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Online since: October 2021
Authors: Klára Křížová, Martin Ťažký
Although such a low water-cement ratio is the cause of incomplete hydration of all cement grains, its significant reduction affects the resulting mechanical parameters of composite, especially due to the prevention of micropores and capillaries creation that occur during the drainage of redundant water from a composite.
From the resulting mechanical parameters point of view, the most sensitive spot of composite, which is the transition zone between aggregate grains and cement stone, shows significantly better properties thanks to the strong reduction of the water-cement ratio.
High doses of binding agents, together with the significant reduction of the water-cement ratio, often cause the production of composite with unsuitable rheological properties.
OLEK, Influence of aggregate size, water cement ratio and age on the microstructure of the interfacial transition zone, Cement and Concrete Research, Volume 33, Issue 11, 2003, Pages 1837-1849, ISSN 0008-8846 [11] Factors Effecting Strength of Concrete. 
Available from: https://theconstructor.org/concrete/factors-affecting-strength-of-concrete/6220/ [12] EN 12350-2.
Online since: February 2011
Authors: M.K. Besharati Givi, Sina Saeedy
High strength, high ductility and low thermal conductivity cause the austenitic stainless steels to be hard materials to machine so that heat concentrates at the tool cutting edge due to their properties.
Factor DOF Sum of Sqrs.
Factor DOF Sum of Sqrs.
Since AISI 304 is a ductile alloy, the built up edge phenomenon can affect the surface roughness seriously.
It is observed that the optimum condition of cutting speed of 200 m/min and feed rate of 0.2 mm/rev exhibits superior turning properties.
Online since: April 2022
Authors: V. Seithtanabutara, Tanakorn Wongwuttanasatian, T. Pholsawang, P. Keawkannetra
Methanol to oil (M:O) molar ratio, catalyst loading, and reaction were main factors affecting on the process and were investigated using central composite design (CCD) of experiment.
For conventional esterification, the reaction can be improved by mechanical stirring.
According to Al-Sarkari et al. [2], mechanical stirring could result in non-uniform mass transfer due to increased viscosity of the oil phase affects the dispersibility of methanol molecules towards free fatty acids.
Boffito et al. [5] Comparison of esterification of tobacco and canola oil using mechanical stirring and ultrasound assisted reaction.
Its properties are listed in Table 3.
Online since: July 2013
Authors: Ke Han, Da Ming Wu, Ying Liu, Hong Xu
Consequently, if the melt bulk modulus can be measured, not only provides the rationale to the comprehensive of polymer melt physical property, but also promote the polymer molding process technology development. 2.
The experiment measuring method of polymer melt bulk modulus 3.1 Material and sample preparation In the polymer molding processing, PP has the widespread application space, as well as it has good chemical stability, high melting point and good mechanical properties [10].
In order to avoid air bubble in melt affecting the measurement accuracy, PP granule has been made into the test sample (φ9×150 mm) by injection molding.
Because the bulk modulus reflects the ability of material resistance deformation, this ability is mainly affected by the chemical bond property and the chemical bond density and the intermolecular acting force, however the free volume affects chemical bond packing density. consequently the free volume causes the bulk modulus changing [14].
Depending on Polymer Free Volume Theory, the influencing factors and the changing rule of polymer melt bulk modulus were explained.
Online since: May 2023
Authors: Surasak Suranuntchai, Nattarawee Siripath, Sedthawatt Sucharitpwatskul
Forging is highly reliable, large production rate and presents superior mechanical properties with minimum waste of material which can be found in aerospace, automotive, agricultural and other industries.
The main variables that affect the material flow are die geometry, material properties, billet size, frictional condition at the contacting surface, processing initial condition and environment [5].
Methodology Material Properties.
The dimension of the initial billet affects the complete and incomplete metal filling in the die cavity.
In this study, the friction factor, m, was assumed to remain constant.
Online since: October 2017
Authors: Benali Boutabout, Yamina Chelahi Chikr, Ali Merdji, Kheira Bouzouina
It offers the possibility of applying several types of static or dynamic stress on bone tissue with laws of behavior (elastic, elastoplastic) and different mechanical properties.
In general, modeling by the finite element method in biomechanics requires a precise description: - Prosthesis (three-dimensional geometry, mechanical properties, characterization of the bone-implant interface); - Bone structure (three-dimensional geometry, distribution of bone densities, mechanical properties, behavioral laws); - Boundary condition of the prothesis-bone system (forces of contact, muscular forces).
Mechanical properties The mechanical properties of the materials of the dental prosthesis and the mandibular bone of this study are summarized in Table 2.
Interface conditions In general, the success of the treatment depends on many factors affecting the bone-implant, implant-abutment and abutment-prosthesis interfaces [2].
The elastic properties of a human mandible.
Online since: April 2012
Authors: Fei Han, Gao Yong Lin, Da Shu Peng, Qian Li, Rui Fen Long, Qing Zhou
By studying the deformation processing and mechanism of 304 austenitic stainless steel sheets which are under the external stress, the influences of internal and external factors on its deformation could be understood, which is also necessary for developing plastic processing to analyze and control the workpiece quality.
And it was important for understanding the material mechanical properties, using them reasonably and exploring its potential applications.
In order to thoroughly discuss the organization, the structure and the properties’ changes of 304 austenitic stainless steel caused by deformation, the following approaches were taken: samples were pre-stretched to different deformation (15%, 25%, 40%, 60%) at the speed of 3mm/min in the LJ-5000A mechanical tensile testing machine, and then unloaded; the taking samples in various conditions for metallographic analysis, transmission electron microscopy and mechanical properties analysis, etc.
Researches on work hardening of 304 austenitic stainless steel sheets Influence of cold working on the properties of 304 austenitic stainless steel.
The influence of pre-processing deformation degree on the mechanical properties of the sample are shown in Fig.2.
Online since: March 2007
Authors: Hyoung Seop Kim
It is based on recent modelling that appears to provide a conclusive description of the phenomenology and the mechanisms underlying the mechanical properties of NCMs.
Mechanical properties of NCMs have been recently reviewed [4].
It is based on recent modelling that appears to provide a conclusive description of the phenomenology and the mechanisms underlying the mechanical properties of NCMs.
The deformation mechanism map is meaningful in that mechanical properties related with grain size and strain rate can be explained.
One of the main factors governing deformation mechanisms is temperature.
Online since: November 2013
Authors: Wen Jie Tian, Qing Jiang Zhao, Bai Yang Lan, Yi Su Lv
As the piezoelectric quartz crystal has high Q value and stable properties of the chemical and physical, people often use it to stabilize the frequency of the signal source and have achieved great success.
So the above factors should be comprehensively considered to determine the thickness, size and position of the electrodes.
After signal processing, it can suppress the interference factors on the output frequency, so as to get a better force sensitivity coefficient and stability.
So we should control carefully the incentive level according to different requirements in use process of the resonator, making the resonator work in state with better comprehensive properties [6].
Effect of Surface Structure on Properties of Integrate Quartz Resonator [J].
Online since: May 2020
Authors: Jun Li, Xue Feng Song, Xin Zhang, Xue Li Guo, Geng Tang, Hui Yan
Damage evolution of cohesion element refers to the degradation process of mechanical properties after damage initiation.
OD (mm) Elastic Modulus (Gpa) Poisson's Ratio Formation - 22 0.23 Cement Ring 215.9 10 0.17 Casing 177.8 210 0.3 Plug 159.5 10 0.17 Sensitivity Analysis of Cement Plug Parameters in Abandoned Wells Effect of Mechanical Properties on Cement Plug.
Many studies show that mechanical properties are the self-properties of cement paste, the root cause of affecting its sealing, and the basic factor of studying the sealing of cement plug.
The mechanical properties of cement plug mainly include elastic modulus, Poisson's ratio, tensile strength, compressive strength and permeability, among which the influence of elastic modulus and Poisson's ratio on the sealing performance of cement plug is of great significance.
The mechanical properties of cement plug can affect the sealing performance of cement plug.
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