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Shrinkage is a natural property of concrete.
One of the factors that could significantly limit the durability of concrete structures, are the effects of atmospheric carbon dioxide (CO2).
Fig. 2 Documentation of concrete surface affected by action of chlorides.
After carbonation, sulfite corrosion that substantially alters the physical and mechanical properties of concrete takes place.
Synergistic effect of acid gases affect pH significantly.

They usually combined macromolecular characteristics such as mechanical integrity and ease of processability, with the electroptic properties of low molarmass.
While chiral side-chain liquid crystals polymers, that is, cholesteric or chiral smectic C phases, have been attracted much interest because of unique properties and potential ferroelectric properties[4-6].
As it is known that copolymers are often combined by different molecular fragments and give rise to different properties in one materials.
In copolymer systems, chiral group and electron donor-acceptor group being introduced simultaneously should bring different properties.
Low Tg values for LCP are significant as the base of further application.The influent factors to Tg are summarized as the property of polymer backbone, the rigidity, sterical hinder and the interaction force between mesogenic and comonomer uint, the flexible spacer length and the content of comonomer.

A Research on the Principle of Thermo- Stress Sizing and its Application for Titanium Alloy Sheet Minghe Chen1, a, Lansheng Xie1,b , Lei Liu2,c 1 College of Mechanical and Mechanical Electrical Engineering, University of Aeronautics & Astronautics, Nanjing, China 210016 2Shanghai Aircraft Manufacturing CO.
The results show quantitatively effects of main factors, such as material property, part geometry, temperature and time for the rule of hot sizing.
They may be used to estimate technological parameters of thermal stress sizing.In addition thermo-mechanical characteristics under standard temperatures of forming or sizing and the experimental curves of thermo-stress sizing for Ti-6Al-4V .
Fig.1 High temperature softening and stress relaxation principle diagram Stress Relaxation Experiments of TC4 Titanium Alloy Sheet To build theory support for making full use of the affects of creep and stress relaxation in designing the continuous casting process, we simulated the conditions of the temperature, strain rate and stress during continuous straightening and did experiments of elevated temperature creep, stress relaxation and elevated tension on Gleeble 3500 thermal-force simulation machine after cleaning the surface of the samples.

Pr-Fe-Al, Nd-Fe-Al, have received much attention because of the rather good physical properties, such as the low-temperature superconducting performance of La-based bulk metallic glasses[1], and the excellent ambient temperature ductility of Ce-based bulk metallic glasses [2].
To date, the magnetic properties, crystallization kinetics and structural changes of Nd-, Pr- and Ce-based BMGs have been studied extensively, however there is little information available on the Sm-based BMGs.
It can be used for the structural materials, non-maskable materials and control material of the atomic reactors [3] for its nuclear properties.
One of the key factors of corrosion resistance is the structural difference [7].
Mechanical properties And corrosion resistance of Fe41Co7Cr15Mo14C15B6Y2 bulk amorphous alloy.

Therefore its surface properties are the key ones.
The structure and chemical properties of the HNT surface are sufficiently studied [19-21] and have a number of characteristic features shown.
The aggregative stability is mainly provided by the adsorptive-solvate, structural-mechanical, and entropic factors.
Its stabilizing effect is mainly connected with the formation of steric hindrances to aggregation due to the adsorptive-solvate as well as structural-mechanical factors of stabilization.
Theng, Interactions of Halloysites with Amides: Mineralogical Factors Affecting Complex Formation, Clay Minerals. 19 (1984) 161-75

In general, SGP is affected by a viscosity of bone fluid, flow rate, interstitial pressure distributions.
Furthermore, it could be one of important factor inducing bone remodeling processes.
The interstitial fluid pressure generation characteristics in bone are functions of its poroelastic properties and boundary conditions.
The mostly important factors Figure 6.
Becker : Generation of electric potentials by bone in response to mechanical stress, Science.

Especially, the icosahedra and medium range order consisted by it are believed to be the key factors controlling the mechanical properties of metallic materials.
The four types of connections, especially the interpenetrating connections of icosahedra (ICOI) which is with five atoms coincide on two icosahedral shells, are found to enhance mechanical properties of metallic glasses [4].
Therefore, investigate the network connectivity among ICOI structure is special important for comprehend the mechanical properties of amorphous materials.
Because, the ICOI is the most stable one and possess the lowest potential energy, and believed to be the most important type of medium range order affecting the mechanical properties of metallic glasses.
These structures are often believed to be the “backbone” of the amorphous, which plays key role in the macro mechanical properties [18].

Further more, it is a very important mechanical index to determine the stiffness of materials [11].
Composite deck boards in terms of their flexural properties are simple beams.
l = L sinα = L sin60° = (5) Methods to increase the stiffness of WPC board Factors that affect the bending deformation of the decking include elastic modulus, the moment of inertia and joist span.
[8] ASTM D 790，Standard Test Methods for Flexural Properties of Unreinforced and Reinforced plastics and Electrical Insulating Materials[ S]
[9] ASTM D 6109，Standard Test Methods for Flexural Properties of Unreinforced and Reinforced plastic Lumber and Related Products[ S]

In linear fracture mechanics, stress intensity factors used to evaluate the crack deformation behavior are calculated by stress distribution around the cracks [3].
The material used here was medium carbon steel S45C (be equal to No.45 steel in China).The chemical composition and mechanical properties are shown in table 1 and table 2 individually.
Table 1 Chemical composition mass% Table 2 Mechanical properties Fig. 1 Specimen with jig to manufacture slant pre-crack Fig. 2 Dimension of specimen with slant angle Residual Stress Measurements.
First, mode Ⅰstress intensity factors, (KⅠ)mes measured from fatigue pre-crack are smaller than KⅠbecause the compressive residual stress exists around it.
Mode Ⅱstress intensity factor (KⅡ)mes was also affected because of the zigzag pattern of the crack surface for the fatigue pre-crack.

Factors influencing the formation and development of deformities.
Main Part Airfield and highway pavements throughout their entire life cycle are constantly exposed to a large number of negative factors that affect their technical condition and, as a consequence, ensure flight and traffic safety [5-9].
Main factors influencing pavement.
The physical and mechanical properties of basalt fiber are given in Table 4.
Physical and mechanical properties of basalt fiber.