scholarly journals The Relationship between Moisture Content of Human Fingernails and the Mechanical Properties of the Fingernail. Part 3.

2000 ◽  
Vol 34 (2) ◽  
pp. 160-165
Author(s):  
Tooru Sugawara ◽  
Mizue Kawai ◽  
Toshiyuki Suzuki
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
The Relationship

scholarly journals Effect of Bamboo Nodes on the Mechanical Properties of P. edulis (Phyllostachys Edulis) Bamboo

Forests ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1309
Author(s):  
Pengcheng Liu ◽  
Qishi Zhou ◽  
Feiyang Fu ◽  
Wei Li
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Bearing Capacity ◽  
Systematic Research ◽  
Obvious Effect ◽  
Conversion Method ◽  
Bamboo Nodes ◽  
Standardized Parameters ◽  
Building Engineering ◽  
The Relationship

In the context of global sustainable development, the use of natural and renewable bamboo as a building material is of great significance for building engineering. As an important part of bamboo, there is still a lack of systematic research on the effect of bamboo nodes on the mechanical properties of bamboo. In this paper, compression parallel to the grain of the bamboo, bending, tensile parallel to the grain, shear parallel to the grain, compression perpendicular to the grain and tensile perpendicular to the grain tests of an entire bamboo culm of P. edulis bamboo were carried out, and the effects of bamboo nodes on moisture content, bearing capacity and mechanical properties were analyzed. The relationship between the mechanical properties and standardized parameters of the node and internode specimens was established. A conversion method of mechanical properties of the same test type was proposed, and a conversion method among different mechanical properties was proposed. The bamboo was graded by tensile strength parallel to the grain. The results show that bamboo nodes have an obvious effect on the moisture content. Bamboo nodes have different effects on the bearing capacity and mechanical properties of different types of specimens. The mechanical properties of P. edulis bamboo can be predicted by the relationship between the mechanical properties and the standardized parameters and the mechanical property conversion method. The strength classification of P. edulis bamboo can be predicted by standardized parameters.

scholarly journals Effect of Moisture Content on Bursting Liability of Sandstone due to Freeze-Thaw Action

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Kesheng Li ◽  
Maotong Li ◽  
Deng Zhang ◽  
Chuanxiao Liu ◽  
Depeng Ma
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Elastic Strain Energy ◽  
Test Results ◽  
Energy Index ◽  
Cold Region ◽  
Freeze Thaw ◽  
Uniaxial Compressive Test ◽  
Rock Mechanical Properties ◽  
The Relationship

Moisture content (MC) and freeze-thaw (F-T) process have an important influence on the mechanical properties of rock and its rockburst tendency in the cold region. In addition, uniaxial compressive strength (UCS) of rock is of great importance in evaluating weathering durability, frost resistance, and bursting liability of rock. In this study, the UCS of rock and bursting liability index of rock including elastic energy index (WET), impact energy index (WCF), elastic strain energy index (ES), and modified values of brittleness index (BIM) were measured by laboratory tests. These tests were implemented in six different MC (0, 0.58, 1.06, 1.82, 2.43, and 2.80%) and 20 F-T cycles. The relationship between rock mechanical properties, bursting liability of rock, and MC after freeze-thaw damage was established, and the control mechanism of moisture content on mechanical properties and rockburst tendency of rocks in cold regions was revealed. Uniaxial compressive test results showed that the UCS of rock decreases significantly with the increase of MC. Under the action of F-T cycles, WET, WCF, and ES decrease with the increase of MC, and BIM of rock increases gradually. This indicates that the rockburst tendency of sandstone decreases with the increase of MC. To calculate WET, WCF, ES, and BIM of sandstone samples, new empirical equations were established and put forward under different MC after 20 F-T cycles.

scholarly journals Modelling the mechanical response of urushi lacquer subject to a change in relative humidity

2012 ◽  
Vol 468 (2147) ◽  
pp. 3533-3551 ◽  
Author(s):  
X. Liu ◽  
R. D. Wildman ◽  
I. A. Ashcroft ◽  
A. E. Elmahdy ◽  
P. D. Ruiz
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Relative Humidity ◽  
Moisture Content ◽  
Thin Layer ◽  
Mechanical Response ◽  
Experimental Measurements ◽  
Environmental Conditioning ◽  
The Relationship ◽  
Good Agreement

A hygromechanical model has been developed to simulate the in-service behaviour of the natural lacquer urushi , using a phenomenological description of viscoelasticity. The material and mechanical properties were determined as a function of the relative humidity (RH), and the relationship between RH and moisture content was determined. These properties served as inputs to a finite-element-based model that was then tested against experimental measurements of the depth-averaged stresses in a thin layer of urushi deposited on a substrate and exposed to changes in the environmental conditions. Good agreement was seen between the predicted and measured behaviour. The validated model was used to investigate the spatial and temperature variation of stress in urushi films subjected to cyclic environmental conditioning.

scholarly journals The Relationship between Moisture Content of Human Fingernails and the Mechanical Properties of the Fingernail.

1999 ◽  
Vol 33 (3) ◽  
pp. 283-289 ◽  
Author(s):  
Tooru Sugawara ◽  
Mizue Kawai ◽  
Hitoshi Hosokawa ◽  
Toshiyuki Suzuki
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
The Relationship

Energetic relationships for crushing of soil clods

2006 ◽  
Vol 2 (1) ◽  
pp. 51-72
Author(s):  
István Patay ◽  
Virág Sándor
Keyword(s):  
Moisture Content ◽  
Specific Energy ◽  
Soil Moisture Content ◽  
Energy Requirement ◽  
Clay Content ◽  
Clay Soils ◽  
Rigid Support ◽  
Soil Plasticity ◽  
Specific Energy Requirement ◽  
The Relationship

Clod crushing is a principal problem with soils of high clay content. Therefore, there is a need for determining the conditions for clod breaking and clod crushing. The objective of the work was to develop a special purpose tool for single clod breaking both by rigid support of the clod and by a single clod supported by soil and to develop a machine for clod crushing. Furthermore, the purpose was to determine the relationship between the specific energy requirement for clod crushing in the function of soil plasticity and the soil moisture content by the means of the developed tool and machine. The main result of the experiments is summarized in a 3D diagram where the specific energy requirement for soil clod crushing is given in the function of the moisture content and the plasticity index for different clay soils.

Sunlight exposure: the effects on the performance of paragliding fabric

2018 ◽  
Vol 69 (05) ◽  
pp. 381-389
Author(s):  
MENGÜÇ GAMZE SÜPÜREN ◽  
TEMEL EMRAH ◽  
BOZDOĞAN FARUK
Keyword(s):  
Mechanical Properties ◽  
Aging Process ◽  
Air Permeability ◽  
Sunlight Exposure ◽  
Test Results ◽  
Coating Materials ◽  
Strength Tests ◽  
Before And After ◽  
The Relationship ◽  
Dark Blue

This study was designed to explore the relationship between sunlight exposure and the mechanical properties of paragliding fabrics which have different colors, densities, yarn counts, and coating materials. This study exposed 5 different colors of paragliding fabrics (red, turquoise, dark blue, orange, and white) to intense sunlight for 150 hours during the summer from 9:00 a.m. to 3:00 p.m. for 5 days a week for 5 weeks. Before and after the UV radiation aging process, the air permeability, tensile strength, tear strength, and bursting strength tests were performed. Test results were also evaluated using statistical methods. According to the results, the fading of the turquoise fabric was found to be the highest among the studied fabrics. It was determined that there is a significant decrease in the mechanical properties of the fabrics after sunlight exposure. After aging, the fabrics become considerably weaker in the case of mechanical properties due to the degradation in both the dyestuff and macromolecular structure of the fiber

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