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In this paper the failure reason of Q345R Welded Joint was studied through macroscopic observation, chemical properties, metallurgical analysis, scanning electron microscope (SEM) and EDS test method.
The existence of banded structure makes the structure of steel uneven, and affects the properties of steel, forming anisotropy and reducing the plasticity, impact toughness and section shrinkage of steel.
[2] Yan Han et al., Review of Sour Gas Field on Corrosion Factors and Development Progress[C] Advanced Materials Research. 201-203 (2011) 438-447
Research on Mechanical Property and HIC, SSC Test Analysis of L245NS Anti-sulfur Bending Pipe [J].

equivalent viscous damping ratio of the seismic-isolation story； ——horizontal dynamic stiffness of the seismic-isolation story; ——equivalent viscous damping ratio of the j-th isolator unit determined by testing；when damper is set up independently, corresponding damping ratio of the damper shall also be taken into account; ——horizontal dynamic stiffness of the j-th isolator unit determined by testing； ,——representative values of gravity load concentrated at the masses of i-th and j-th respectively； ——gravity load representative value of structure above the seismic-isolation story. 2 Time-history analyzing method The calculation model of the seismic-isolation building structures may adopt the shear type model, the response spectrum characteristics and amount of the input seismic wave shall comply with the provisions in Clause 5.1.2 0f the《code for seismic design of buildings》GB50011-2010; the calculation result should choose the envelope value; the input wave should consider near-field affected
factors. 4.
The mechanical properties and structural sizes are shown in Table 1.
Table1 Lead laminated rubber bearings structure dimensions and mechanical properties model GZY500 preyield shear stiffness/(KN/mm) 11 outside diameter/mm 520 post yield stiffness/(KN/mm) 0.8 effective diameter/mm 500 equivalent damping ratio(100%shear strain) 20% lead core diameter/mm 100 vertical stiffness/(KN/mm) 1800 rubber total thickness/mm 100 vertical design bearing capacity/KN 2500 yield stress/KN 60 maximum displacement/mm 275 4.3 Seismic wave selection when do the time-history analysis, using 3 site-classII seismic wave, they are EL-Centro wave, TangShanEW wave and artificial wave ( Lanzhou wave 1).

In particular, the frictional state between the base material and joint panels significantly affects the internal sliding force and fatigue strength in high tension bolt joints[1],[2].
Table 1 shows the mechanical properties of base materials, joint panels, and high tension bolts.
Table 1 Mechanical properties of materials Material Type Yield strength(MPa) Tensile strength (MPa) Base materials, Joint panels SM 490B 368.3 529.2 High tension bolt F10T 1027.0 1077.0 Methods and levels in surface treatments.
Evaluation of the influence factor on the mechanical characteristics in high tension bolt joints.
Experimental study on the Corrosion Protection Properties and Anticorrosive life of the Zn/Al Metal Spray Method according to the Contents Ratio of Zn and Al.

The beneficial effects of nitrogen on the cyclic properties of most modern alloys have been analyzed in terms of the flow stress components, i.e. the internal and the effective stress.
However, different stainless steel types can also provide a very wide range of mechanical properties and they have the advantage of not needing for surface protection: i.e. storage tanks, vessels, etc.
This newly developed grade of DSS is even more resistant to pitting corrosion, crevice corrosion and stress corrosion cracking, as well as higher mechanical properties.
Hence, the knowledge of the parameters influencing the fatigue properties and thus the fatigue life and the fatigue response must be regarded as important variables for design criteria.
Gunn, Duplex Stainless Steels: Microstructure, properties and applications.

It is of wide application prospect for it possesses virtues of green-friendly, cheap, excellent mechanical properties and durability.
Factors that affect the durability of concrete and their correlations were confirmed in the design guide of concrete durability which compiled by European Committee for Concrete in 1989, and chloride ion was the main factor which occupied 33% of the damage [1].The protective coating of the steel bar is ruined when the concentration of chloride ion reaches a limit beyond which it begins to be rusted when surrounded by oxygen and water.
The best composition was found out by analyzing the influence of each factor according to values of electric flux and compressive strength.
With existence of sodium silicate, bonds of Si-O and Al-O of the major component SiO2 and Al2O3 were broken and rejoined into three-dimensional aluminosilicate gel which properties are analogous to natural zeolite mineral.

The present work assesses the seismic restoration of a primary school in Arcola (Italy) made by a r.c. framework, built in the 60s and affected by high seismic vulnerability.
The steel tubes in a biaxial state of stress, as in the lower part of the columns, involve dissipative properties [3] [4].
It means that they are able to resist a seismic action calculated for a new building with life of 100 years, usage class III, C=1.5, behavior factor q=2.0 (Italian NTC 2008 Structural Norm), associated to concentric bracings with tension and compression diagonals (low ductility class) as in Fig.4.
Mechanical behavior of full unit masonry panels under fire action.

While nanofluid with its higher thermal conductivity and some other upgraded properties compared to conventional fluid rose as appealing research subject especially on fluid and thermal research area.
In order to develop a performer heat pipe, researchers have been investigating the effect of deciding factors like wick, working fluid, and material as well as geometry.
Figure 2 (a) The heat pipe used in this study (b) Experimental setup of this study Result and Discussion The Assessment of CuO-Water Nanofluid The measurement of nanofluid thermal conductivity was done using KD2 Pro Thermal Properties Analyzer Decagon and compared with other studies [11].
The Brownian effect as well as the layer of liquid-solid interface of nano-particle and a more even molecular structure at the interface of solid nano-particle also have role in enhancing the thermal properties of the fluid [12].
The increment of nanofluid’s thermal conductivity being used affects the overall effective thermal conductivity of the heat pipe.

These structural transformations can notably influence the component mechanical properties.
Various factors make that the determination of these critical values (or diagrams) has to be partly experimental: the Cr activity in complex alloys is unknown, the alloying elements greatly affect the properties of the oxide layers as well as the relative stability of the metallic carbides, and the sub-surface alloy composition is time-dependent.
The dissolution of the initial carbides degrades the creep properties of carbidehardened alloys.
The carbon transfers between GCR helium and metallic surfaces can thus be detrimental to the alloy mechanical properties and any carburising or decarburising environment must be avoided.
The alloy performance then relies on the oxide properties.

The place contains the specific behavior of people in this space, cultural events ,memories, and the accumulation of experience.when these factors happened in the space, The space will get some sense,and thus the three-dimensional space becomes a place.
In summary, urban renewal is carrying out in a mechanical and rational Techniques.Although city is neat and tidy, it also lose the spiritual connotation of history.
Designers should strengthen the characteristics of the original factors, protect and respect the original elements.
And then,close relationship will be establish between new venue and original essential factor. pencil.
Simultaneously land is a unique property for farmers, it ignited the farmers a special emotion and value.

Considering the sampling depth, the dry drilling process lack any form of auxiliary radiating, combines with high vacuum lunar surface, poor thermal properties of lunar soil and high solar radiation, all these environments make the drill bit may reach very high temperature [2-4].
The drift of FBG wavelength caused by temperature change can be denoted as , (6) FBG sensor has high precision, and its sensing results are rarely affected by the source energy or the optical path, adapting to the humid climate.
And it also has capability of anti-electromagnetic interference, small size, easy to paste, and hardly impact on mechanical properties.
Conclusions The temperature and its influencing factors in drilling rigid regolith process is a great concern of space engineering, especially in vacuum environment.
The experimental results show that the vacuum environment must be considered as one of the important factors during the study on the drill bit thermal characteristic.