Search results

The materials properties, shown in Table 1, were abstracted from the 1st WWFE.
Depending on the property sought, mechanical properties of the selected materials are determined from extensive experiments, with custom-made specimens and designated tests [2].
The properties of steel pipes widely used in oil and gas industry (grade API 5L X60) was selected in the analysis.
Table 1: Mechanical properties of composite repair [1] Table 2: Mechanical properties of API 5L X60 steel [12] Design Conditions of Repair System Limit analysis are used to determine the acceptable design conditions and to optimize the repair system.
In addition, orientation of the multiple-angle laminates significantly affected the final properties of the repaired riser.

In all computations for the friction clutch model, it has been assumed a homogeneous and isotropic material and all parameters and materials properties are listed in Table 1.
The ratio of inner to outer radius of friction surface (R), which is considered the single most important factor affecting the design parameters and thermal behaviour of friction clutch. 2.
The friction material of clutch should have perfect thermal properties and higher wear resistance for thermal stabilities. 4.
‘Mechanical Design’.
Blok, Fundamental Mechanical Aspects in Boundary Lubrication, SAE Trans., vol. 46, pp. 54–68, 1940

Introduction In metal forming, the plastic flow between the die and tool is affected by the friction factor, the compression load, the tolerance due to die elasticity, the heat conduction between work temperature and room temperature.
It is because the compression test of cylinder is used for determining the friction factor and the mechanical strength of billet material.
Friction calibration curve of for various friction factors ( 0 ::6:3:2 iiddh= ).
Fig. 7 shows the friction calibration curve for various friction factors ( 0 ::6:3:2 iiddh= ).
E., Proceedings of the Institution of Mechanical Engineering, Part B: Journalof Engineering Manufacture, 215(6), 883(2001)

It is clearly evident that the factors influencing cement hydration depends on the continuous availability of surface moisture without evaporation.
From the experimental investigations conducted on different factors for improving the fly ash based concrete has shown significant increase on the pozzolanic reactions, the addition of accelerating admixture on the fly ash based cementitious systems need further investigation to explore the improvement on the early age setting properties, the importance of accelerator curing needs special attention on fly ash based concrete systems.
The effect of accelerated strength gain properties of low and high volume Class F fly ash based concretes with the influence of different curing techniques was found to affect the overall strength gain of concrete systems for different testing periods.
The test results clearly indicate the relative advantage of different parameters such as accelerator dosage and steam curing affect the relative hardening properties of fly ash mixes.
This relationship can be useful to predict the general relationship existing and can be a useful tool to predict the mechanical properties of concrete.

Introduction Duplex stainless steel (DSS) has been widely used in many fields such as petroleum refining, paper manufacturing and ocean industries due to its excellent combination of high mechanical properties, good corrosion resistance under critical working conditions [1-4].
Compared with 2205 commercial DSS, the deformation difference of two phases for 2101 DSS are considerably affected with more Mn and N addition.
Therefore, in order to improve hot working property, it is of great important to research hot deformation behavior with different deformation temperature and strain rate.
Bacroix, Phase transformation and mechanical behavior in annealed 2205 duplex stainless steel welds, Mater.
Yang, The effect of high-temperature exposure on the microstructural stability and toughness property in a 2205 duplex stainless steel, Mater.

Besides the chemical structure of the carbonization precursor and exposure to external shape forming factors (such as the use of matrices and control of carbonization conditions) macromolecular organization of polymers (aggregate formation in solutions, crystalline structure) could also significantly affect the properties and morphology of synthesized carbon [3,4].
It is well established that the crystalline structure and mechanical performance of regenerated cellulose is affected by the chemical composition, time, and temperature used in the hydrolysis of cellulose derivatives [5-7].
Summary In the present work the influence of electrospun cellulose regeneration method and carbonization temperature on the properties of the resulting carbon nanofibers was investigated.
Carbon nanostructured materials with controlled properties synthesized in this project are prospective for use as membranes, adsorbents, thermal insulators and electrodes for fuel cells and supercapacitors.
Changes in electrical and microstructural properties of microcristalline cellulose as function of carbonization temperature, Carbon, 48 (2010), 1012-1024.

The threshold shear strain is a fundamental property of the soil behavior subjected to cyclic loading.
Accordingly, the objectives of this paper are: (1) Construct small-strain dynamic dissipation function for Ramberg-Osgood model based thermodynamic approach; (2) Propose the first threshold shear strain and the second threshold shear strain respectively and explain small-strain dynamic characteristics under different cyclic loading amplitude; (3) Discuss the magnitude of the threshold shear strain and the factors affecting it thoroughly and systematically for many soils; (4) Indicate that the second threshold shear strain presented in this study is consistent with that of pore water increasing and volume changing in the traditional sense by comparison between the threshold shear strain values and shear modulus reduction.
Non-linear yield surface indicates that there exist other influencing factors in addition to friction mechanism.
Yield curves with =5×10-4 Influencing factors of the two threshold shear strains According to the proposed criteria[10], the first and the second threshold shear strain values of four kinds of dam materials are calculated, as listed in Table 2.
Therefore, the coefficient and the exponent of the maximum dynamic shear modulus are main factors, with two threshold shear strains decreasing with increasing coefficient and exponent.

The characteristics of the steel braced frame that overall force and stability are fully utilized, and also the steel properties, such as high strength, high tenacity and high wearing.
Meanwhile, the mechanical properties of steel are continuously improved, leading to the further optimization of the thickness, width and rolling ability of steel products.
e) Steel structure dam makes it feasible to monitor power network and numerous flow factors like flow regime, flow velocity, sediment concentration and water temperature at any time by computer-control system.
The construction can proceed without setting the cofferdam and has no affect on the flow capacity of riverway.
The suggestion of steel structure dam can give full play to the steel’s excellent physical properties and opens up a whole new field for the usage of steel.

Edgar, “Alginate derivatization: A review of chemistry, properties and applications,” Biomaterials, vol.33, no. 11, pp.3279–3305, 2012
Guo, “Preparation and Properties of a Novel Sodium Alginate Microcapsule,” J.
Dai, “Influence of different divalent ions cross-linking sodium alginate-polyacrylamide hydrogels on antibacterial properties and wound healing,” Carbohydr.
Russo, “Synergistic effect of divalent cations in improving technological properties of cross-linked alginate beads,” Int.
Sharma, “Hydrogels for potential food application: Effect of sodium alginate and calcium chloride on physical and morphological properties,” ~ 142 ~ Pharma Innov.

Evaluation model When the system is complex and has many factors, the one level model often appear rough, can not reflect the essence of system.
is the evaluation matrix of, as a part of reflection some properties of .
Evaluation factors set (membership) is determined by the judges scores which 10 people are selected from a group of experts composed of safety experts libraries, evaluate the 56 single factor under evaluation criteria layer to obtain its evaluation that set out in Table 2.
In this paper, fuzzy comprehensive evaluation is used to the various factors affecting the construction safety of bored pile in limestone area by multi-level comprehensive evaluation, the index system reflect the basic fundamentals of safety construction of bored pile construction.
Fuzzy Evaluation on Influence Factors of Chongqing Undergrou- nd Space[J].