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Online since: July 2015
Authors: Kafayat Oluwatoyin Shobowale, Fakhruldin Mohd Hashim, Hilmi bin Hussien
Conventional onshore processing equipment which has been qualified and operational will not be able to withstand the variation of flow of these wells due to the differences in the environmental conditions the equipment’s will operate in as stressed by Husy [4] that thermal requirements are also part of the issues affecting subsea equipment capabilities, thereby requiring equipment’s that are performance driven.
Factors that will influence equipment performance are typically the equipment type and the environment the equipment will be deployed in.
This will reveal a thorough evaluation of the structural integrity of the subsea processing equipment, together with the other environmental factors as stressed by Devegowda and Scott [7] that “The main driver for developing new technology for the subsea processing system is not the seawater environment, but the need to increase the reliability”.
The development of the ontology knowledge model is bases on the creation of classes and subclasses (Figure 3), individuals (Figure 4) and their properties.
Marketset, Mapping factors influencing the selection of subsea petroleum production systems: a case study.
Online since: November 2012
Authors: Xiong Biao Chen, Yu Bao Zhang, Shu Zhen Liu
Motor plays an important role in the dynamic property of the rotary-screw-driven dispensing system.
It is proved that the flow rate in rotary screw dispensing process can be affected by several factors such as the motor speed, applied pressure, flow behavior of the fluid being dispensed, and screw geometry.
The results of real world application of system identification algorithms are always affected by the process and measurement noise associated with the system to be identified and the measurement set-up.
But we got second order system by model selection, analyzing shows that the reason should be the complex property of the fluid which results in the change of the load on the motor.
B., and Ke, H., 2006, “Effects of Fluid Properties on Dispensing Processes for Electronics Packaging,” IEEE Transactions on Electronics Packaging Manufacturing, Vol. 29, No. 2
Online since: December 2012
Authors: Zhen Fu Chen, Jing Yang, Yuan Chu Gan, Qiu Wang Tao
The mechanical properties and fracture properties of heavy concrete adapted from the Kuosheng nuclear power plant in Taiwan have been studied.
The buildup factors of three kinds of doses have been improved for iron contained and barium contained heavy concretes, and the leakage dose distribution outside the hutch sidewall of synchrotron radiation beamline have been discussed.
The physical, mechanical, shielding properties and durability of concrete, produced with silica fume or rice husk ash as supplementary cementing materials, have been investigated.
Results show that concrete mixed with rice husk ash has higher mechanical and physical properties than that mixed without any additives, but lower properties than that is mixed with silica fume [[] K.
Results showed that firing exposure time is inversely proportional to mechanical properties of all types of concrete.
Online since: August 2013
Authors: Chuan Yin Lu, Sheng Zhu
But the effective parameter in the formula refers to the structure of unsaturated soil, stress history, saturation, nature of the problem (the deformation problem or strength problem) and other factors, so it is difficult to determine the parameter values
The properties of different types of unsaturated soil are quite different.
Saix C [16] (2000) introduced the coupling of thermo-mechanical for consolidation of unsaturated clayey silt.
He investigated the coupling by analyzing the influence of temperature to mechanical, verified the influence by thermo-consolidation test and mechanical-consolidation test.
(1) How to investigate the coupling problems with other factors.
Online since: October 2012
Authors: Ze Rong Li, Bi Ru Li, Peng Fei Tian
The efficiency of logistics packaging depends on the selection of logistics equipment, standardization level of operation process, and rationalization packaging and other factors.
Firstly, packaging products have consumed huge resources for production and has not been developed well; secondly, the poor physical and mechanical properties of packaging materials have leaded to waste resources seriously [3].
The Humanized Design of Transport Packaging Transport packaging could load and protect goods, resist the climate condition factors’ encroaching such as temperature, humidity, UV, rain and snow during the storage process, ease the effect of the external force as pressure, vibration, impact, friction, ensure product go through each operation link safely as loading, storage, and carrying in the circulation, increase the load and volume of carrying tools, curtail the operation time and increase the efficiency of operation[4].
It is that goods are put on the shelves efficiently, and at the same time do not affect consumer to purchase.
Moreover, according to the ergonomic principles, you need to standardize the external morphology of packaging container, and consider the elderly requirements as grasping and griping saving labor and not easy to slip away, besides, consider the safe factors of packaging, eliminating the sharp edge of product packaging or container, rounding the corners to reduce the harm caused by packaging for elderly.
Online since: January 2022
Authors: Sulaiman Wafi, Hazem Abuorf
The latter’s properties rely on cohesion and plasticity criteria (Burroughs, 2001; Hall, et al., 2012) to be suitable for construction.
By the contrast, more weighed up factors witnessed in a rammed soil mixture point to workability and the binding issue.
A particular concept concerns dry density (Ciancio et al., 2014; Jaquin et al., 2009), which is affected by many factors; most importantly, compaction, the binding force of the soil minerals, the relative proportions measured between the soil particles and the aggregates (Burroughs, 2001) and, eventually, the water content, not exceeding 11% wet state upon compaction (Bui et al., 2014).
Effect of stabilisation on mechanical properties, moisture buffering and water durability of hypercompacted earth.
Mechanical properties of rammed earth with respect to clay mixture composition.
Online since: December 2018
Authors: Kazunari Fujiyama, Shuhei Higashide, Kazuki Nomoto
The chemical composition and mechanical properties at ambient temperature are shown in Table 1 and Table 2.
Colloidal silica polishing Table 3 shows the creep test conditions and interruption conditions for smooth and notched specimen Table 1 Chemical composition(mass %) C Si Mn P S Cr Mo Ni V Cu N 0.06 0.53 1.45 0.025 0.012 18.38 0.22 10.04 <0.01 0.12 0.029 Table 2 Mechanical properties at ambient temperature 0.2% proof stress(MPa) Tensile strength(MPa) Elongation(%) 253 594 61 Fig. 1 Specimen configurations, observation areas for notched specimen and cutting for observation Table 3 Test conditions and interruption conditions for smooth and notched creep specimen Specimen Test temperature(˚C) Stress (MPa) Time to rupture tr(h) Time fraction t/tr Smooth 650 130 754.6 0.1, 0.219, 0.5, 0.817, 1 Notched 650 130 11518.7 0.1, 0.2, 0.5, 0.8, 1 Results and Discussion EBSD observation.
Phase transformation does not seem to affect the void formation sites apparently.
Void formation does not affect the relationships.
Some of the data coincide with the elastic concentration factor Kt=3.5 which suggests that the significant creep deformation might be restricted due to notch constraint.
Online since: August 2019
Authors: Anil Kumar Bodukuri, Kesha Eswaraiah, V. Pradeep
Hybrid metal matrix composites (HMMC) are advanced materials which are not simply depicting in improvement of mechanical properties but also on characteristics of machinability for thorny shapes to machine.
Introduction The development of mechanical industry is associated with indeed of materials with eminent properties such as superior hardness, high toughness and good impact resistance.
Explore for new, high strength to weight ratio materials with better strength and toughness has guided to the improvement of a new age group of materials, while their properties may generate key challenges in machining operations.
Sivasankar et. al. [2] investigated the particle swarm optimization process for machining of ZrB2-SiC composite and found that the machinability of workpieces increases with increase in volume percentage of SiC till it reaches 25% then it starts decreases, pulse off time of 1 μs & on time of 7 μs is preferred as excellent combination and ANOVA shows that tool & pulse on time are the significant factors.
MRR is predominantly affected by Current then followed by the pulse on time, off time and tool lift. 5.
Online since: June 2014
Authors: Ying Hui Chen, Shuai Wang, Wen Lian Liu
The biosphere, hydrosphere, lithosphere and rock and geological microbial loop and other environment and their interaction problems", mainly is the study of cycles in a different environment (cycle) under the action of the engineering properties of soil and water system.
Effects of human activity to the earth's surface is a subsystem of the system of the universe and its factors are interdependence and mutual restriction between, any part of the changes will affect other parts of the system, but also affected by other parts
Rock and soil mechanics, belongs to the edge of the mechanical discipline, more be model and modeling study of mechanics.
It directly affects the development of the national economy and the people's life.
Once to prevent improper, it will have dire consequences, even endanger people's lives and property safety.
Online since: March 2007
Authors: Hiroyuki Hamada, Yu Qiu Yang, Asami Nakai, Tadashi Uozumi
Introduction Through about 40 years' research, the fiber reinforced plastics (FRPs) are found attractive in the energy absorption field owing to their superior inherent properties for example the strength to weight ratio compared with metal [1-2].
Therefore, the mechanical property in the axial direction was high in the tubes with a small braiding angle.
The constrained central cracks propagation and high axial mechanical property of the 3D braided composite tube with a braiding angle of 18 were considered as the important reasons which led to the increased specific energy absorption in both geometries tubes.
Obviously, the corner geometry affects the energy absorption capability significantly.
It can be inferred that the corner parts are the most important factors which affect the collapse performance of the whole tube and the energy management capacity in the end.
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