Effect of the Elasticity Modulus of the Jig Material on the Blade Edge Shape in the Grinding Process of Sapphire Medical Knife - Part 2 Verification of the Chipping Phenomenon and Elastic Modulus of the Jig Material

The aim of this study was to determine the hardness and the elasticity modulus of the two composite resins base of BISGMA with different inorganic particles: a nanoparticulated with a ceramic withload, (Filtek Z350XT-3M) with and without thermal activation and a microhybrid with no ceramic load (Opallis-FGM). The samples were prepared and subjected to the tests of Vickers hardness (Shimadzu HMV) and acoustic excitation pulse (Sonelastic ®). The samples were divided into three groups: G1-Filtek Z350 XT; G2-Filtek Z350XT MO (subject to further polymerization microwave) and G3-Opallis. The results showed that the hardness of G2 was significantly higher than the groups G1 and G3. The elastic modulus was higher than the G2 to G1 and G3. One can conclude that the resins filled with inorganic ceramic filler showed higher hardness and elastic modulus. The thermal activation increased the hardness and the elasticity modulus of the resin with ceramic load.

Download Full-text

RIGIDITY AND STRENGTH ANALYSIS OF REINFORCED CONCRETE BEAMS BY VARYING ELASTICITY MODULUS

Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel nogo universiteta JOURNAL of Construction and Architecture ◽

10.31675/1607-1859-2018-20-4-86-93 ◽

2018 ◽

pp. 86-93

Author(s):

D. R. Mailyan ◽

G. V. Nesvetaev

Keyword(s):

Elastic Modulus ◽

Reinforced Concrete ◽

Elasticity Modulus ◽

Concrete Beams ◽

Concrete Strength ◽

Reinforced Concrete Beams ◽

Strength Analysis ◽

Normal Stresses ◽

Technological Factors ◽

Beam Analysis

Relevance: The actual values of the elastic modulus used for manufacturing reinforced concrete products and concrete structures may differ significantly from those given in SNiP 63.13330. It is therefore interesting to estimate the rational value of the elasticity modulus of concrete for a particular design. Purpose: Calculation algorithm is proposed for normal stresses and deformations based on variation of the elasticity modulus of concrete by controlling prescribed and technological factors. Materials and methods: Ordinary concrete grades up to В120 grade with organic and mineral modifiers, reinforced concrete beams, modeling, numerical experiment, beam analysis by normal stresses and deformations. Results: The proposed beam analysis algorithm considers a possible change up to 2 times in the elasticity modulus of concrete. Conclusions: Calculations of the elasticity modulus ensure the beam rigidity, taking into account its reinforcement and cross-sectional parameters and strength for normal stresses at a concrete strength normalization corresponding to the elastic modulus, with regard to prescribed and technological factors.

Download Full-text

Post-irradiation effects on Nylon-fibers reinforced concretes

e-Polymers ◽

10.1515/epoly.2010.10.1.457 ◽

2010 ◽

Vol 10 (1) ◽

Cited By ~ 1

Author(s):

Gonzalo Martínez-Barrera ◽

Carmina Menchaca-Campos ◽

Enrique Vigueras- Santiago ◽

Witold Brostow

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Elastic Modulus ◽

Gamma Radiation ◽

Elasticity Modulus ◽

Silica Sand ◽

Irradiation Effects ◽

Application Range ◽

Second Stage ◽

Long Storage

AbstractFiber-reinforced concretes (FRCs) have a wider application range than ordinary concretes. Properties of FRCs necessarily depend on the characteristics of the aggregates used. We have studied first effects of gamma radiation on mechanical properties of hydraulic concretes containing Portland cement, silica sand, marble, water and Nylon fibers. Compressive strength and dynamic elasticity modulus are of particular importance. In the second stage we have analyzed the changes in these mechanical properties after storage of our concretes for three years. The long storage results in a 97 % of increment in the compressive strength and simultaneous lowering by 35 % of the dynamic elastic modulus. We find a larger influence of the Nylon fibers than those of silica sand and marble on mechanical properties of the concretes.

Download Full-text

Effect of solution treatment on the microstructure and mechanical properties of Ti-6Al-6Mo hot-rolled alloy

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.13.2.2019.07.0404 ◽

2019 ◽

Vol 13 (2) ◽

pp. 4857-4868

Author(s):

Alfirano . ◽

S. S. Friandani ◽

C. Sutowo

Keyword(s):

Mechanical Properties ◽

Elastic Modulus ◽

Elasticity Modulus ◽

Solution Treatment ◽

Treatment Temperature ◽

Air Cooling ◽

Solution Treatment Temperature ◽

Water Cooling ◽

Hot Workability ◽

Hot Rolled

Titanium and its alloys are widely used in biomedical applications due to their unique combination of good hot workability, high specific strength and good corrosion resistance. In this study, elastic modulus, hardness and the effects of solution treatment on microstructures and mechanical properties of Ti-6Al-6Mo hot-treated alloy were investigated using OM (optical microscopy), XRD (X-ray diffractometry), SEM (Scanning electron microscopy), Ultrasonic testing and hardness testing. Previously, the sampels were hot-rolled at 900oC for 1 h with a total reduction of 50%,and then followed by air cooling. The samples were carried out solution treatment for 1 h at 850oC and 950oC, followed by water cooling and at temperature of 1050oC with water and air cooling. The results indicate that the hardness of the Ti-6Al-6Mo alloy increased with the increasing of solution treatment temperature on the water cooling, while the elastic modulus was decreased. The lowest elasticity modulus value and the highest hardness, 125.4 GPa and 46.3 RC were obtained at 1050oC with equiaxed micro structure and β' precipitate. XRD analysis exhibited the presence of α and β phases in Ti-6Al-6Mo alloys after solution treatment. Based on the relative intensity of XRD strongest peak analysis, the α phase intensity decreases with the increasing of solution treatment temperature, this phenomenon causes the decreasing of elasticity modulus value with the increasing of solution treatment temperature on water cooling medium.

Download Full-text

Influence of ANO3 and ANO3·nH2O Nitrates on the Deformation Properties of Aluminosilicate Adhesives for Wood Products and Structures

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1038.210 ◽

2021 ◽

Vol 1038 ◽

pp. 210-220

Author(s):

Sergii G. Guzii ◽

Volodymyr Romaniuk ◽

Svitlana Davydivna Lapovska ◽

Oleg Semkiv ◽

Ihar Bazhelka

Keyword(s):

Elastic Modulus ◽

Elasticity Modulus ◽

Beech Wood ◽

Potassium Nitrate ◽

Wood Products ◽

Depth Of Penetration ◽

Oak Wood ◽

Glue Joint ◽

Deformation Properties ◽

Wooden Products

As a result of the research, the deformation properties of aluminosilicate adhesives modified with nitrate salts and intended for gluing wooden products and structures made of pine, beech and oak wood at different stages of their hardening were determined. Considering that pine is the most common wood in the manufacture of products and structures, then in order to reduce the numerical values of the elastic modulus in glued materials, it is advisable to add ammonium, lithium and sodium nitrates in an amount of 0.5%, potassium nitrate in an amount of 1% into the composition of an aluminosilicate adhesive. which will ensure the approximation of the elastic modulus values to the values of the unmodified aluminosilicate adhesive and will significantly affect the water resistance of the glue joint and the depth of penetration of the adhesive into the wood structure. For gluing beech wood products to reduce the elasticity modulus, it is advisable to introduce 0.5% ammonium and potassium nitrates and 1% lithium and sodium nitrates, which will reduce the numerical values of the elastic modulus in glued materials by 1.18 and 1.53 times compared with the values of the elastic modulus of the unmodified aluminosilicate adhesive. For gluing oak wood products to reduce the elasticity modulus, it is advisable to introduce 0.5% potassium nitrate and 1.5% sodium nitrate, which will reduce the numerical values of the elastic modulus in glued materials by 1.4 and 2.83 times compared to the values modulus of elasticity of unmodified aluminosilicate adhesive.

Download Full-text

Effect of density of cement-sand matrix and type of steel fibers on the density and elasticity modulus of steel fiber reinforced concrete at heating during the fire

Вестник гражданских инженеров ◽

10.23968/1999-5571-2020-17-5-147-154 ◽

2020 ◽

Vol 17 (5) ◽

pp. 147-154

Author(s):

V. A. Dorf ◽

◽

R. O. Krasnovskij ◽

D. E. Kapustin ◽

P. S. Sultygova ◽

...

Keyword(s):

Elastic Modulus ◽

Reinforced Concrete ◽

Elasticity Modulus ◽

Steel Fiber ◽

Heating Temperature ◽

Fiber Reinforced Concrete ◽

Steel Fibers ◽

Fiber Reinforced ◽

Steel Fiber Reinforced Concrete ◽

The Impact

The paper considers the results of the impact of high temperatures during the fire on changes in the density and elasticity modulus of steel fiber reinforced concrete (SFRC) at different values of density of the cement-sand matrix corresponding to its flexural strength of 5.0 and 8.5 MPa. It is shown that in the temperature range from 20 to 1100 °C, the diagrams «Density of steel fiber reinforced concrete - heating temperature» are linear and their shape does not depend on the type of fiber and its content in steel fiber reinforced concrete. The results of the performed studies allow determining the change in the elastic modulus of the SFRC after heating.

Download Full-text

Determination of the Elastic Modulus of Hydroxyapatite Doped with Magnezium through Nondestructive Testing

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.814.115 ◽

2013 ◽

Vol 814 ◽

pp. 115-122 ◽

Cited By ~ 9

Author(s):

Oana Suciu ◽

Liviu Bereteu ◽

Gheorghe Drăgănescu ◽

Teodora Ioanovici

Keyword(s):

Mechanical Properties ◽

Elastic Modulus ◽

Chemical Element ◽

Elasticity Modulus ◽

Implant Surface ◽

Vibration Signals ◽

Normal Bone ◽

Determination Methods ◽

Normal Bone Tissue

In this paper there are presented determination methods of longitudinal elasticity modulus based on processing and analysis of vibration signals which are the results of an impulse from a small rigid ball applied on some samples of hydroxyapatite with discoid form. Hydroxyapatite is a bioactive bioceramics used, usually in implants, rods and screws covering, in order to allow human tissue to adhere to implant surface. In order to improve mechanical properties of hydroxyapatite it is doped with magnesium. This chemical element exists in normal bone tissue; it doesnt create any compatibility problem and has a stabilizing role in heat treatments stopping undesirable phase transformations.

Download Full-text

Elasticity Modulus and Hardness of Bearing Steel after Laser Treatment

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.887.247 ◽

2021 ◽

Vol 887 ◽

pp. 247-253

Author(s):

V. Morozov ◽

V.G. Gusev ◽

D. Gavrilov

Keyword(s):

Surface Layer ◽

Elastic Modulus ◽

Laser Treatment ◽

Elasticity Modulus ◽

Bearing Steel ◽

Workpiece Surface ◽

Processing Mode ◽

Laser Technologies ◽

Laser Equipment ◽

Layer Increase

The article considers the effect of laser treatment of bearing steel on the change in the elasticity modulus and hardness of the steel SHH15SG. Multi-factor models were obtained that relate the output parameters to the power W of laser radiation, the longitudinal feed Spr of the laser beam and the distance L from the protective glass of the focusing head to the workpiece surface. According to the degree of reduction of the influence on the elastic modulus of steel SHH15SG subjected to laser treatment, these factors are arranged in a sequence: W, Spr, and L. With increasing W and L the modulus of elasticity and hardness of the treated surface layer increase. 3M-XYZ surface-graphs, 3M-XYZ contour-graphs of interactive influence of independent factors on the elastic modulus and hardness of the surface layer are constructed, which simplifies the procedure for assigning the processing mode. The research results are useful for manufacturing and design companies that implement laser technologies and create laser equipment.

Download Full-text

Research on the Factors Affect the Settlement of Soft Pile in Double-Layered Foundation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.4512 ◽

2010 ◽

Vol 163-167 ◽

pp. 4512-4519

Author(s):

Shi Min Zhang ◽

Kai Yu ◽

Zhi Ding ◽

Hao Miao Yang

Keyword(s):

Elastic Modulus ◽

Elasticity Modulus ◽

Three Dimensional ◽

Vertical Load ◽

Preferential Treatment ◽

Element Analysis ◽

Dimensional Finite Element ◽

Pile Settlement ◽

Three Dimensional Finite Element ◽

The Impact

The pile work on the complex properties of three-dimensional finite element analysis has been made by building-up one 4x4 soft pole. Having studied on the factors which affect the flexibility pole compound foundation settlement factor in foundation, include the level of vertical load, elastic modulus of the pile, cushion thickness and elastic modulus. The results show that: the impact of soft pile settlement of the factors, the level of vertical load and pile elastic modulus greater impact cushion modulus of elasticity and thickness of the less affected. As for the pole body elasticity modulus and the bed course elasticity modulus, the compound foundation existence is controlled give value preferential treatment most subsides, the bed courses among them almost can be ignored since effect is less.

Download Full-text