causing the difference are: 1.Foam model is used when pouring the scale model, after construction the model is closed so that the foam cannot be moved out, and the modulus of elasticity for foam and concrete is 1.6x106kN/m2 and 3.45x107kN/m2, which would improve the overall stiffness; 2.
Because of the time effect, the data of bridge dynamic response haven’t collected yet under the circumstance that incentive traffic are driving at cracks occurring, however, monitor and identify the dynamic response of entire structure and local sound properties after damage and cracks occur, the principle and procedure are no difference with the initial crack monitoring and recognition under the intact condition while the distinctions between overall dynamic response and local sound properties show before and after cracks occurring, which can lead to the determination of cracks occurring, developing and such damage evolutions.

A hole in the plate affects the vein trajectory.
“Reinforcement percent” is computed as Equation 6 to evaluate the reduction of these properties.
Traditional pattern offer least improvement among several properties.
So venation growing algorithm is a multi-factor-balanced method for rib design.
Venation-like ribs provide comprehensive properties improvement because of full consideration of strain energy and shear stress.

Geometrical parameters of welded joint affect the stress concentration coefficient seriously.
The stress concentration sensitivity of structural materials is primarily determined by their properties, theoretical stress concentration factor, the size of the objects under investigation, loading conditions [2].
There are a lot of factors influencing fatigue strength of welded structures, but stress concentration is the most important one.
The influence factors on stress concentration of welded butt joint This paper focuses on the main factors, including weld toe inclination angle θ and weld edge transition arc radius r.
Stress concentration factors and fatigue behaviour of welded thin walled CHS-SHS T-joints under in-plane bending[J].