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Each fracture are encircled with the other fractures, and sometimes also is cut by other groups fractures, there may also be the more low-level fracture distribution in its vicinity, which will affect the crack-tip stress state and change the crack tip stress intensity factor. 
Each fracture are encircled with the other fractures, and sometimes also is cut by other groups fractures, there may also be the more low-level fracture distribution in its vicinity, which will affect the crack-tip stress state and change the crack tip stress intensity factor. 
However, for a certain position（） near the leading edge of fracture, its size depends entirely on the stress intensity factor KI, KII, and KIII.
The stress intensity factor can be solved to adopt single-point displacement equation.
Conclusions (1) The fracture distribution law is an important factor affecting reasonable selection for waterflooding mode, and only fractures developing direction and the lateral pressure displacement law of fracture are known, can the fracture be utilized effectively, defining reasonable injection pressure to delay the directional water channelling, the time and speed of waterflooding, optimizing injection and production well network, and continuously improving the ultimate recovery efficiency of oil field

The study of the characteristics of the raw materials; mathematical modeling of the experiment; studied physical, mechanical, thermal, deformation properties of wood-slag composite; studied the influence of the method of its manufacture on the basic properties.
During the experiments, all factors varied at three levels – mainly (0), upper (+1) and lower (-1).
This is due to the fact that all its components in their original form have an amorphous phase in their composition, which positively affects the formation of the thermal insulation properties of the composite material.
Along with the strength and durability of the composite has good thermal insulation properties.
It is proved that the new material has improved physical, mechanical, thermal and operational properties in comparison with competing building materials.

Parasitic are one of the most important factors for press pack IGBT.
This raises a number of mechanical and electrical issues.
There are basically two important reasons: first, large voltage spikes will result due to the high di/dt and stray inductance, which can destroy the device; second, the discrepancy of parasitic parameters between paralleled chips lead to unequal current distribution, consequently affecting the performance of the whole device[1,2].
Providing the correct dimensions, material properties (resistivity of conductors and permittivity of insulators) and boundary conditions (the conductors and current paths), the software can extract the structural impedances of any arbitrary geometry.
(b) Mesh Some factors must be considered when extracting the parasitic.

Silicone rubber is excellent special rubber which has fairly stable mechanical properties in a wide temperature range (-50 ˚C to 200 ˚C).
Dynamic mechanical properties of PVMQ/IIR foams In the development of damping materials, the damping capacity is the focus of attention.
The damping properties not only depend on the materials themselves, but also change dramatically with the change of external factors.
There have on sufficient attention to the non-linear characteristics of the damping structure, in particularly the effect of the prestressed, the level of mechanical vibration and other factors on the dynamic characteristics of the damping structure.
The damping properties of the rubber damping materials depend on external factors such as temperature, frequency, strain amplitude (vibration magnitude) and the changes of pre-compression, in addition to the composition and structure of the materials.

The paper describes the principle of innovative welding method known as Delta Spot and evaluates the properties of Delta Spot joints made by combination of galvanized steel sheets H220PD (a0 = 0.9 mm) and TRIP 40/70+Z100MBO (a0 = 0.77 mm).
The properties of Delta Spot joint were compared to the properties of standard resistance spot welds.
Chemical composition and mechanical properties are listed in Table 1 and 2.
The paper evaluated the properties of joints made by new innovative method of resistance spot welding known as Delta Spot.
Part. 1: factors influencing electrode life, Int.

Study on Fractal Elastic Damage Constitutive Law for Concrete Material under Static Load XIE Ming1, a, ZHENG Shansuo1,b 1School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China akpxtx@163.com, bzhengshansuo@263.net Keywords: Concrete material; fractal fracture; elastic damage; multi-fractal; damage constitutive law Abstract: The stochastic properties and discreteness of macroscopic property for concrete appear on mechanical property and fracture surface.
A series of complex fracture phenomena are exhibited, as the process is affected by numerous factors such as stress state, strength of material and original faults.
The phenomena above lead to the irregularity and stochastic properties of crack propagation in fracture surface.
Fig.5 Comparison of W-M curve and experimental stress-strain for concrete stress/Mpa strain×10-6 Fitted curve Statistic curve Variance Summary The stochastik and discreteness of macroscopic performance in concrete are shown as the discreteness of mechanical property and the stochastik of fracture surface.
The same as the stochastic damage constitutive model, the fractal damage constitutive model built in this article can predict the discrete range of stress-strain relation of concrete to reflect the stochastik and discreteness of macroscopic properties reasonably.

The number of factors and their interfaces. 2.
Base metal, weld zone and heat affected zones are analyzed by scanning electron microscope method.
Finding Result We can find out in friction stir welding, the grain structure can be divided into several major zone ü Fine equated crystallites in the nugget at the weld center nugget zone ü Highly elongated grain with very small cells retracting and advancing side thermo mechanical affected zone (TMAZ) and ü Slightly elongated coarse grain in the heat affected zone (HAZ) and base metal (BM) The formation of fine, equiaxed grains and uniformly distributed, very fine strengthening occasions happened in the weld region are the reasons for highly tensile properties of friction stir welding joints.
Mechanical properties of friction stir welded dissimilar aluminium matrix composites.
Prediction of wear and mechanical properties of copper surface composites fabricated using friction stir processing.

Impact line is one of important factors to affect the shape accuracy and surface quality of auto body panel design and manufacture.
The basic mechanical properties of the materials are given in Table 1.
Table 1 Mechanical properties of material code Sheet thickness [mm] Yield strength [MPa] Tensile strength [MPa] Elongation [%] 1# 0.7 195 315 34 2# 0.8 157.2 293.1 53.4 3# 0.7 136.7 299.2 50.7 Results and Analysis Effects of the Draw Bead Arrangement.

The incorporation of particulate reinforcements improves mechanical properties as well as wears resistance of the composites by acting as load-bearing components, while retaining considerably high conductivity [3].
Compared to other carbides, tungsten carbide combines favorable properties such as high hardness, certain plasticity and a good wettability by molten metals.
Surface roughness is an important factor in wear process.
[3] Zhan Y., Zhang G., “The effect of interfacial modifying on the mechanical and wear properties of SiCp/Cu composites”, Materials Letters, 2003; 57, pp. 4583-4591
[7] W.A., Glaeser, “Wear properties of heavy Loaded Cooper-Base Bearing Alloys”, Journal of Metals, 1983, pp.1-6

Since the crude oil contains benzene and other toxic chemical substances, the most typical harm of oil spill pollution is affecting human health.
After the oil is recycled, the physical or chemical property will not be changed.
It has the advantages of low toxicity, not affected by wave and preventing the spread of oil effectively.
In terms of properties, the crude oil of Changqing Oilfield belongs to the high waxy (0.037% of wax quantity) and high viscosity （30 Mpa.s）oil.
Temperature is one of the most important factors which controls the effect of oil dispersant.