Search results

The influence of the mechanical property of the inclusion and the distance to the crack tip was examined.
From the above, all test specimens are not affected by mode �.
From these results, the stress intensity factors of cracks on the inner side of inclusions are generally greater.
References [1] M.Isida, Stress Intensity Factors of Rotating Disks with Internal Crack at Arbitrary Position ,Transactions of the Japan Society of Mechanical Engineers,47-414,A(1983),229-234
[3] T.Ezumi, and S.Takahashi, Stress Intensity Factors for the Mixed Mode in Rotating Disks (Determination by Photoelastic and Caustics Method), Transactions of the Japan Society of Mechanical Engineers,53-494,A(1987),1946-1952

Effect of Heat Input on Impact Toughness of Coarse-grained Heat-affected Zone of a Nb-Ti Microalloyed Pipeline Steel Zhou Gaoa, Ran Wei and Kaiming Wub International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China agaozhou.wust@163.com, bwukaiming2000@yahoo.com Keywords: coarse-grained heat-affected zone, large heat input welding, impact toughness, martensite/austenite constituent Abstract.
The previous works on the welding parameters revealed that the microstructure in the weld and CGHAZ plays an important role in defining the mechanical properties of welding joints [2].
Besides the microstructure, the microalloying also has much influence on the mechanical properties of base metal, weld metal and heat-affected zone.
There are many factors influencing the formation of acicular ferrite.
It is usually considered that the chemical composition, inclusions and austenite grains size are the main factors.

The mechanical properties such as ultimate tensile strength, yield strength, percentage elongation and hardness have been studied for the hot extruded samples.
The effects of C/TiO2 molar ratio on the reaction processes, activation energies and mechanical properties of the resulting materials were investigated [11].
Hence the present work aims to study the mechanical properties and microstructure of the Al-TiO2 composites after hot extrusion. 2.
Hussami, A study of densification and on factors affecting the density of Nix–Fe100−x nanopowders prepared by mechanical alloying and sintered by spark plasma, Int.
Xie, Reaction pathways, activation energies and mechanical properties of hybrid composites synthesized in-situ from Al-TiO2-C powder mixtures, Mater.

The evaluation results showed that the high toughness sour service pipeline steel with low manganese content had excellent comprehensive properties, and the excellent comprehensive mechanical properties and corrosion resistance properties of trial products achieved through reasonable composition and micro-structure design.
Evaluation Result of X65 Pipeline Steel for Sour Service in TGRI During the past few years, comprehensive analysis on the characters of pipeline steel for sour service is carried out in TGRI, such as the corrosion behavior of pipeline steel for sour service, the main factors affecting corrosion resistant properties of pipeline steel, characterization and test methods of corrosion resistant properties of pipeline steel for sour service, the acceptance criteria of pipeline steel for sour service, etc..
Weldability of the Sour Service Pipeline Steel The weld thermal cycle results in significant changes in microstructure and, consequently, mechanical properties of the weld heat affected zone (HAZ).
Fig. 8 Microhardness of X65MS pipeline steel HAZ Conclusions The excellent comprehensive mechanical properties and corrosion resistance properties of trial products are achieved through reasonable composition and microstructure design.
Ayedi, The effect of time and aging temperature on structural and mechanical properties of pipeline coating.

A Study on the Effect of the Temperature on Mechanical Properties of H90 Copper Strip Sun Fei1,2,a, Xu Cheng1,b * 1School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094 2First Research Institute of the Ministry of Public Security of PRC, Beijing 100048 a13910823492@163.com, bxucheng62@163.com Keywords: High temperature; tests; copper strip; mechanical properties Abstract.
During the movement of bullet in the barrel, the bullet shell always contacts with the rifling of the barrel and bears the effect of high temperature[2,3,4], and the high temperature environment has an effect on the material properties of the H90 copper strip of the bullet shell, and it is still unknown whether the change in material properties affects the movement posture of the bullet out of the muzzle[1].
Therefore, it is needed to understand the mechanical properties of H90 copper strip under different temperatures.
Empirical Models of Effect of Temperature on Mechanical Properties of Material Based on the tests, this paper fitted the yield strength, tensile strength and elastic modulus with temperature of H90 copper strip material and obtained its empirical model
[8] Shuai Cao, Cheng Xu, Experimental on Influence of Temperature on Mechanical Properties of Barrel in Material 30SiMn2MoVA.

Mechanical and tribological properties of composite systems were tested.
When CF was used as the EK reinforced filler, the mechanical properties of EK composites couldn’t be enhanced obviously, and the tribological properties were reduced.
Therefore, CF can’t obviously improve the mechanical properties of CF/EK composites [4].
This becomes a major factor to restrict friction material properties.
When CF content is lower, it can slightly improve the mechanical and tribological properties of composite materials.

Abstract.Glass Fiber Reinforced Plastics composites have an increased application in recent days, due to its enhanced structural properties, Mechanical and thermal properties.
Introduction Glass fiber Reinforced Plastics (GFRP) are widely being used in the automotive, machine tool industry, aerospace components, sporting equipment’s [1] because of their particular mechanical and physical properties such as specific strength and high specific stiffness.
During machining many factors affect the surface finish.
The full factorial design is the most efficient way of conducting the experiment for that three factors and each factor at three levels of experiments is used.
[3] Sonbatry El, Khashaba U.A, Machaly T, Factors affecting the machinability of GFRP/epoxy composites, Comp Structures, 63, pp. 329-338,2004

This paper presents an analytical method to predictions coupled geomechanical effects and change of reservoir parameters, which are all important phenomena affecting heavy oil exploitation.
This is obviously a coupled Thermal-Hydraulic-Mechanical problem.
Meanwhile, local wellbore stress may be highly inhomogeneous because of heat transport processes and rock properties.
Injection strategy optimization is needed to balance these positive and negative factors. 4.1 Temperature and Pore Pressure The change profile of reservoir temperature and fluid viscosity are shown in Fig. 1, with high temperature steam injection, reservoir temperature increase, and fluid viscosity decrease.
The temperature and pressure play a vital role in affecting the stress state in the reservoir. 4.3 Wellbore failure analysis According to rock failure criterions, the change of wellbore stability is shown as fig.5.

Enhancement Mechanical Properties of Polymers Reinforcing by Nano Graphene Karrar A.
Introduction There are many factors affecting the manufacture of industrial, medical and military applications, and the materials manufactured for them may be the basis for this.
Graphene is an important material that improves the mechanical properties, which will be discussed and researched and its effect on the properties.
The addition of nano-graphene material improves mechanical properties clearly.
Zhang, Mechanical Properties of Epoxy and Its Carbon Fiber Composites Modified by Nanoparticles, J.

Many researchers, therefore, discussed the mechanical properties of the composite plating [2-7].
Hojo et al. [8] pointed out that the cleaning process of SiC particles, in which the particles were washed in an acidic solution to remove impurities, affected the particle dispersion into a nickel matrix and thus the mechanical properties.
Their friction properties were also discussed.
The friction and wear properties were evaluated by a ball-on-plate type reciprocating friction tester.
Sugimoto: Factors Affecting the Formation of Electroless Ni-P-SiC Composite Coatings, Journal of the Metal Finishing Society of Japan, Vol. 39 (1988), p. 705