A study of the relationship between mechanical characteristics and the coastal vegetation among several broad-leaf trees in Miura Peninsula in Japan

Vegetatio ◽  
1994 ◽  
Vol 112 (2) ◽  
pp. 101-111 ◽  
Author(s):  
S. Meguro ◽  
A. Miyawaki
Keyword(s):  
Mechanical Characteristics ◽  
Coastal Vegetation ◽  
Broad Leaf ◽  
The Relationship

The relationship between the backscattering coefficient and the biomass of narrow and broad leaf crops

2001 ◽  
Vol 39 (4) ◽  
pp. 873-884 ◽  
Author(s):  
G. Macelloni ◽  
S. Paloscia ◽  
P. Pampaloni ◽  
F. Marliani ◽  
M. Gai
Keyword(s):  
Backscattering Coefficient ◽  
Broad Leaf ◽  
The Relationship

Relationship Between Some Physico-Mechanical Properties and Numerical Indexes of Graphite Shape in Compacted-Vermicular Graphite Cast Irons

1982 ◽  
Vol 104 (1) ◽  
pp. 60-65
Author(s):  
Yuichi Tanaka ◽  
Hakaru Saito ◽  
Ikuo Tokura ◽  
Katsuya Ikawa
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Mechanical Characteristics ◽  
Point Of View ◽  
Cast Irons ◽  
Graphite Cast Iron ◽  
Mechanical And Physical Properties ◽  
Definition Of ◽  
Thermal Diffusivities ◽  
The Relationship

The main purpose of this paper is to present some data on the mechanical and physical properties of compacted-vermicular graphite cast iron and to give a reasonable interpretation to the characteristics by using numerical indexes indicating the shape of graphite flakes in the structure. After describing the preparation of the material and a new method for measuring thermal diffusivity of the iron, the influence of kind and amount of alloy added for treatment and of cooling rate upon the graphite shape is discussed by using the indexes of the structure. The thermal diffusivities and mechanical characteristics such as tensile strength and hardness are shown as functions of the indexes to clarify the relationship between them. Furthermore, the present indexes are compared with those proposed earlier to find which is most suitable for the cast iron treated in this work. Authors propose a definition of compacted-vermicular graphite cast iron, which is reasonable from the physico-mechanical point of view, and also show some typical mechanical properties and measures required to produce such cast iron with desirable features.

Tribological and percolation properties of polypropylene/nanodiamond soot composites

2019 ◽  
Vol 28 (6) ◽  
pp. 369-377
Author(s):  
Oleg V Lebedev ◽  
Olga I Bogdanova ◽  
Galina P Goncharuk ◽  
Alexander N Ozerin
Keyword(s):  
Friction Coefficient ◽  
Percolation Threshold ◽  
Mechanical Characteristics ◽  
Testing Procedure ◽  
Test Parameters ◽  
Wear And Friction ◽  
Drastic Increase ◽  
The Relationship ◽  
Disk Testing ◽  
Physical And Mechanical Characteristics

The relationship between surface- and bulk-related physical and mechanical characteristics of polypropylene (PP)-based composites filled with nanodiamond soot (NDS) particles was investigated. The tribological properties of a composite were considered as surface properties. Wear and friction coefficient values were measured using a steel pin-on-composite disk testing procedure under the justified set of test parameters. Loading of NDS particles to the PP matrix resulted in a drastic increase in the composite’s wear resistance. A significant increase in friction coefficient and contact temperature was observed for the composites with NDS content below a certain value assumed to be the percolation threshold for the selected processing method and components used. After the percolation threshold is reached, the friction coefficient decreases sharply and returns to the value characteristic of a filler-free PP. The effects observed were attributed to changes in properties of polymer matrix and composite melt.

Mechanical Characteristics of Origami Mechanism Based on Thin Plate Bending Theory

2019 ◽  
Vol 86 (8) ◽  
Author(s):  
Yu Hongying ◽  
Guo Zhen ◽  
Zhao Di ◽  
Liu Peng
Keyword(s):  
Thin Plate ◽  
Mechanical Characteristics ◽  
Superposition Principle ◽  
Bending Moment ◽  
Deflection Curve ◽  
Paper Surface ◽  
Geometric Characteristics ◽  
Small Deflection ◽  
Thin Plate Bending ◽  
The Relationship

This paper introduces a method for calculating the deformation displacement of the origami mechanism. The bearing capacity of each face can be analyzed by the relationship between the stress and displacement, which can provide a reference for the origami design. The Miura origami mechanism unit is considered. First, the folding angle of each crease is solved based on the geometric characteristics. The deforming form of the creases is then analyzed, and the bending moment acting on the paper surface is solved. Based on the geometric characteristics and stress forms, the paper surface is modeled as a sheet. Based on the bending theory of a thin plate with small deflection, the complex external load forms are decomposed by Levy's method and the superposition principle, and the expression of the deflection curve during the folding process is obtained. According to the stress and bending moment equations, the relationship between the bending moment and displacement is obtained. Finally, through an application example, the maximum deflection of the paper surface is calculated by matlab, and the deflection diagram of the deformed paper surface is drawn, which verifies the expression of the deflection curve.

Study on the Clay Mechanical Characteristics of “Ripping Up the Bottom” in the Yellow River

2012 ◽  
Vol 212-213 ◽  
pp. 108-112 ◽  
Author(s):  
Wen Sheng Dong ◽  
Xiu Fang Jiang ◽  
Xian Feng He ◽  
Ying Ying Zai
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Mechanical Strength ◽  
Water Content ◽  
Critical Condition ◽  
Mechanical Characteristics ◽  
Yellow River ◽  
The Yellow River ◽  
Dry Density ◽  
The Relationship

Aim to the high sandy river “ripping up the riverbed” phenomenon, by experiment, analyzing the relationship between clay dry density, water content, plasticity index and its shear strength, and its mechanical properties. Create the conditions for studying clay mechanical strength and the critical condition of “bottom tearing scour”.

scholarly journals Two cosine wave elastic-plastic contact model

2020 ◽  
Vol 103 (4) ◽  
pp. 003685042098061
Author(s):  
Tieneng Guo ◽  
Xu Hua ◽  
Lingjun Meng ◽  
Zhijie Yan ◽  
Liwei Peng
Keyword(s):  
Mechanical Model ◽  
Deformation Process ◽  
Mechanical Characteristics ◽  
Contact Theory ◽  
Elastic Contact ◽  
The Finite Element Method ◽  
Elastic Plastic ◽  
Mechanics Model ◽  
The Difference ◽  
The Relationship

Based on Hertz elastic contact theory, the contact mechanics model of two cosine wave is established. The mechanical characteristics of the model in the elastic, elastic-plastic, and plastic stages were studied. The influence of load on contact deformation and other characteristics is considered. The finite element method is used to analyze the deformation process of the model, and the results are compared with those of the mechanical model. The effects of amplitude and wavelength of cosine wave on its mechanical characteristics are discussed. The results show that the model reflects the relationship between the load and the mechanical characteristics of the model, and the difference of amplitude and wavelength will affect this characteristic.

scholarly journals Optimization of Thick-Walled Viscoelastic Hollow Polymer Cylinders by Artificial Heterogeneity Creation: Theoretical Aspects

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2408
Author(s):  
Anton Chepurnenko ◽  
Stepan Litvinov ◽  
Besarion Meskhi ◽  
Alexey Beskopylny
Keyword(s):  
Cylindrical Shell ◽  
Internal Pressure ◽  
High Density Polyethylene ◽  
Mechanical Characteristics ◽  
Optimization Technique ◽  
Creep Process ◽  
Mass Content ◽  
Shell Optimization ◽  
Relationship Of ◽  
The Relationship

A theoretical solution of the problem of thick-walled shell optimization by varying the mechanical characteristics of the material over the thickness of the structure is proposed, taking into account its rheological properties. The optimization technique is considered by the example of a cylindrical shell made of high-density polyethylene with hydroxyapatite subjected to internal pressure. Radial heterogeneity can be created by centrifugation during the curing of the polymer mixed with the additive. The nonlinear Maxwell–Gurevich equation is used as the law describing polymer creep. The relationship of the change in the additive content along with the radius r, at which the structure is equally stressed following the four classical criteria of fracture, is determined in an elastic formulation. Moreover, it is shown that a cylinder with equal stress at the beginning of the creep process ceases to be equally stressed during creep. Finally, an algorithm for defining the relationship of the additive mass content on coordinate r, at which the structure is equally stressed at the end of the creep process, is proposed. The developed algorithm, implemented in the MATLAB software, allows modeling both equally stressed and equally strength structures.

Investigation of the Relationship of Muscle Mechanical Characteristics with Biosignal Energy

2006 ◽  
Vol 113 ◽  
pp. 151-156
Author(s):  
Mečislovas Mariūnas ◽  
Kristina Kojelyte
Keyword(s):  
Mechanical Characteristics ◽  
Extreme Points ◽  
Shift Function ◽  
Energy Equality ◽  
Second Derivatives ◽  
Digital Methods ◽  
Relationship Of ◽  
The Relationship ◽  
Analytical Expressions ◽  
Derivatives Of

Based on biosignal energy equality to the work performed by a muscle, in the estimation of energy dissipation within a biolotronic system, analytical expressions have been derived that have helped to calculate major mechanical characteristics of the muscle including elongation of the muscle, speed and acceleration of such elongation. The paper presents the analysis of relevant digital methods alongside with the formulae for the calculation of major mechanical characteristics when the relationship of a muscle biosignal that is presented in a graphical way. As shown, fatigue of the muscle is characterized by one of extreme points of the phase shift function. The values of the first and the second derivatives of the elongation function may be used for the evaluation of functional capacity of the muscle.

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