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Online since: March 2014
Authors: Wei Yuan Wang, Ping Wang, Yuan Yuan Li
A series of experiments of bending, tensile and shear were conducted to compare the property of different kinds of leaves and discuss the effect of the various factors, such as weight, shape and location [5, 6].
Bionic Model for Thin-walled Stiffened Plate A model is needed to satisfy the difference in mechanical properties between vein and ground cells, and to deduce the growth of the veins perfectly.
Tab. 1 Material parameters of the analysis objects Material Elasticity modulus [MPa] Poisson's ratio Density[kg/m3] 2A12 7x104 0.29 In this paper, ABAQUS finite element software was chosen to analyse the mechanical properties of plate models.
Affected by the first order natural frequency, the first obvious vibration amplitude of VGA stiffened plate emerges in 99Hz, a higher frequency than that of traditional reinforced form or unreinforced form.
(a) Excitation frequency from 20 to 250 HZ (b) Excitation frequency from 250 to 800 HZ Fig.5 Frequency response curves for dynamic analysis Conclusion and discussion Mechanical properties of the stiffened plates, including static behavior and dynamic performance, are related to the distribution form of stiffeners.
Online since: February 2007
Authors: Li Li, Li Hua Gao, Pei Xin Fu, Xing Zhong Guo
The densification and mechanical properties of the ceramics can be ameliorated obviously and the microstructure defects of the ceramics decrease.
Introduction Silicon carbide has been recognised as an important structural ceramic because of its predominant properties.
Properties and microstructure of SiC ceramics.
The sintering properties of final SiC sintered body before and after treatment are shown in Table 3.
The densification and mechanical properties of sintered body can be ameliorated obviously and the microstructure defects of the ceramics decrease.
Online since: February 2013
Authors: He Ming Cheng, Yue Gui, Qing Zhang, Jing Cao
(1) The building deformation caused by excavation with the size of the stiffness of building, ground deformation amount, ground properties etc related.
But when the ground subsidence was larger, shallow water table diving rise, would make the buildings with water for a long time, or in wet environments, thus affecting the use of the buildings [7].
The buildings would be affected for the ground curvature.
The buildings would be affected for the torsion.
It were analyzed that the regularity of the influence of foundation pit excavation on buildings in this paper, it was found the ground foundation subsidence, tilt, curvature, torsion and other factors may lead to building cracks, inclination, or even collapse through the survey.
Online since: June 2013
Authors: Qun Pan, Bin Zhu, Xiao Huang, Lin Liu
Properties of alkali-activated slag cements compounded with soluble glasse with a high silicate modulus Ms=2.6 were detailedly studied in this paper, including compressive strength and flexure strength characterictics at the ages of 3,7,28 days and flow values of fresh cement mixtures on a jolting table.
Many studies [2–6] attest to the high strength characteristic and excellent durability of alkali-activated slag cement, and both these properties are comparable with that of ordinary Portland cement.
Properties of alkali-activated slag cements compounded with soluble glasse (Ms=2.6) were detailedly studied in this paper, including properties: compressive strength and flexure strength characterictics at the ages of 3,7,28 days,also flow values on a jolting table.
A quartz sand with a grading factor (Мg= 2.2) was used as fine aggregate.
Preparation of the test specimens and study of standard characteristics of alkali-activated slag cements under study was carried out with the application of the Chinese standard procedures for determination of cement properties as described in the Chinese standard GB 175-2007 and with the application of special methods, for example, mechanical activation of the cement mortar.
Online since: June 2020
Authors: Abdulwahab Giwa, John Olusoji Owolabi, Abdulkabir Olawale Gidado
Hence, adequate modelling of vertical lift performance is required to predict the pressure drop and subsequently the wellbore pressure because many factors are involved [1].
The production system in an oil or gas field consists of several components where pressure losses may occur, thus affecting the well performance in terms of production rate [4].
It can also be used for analysing how factors such as reservoir pressure, rock properties, fluid properties, well flowing pressure, well geometry, well depth, water cut, restrictions and tubing diameter affect the production rate.
Adjustment factors for the correlation were estimated by comparing the values predicted by the correlation and measured laboratory data that minimized the overall difference.
Table 3: PVT match correlation result Properties Match Correlation Bubble point Standings Solution GOR Standings Oil FVF Standings Oil Viscosity Petrosky et al.
Online since: July 2014
Authors: Ning Li
Because of the lack of knowledge of industrial design greatly affects the efficiency of industrial design corporate design activities.
Industrial design must also consider the social and natural factors , so that the healthy and sustainable development of human society , maintaining harmony between man and nature .
Performance of industrial design From the above analysis of the connotation of industrial design and industrial design features can be seen with the basic properties of creative design , binding , multiple solutions , iterative feedback and so on .
Another designer also take into account various factors existing level of technology and production conditions as well as legal , environmental , ethical , and cultural .
First, because the object is also designed constituted by a variety of factors , any one of the factors that affect the design changes will lead to solving design changes.
Online since: October 2013
Authors: Yin Ping Chen, Hong Xia Wu
This paper puts forward a kind of mechanical measurement method—Heavy hammer-level meter detection based on investigation and research around the Hubei power plant.
The difficulties of ash level measurement Coal ash in the storage has some properties such as light weight, dry, small particle size and low dielectric constant, etc. [5].
These properties result in level measurement of material difficulties are as follows: The dielectric constant of the ash is low, it leads to ultrasound and radar can not form strong reflection.
Coal ash is easily affected by temperature, rain and other external environmental impact [6], medium surface reflection intensity varies because of the environment, it will affect the accuracy of the instrument.
Heavy hammer-level meter is widely used because it is not affected by the dielectric constant, dust concentration, reflective surface and other factors [7].
Online since: January 2014
Authors: Shao Jie Liu, Qian Qian Hu, Pei Xin Li, Xiao Meng Chu
The mechanical properties, construction performance and water resistance of the mortar were improved and costs came down.
The polymer used was PS-HEMA, which achieved better mechanical properties, construction performance and water resistance to the mortar.
The factors and levels were shown in Table 2.
Said, Effect of the addition of an acrylic polymer on the mechanical properties of mortar, ACI Mater.
Benaggoun, Properties of polymer modified mortars made with blended cements, Adv.
Online since: July 2014
Authors: K.K. Ramachandran, N. Murugan, S. Shashi Kumar
Among the various FSW factors, the tool material, tool geometry and FSW equipments are critical in the success of FSW of HMT materials.
Silicon Nitride (Si3N4) has excellent high temperature properties that make it a potential FSW tool material.
The joint strength and other properties are also found affected by the tool wear and type of tool materials.
It is seen that the shape of the tool pin influences the flow of plasticized material and affects weld properties.
Various researchers reported better mechanical properties for FSW joints made with tapered cylindrical (TC) pin profile and higher taper angle is beneficial in producing better plastic flow conditions that are conducive to high strength welds.
Online since: December 2014
Authors: Francisco Pinto Filho, Crislene Rodrigues da Silva Morais, Karla Valéria Miranda de Campos, José Jefferson da Silva Nascimento, Josué da Silva Burit
The process of making metallic biomaterials applied to arthroplasty is quite demanding, therefore, is properly specified by the authorities, citing the composition and properties associated with its application.
Specific technical requirements for prostheses deal on chemical composition, mechanical properties and metallurgical requirements, considering the materials as biocompatible, completely free of any adverse reactions.
Therefore, this study aimed to evaluate the chemical, physical and mechanical properties of metallic biomaterials used for making hip prostheses, to identify possible non-conformities that compromise the durability of the implants.
The factor of resistance to pitting corrosion for this alloy was obtained by replacing the percentages of chromium and molybdenum submitted in Table 1 in Equation 1.
As for the percentage compositions of the elements phosphorus and sulfur in steel, had far superior to steel F 138 values and could jeopardize its corrosion resistance and mechanical properties.
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