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Online since: August 2014
Authors: Zhe He Yao, Hao Yan Wang, De Qing Mei
Among these processes, the micro/meso forming has the advantages of high productivity, minimal or zero loss of material and the excellent mechanical properties for the final products, etc.
At the same time, dynamic instability and process conditions have become a non-negligible factor.
Based on lots of experiments, it can be concluded that the physical and mechanical properties of the material begin to show variable laws compared with macroscopic dimensions when the size of the specimen or the feature reaches millimeter or sub-millimeter, due to the size effects.
Typically, the size effect is not an independent phenomenon, but a phenomenon induced by a combined effect of various environmental factors and the material itself.
Chan: Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, Vol. 528 (2011), No. 13-14, pp. 4799-4806
At the same time, dynamic instability and process conditions have become a non-negligible factor.
Based on lots of experiments, it can be concluded that the physical and mechanical properties of the material begin to show variable laws compared with macroscopic dimensions when the size of the specimen or the feature reaches millimeter or sub-millimeter, due to the size effects.
Typically, the size effect is not an independent phenomenon, but a phenomenon induced by a combined effect of various environmental factors and the material itself.
Chan: Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, Vol. 528 (2011), No. 13-14, pp. 4799-4806
Online since: November 2014
Authors: Aleksander Karolczuk, Krzysztof Kluger, M. Prażmowski, Mateusz Kowalski
As a result of the explosion welding, residual stresses are generated in the cladded material which can affect the properties of the bimetallic composite.
One solution combining high strength, good corrosion resistance and a relatively low production cost is to use composite materials, which take advantage of joining a cheaper material of excellent mechanical properties with an expensive material with good protective properties [1-3].
As a result of the explosion welding, residual stresses are generated in the flyer material [4,5] which can affect the properties of the bimetallic composite.
The chemical composition of materials is shown in Table 1 while mechanical properties are presented in Table 2.
Mechanical properties of basic materials, as per the supplier's certificate.
One solution combining high strength, good corrosion resistance and a relatively low production cost is to use composite materials, which take advantage of joining a cheaper material of excellent mechanical properties with an expensive material with good protective properties [1-3].
As a result of the explosion welding, residual stresses are generated in the flyer material [4,5] which can affect the properties of the bimetallic composite.
The chemical composition of materials is shown in Table 1 while mechanical properties are presented in Table 2.
Mechanical properties of basic materials, as per the supplier's certificate.
Online since: March 2022
Authors: Abdul Aziz, Tsuyoshi Furushima, Tetsuhide Shimizu, Ming Yang
Kengo Yoshida et al. [9] found that grain size (Dg) is an important factor that affect to surface roughening.
MPT is the dominant factor that affect to the grain strength in SUS 304 thin foil.
Three kinds of influential factors have an important role on clarifying the Ra mechanism in this research.
The effect of Cold Work on Structure and Properties of AISI 304 Stainless Steel.
Constitutive modeling of TRIP steel and its application to the improvement of mechanical properties.
MPT is the dominant factor that affect to the grain strength in SUS 304 thin foil.
Three kinds of influential factors have an important role on clarifying the Ra mechanism in this research.
The effect of Cold Work on Structure and Properties of AISI 304 Stainless Steel.
Constitutive modeling of TRIP steel and its application to the improvement of mechanical properties.
Online since: November 2005
Authors: Sang Yul Lee, Bo Young Lee, S.H. Lee, J.S. Kim
In Gas Metal Arc Welding (GMAW), electromagnetic force is one of the most important
factors that effects the metal transfer, short-circuit rate, spatter generation rate and mechanical
properties for welding metal.
This paper is for the purpose of discussing these factors.
However problems of extensive spattering in CO2 welding process had become an obstacle factor for efficient welding productivity.
In addition there is an electromagnetic force, which affects both directions [5].
The other is a pinch instability model, in this a cylinder of liquid phase is separated by a mechanical disturbance of a particular wave length which brings a wave motion phenomenon to the cylinder of liquid phase.
This paper is for the purpose of discussing these factors.
However problems of extensive spattering in CO2 welding process had become an obstacle factor for efficient welding productivity.
In addition there is an electromagnetic force, which affects both directions [5].
The other is a pinch instability model, in this a cylinder of liquid phase is separated by a mechanical disturbance of a particular wave length which brings a wave motion phenomenon to the cylinder of liquid phase.
Online since: May 2014
Authors: Ning Sun, Sheng Jun Liu, Ying Jie Ma, Jin Min Wei
Content-based 3D model retrieval uses the inherent property of 3D models as feature descriptors by comparing the similarity of feature to realize retrieval [2].
Finally, scaling factor of 3D models is calculated in order to obtain the normalization of volume.
Among them, S is scaling factor, F is a diagonal form of matrix, R is a rotation matrix, I is original coordinate of the model, C is center of mass [3].
The rotational matrix R is consist unit vectors of three characteristic root of the matrix M. (3) scaling transformation factor: in order to obtain the normalization of volume, we should calculate the scaling factor of 3D models.
As to different size and similar shape models can be transformed to the same size through scaling factor.
Finally, scaling factor of 3D models is calculated in order to obtain the normalization of volume.
Among them, S is scaling factor, F is a diagonal form of matrix, R is a rotation matrix, I is original coordinate of the model, C is center of mass [3].
The rotational matrix R is consist unit vectors of three characteristic root of the matrix M. (3) scaling transformation factor: in order to obtain the normalization of volume, we should calculate the scaling factor of 3D models.
As to different size and similar shape models can be transformed to the same size through scaling factor.
Online since: May 2015
Authors: Jozef Kúdela, Martina Štrbová, Daniela Tesařová
Introduction
The quality of wood surface treatment with coating materials depends on the structure and properties of the coating material used, on the structure and surface properties of the wood substrate and on the interactions between these two environments.
The concern is about interactions among unsaturated force fields across the phase boundary between wood and coating materials as well as about the effects of a number of secondary factors [1,2].
Therefore, the interactions of these coatings with wood, affecting their adhesion to wood are needed to recognize.
The data summarized in Table l demonstrate that the surface free energy values obtained did not only result from the wood surface properties but that they were also influenced by the chemical structure of the liquid standard used.
Blanchet, UV-waterborne polyurethane-acrylate nanocomposite coatings containing alumina and silica nanoparticles for wood: mechanical, optical, and thermal properties assessment, J.
The concern is about interactions among unsaturated force fields across the phase boundary between wood and coating materials as well as about the effects of a number of secondary factors [1,2].
Therefore, the interactions of these coatings with wood, affecting their adhesion to wood are needed to recognize.
The data summarized in Table l demonstrate that the surface free energy values obtained did not only result from the wood surface properties but that they were also influenced by the chemical structure of the liquid standard used.
Blanchet, UV-waterborne polyurethane-acrylate nanocomposite coatings containing alumina and silica nanoparticles for wood: mechanical, optical, and thermal properties assessment, J.
Online since: November 2019
Authors: Hussein Marey Mahmoud
In general, the stability of ancient plasters is substantially affected by several inducing factors.
As a further matter, excellent mechanical properties are produced by HAp-NPs.
The assessment methodology was based mainly on determining the inner matrix morphology, surface microtopography, BET surface area and the physical-mechanical properties of the tested samples.
In addition, the physical and mechanical properties were evaluated.
Carmona-Quiroga, Use of nanosilica-or nanolime-additioned TEOS to consolidate cementitious materials in heritage structures: Physical and mechanical properties of mortars, Cem.
As a further matter, excellent mechanical properties are produced by HAp-NPs.
The assessment methodology was based mainly on determining the inner matrix morphology, surface microtopography, BET surface area and the physical-mechanical properties of the tested samples.
In addition, the physical and mechanical properties were evaluated.
Carmona-Quiroga, Use of nanosilica-or nanolime-additioned TEOS to consolidate cementitious materials in heritage structures: Physical and mechanical properties of mortars, Cem.
Online since: December 2007
Authors: Rong Yuan Jou, Jui Chang Lin, Wei Shin Lin, King Sun Lee, Shih Miao Huang
This study utilized a practical test to explore various factors
on the quality of the carrier tape, such as the rotational speed of extruder screw motor and extrusion
mold; the negative pressure of extrusion mold; and the temperature of the extrusion mold.
These included elongation and durability properties.
This phenomena of periodical variation of the extrusion, and the size variation of the sheet and film is the major factor affecting product quality.
(c) Where the extruder screw has a revolution speed of 50rpm; shaft revolution is 7M/min; the SMT/SMD-carrier-tape specification AO is 1.382mm; BO is 2.238mm; KO is 1.354mm; thickness is 0.233mm; all of these factors fall within the upper and lower specification limits
Gevert, Effects of repeated extrusion on the properties and durability of rigid PVC scrap, Polymer Degradation and Stability, Vol.73 (2001), p.p.93-99 [3]R.
These included elongation and durability properties.
This phenomena of periodical variation of the extrusion, and the size variation of the sheet and film is the major factor affecting product quality.
(c) Where the extruder screw has a revolution speed of 50rpm; shaft revolution is 7M/min; the SMT/SMD-carrier-tape specification AO is 1.382mm; BO is 2.238mm; KO is 1.354mm; thickness is 0.233mm; all of these factors fall within the upper and lower specification limits
Gevert, Effects of repeated extrusion on the properties and durability of rigid PVC scrap, Polymer Degradation and Stability, Vol.73 (2001), p.p.93-99 [3]R.
Online since: October 2013
Authors: Yu Tao Ju, Qing Chun Zhou, Zhen Wei
The study of the adhesive surface between the HTPB and aluminum particles is very important for the research on overall mechanical properties of composite propellant.
For adhesive surface, these are the fracture strength and the critical energy release rate(CERR) values characterizing the surface properties.
Fig.1 The schematic diagram of DCB specimen The adhesive surface treatment is an important factor for affecting the quality of the adhesive, so the surfaces of DCB should be degreasing, mechanical treatment, chemical treatment, washed and dried to remove the grease and debris.
Root rotation affects both the compliance of the beam and the resulting values of GIC.
N is a correction factor to correct for stiffening by the presence of the end-blocks and the rotation of the block.
For adhesive surface, these are the fracture strength and the critical energy release rate(CERR) values characterizing the surface properties.
Fig.1 The schematic diagram of DCB specimen The adhesive surface treatment is an important factor for affecting the quality of the adhesive, so the surfaces of DCB should be degreasing, mechanical treatment, chemical treatment, washed and dried to remove the grease and debris.
Root rotation affects both the compliance of the beam and the resulting values of GIC.
N is a correction factor to correct for stiffening by the presence of the end-blocks and the rotation of the block.
Online since: January 2011
Authors: Wei Wei Shangguan, Rong Jun Zhao, Xian Bao Cheng
Nowadays there are two methods to evaluate the mechanical properties of wood fiber: extension test of single fiber and zero-span tensile technique.
The single fiber extension test is a direct method to measure the mechanical properties of fibers, but it has some obvious drawbacks, for instance, tedious, big workload, and just demonstrate the fiber’s own mechanical properties, can not reflect the bonding strength between fibers.
Later on the Akker’s group[1] studied the parameters affecting the test and proposed a model for it.
Recently, this efficient micromechanical test technology has been introduced into the research area of measuring the mechanical properties of wood cell wall.
Factors affecting Longitudinal Tensile Strength of Softwood Tracheids Investigated with Zero-span Tension.
The single fiber extension test is a direct method to measure the mechanical properties of fibers, but it has some obvious drawbacks, for instance, tedious, big workload, and just demonstrate the fiber’s own mechanical properties, can not reflect the bonding strength between fibers.
Later on the Akker’s group[1] studied the parameters affecting the test and proposed a model for it.
Recently, this efficient micromechanical test technology has been introduced into the research area of measuring the mechanical properties of wood cell wall.
Factors affecting Longitudinal Tensile Strength of Softwood Tracheids Investigated with Zero-span Tension.