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Online since: January 2011
Authors: Minoru Yamashita, Toshio Hattori, Noriyuki Sawada
The mechanical property of the compressed wood was discussed [1-5].
The objective is to investigate the effect of the compressive ratio in biaxial compression on the change in the mechanical property under impact or quasi-static condition.
Initial Rv: 25 % Rv: 40 % Rv: 60 % Fig.4 Progressive deformation patterns in equal-biaxial compression Rv: Reduction in volume Testing Conditions of 4-point Impact Bending Test The mechanical property of the biaxially compressed wood is evaluated by the 4-point bending test as shown in Fig.5.
The gage length of the strain gage is 5mm and its gage factor is 2.1.
The effect of compression ratio remarkably affects the change in Young’s modulus when the wood becomes dense.
The objective is to investigate the effect of the compressive ratio in biaxial compression on the change in the mechanical property under impact or quasi-static condition.
Initial Rv: 25 % Rv: 40 % Rv: 60 % Fig.4 Progressive deformation patterns in equal-biaxial compression Rv: Reduction in volume Testing Conditions of 4-point Impact Bending Test The mechanical property of the biaxially compressed wood is evaluated by the 4-point bending test as shown in Fig.5.
The gage length of the strain gage is 5mm and its gage factor is 2.1.
The effect of compression ratio remarkably affects the change in Young’s modulus when the wood becomes dense.
Online since: July 2024
Authors: Rana Rabnanwaz Ahmed, Syed Muhammad Shahrukh Ali
They explored the material properties and physical responses, and recorded in the result whether the material is resistant to flood damage or not [4].
Furthermore, it suggests the criteria of using building material that causes minimal damage to the physical and mechanical properties, when checked before and after the flood event.
Moreover, they specify the individual testing of properties to assess the capacity of a material [4].
No Criteria Explanation 1 Durability Standing under flooding without loss of shape. 2 Mechanical Properties Bonding, compressive strengths, tensile strength, modulus etc. 3 Physical Properties Appearance, texture, color, moisture, cracking, etc. 4 Erosion-Resistant Progressive loss from the original state. 5 Impermeability Ability to resist pervasion.
It is notable, that the studies presented in literature review does not incorporate the holistic approach and does not consider the economic and financial factors in their studies.
Furthermore, it suggests the criteria of using building material that causes minimal damage to the physical and mechanical properties, when checked before and after the flood event.
Moreover, they specify the individual testing of properties to assess the capacity of a material [4].
No Criteria Explanation 1 Durability Standing under flooding without loss of shape. 2 Mechanical Properties Bonding, compressive strengths, tensile strength, modulus etc. 3 Physical Properties Appearance, texture, color, moisture, cracking, etc. 4 Erosion-Resistant Progressive loss from the original state. 5 Impermeability Ability to resist pervasion.
It is notable, that the studies presented in literature review does not incorporate the holistic approach and does not consider the economic and financial factors in their studies.
Online since: January 2019
Authors: Cong Liu, Xiao Dong Yan, Wei Ye, Yin Yang
Introduction
Tube and tube processing parts are widely applied to aerospace, automobile manufacturing, petrochemical and other fields due to their excellent mechanical properties, diverse structural functions and lightweight requirements[1,2].
Da-xin E et al. [11] studied the influence of mechanical properties and bending angle on the springback of the tube after bending and unloading through experiments and numerical simulation.
The material properties of the tube in the finite element model include the physical property parameters and the yield stress-plastic strain (true stress-strain) curve.
Fig. 2 3D FE model of tube bending Fig. 3 True stress-strain curves of TA18 tube Table 1 Physical properties parameters of material material Density[kg·m3] elasticity modulus[Mpa] poisson ratio TA18 4490 109.8×105 0.31 Taking both accuracy and efficiency into consideration, the model uses a symmetrical half-tube model, double-precision computation and a mass scaling factor of 1000.
"Coupling effects of material properties and the bending angle on the springback angle of a titanium alloy tube during numerically controlled bending."
Da-xin E et al. [11] studied the influence of mechanical properties and bending angle on the springback of the tube after bending and unloading through experiments and numerical simulation.
The material properties of the tube in the finite element model include the physical property parameters and the yield stress-plastic strain (true stress-strain) curve.
Fig. 2 3D FE model of tube bending Fig. 3 True stress-strain curves of TA18 tube Table 1 Physical properties parameters of material material Density[kg·m3] elasticity modulus[Mpa] poisson ratio TA18 4490 109.8×105 0.31 Taking both accuracy and efficiency into consideration, the model uses a symmetrical half-tube model, double-precision computation and a mass scaling factor of 1000.
"Coupling effects of material properties and the bending angle on the springback angle of a titanium alloy tube during numerically controlled bending."
Online since: June 2008
Authors: Se Hyun Ko, Keun Song, Il Ho Kim, Jin Man Jang, Won Sik Lee
As a result, size of grains was a predominant factor for high resistance at low
applied load and/or sliding velocity, while hardness at higher applied load or velocity.
Mechanical milling(MM) and alloying(MA) were carried out for 12 hrs in 320 rpm using 304 stainless steel balls(Φ 6.35 mm) and container coated with pure Al.
Results and Discussion Microstructures and mechanical properties.
However, wear mechanisms, such as adhesion and abrasion etc, is known well to be obviously affected by microstructures.
Thus, in this work, wear tests were performed in more detail varying the factors of sliding distance, velocity and applied load to investigate the effects of grain size.
Mechanical milling(MM) and alloying(MA) were carried out for 12 hrs in 320 rpm using 304 stainless steel balls(Φ 6.35 mm) and container coated with pure Al.
Results and Discussion Microstructures and mechanical properties.
However, wear mechanisms, such as adhesion and abrasion etc, is known well to be obviously affected by microstructures.
Thus, in this work, wear tests were performed in more detail varying the factors of sliding distance, velocity and applied load to investigate the effects of grain size.
Online since: December 2010
Authors: Abbas Kouzani, Md. Saiful Islam, Xiu Juan Dai, Wojtek P. Michalski
These nanostructures offer a greater flexibility for the surface functionalization as well as more flexible mechanical properties.
Unlike the widely used CNT, the properties of BNNT are independent of its diameter [5].
Such properties together with the excellent mechanical property and thermal conductivity make BNNT a potential candidate for biosensing applications [7, 8].
Mechanical.
The sensitivity of this biosensing system as a whole depends on a number of factors (e.g., length and diameter of CNT/BNNT, position of beam and target probe).
Unlike the widely used CNT, the properties of BNNT are independent of its diameter [5].
Such properties together with the excellent mechanical property and thermal conductivity make BNNT a potential candidate for biosensing applications [7, 8].
Mechanical.
The sensitivity of this biosensing system as a whole depends on a number of factors (e.g., length and diameter of CNT/BNNT, position of beam and target probe).
Online since: November 2012
Authors: Si Jing Cai, Miao Guo, Shu Qi Ma
Introduction
Seepage is one of the key factors in affecting the security and stability of mine tailings dam.
(a) The initial dam (b) The accumulative dam Fig. 1 Photos of the target tailings dam According to the tailings geotechnical study and the dam design information, material partition of the tailings was shown in Figure 2, and the mechanical parameters of materials were listed in Table 1.
Table 1 Mechanical properties of each stratum Lithology Specific weight /KN/m3 Cohesion /kPa Internal friction angle/º Permeability coefficient /cm/s Elastic modulus /MPa Poisson’s ratio Initial dam 22 0 38 0.2 70 0.22 Plain fill 19.23 46.52 15.41 9.28×10-3 25 0.35 Phosphorus gypsum 16.0 0.3 30 5.56×10-4 33 0.3 Highly weathered sandstone 25.5 13.1 37.07 1.17×10-4 10000 0.2 Based on the actual dam shown in Fig.1, a numerical model was established by using ANSYS software.
(a) The initial dam (b) The accumulative dam Fig. 1 Photos of the target tailings dam According to the tailings geotechnical study and the dam design information, material partition of the tailings was shown in Figure 2, and the mechanical parameters of materials were listed in Table 1.
Table 1 Mechanical properties of each stratum Lithology Specific weight /KN/m3 Cohesion /kPa Internal friction angle/º Permeability coefficient /cm/s Elastic modulus /MPa Poisson’s ratio Initial dam 22 0 38 0.2 70 0.22 Plain fill 19.23 46.52 15.41 9.28×10-3 25 0.35 Phosphorus gypsum 16.0 0.3 30 5.56×10-4 33 0.3 Highly weathered sandstone 25.5 13.1 37.07 1.17×10-4 10000 0.2 Based on the actual dam shown in Fig.1, a numerical model was established by using ANSYS software.
Online since: January 2013
Authors: Shao Jun Han, Chao Chen, Xiong Li
Study on block structure optimization of single degree of freedom
crankshaft fillet rolling machine
Shaojun Han1, a, Chao Chen2, b, Xiong Li3, c
1Department of Electrical and Mechanical Engineering Wuhan University of Technology
Wuhan, China
2Department of Electrical and Mechanical Engineering Wuhan University of Technology
Wuhan, China
3Tri-Ring Group Corporation, Wuhan, China
ahanshjun@163.com, b578908786@qq.com, c249444797@qq.com
Keywords: SDOF rolling arm, ANSYS, Optimization
Abstract.
According to the Q235 steel characteristics defined in Table1, to define the material properties.
The main factors affecting the strength of the rolling arm are the arm thickness, material and structural shape.
According to the Q235 steel characteristics defined in Table1, to define the material properties.
The main factors affecting the strength of the rolling arm are the arm thickness, material and structural shape.
Online since: January 2020
Authors: D.I. Monastyrsky, O.N. Romanova, Yu.M. Berezhnoi
In recent years, special interest manifests itself in the synthesis and study of the properties of complex compounds of metals and obtaining functional composite materials on their basis. [14-16]
Problem Statement
The main objective of this work is to identify the factors that affect granulometric composition of electrolytic powders, study of the mechanism the flow of electrolysis in the presence of water-soluble polymers, combined with using a vibrating cathode, the pulsed mode of electrolysis and the composition the electrolyte used.
A large number of combinations of different levels of these factors creates the problem of choice of optimal conditions of production of powders.
Further properties depend on its flow the resulting powders.
Gaspar, Steric stabilization of nanoparticles: size and surface properties.
Moscow, mechanical engineering 1971
A large number of combinations of different levels of these factors creates the problem of choice of optimal conditions of production of powders.
Further properties depend on its flow the resulting powders.
Gaspar, Steric stabilization of nanoparticles: size and surface properties.
Moscow, mechanical engineering 1971
Online since: April 2015
Authors: Nor Munirah Abdullah, Ramlah Mohd Tajuddin, Sharifah Abdullah
Since cellulose from different sources differs in properties (crystallinity, moisture content, surface area and porous structure, molecular weight, etc.) different properties of MCC obtained from different sources are expected.
The conditions of hydrolysis also affect the properties of the obtained MCC [11].
Kenaf Properties, Processing And Products.
Wilf, Membrane Types and Factors Affecting Membrane Performance.
Sain, Mechanical properties of biodegradable composites from poly lactic acid (PLA) and microcrystalline cellulose (MCC).
The conditions of hydrolysis also affect the properties of the obtained MCC [11].
Kenaf Properties, Processing And Products.
Wilf, Membrane Types and Factors Affecting Membrane Performance.
Sain, Mechanical properties of biodegradable composites from poly lactic acid (PLA) and microcrystalline cellulose (MCC).
Online since: July 2012
Authors: Yong Liu, Xiao Yong Pan, Guo Hong Yao, Ling Peng
The mechanical property, moisture permeability and thermal insulation of finished products depend on the size and dosage of foam particles and adhesive consumption.
It also has the good property of rigidness and tenacity.
And tensile test, moisture-permeability test and thermal conductivity test on samples produced had been conducted to study the law of influences of crushed foam particle size, waste PU foam and adhesive on the mechanical property, moisture permeability and thermal insulation.
Tensile test, moisture permeability test and conductivity factor test are proceeded respectively in accordance with the relevant standards for experiments specified in test standards GB/T 21558- 2008.
Tests indicated that performance of insulated sandwich panel is affected by size and dosage of foam particles and dilute strength of adhesive.
It also has the good property of rigidness and tenacity.
And tensile test, moisture-permeability test and thermal conductivity test on samples produced had been conducted to study the law of influences of crushed foam particle size, waste PU foam and adhesive on the mechanical property, moisture permeability and thermal insulation.
Tensile test, moisture permeability test and conductivity factor test are proceeded respectively in accordance with the relevant standards for experiments specified in test standards GB/T 21558- 2008.
Tests indicated that performance of insulated sandwich panel is affected by size and dosage of foam particles and dilute strength of adhesive.