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In this paper the water absorption properties of polyethylene shrink tape were analyzed for long-distance pipeline.
The polyethylene shrink tape has many advantages, such as excellent wear resistance, corrosion resistance, high mechanical strength, anti-aging ability, good resistance to environmental stress resistance, excellent adhesion properties and convenience using.
Hot glue may be a major factor for affecting the water absorption of heat shrinking tape [7].To obtained accurate result, the high-temperature heat shrinkable tapes were chosen for the water absorption tests.
Therefore, hot glue significantly affects the water absorption of heat shrinkable tape.
Li, Impact of hot melt adhesive components of heat shrinkable sleeve on physical property.

The microstructure and hardness of the bead-on-plate welds were analyzed in detail. 2 Experimental 2.1 Base metal and filler metal Q235 steel was used as base metal and its chemical constitution and mechanical property was listed in Table 1 and Table 2 respectively.
So the processing parameters was discovered by orthogonal test method and the processing parameters was listed in Table 3, the orthogonal test factors and levels was listed in Table 4.
Table 4 The orthogonal test factors and levels factors voltage current Welding speed number A B C D 1 1 1 1 1 2 1 2 2 2 3 1 3 3 3 4 2 1 2 3 5 2 2 3 1 6 2 3 1 2 7 3 1 3 2 8 3 2 1 3 9 3 3 2 1 Fig .2 The appearance of the welds 3.2 Hardness measurements For each weld sample, hardness(HV) was measured on the cross section of the weld specimens.
The higher K(——)i was, the more important the i factor was.
The primary and secondary order of the three factors which could affect the microhardness of the welds could be to sort as welding speed, welding voltage and welding current.

One of them is the affect of triple junction drag on grain boundaries motion.
It is established that long-time low temperature pre-annealing reduces the grain growth rate in following high temperature annealing by a factor greater than two.
Ultra-fine (or submicrocrystalline ) materials have outstanding mechanical properties: very often these materials manifest both high strength due to small size of their grains and also high plasticity.
At high temperatures (more than 0.4Tm where Tm is the melting point) ultra-fine grained materials lose their unique mechanical properties due to catastrophic character of grain growth.
In accordance to [5], the main defect affecting GB motion is a triple junction line.

In actual production, the precision of thickness control may be affected because thickness gauge are easy to viscous materials and other impurities.
Affect the accuracy of ultrasonic testing are many factors, mainly thickness accuracy, calibration, probe, coupling agents, surface properties of the measured materials and the environment temperature, especially the porous fiber materials, causing a large number of ultrasonic scattering and attenuation, resulting in There was abnormal readings or no readings (usually the abnormal readings are less than the actual thickness.)
Laser system has been widely used in wood-based panels continuous flat press, but the Panel is not only the entire slab surface, high temperature, dust pollution is serious, the test point arrangement is limited, affecting the accuracy of slab thickness measurement.
Measuring head has two upper and lower rollers rotated freely, the upper roller that is able to move up and down is equipped with mechanical micrometer.
Since the sensor is inaccurate, and is vulnerable by the environmental factors such as noise and human factors, the article adopts the fuzzy comprehensive evaluation and chaos optimization neural network method of automatic acquisition of weight, and chooses membership functions and adaptively adjusts the comprehensive evaluation weight, identifies the mutational errors, the long-term errors and rejects small changes errors.

New groove pass series for long products must be developed by backward engineering starting with the necessary mechanical properties and geometry of the final shape, with a highly iterative manual effort and with numerous manual decisions.
Starting from the final material properties a backward calculation of the cooling line will fix the desired final material properties.
Numerous empirical and physically based model approaches have been published for the calculation of mechanical properties at room temperature for different steel grades [6, 7, 8, 9].
"A Mathematical Model to Predict the Mechanical Properties of Hot Rolled C-Mn and Microalloyed Steels."
Modeling of the Microstructure and Mechanical Properties of Steels during Thermomechanical Processing. 1.

There are many factors which favour the replacement of steel forging with austempered ductile iron [6].
DISCUSSION There has been considerable work carried out to determine the influence of austenitizing and austempering time and temperature on the microstructure and mechanical properties of austempered ductile iron suggest that there is still some degree of uncertainty as to the relationship between the heat treatment parameters and effect of mechanical properties [7-9].
It would be of considerable interest to determine whether the addition of copper and nickel is significant in affecting ductile iron properties.
The results are similar to the research conducted by Cheng-Hsun Hsu et al [10] who studied the mechanical properties of cobalt and nickel alloyed ductile irons.
Aranzabal et al , Influence of Amount and Morphology of Retained Austenite on Mechanical Properties of an Austemperd Ductile iron, Materials Science Technology [J]8 (1992) pp263-273 [9]P.P.

The association of high mechanical properties fiber and laminated timber results in a high performance composite system, on which the reinforcement material is applied to optimize the individual properties of the timber, restoring the element's initial design resistance, or even increasing it.
Table 1 presents the properties of glass, carbon and sisal fibers, for further comparison with Vectran® fiber properties.
Table 2 - Mechanical Properties of Vectran® Filament Yarn [8] Vectran® HT Vectran® UM Break Strength [GPa] 3.2 3.0 Initial Modulus [GPa] 75 103 Elongation at break [%] 3.8 3.8 Table 3 presents other mechanical properties of various engineering materials, permitting the comparison of these properties, in special, the tensile strength.
Figure 2 - Notation and Stress-Strain Relationship on the Cross Section [9] Figure 3 - Failure Modes [9] This design model reduces the calculation of unreinforced glulam beams by using absolute geometrical factors αi and general factors ki [9].
These factors allow to calculate geometrically similar cross sections by calculating αi and ki just once.

Consequently, if the melt bulk modulus can be measured, not only provides the rationale to the comprehensive of polymer melt physical property, but also promote the polymer molding process technology development. 2.
The experiment measuring method of polymer melt bulk modulus 3.1 Material and sample preparation In the polymer molding processing, PP has the widespread application space, as well as it has good chemical stability, high melting point and good mechanical properties [10].
In order to avoid air bubble in melt affecting the measurement accuracy, PP granule has been made into the test sample (φ9×150 mm) by injection molding.
Because the bulk modulus reflects the ability of material resistance deformation, this ability is mainly affected by the chemical bond property and the chemical bond density and the intermolecular acting force, however the free volume affects chemical bond packing density. consequently the free volume causes the bulk modulus changing [14].
Depending on Polymer Free Volume Theory, the influencing factors and the changing rule of polymer melt bulk modulus were explained.

Furthermore, the addition of Hya did not inhibit osteoconductive property of OCP.
The matrix materials may be used not only from the point of view of biological aspects but also holding the physicochemical property of OCP because some of polymer materials should affect the chemical aspect of OCP crystals.
Summary Hya has an effect not only to convert the handling property of OCP from the poor moldability to the injectable characteristics but also raise bone regenerative property of OCP.
[11] E S Desai, M Y Tang, A E Ross, R A Gemeinhart, Critical factors affecting cell encapsulation in superporous hydrogels.
[16] A Matsui, T Anada, T Masuda, Y Honda, N Miyatake, T Kawai, S Kamakura, S Echigo, O Suzuki, Mechanical stress-related calvaria bone augmentation by onlayed octacalcium phosphate-collagen implant, Tissue Eng Part A 16 (2010) 139-151.

The foundation soil condition and the hydrogeological condition are the principal influence factors that result in the cracking problems.
Table 1 Material physical and mechanical parameter table Item Density [KN/m3] Elasticity modulus [MPa] Poisson’s ratio Tensile strength [MPa] Compressive strength [MPa] C35 concrete 23 31500 0.27 1.57 16.7 Expansive soil 19.5 17.5 0.2~0.35 / / Geomorphology.
The physical and mechanical property parameters of each material are listed in Table 1.
The area affected by the groundwater becomes larger and the cracks in these area may develop with the increasing waterhead level.
The simulation of system affected by the three influencing factors together is carried out.