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Online since: May 2014
Authors: Zhi Li Feng, Xing Hua Yu, Wei Zhang, Paul Crooker Yu, Stan David, Dong Xiao Qiao
However, the joint usually experience weld metal stress corrosion cracking (SCC), which affects the safety and structural integrity of light water nuclear reactor systems.
The discrepancy is due to the fact that most of investigations ignore or underestimate the thermal recovery in the heat-affect zone or reheated region in the weld.
In this work, a novel experimental testing approach based on thermal-mechanical physical simulation and digital image correlation techniques was developed to quantitatively study the recovery of mechanical property of austenitic stainless steel 304L and Inconel alloy 600 after rapid thermal-mechanical load comparable to thermal cycle in heat affected zone of weld.
Weld Thermo-Mechanical Modeling.
The dynamic strain hardening rule accounts for such a dynamic balance, through the use of the dynamic strain hardening reduction factor to introduce the effect of dislocation annihilation on strain hardening under the conditions relevant to welding thermomechanical cycles.
Online since: February 2014
Authors: Rostislav Drochytka, Jindřich Melichar, Pavel Dohnálek
Introduction Every construction is affected by number of negative factors, which are for example impacts of snow, wind or freeze, but the most significant influence on buildings usually has wetness.
Wetness in masonry used to be manually decreased only by mechanical methods in the past.
Range of the most commonly used building material was chosen in order to determine properties of each hydro-isolating gel.
For testing properties of injection gels and building materials were chosen various laboratory methods in order to thoroughly describe their properties.
[3] ČSN 73 1357: Determination of capillary properties of aerated concrete.
Online since: June 2014
Authors: Qin Zhang, Qiang Li, Jia Tang
Ye Qunfeng[6] of UASB reactor were preliminary numerical simulation of single-phase flow, factors for treatment effects of reaction, the flow characteristics through the simulation of the whole flow field in the reactor, and provide the basis for the optimization design.
The model can be used to describe the change in different regions of the physical properties of each of the UASB reactor.
Sedimentation performance of activated sludge is an important factor influencing the anaerobic reactor design, operation and control, directly affect the reactor solid-liquid separation, thereby affecting the effluent quality reactor.
Were investigated under different influent flow anaerobic reactor velocity field, pressure field and the turbulent properties.
CFD simulation of mechanical draft tube mixing in anaerobic digester tanks[J].Water Research, 2009 (43):1040-1050.
Online since: June 2011
Authors: Yi Dun, Shuan Jie Wang, Xiao Hong Shi, Zhao Ying Zhou
Micro-defects inside metal matrix composite structure seriously influence the mechanic properties of materials and can undermine machine operations.
However due to the special processes in the making of MMCS, minute differences in the processing variables may lead to defects and flaws in the structure, which will do harm to its mechanical performance and integrity.
Presently traditional ultrasonic test is good enough for the testing of complete air debond but is helpless for the mechanical one.
Though both of the coupling quality between the transducer and the specimen and the performance of the transducer may affect the experiment result, this method is more practicable since it is simpler, more convenient and more practical.
As we all know that many factors may affect the results in ultrasonic experiments, such as the couplant and the pressure of the probe.
Online since: March 2011
Authors: Cheng Yong Wang, Yue Xian Song, Ping Ma, L.P. Yang, L.J. Zheng, Y.P. Qu, L.Y. Fu
A PCB is made up of three materials——copper, glass fiber and resin, which have very different material and optical properties.
Ross conducted a Taguchi multi-factorial experiment to identify the influential factors on drill life [39].
Du [51] experimentally discovered that the factors influencing the hole roughness might be different when the drill diameter range from 0.3 mm to 1.0 mm by drilling 6 layer PCBs.
Drilling of printed circuit boards: factors limiting the use of smaller drill sizes.
Critical factors in small-hole drilling.
Online since: October 2011
Authors: Xiao Hong Bai, Yong Kang Lv, Xiao Qiang Dong, Xin En Huang
Contamination can change the physical properties of soil, reduce the strength of cemented soil foundation, and then induce the instability or disruption of buildings.
Contamination from municipal sewage can change the properties of soil, affect the unconfined compression strength of cemented soil, and then induce the instability or disruption of buildings.
“Some factors controlling diffusive transport of potassium ion through clayey soils,” Journal of Southeast University.Vol.22(1), (2006), p.106-111 [2] Mohamed, A.M.O., Said, R.A.
“Development of detection system for subsurface contamination based on electrical properties of soil”.
“Experimental study on mechanical property of cemented soil under environmental contaminations,” Chinese Journal of geotechnical engineering.
Online since: July 2011
Authors: Carsten Siemers, Karel Saksl, Pawel Rokicki, Zdeněk Spotz, Lenka Fusova
Nickel-base superalloys like Alloy 625 are widely used in power generation applications due to their unique properties especially at elevated temperatures.
The cutting speed represents one of the most important factors that have influences on the tool life.
Specific wear features appeared depending on the mechanical and thermal conditions generated in the wear zones.
It affects the quality of the components, tool life and machining costs.
Online since: April 2014
Authors: Hai Xiang Liu, Yan Zhi Xia, Qing Xu Zhang, Ye Qiang Tan, Xue Qin, Ran Ran Zheng, Kun Yan Sui
As well known, carbonaceous materials such as carbon black (CB), multi-walled carbon nanotubes (MWNTS), and graphene oxide (GO) have attracted great interest of researchers over the past decades due to their unique structural and the resultant electrical, optical and mechanical properties[5].
In light of the properties of carbonaceous materials, the low mechanical of SA may be improved by introduction of carbonaceous materials.
In this paper, the rheological properties of SA and three different SA/carbonaceous materials suspensions were studied through applying rotary rheometer MCR301.
The rheological properties of the solutions were measured using an Anton-Paar MCR 301 rheometer with a cone-and-plate fixture.
This indicated that SA solution has been less affected by CB and MWNTs in this concentration.
Online since: June 2012
Authors: Zhe Liu, Feng He Tao, Peng Bo Mou
If there is a certain relationship between any one of the factors and another factor, then and are related or associated.
The Engineering development stage qualitative correlation between the influencing factors.
Maintainability of the factors affecting the relationship has a different scope and intensity.
Maintenance of the expression of the impact of factors associated with the matrix.
On the contrary, it just shows up and disassembly, and other factors, the strength of association is relatively large, the identification mark, and environmental factors and other factors associated with strength, when the score of other factors unchanged, improved two factors will lead to system maintenance has been greatly improved.
Online since: September 2017
Authors: Abdulwahab Giwa, Mufliah Gbemisola Omofoyewa, Lekan Taofeek Popoola
The input factors considered were contact time, temperature and fan speed while the response (output) chosen was the residual moisture content of the seeds.
The results obtained revealed that temperature, contact time and fan speed were affecting the drying of the seeds.
Factors affecting drying include vapour pressure, temperature, relative humidity, air circulation, nature of wet feed, the way it is introduced into the dryer and a host of other environmental factors [9].
For domestic purposes, Moringa oleifera leaf powder has been found to be effective as soap for hand washing when wetted in advance to enable antiseptic and detergent properties from phytochemicals in the leaves [17] to be active.
Also found from the results of this research was that temperature, contact time and fan speed were important parameters affecting drying of moringa seeds.
Showing 15261 to 15270 of 25943 items