Experimental study of the effect of heating rate and environment on the young's modulus of carbon-fiber plastics in a broad temperature range

1986 ◽  
Vol 22 (1) ◽  
pp. 19-22
Author(s):  
N. V. Skvortsova
Keyword(s):  
Experimental Study ◽  
Carbon Fiber ◽  
Young’S Modulus ◽  
Heating Rate ◽  
Young's Modulus ◽  
Broad Temperature Range ◽  
Temperature Range

Two-Stage Sintering of Alumina-Y-TZP (Al2O3/Y-TZP) Composites

2019 ◽  
Vol 814 ◽  
pp. 12-18 ◽  
Author(s):  
Sivakumar Sivanesan ◽  
Teow Hsien Loong ◽  
Satesh Namasivayam ◽  
Mohammad Hosseini Fouladi
Keyword(s):  
Fracture Toughness ◽  
Young’S Modulus ◽  
Heating Rate ◽  
Vickers Hardness ◽  
Young's Modulus ◽  
Two Stage ◽  
Dwelling Time ◽  
Microstructure Density

Alumina-Y-TZP composites between 0 to 25 vol% Y-TZP content produced via conventional two-stage sintering with T1 ranging between 1400°C and 1550°C, heating rate of 20°C/min, followed by T2 of 1350°C and 12 hours dwelling time. The microstructure, density, Vickers hardness (HV), Young’s modulus (E) and fracture toughness (KIC) of the sintered samples were then evaluated. It is observed that all samples up to 10 vol% Y-TZP achieved > 98% T.D. as the T1 increases. Samples with Y-TZP content above 10 vol% resulted in a significant decrease in density and hardness. Samples with ≤ 10 vol% Y-TZP sintered at T1 of 1450°C was able to achieve density > 98% T.D., Vickers hardness > 18 GPa and Young’s modulus > 380 GPa and fracture toughness > 6 MPam1/2 when compared to pure Al2O3 ceramics.

Identifying the limitation of Oliver and Pharr method in characterizing the viscoelastic-plastic materials with respect to indenter geometry

2008 ◽  
Vol 1137 ◽  
Author(s):  
Keerthika Balasundaram ◽  
Yanping Cao ◽  
Dierk Raabe
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Polymeric Materials ◽  
Analysis Method ◽  
Correct Evaluation ◽  
Nano Scale ◽  
Plastic Materials ◽  
Indenter Geometry

AbstractNanoindentation tests are widely used in recent years to characterize the mechanical properties of viscoelastic-plastic materials like polymers and biomaterials at the micro or nano-scale using the analysis method proposed by Oliver & Pharr (OP). However, recent studies revealed that the mechanical properties of viscoelastic-plastic (polymeric) materials determined using the OP method does not lead to a correct evaluation of Young's modulus. A systematic experimental study is performed with different indenter geometries like spherical and Berkovich geometries using various polymers in order to identify the limitations of the OP method.

Significance of the heating rate on the physical properties of carbonized maple wood

Holzforschung ◽  
2008 ◽  
Vol 62 (5) ◽  
Author(s):  
Xinfeng Xie ◽  
Barry Goodell ◽  
Yuhui Qian ◽  
Michael Peterson ◽  
Jody Jellison
Keyword(s):  
Electrical Resistivity ◽  
Physical Properties ◽  
Young’S Modulus ◽  
Heating Rate ◽  
Young's Modulus ◽  
Slow Heating ◽  
Graphene Sheets ◽  
Heating Rates ◽  
Cross Sectional ◽  
Carbonized Wood

Abstract Effects of the heating rate on the physical properties of carbonized wood were investigated by comparing the dimensional shrinkage, electrical resistivity, Young's modulus, and the evolution of turbostratic crystallites in maple hardwood samples carbonized at 600°C, 800°C, and 1000°C under heating regimes of 3°C h-1 and 60°C h-1. Important carbonized wood properties that developed at high temperature and high heating rates could also be produced at slow heating rates and lower temperatures. Furthermore, slow heating rates promoted the formation and growth of graphene sheets in turbostratic crystallites, which had a significant influence on the electrical resistivity and Young's modulus of the carbonized wood. The results indicate that the graphene sheets of turbostratic crystallites formed during wood carbonization were arranged parallel to the axial direction of wood cells and at an angle to the circumference of wood cells in the cross-sectional plane. With regard to the production of carbon products, a decrease in the heating rate may be beneficial for char properties and the prevention of crack production during manufacture of large monolithic carbon specimens from wood and wood-based materials.

AN EXPERIMENTAL STUDY OF THE ELASTIC PROPERTIES OF ROCKS

Geophysics ◽  
1936 ◽  
Vol 1 (3) ◽  
pp. 347-352 ◽  
Author(s):  
J. M. Ide
Keyword(s):  
Experimental Study ◽  
Young’S Modulus ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Transverse Wave ◽  
Isotropic Medium ◽  
Young's Modulus ◽  
Field Measurements ◽  
Rock Samples ◽  
Wave Velocities

Laboratory determinations of Young’s modulus, rigidity, and compressibility were made on a set of representative rock samples. These measurements are compared with the theoretical relations between the elastic constants of an isotropic medium. Computed longitudinal and transverse wave velocities are compared with direct field measurements by Leet in granite and norite. Agreement is within 5 per cent for norite, and 20 per cent for granite.

scholarly journals Влияние водорода на модуль Юнга и внутреннее трение сплава V-4Ti-4Cr

2021 ◽  
Vol 63 (12) ◽  
pp. 2138
Author(s):  
Б.К. Кардашев ◽  
К.В. Сапожников
Keyword(s):  
Internal Friction ◽  
Temperature Dependence ◽  
Young’S Modulus ◽  
Hydrogen Content ◽  
Young's Modulus ◽  
Relaxation Peak ◽  
Temperature Spectrum ◽  
Temperature Range ◽  
Oscillation Frequencies

Young's modulus and internal friction of the V-4Ti-4Cr alloy with different hydrogen content were studied in the temperature range of 100 − 300 К at oscillation frequencies of about 100 kHz. It is shown that hydrogenation of the alloy gives rise to a minimum in the temperature dependence of Young's modulus due to the precipitation/dissolution of vanadium monohydride particles, and a relaxation peak in the temperature spectrum of internal friction at temperatures of about 140 К, which can be associated with the Snoek-type hydrogen relaxation caused by the Ti-H interaction.

scholarly journals Experimental study on Young's modulus E of a polymer composite reinforced by nano titanium dioxide particles

2012 ◽  
Vol 34 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Nguyen Dinh Duc ◽  
Dinh Khac Minh
Keyword(s):  
Experimental Study ◽  
Titanium Dioxide ◽  
Young’S Modulus ◽  
Polymer Composite ◽  
Modulus Of Elasticity ◽  
Young's Modulus ◽  
Theory And Practice ◽  
Composite Filler ◽  
Nano Titanium Dioxide ◽  
Elastic Modules

There are many formulas proposed by different authors in order to determine elastic modules for composite filler particles. This article aims to present the experiment's results and to review some formulas for determining Young's modulus of elasticity E of the polyester filler titanium dioxide particles composite. The results showed that there was a relatively good fit between theory and practice of some formulas.

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