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The gradation curve of SMA asphalt mixture directly affect the performance of road.
Comparative analysis of advantages and disadvantages with the properties of the mixture road 9 group grading curve corresponding, can get the recommended gradation curve range.
Because of the different gradation of asphalt mixture formed the different physical and mechanical properties of mixture, a variety of different asphalt mixture has different performance [1, 2].
The coarse aggregate and fine aggregate are two factors of orthogonal experiment respectively.
PhD dissertation, university of changan. 2002 [4] peng yong, li-jun sun;The factors affecting the cleavage strength of asphalt mixture.

In order to analyze the water-absorbent property of silt subgrade, both the rainfall seepage and the capillary phenomenon were simulated in laboratory, which reveals that both factors have distinct effects on the moisture content of compacted silt soil.
Introduction According to investigate results on site, moisture content of embankment varies frequently during service time under the long-term influence of multi-factors, which include rainwater infiltration, capillary water rise and other factors[1-3].
By comparing safety factors of silty subgrade with different height, we can make conclusion that the greater the height is, the worse the stability is.
Subgrade stability analysis of influence factors for rainfall infiltration [J].
Impact casused by density and moisture content of The Yellow River alluvial powder soil on mechanical properties [J].Geotechnical engineering, 2008, 29 (2): 410-414

Mechanical Properties of Barley Straw/HDPE Composites Produced with Extrusion Process Anton M.
Orientation stretching has a significant effect on the physical and mechanical properties of wood-polymer composites.
These factors create significant technological problems in the production of thin-walled products from composite materials.
Table 1 shows that the developed wood-polymer composite is superior to pure polyethylene in terms of physical and mechanical properties.
Yadaw, Evaluation and testing of mechanical properties of wood plastic composite, J.

A new simulation model on frequency is proposed, to analyze mutual relationship between intrinsic frequency and other factors in system.
Simulations show that system vibration frequency is determined by mechanical properties, axial force, inner cutting fluid velocity and density.
(2) The vibration frequency on boring bar, is determined by mechanical properties, and also depends on axial force and inner cutting fluid velocity and fluid density.
Therefore, transverse vibration in boring bar containing inner cutting fluid velocity should be essential factor acting on boring bar
The flow of inner cutting fluid not only affect lateral vibration frequency, but also lead to lose the straight-line stability of the bar.

For anisotropic structures the resultant stress state due to curving are further affected by physical factors.
A further difference is represented by the need to assess the resultant stress state with a view to the secondary stress factors.
The resultant stress state due to curving are further affected by physical factors for anisotropic and heterogeneous structures.
Summary The anisotropy and the heterogenity of mechanical properties caused by short-fibre orientation and distribution in melt flow can influence the macro-mechanical behaviour of injection molded parts.
Sci., 1990, vol. 30, p. 957–96 [2] Gupta K., Wang K.K.: Fiber orientation and mechanical properties of short-fiber-reinforced injection-moulded composites.

Other important factors that affect strength and cost are those ones related to manufacturing processes applied, such as casting, stamping, forging, sintering, machining and bonding of coatings, used in the manufacturing of synchronizer rings.
Comparative analysis of mechanical and physical properties obtained using specimens.
Comparison of typical properties of different choices of material for synchronizer rings
The chosen alloy was FLC 4908 according MPIF Standard 35 because it shows the ability to promote the formation of martensite and bainite during cooling from the sinter temperature and it is the most important factor to optimize the microstructure and therefore the mechanical properties besides lower cost.
As expected, FLC-4908 has shown higher mechanical properties than brass alloy studied.

.), deadwood, characteristic properties, structural timber, physical and mechanical properties.
Introduction The starting mechanism of drying is soil and climatic factors, a sharp decrease in the level of groundwater and meteorological factors, which lead to the weakening not of individual trees, but of pine stands as a whole, that leads to their damage by the apical bark beetle and after - by six-toed bark beetle.
Common rules.”, according to which indicators of physical and mechanical properties of wood were determined according to interstate standards (GOST).
Trudy BHTU [Change of mechanical properties of wood of drying and dry wood of European spruce.
Determination of characteristic values of mechanical properties] (2003).

Factors influencing acousto-ultrasonic approach to impact damage in composite materials Huanping Kong1,a , Zheng Zhang1,b,Lifei Li1,c 1School of Materials Science and Engineering, Beihang University, Beijing 100191, China akhp8706@126.com, bzhangzh@buaa.edu.cn, ctihutihu@163.com Keywords: Acousto-ultrasonic; impact damage; influencing factors; composite Abstract: This paper studied factors influencing AU detection results on different damage specimens, including simulation frequency, transducer modes and transducer location.
The propagation of emitted waves in the materials is affected by the characteristics of microstructure [3].
Reception signal is a rich source of information that carries the integrated imprint of material properties, microstructure and diffuse populations of flaws.
Through statistic analysis on reception signal, we can obtain effective information. 2 Theory and Background 2.1 Stress wave factors The basic approach of AU signal analysis was termed stress wave factor (SWF) analysis.
Mechanical Systems and Signal Processing [9] Z.Q.

By scanning electron microscopy (SEM), single fiber strength tester, the morphologies and mechanical properties of the composite films were researched; the influence of the mass fraction of NCWs on the mechanical property of lignin fibrous film was studied.
The quality of precursor is the key factor affecting the quality of carbon fiber.
This study focused on the research of the effect of NCW content on the microstructure and mechanical property of lignin fibrous film to obtain high quality carbon fiber precursor.
Strips measuring 25 mm × 2.0 mm × 0.53 mm were glued on a paper frame and then mounted on Instron tester and average tensile properties from 10 samples were measured.
a b c d e Fig. 1 SEM images of composite fibrous films with different contents of NCWs (a) 0.0%; (b) 0.3%; (c) 0.5%; (d) 0.8%; (e) 5.0% Mechanical properties.

The tensile strength and hardness of FZ and HAZ were also studied, due to the different properties of the welding and adjacent regions; they affect the mechanical properties of welding.
Studies confirm that the microstructure behavior of welding affects their mechanical properties.
The mismatch in mechanical properties between the base metal, FZ, and HAZ creates strains.
Elfallah, Influence of GMAW factors on the tensile strength of commercial steel, Int.
Bailey, Factors influencing weldability, In N.