Composite Middle Lamella Hardness and Young’s Modulus of Artificial Dried Spruce Wood by Nanoindentation

2016 ◽  
Vol 827 ◽  
pp. 320-323
Author(s):  
Zdeněk Prošek ◽  
Jaroslav Topič ◽  
Pavel Tesárek ◽  
Václav Nežerka ◽  
Vlastimil Králik
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Measurement Technique ◽  
Middle Lamella ◽  
Indentation Modulus ◽  
Drying Process ◽  
Stiffness Measurement ◽  
Micromechanical Properties ◽  
Spruce Wood ◽  
Continuous Stiffness Measurement

The presented article deals with the influence of the drying process on the micro-mechanical properties of the composite middle lamella. The purpose of the composite middle lamella is to connecti individual cells. Micromechanical properties were obtained using nanoindentation and directly continuous stiffness measurement technique. Indentation modulus of tested samples was 11.45 GPa for natural dried wood and 12.51 GPa for artificial dried wood.

Comparing Mechanical Properties of Secondary Wall and Cell Corner Middle Lamella in Spruce Wood

IAWA Journal ◽  
1997 ◽  
Vol 18 (1) ◽  
pp. 77-88 ◽  
Author(s):  
Rupert Wimmer ◽  
Barry N. Lucas
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Secondary Wall ◽  
Young's Modulus ◽  
Middle Lamella ◽  
Axial Direction ◽  
High Variability ◽  
Spatially Resolved ◽  
Spruce Wood ◽  
Cell Corner

Mechanical characterizations of the S2 layers and the cell corner middle lamella in the axial direction were investigated in spruce wood, A mechanical properties microprobe capable of measuring hardness and Young's modulus on a spatially resolved basis similar to that of an electron beam microprobe was used. Hardness of the cell comer middle lamella was found to be almost as high as that of the secondary wall, but the Young's modulus of the cell corner middle lamella was 50% less than that of the S2' The S2 showed constant hardness over its range of Young's modulus, but the cell corner middle lamella exhibited a strong correlation (R2 = 0.55) between hardness and the Young's modulus. Further investigations are needed to directly combine chemical and micromechanical properties and also to investigate the mechanical effects of the high variability of cell corner middle lamella chemistry.

Modulus Mapping and its Use to Determine the Effect Process of Drying on the Cells of Spruce

2016 ◽  
Vol 714 ◽  
pp. 25-28
Author(s):  
Zdeněk Prošek ◽  
Jaroslav Topič ◽  
Pavel Tesárek ◽  
Václav Nežerka ◽  
Vlastimil Králík
Keyword(s):  
Mechanical Properties ◽  
Cell Wall ◽  
New Method ◽  
Indentation Modulus ◽  
Drying Process ◽  
Rapid Loss ◽  
Micromechanical Properties ◽  
Micro Level ◽  
Potential Impact ◽  
Pass Through

This article discusses the potential impact of artificial drying to individual cells respectively cell wall, which pass through during the drying process to a rapid loss of water. Parameter of micromechanical properties was used to determine the effect of drying. New method, called "modulus mapping" was used to determine the mechanical properties on nano, micro level. It was found that the indentation modulus of artificially dried sample was lower than for naturally dried sample.

On the measurement of energy dissipation using nanoindentation and the continuous stiffness measurement technique

2013 ◽  
Vol 28 (21) ◽  
pp. 3029-3042 ◽  
Author(s):  
Erik G. Herbert ◽  
Kurt E. Johanns ◽  
Robert S. Singleton ◽  
George M. Pharr
Keyword(s):  
Energy Dissipation ◽  
Measurement Technique ◽  
Stiffness Measurement ◽  
Continuous Stiffness Measurement ◽  
Image Position

Abstract

Measuring Mechanical Properties of Zirconia Dental Crowns by Nanoindentation

2013 ◽  
Vol 591 ◽  
pp. 150-153 ◽  
Author(s):  
Zhao Qiang Meng ◽  
Dan Yu Jiang
Keyword(s):  
Mechanical Properties ◽  
Dental Materials ◽  
Tetragonal Zirconia ◽  
Core Material ◽  
Stiffness Measurement ◽  
High Toughness ◽  
Dental Crowns ◽  
Dental Restorations ◽  
Nanoindentation Testing ◽  
Continuous Stiffness Measurement

Mechanical properties of dental materials are increasingly studied via nanoindentation testing. Due to the excellent mechanical properties, 3-mol%-Yttria-Stabilized Tetragonal Zirconia (3Y-TZP) has become an attractive high-toughness core material for fixed dental restorations. In this paper, the mechanical properties of 3Y-TZP were studied by nanoindentation. The continuous stiffness measurement (CSM) and the single load/unload cycle test controlled by displacement and load respectively were performed with a Berkovich indenter.

Individual Phase Mechanical Properties at Different Temperatures of Sn–Ag–Cu Lead-Free Solders Incorporating Special Pileup Effects Using Nanoindentation

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Muhammad Sadiq ◽  
Jean-Sebastien Lecomte ◽  
Mohammed Cherkaoui
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
High Temperatures ◽  
Elevated Temperatures ◽  
Young's Modulus ◽  
Individual Phase ◽  
Different Temperatures ◽  
Coarse Microstructure ◽  
The Individual ◽  
Continuous Stiffness Measurement

Sn–Ag–Cu (SAC) alloys are considered as good replacements of Sn–Pb alloys which are banned due to the toxic nature of Pb. But, SAC alloys have a coarse microstructure that consists of β-Sn rich and eutectic phases. Nanoindentation is a useful technique to evaluate the mechanical properties at very small length scale. In this work, continuous stiffness measurement (CSM) nanoindentation setup (CSM Instruments SA, Peseux, Switzerland) is used to determine the individual phase mechanical properties like Young's modulus and hardness at high temperatures. It is demonstrated that these properties are a function of temperature for both β-Sn rich and eutectic phases. Loadings starting from 500 μN up to 5000 μN are used with 500 μN steps and average values are presented for Young's modulus and hardness. The loading rates applied are twice that of the loadings. High temperatures result in a higher creep deformation and therefore, to avoid it, different dwell times are used at peak loads. The special pileup effect, which is more significant at elevated temperatures, is determined and incorporated into the results. A better agreement is found with the previous studies.

Sign in / Sign up

Export Citation Format

Share Document