scholarly journals MECHANICAL CHARACTERISTICS AND ESTIMATION METHOD OF BENDING STRENGTH OF EMBEDDED CONNECTION FOR LIGHT-WEIGHT STEEL SQUARE TUBE

2019 ◽  
Vol 84 (756) ◽  
pp. 279-289
Author(s):  
Takumi ITO ◽  
Yuta NAKAIE ◽  
Itsuki YAGI ◽  
Kenjiro MORI ◽  
Chang Hoon CHOI
Keyword(s):  
Mechanical Characteristics ◽  
Bending Strength ◽  
Estimation Method ◽  
Light Weight

Characteristics of Low Temperature Degradation Free ZTA for Artificial Joint

2014 ◽  
Vol 631 ◽  
pp. 18-22 ◽  
Author(s):  
Junji Ikeda ◽  
Takayuki Murakami ◽  
Takayoshi Shimozono ◽  
Reiji Watanabe ◽  
Mikio Iwamoto ◽  
...  
Keyword(s):  
Low Temperature ◽  
Phase Stability ◽  
Mechanical Characteristics ◽  
Bending Strength ◽  
Accelerated Aging ◽  
Ceramic Materials ◽  
Wear Property ◽  
Artificial Joint ◽  
Four Point Bending ◽  
Bearing Materials

Low temperature degradation free Zirconia toughened alumina (ZTA) has been developed. It is reported that ZTA has higher mechanical strength compared to alumina due to the stress induced transformation and spontaneously transformation of zirconia phase on some ZTA have been occurred. For achieving the higher reliability of artificial joint prosthesis alternative to alumina and other ceramic materials, it is necessary to improve and validate the both mechanical characteristics and phase stability at the same time. We evaluated that microstructure, mechanical characteristics and phase stability of newly developed ZTA (BIOCERAM®AZUL). It was confirmed that four-point bending strength and weibull modulus were extreamly high, and ZTA has higher reliability. There were no significant changes and deterioration in four-point bending strength, crystal structure and wear property with and without accelerated aging test. Newly developed ZTA not only with high mechanical characteristics but also with phase stability could be quite useful as bearing materials in artificial joints for longer clinical use.

Study of the Physical and Mechanical Characteristics of the Ice Cover

2019 ◽  
Vol 974 ◽  
pp. 482-487
Author(s):  
A.S. Vasilyev ◽  
V.L. Zemlyak ◽  
V.M. Kozin
Keyword(s):  
Mechanical Characteristics ◽  
Bending Strength ◽  
Winter Season ◽  
Physical And Mechanical Properties ◽  
Ice Cover ◽  
The Arctic ◽  
Structural Failure ◽  
Extreme North ◽  
Far Eastern ◽  
Physical And Mechanical Characteristics

The construction of crossing ferry landings across the Arctic Shelf and the regions located in the Extreme North or Far North, as well as the Siberian and Far Eastern rivers during the winter season is a difficult task of immediate concern. Nevertheless, it is necessary to learn the ice mechanical characteristics in order to examine the bearing capacity of the ice cover at the crossing ferry landings aimed at their establishment and strengthening. The purpose of the paper is to observe the physical and mechanical features of the ice cover by means of doing simulated experiments and verifying their validity using a computational model. The research performed the studies on Young’s modulus of ice definition and bending strength. Ice beam samples were used in the simulated experiments. Their physical and mechanical properties were put to the tests carried out with a special loading device. There was a structural failure of ice beam samples influenced by pure bending. The authors performed numerical computations on the ground of the data obtained by ANSYS software. The calculations resulted in determining condition of the stress-strain state of the samples at any time of loading up to their complete breaking-up. The efficiency of the algorithm is proved by comparing numerical calculations to simulated experimental data.

Thermal Stability and Mechanical Characteristics of Densified Ti3AlC2-Based Material

2015 ◽  
Vol 230 ◽  
pp. 140-143 ◽  
Author(s):  
Tatiana Prikhna ◽  
Orest Ostash ◽  
Tetyana Basyuk ◽  
Andriy Ivasyshyn ◽  
Volodymyr Sverdun ◽  
...  
Keyword(s):  
Room Temperature ◽  
Mechanical Characteristics ◽  
Bending Strength ◽  
Temperature Stability ◽  
Surface Oxidation ◽  
Young Modulus ◽  
Max Phase ◽  
High Temperature Creep ◽  
Self Healing ◽  
Porous Ti

The mechanical properties and temperature stability in air and hydrogen of the highly dense (ρ=4.27 g/cm3, porosity 1 %) material based on nanolaminated MAX phase Ti3AlC2 (89 % Ti3AlC2, 6 % TiC, 5 % Al2O3) manufactured by hot pressing (at 30 MPa) have been investigated. At room temperature the samplesexhibited microhardness HV = 4.6 GPa (at 5 N), hardness HV50 = 630 MPa (at 50 N ) and HRA=70 (at 600 N), Young modulus was 140 ± 29 GPa, fracture toughness K1C=10.2 MPa·m0.5compression strength 700 MPa and bending strength 500 MPa. After 1000 hours of exposition at 600 °C the oxide film (containing mainly Al2O3 and TiO2) formed on the surface and material demonstrated a higher oxidation resistance than chromium ferrite steels. Due to the surface oxidation the defects self-healing took place and the bending strength of the porous Ti3AlC2 (22% porosity) after exposition for 3 h at 600 oC in air slightly (for 3%) increased as compared to that at 20 oC. Besides, the porous Ti3AlC2 material resisted to high-temperature creep and after being kept in H2 at 600 °C for 3h its bending strength reduced by 5 %.

Research on the Deformation Characteristic of EPS Silt Light-Weight Soil

2014 ◽  
Vol 953-954 ◽  
pp. 1614-1617
Author(s):  
Yong Feng ◽  
Yu Bin Pei
Keyword(s):  
Fractal Theory ◽  
Deformation Characteristic ◽  
Estimation Method ◽  
Processing Technique ◽  
Test Method ◽  
Image Processing Technique ◽  
Light Weight ◽  
Soil Microstructure ◽  
Deformation Parameters

EPS silt light-weight soil is a good artificial earthfill material made by EPS foaming materials and silt. At present,the microstructure character of this light-weight soil is rarely understood,besides, it is very difficult to hold the reasonable deformation parameters, therefore, study on the microstructure mechanism and deformation parameters of EPS silt light-weight soil is very important. Based on the image processing technique and fractal theory, the quantitative parameters and the transformation features under the loading process of the EPS silt light-weight soil microstructure can be researched by XRD and SEM tests. According to the indoor and insitu tests, the effect of EPS grain deformation, soilcement strength, test method and the stress level on the deformation characteristic is to be studied by analysing microstructure transformation. Based on the test results and related theory analysis, the relationship between the microstructure character and macroscopical deformation quality of EPS silt light-weight soil will be synthetically approached, the reasonable estimation method of deformation parameters will be discussed, the related research results above will give a favorable theoretical sustentation for the application and expansion of this environmental protection technique.

Bio-Inspired Synthesis of Al2O3/Polymer Composite

2012 ◽  
Vol 724 ◽  
pp. 107-110
Author(s):  
Kyung Mok Nam ◽  
Yoon Joo Lee ◽  
Soo Ryong Kim ◽  
Woo Teck Kwon ◽  
Hyung Sun Kim ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Bending Strength ◽  
High Strength ◽  
Organic Polymer ◽  
Ceramic Plate ◽  
Light Weight ◽  
Polymeric Compound ◽  
Inorganic Hybrid ◽  
Inorganic Composite

The formation of organic-inorganic hybrid composite with ceramic platelets and polymeric compound can have the higher strength and higher elasticity than metal, which is a nanocomposite with high strength and light weight. Ceramic platelet such as Al2O3has been used to form organic-inorganic composite material using PMMA as an organic polymer. Bending strength and density of the composites prepared by infiltration and post-warm pressing were measured. FE-SEM and TG analysis were carried out to determine the microstructure of the organic-inorganic composite materials. Bending strengths and densities of the composites prepared by Al2O3ceramic plate and PMMA after post-warm pressing were ~70MPa and ranged from 2.4 to 2.6, respectively.

scholarly journals Macroscopic Model of an Abrasive Tool

2021 ◽  
Vol 346 ◽  
pp. 01021
Author(s):  
Nikolay Nosov ◽  
Roman Grishin ◽  
Roman Ladyagin ◽  
Vladimir Rodionov ◽  
Yaroslav Gordienko
Keyword(s):  
Mechanical Characteristics ◽  
Bending Strength ◽  
Coefficient Of Thermal Expansion ◽  
Macroscopic Model ◽  
Abrasive Tool ◽  
Empirical Formulas ◽  
Bond System ◽  
Abrasive Tools ◽  
Extensive Experimental Data ◽  
Physical And Mechanical Characteristics

When designing an abrasive tool, it is necessary to know the most important properties of the abrasive grain-bond system. The greatest interest is the study of the physical and mechanical characteristics of the abrasive tool: hardness, density, bending strength, modulus of elasticity, Poisson's ratio, coefficient of thermal expansion, thermal properties, etc. There are extensive experimental data on mechanical testing of abrasive tools in which a number of empirical formulas have been obtained to determine the physical and mechanical characteristics of an abrasive tool (grain size, hardness, structure, grain and bond grade, etc.). The article is based on core several assumptions and hypotheses that determine the limits of applicability of the results obtained, within which the theory has a complete and complete model of the behavior of the abrasive tool.

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