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Online since: February 2018
Authors: Bo Jyun Jhang, Chi-Hung CHIANG, Trong Phuoc Huynh, Chao Lung Hwang
Fresh properties of this new CLSM were investigated through the tests of workability, setting time, and ball drop time.
Fresh properties of the alkali-activated CLSM affect the construction works at sites significantly.
López-Hombrados, Engineering properties of alkali-activated fly ash concrete, J.
Bradić, Mechanical and microstructural properties of alkali-activated fly ash geopolymers, J.
Ueng, Factors influencing mechanical properties of geopolymer: revealed by design of experiments, Taiwan Mining 64 (2012) 37-48
Online since: June 2014
Authors: Christopher C. Chama
Despite the numerous studies that have been conducted on the properties of steels, interest in further improvement of mechanical properties has never waned.
These investigations have established that mechanical properties are affected by microconstituents like martensite [2], cooling pattern [3] and levels of C in steel [4].
A study by Kim and Lee [9] has confirmed that martensite morphology does affect the mechanical properties of steels.
Simmons, (Mechanical Properties of Isothermally Aged High-Nitrogen Stainless Steel), Metall.
Gladman, (An Investigation into Some Factors which Control the Strength of Carbon Steels), The Iron and Steel Institute Special report no.81, 11pp, 1963
Online since: June 2010
Authors: Takayuki Takasugi, Hirofumi Inoue, J. Horiuchi
Texture and Mechanical Properties of AZ31 Magnesium Alloy Sheets Processed by Symmetric/Asymmetric Combination Hot-Rolling J.
In particular, the poor formability of magnesium alloy sheets is one of the main factors hindering an industrial application of this material to various products.
The rolling reduction little affected texture at both rolling temperatures.
Tensile properties at room temperature.
These results are attributed to not only formation of shear texture but also existence of weakened basal texture. 0 45 90 0 100 200 20 30 40 Angle to rolling direction /degree Strength [MPa] Elongation 0.2% proof stress Angle to rolling direction [degree] Elongation [%] HR30% AHR30% HR30%+AHR20% Angle to rolling direction θ/degree WR85% HR30% Fig. 5 In-plane anisotropy of mechanical properties for various rolled sheets
Online since: August 2022
Authors: Rabah Mahmoud Ahmad Ismail, Issam Trrad, Prabhdeep Singh, Juan Carlos Cotrina-Aliaga, Erich Potrich, Jamal Alsadi
Thus, the pigments and Polymer's properties must be well known beforehand.
In plastic: several factors can affect viscosity: particle size (dia), colorant, the thickness of the material, and material type.
Reprocessed PC could be added to virgin PC up to 15% by weight without affecting the virgin PC's properties, they claimed. [13] The ABS and PC mixtures were also described by researchers. [14] The additional researcher studied the phase behavior and rheological of PC/polyester blends [15].
Pham, Investigation of the Effect of Polycarbonate Rate on Mechanical Properties of Polybutylene Terephthalate/Polycarbonate Blends, Edited by Atsushi Sudo.
Khan, Rheological and mechanical properties of ABS/PC blends.
Online since: January 2011
Authors: Chen Huang, Hao Wang
Introduction Silk fabric has graceful appearance and excellent wearing properties so that it has been welcomed by the consumers.
But on the influence of external environmental factors such as UV light, moisture and oxygen, silk fiber has photo-oxidation reaction leading to the degradation of silk protein molecules and become yellow and brittle[1,2,3], which seriously affect silk fabric’s wearing characteristics.
This research investigated changes of the weight and mechanical properties of silk fabrics treated with or without two metal ions (copper sulfate solution and chromium sulfate solution) in different time of light conditions in order to find the way to increase the photostability of silk.
(2) Determination of mechanical properties.
Photodegradation can cause reduction of the weight and tensile properties of the fabric samples, therefore change relation of weight loss and tensile properties of the treated fabrics in sunlight was investigated.
Online since: April 2005
Authors: Pavel Šandera, Jana Horníková, Jaroslav Pokluda
Even in their simplest topological forms containing randomly dispersed equiaxed particles, such composites are rather complex materials, incorporating interfaces with a wide range of properties and internal residual stresses due to processing or thermal misfit.
The ratio between the averaged strain energy release rates (or related stress intensity factors) at the deflected and the undeflected crack front expresses the relative amount of toughening [3,4].
This can be done by numerical computing of local k1, k2 stress intensity factors at the elementary kinked crack tip and by using eq. (1).
The magnitudes of the vectors are proportional to the Keff -factors in respective crack tip positions.
Fig. 2: The map of effective stress intensity factors Keff within the investigated area a) small holes, b) small rigid particles, c) large holes, d) large rigid particles.
Online since: March 2024
Authors: Tomáš Bittner, Dita Jiroutova, Karel Hurtig
Rheological Properties and Segregation of Fresh UHPC with Fibers Affected by Initial Temperature of Concrete Mix Tomáš BITTNER1,a*, Karel HURTIG1,b and Dita JIROUTOVÁ1,c 1CTU, Klokner Institute, Solinova 7, Prague 6, 16607, Czech Republic aTomas.bittner@cvut.cz, bKarel.hurtig@cvut.cz, cDita.jiroutova@cvut.cz Keywords: Segregation, Fibers, Temperature, Properties, UHPC, HPC.
The results have been compared by degree of changes in rheological properties and mechanical parameters.
The critical factor for a properly designed UHPC mixture with steel fibres has been its stability with respect to the distribution of fibres throughout the cross-section or avoiding excessive segregation in the cross-section, while maintaining the properties typical of HPC.
Rheological properties of ultra-high-performance concrete - An overview.
Estimation of rheological properties of UHPC using mini slump test, Constr.
Online since: December 2022
Authors: AlZahraa Furqan Mohammed, Abdul Mohsin Naji Almohaisen, K. Salman Hassan
Mechanical tests as tensile strength, flexural strength, impact strength, shore D hardness are used to learn about the properties of manufactured composites.
The result show increased the mechanical properties of the PMMA denture base material.
Impact Strength Test Result Two factors affect the specimen's efficiency: first, the reinforcement material's capacity to inhibit crack propagation by absorbing energy; and second, the reinforcement fiber and matrix's weak bonding, which results in micro-spaces and crack propagation[19] The values of the hybrid composite specimens' impact strength gradually decreased as the weights proportion of nZrO2 with GFs increased, starting at group A.
Al Badr, Effect of addition ZrO2 nanoparticles to dental composites on the physical and mechanical properties, International Journal of Scientific & Engineering Research, 9 (2018) 1289-1293
Abdulmajeed, Experimental Study for Some of the Mechanical and Physical Properties for the Binary Polymer of (Epoxy Resin-Polyurethane), Tikrit J.
Online since: July 2015
Authors: Si Miao Wang, Ge Chen, Yang Guo, Hong Liang Deng
engineering can be mainly classified into five categories, namely single factor, a few factors in parallel, several factors tied, multiple factors and structural mechanics of rock media properties; according to the stage, all belong to surrounding rock classification of exploration stages, not considering the factors including the limitations of exploration methods, the complex impact of construction environment and time.
Correlation analysis Many factors influence the deformation of surrounding rock,as for their very nature can be divided into three categories: the first category is a natural factors of the geological environment, such as the physical and mechanical properties of rocks, structure and tectonics of rock, groundwater, natural stress state of rock, etc., they determine the quality of the tunnel surrounding rock.
There are two reasons for the deterioration of the surrounding rock stress and deformation over time:first, the rheological properties of the rock mass.
Many rock mass have the obvious rheological properties, especially weak rock,such as clayey rock and mudstone.
The table shows tunnel clearance final variation is mainly influenced by the level of the surrounding rock, and construction factors and external factors also have a great influence on the clearance final variation, while construction factors and external factors are mainly affected by human factors.
Online since: April 2021
Authors: Mikhail N. Roshchin, Valery Alisin
They studied the physical and mechanical properties of coatings by kinetic micro-indentation and tested the plasma sprays for wear resistance.
The authors studied how plasma power, the mass of consumer power, and the table travel speed could affect the distance between secondary dendritic branches, the microstructure, the dilution, the linear scanning test results, and the microhardness as factors that improve the wear resistance of Stellite coating.
They found that the plasmatron travel speed was the most important parameter, as it affected the coating properties the most.
Indentation methods are a common technique for testing the mechanical properties [14].
Mean values of mechanical properties of coatings and counterbodies No.
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