Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: March 2015
Authors: Li Li Tong, Hui Qi, Mahmoud Helal, Fathallah Elsayed
Further investigations have been performed to study the effect of including material damping and the rate-dependant material properties at different shock loads.
The results indicate that stiffener configurations and shock loads affect greatly the overall performance of steel plates and sensitive to the material data.
As shown in Fig. 3a, at shock factor equal to 0.2 the maximum displacement for model 1 is 99.69 mm.
So, it can be concluded that the damping properties plays a very important role in the response prediction due to underwater shock load.
The effect of stiffener configurations is very important, since it can affect drastically the overall behavior of the plates as indicated.
Online since: August 2025
Authors: Marwa M. EL-Tyieb, Adel M.A. Elhdad, Hussein M. Ahmed, Safaa M. Ragheeb
The data correlated with TEM findings, validating the nanoscale properties of the Al-NPs.
Their efficiency was analyzed based on their properties and morphology.
The Langmuir isotherm model implies that physical factors drive monolayer sorption.
The shape and size of nanoparticles significantly influence their properties.
It is particularly important because it impacts the solid-solution interface and the active sites of the adsorbent, affecting the efficiency of COD removal.
Online since: January 2013
Authors: Guang Ming Xu, Ke Ming Liu, Lian Yong Zhang, Na Wang
China 2School of Mechanical Engineering, Liaoning Technical University, Fuxin, P.R.
Therefore, based on the stress variation analysis on the impeller, the influence factors of impeller stress are analyzed and the structure optimization of the impeller is done by using the finite element method in the paper.
Set the properties of materials are initialized as follows: material elastic modulus is 200Gpa, Poisson's ratio is 0.3; density is 7850Kg/m3.
Due to the centrifugal force, the air exciting vibration force and other factors’ (such as sealing, rotor’s instability) interaction, there will be some vibration on impeller.
Considering the computation of the factors, only 3mm, 5mm, 8mm, 9mm and 10mm on the maximum stress in the edge fillet radius is simulated, which is shown in Fig7~Fig.12.
Online since: December 2013
Authors: Yudy Surya Irawan, Rudy Soenoko, Eko Marsyahyo, Heru Suryanto
The crystalline structure of cellulose affects the physical and mechanical properties of the cellulose fibers.
Increasing the ratio of crystalline to amorphous regions in a cellulose structure affects the accessibility of cellulose molecules increases the rigidity, dimensional stability and density of cellulose while but properties such as the elasticity chemical reactivity and swelling of polymeric substances decrease [4,5].
This process implies the subjection of a fiber to an interaction with a fairly concentrated aqueous solution of a strong base to produce swelling, with resultant changes in structure, dimensions, morphology and mechanical properties [7] and also an improvement in the interface shear stress in composite [8].
The corresponding crystalline properties values are listed in Table 1.
Crystallinity properties of the mendong fiber after different stages of alkali treatment.
Online since: March 2013
Authors: Chun Yuan Liu, Yu Liu, Xiao Han
Building Condition Assessment According to the “Code for design of building foundation” [10], due to the factors, such as uneven foundation, large load difference and body complexity, that cause the deformation of foundation, the masonry load-bearing structure should control its local slant.
New material mechanics model can be built with consideration of the material properties of mortar and brick as well as their interaction separately.
Considering adjustments to mechanical properties of homogenized masonry materials, a whole floor model is built based on elastic theory.
Taking the construction process in that time into account, the component, connections and material properties have great differences from current norms.
To simulate the process that settlement affects the building from completion to this day, the constraint condition is established.
Online since: July 2011
Authors: Hong Da Deng, Chun Fu Li, Xian Long Cao, Mei Yu Zhao
Experiment Material and Environment The material used in this work was tubular steel API-P110 (Pangang Group Chendu Steel&Vanadium Co., Lid., China), whose chemical composition and mechanical properties is showed in Table 1.
Electrochemical factors were analyzed by the method based on mixed potential theory [8].
It was shown that pH was a key factor to decide on electrochemical reaction of steel in above solution.
And pH also affects anodic and cathodic reaction rate.
The cathodic current density in the solution at pH2.9 is bigger than about two factors as that at pH5.3 when potential is more negative than -0.9V.
Online since: October 2010
Authors: Chau Lee, Meng Xun Xiem, Nian Fu Wang
Through the purification of hydrogen peroxide, the alcohol affecting the performance of concrete in the ethyl acrylate is removed, and then by the experiment of the basic properties, we realize the impurities and the dosage how to influence the properties of the cement matrix.
By using self-reaction ethyl acrylate polymer, adding hydrogen peroxide to achieve the purpose of purification and carrying on a series of modified cement experiments, we expect the purified products to improve the mechanical strength properties of the mortar, and promote the workability, durability, and other basic properties of the cement matrix.
By changing temperature, reaction time, the dosage of the catalyst and other experiment plans, we try to find the best experimental factors.
The main purpose of the experiment is to explore if ethyl acrylate, purified by hydrogen peroxide and then stirred to modified mortar, has any modified impact on mechanical property.
U., and Ibrahim, M., “Mechanical properties and durability characteristics of polymer- and cement-based repair materials,” Cement and Concrete Composites, Vol. 25, No. 4, pp. 527-537 (2003)
Online since: April 2014
Authors: Eva Dudrová, Margita Kabátová, Peter Kollár, Ján Füzer, Jana Füzerova
The properties of SMCs are influenced by a number of factors, such as particle size, shape and magnetic properties of ferromagnetic powder, manufacturing process.
Particularly important are properties of a coating material determining the density, magnetic and mechanical properties of SMC parts [2, 5].
The wide variability in the composition and processing conditions affecting properties SMCs gives additional space for further investigation.
To understand the different properties of composites the microstructure was analysed, Figs.1-6.
Janghorban, Different annealing treatments for improvement of magnetic and electrical properties of soft magnetic composites, J.
Online since: February 2012
Authors: Takashi Honda, Megumi Uryu, Katsuyuki Kida, Edson Costa Santos, Kenichi Saruwatari
The contact conditions between ball, retainer and race affect the durability of the bearings.
Table 2 presents their mechanical properties.
Mechanical properties of the specimen (a) Bearing steel, SUJ2 Young’s Modulus (Gpa) Poisson’s ratio 207 0.29 (b) Silicon nitreide ball, TSN-03 Bulk density (g/cm3) Bending strength (Mpa) Fracture toughness KIC(MPam1/2) * Young’s modulus (Gpa) Poisson’s ratio 3.23 1011 6.6 294 0.27 * The value was measured by the IF method.
Acta Polytechnica, Mechanical Engineering Series, 1 (1947)
Acta Polytechnica, Mechanical Engineering Series, 2 (1952)
Online since: August 2016
Authors: Bernd Kieback, Olaf Andersen, Thomas Studnitzky, Marie Jurisch
The influence of the refined microstructure on the mechanical properties was evaluated by tensile and microhardness testing.
Similar to MIM, free sintering of the structures is associated with grain growth and thus affects the mechanical properties especially when intricate parts with 100 µm wall thicknesses and grain sizes in the same range come together.
Tensile tests and micro hardness measurements were carried out in order to compare mechanical properties.
Additionally, mechanical properties are influenced by pore form and size.
Summary The influence of THP on microstructural refinement and mechanical properties was investigated in this study.
Showing 15791 to 15800 of 26166 items