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A Model Construction about Predicting the Rate of Dimensional Change after Wash of Fabric Composites
Online since: September 2011
Authors: Jing Wang, Jin Ying Song, Ai Qing Tang
The mechanical properties of the fabrics and fused interlinings were tested in FAST system and KES system and the parameters of fabrics and interlinings are analyzed by a objective mathematic method.
Introduction The rate of dimensional change are the key factors in the apparel accessories and play important roles in the garments quality.
It will affect the use value of garments to a great extent.
The mechanical properties of the fabrics and fused interlinings were tested in FAST system and KES system.
In general, the the rate of dimensional change after wash is closely related to the material properties under the correct pressing condition.
Introduction The rate of dimensional change are the key factors in the apparel accessories and play important roles in the garments quality.
It will affect the use value of garments to a great extent.
The mechanical properties of the fabrics and fused interlinings were tested in FAST system and KES system.
In general, the the rate of dimensional change after wash is closely related to the material properties under the correct pressing condition.
Online since: July 2011
Authors: Yan Peng, Bo Ma, Jian Liang Sun, Hong Min Liu, Su Wen Chen, Bin Bin Sun, Gang Liu
Based on FEM, the three dimensional thermal mechanical coupled model of shell ring rolling process was built in this paper.
The influences of process parameters on the stress field, strain field and mechanical parameters were investigated.
Then, the thermal mechanical simulation of heavy shell ring rolling was made based on explicit dynamic FEM.
The heavy shell ring rolling process is three-dimensional, continuous, gradient, very complex plastic working process affected by many influencing factors.
The key problems such as geometric model building, material property and thermal boundary were solved
The influences of process parameters on the stress field, strain field and mechanical parameters were investigated.
Then, the thermal mechanical simulation of heavy shell ring rolling was made based on explicit dynamic FEM.
The heavy shell ring rolling process is three-dimensional, continuous, gradient, very complex plastic working process affected by many influencing factors.
The key problems such as geometric model building, material property and thermal boundary were solved
Online since: November 2006
Authors: C.P. Bergmann, S.R. Bragança
This property is a critical parameter
for the application of this product.
There seems to be a need for a fast control and measurement of the properties of this conventional triaxial porcelain.
The critical stress intensity factor or fracture toughness of a material, KIc, that leads to catastrophic failure is given by equation 5.
Therefore, in porcelain of low content of alumina (25%) changing alumina particle size did not affect hardness.
Wachtman, Mechanical properties of ceramics.
There seems to be a need for a fast control and measurement of the properties of this conventional triaxial porcelain.
The critical stress intensity factor or fracture toughness of a material, KIc, that leads to catastrophic failure is given by equation 5.
Therefore, in porcelain of low content of alumina (25%) changing alumina particle size did not affect hardness.
Wachtman, Mechanical properties of ceramics.
Online since: April 2009
Authors: Sergiy V. Divinski
Severe plastic deformation produces a broad
spectrum of high-angle grain boundaries (GBs) with different kinetic properties.
The resulting hierarchy of internal interfaces turned out to affect strongly the kinetic properties of the nanostructured material.
Severe plastic deformation The severe plastic deformation (SPD) processes have been studied extensively due to their potential to produce full density fine grained structures with attractive and rather unusual mechanical properties [3, 30].
The kinetic properties of SPD materials would strongly be affected by these 'non-equilibrium' GBs.
The SMAT enhances mechanical and tribological properties of the surface layer in different materials.
The resulting hierarchy of internal interfaces turned out to affect strongly the kinetic properties of the nanostructured material.
Severe plastic deformation The severe plastic deformation (SPD) processes have been studied extensively due to their potential to produce full density fine grained structures with attractive and rather unusual mechanical properties [3, 30].
The kinetic properties of SPD materials would strongly be affected by these 'non-equilibrium' GBs.
The SMAT enhances mechanical and tribological properties of the surface layer in different materials.
Online since: January 2015
Authors: Yang Yu, Xue Hua Cheng, Tao Wu, Xiu Lan Xin, Xiao Yan Yu
Moreover, the relationship between structure and properties and application of PUA core-shell hybrid emulsion in inks are also put forward in detail.
On the contrary, PA resins possess superior wearing resistance, adjustable mechanical properties and low cost[1-2].
Therefore, it is necessary that the combination of PU and PA resins to achieve excellent properties of hybrid emulsions.
PUA Core-Shell Emulsion Polymerization The forming course of core-shell hybrid emulsions that involve the preparation of PU dispersion and pre-emulsification of monomer, is affected by many factors such as reaction time, temperature, monomer content, initiator concentration etc.
G.Q.Fei et al.[12]discussed the modification of PUA hybrid emulsion with epoxy via in situ surfactant-Free polymerization and studied the mechanical and cohesive properties along with the content variation of E-44.
On the contrary, PA resins possess superior wearing resistance, adjustable mechanical properties and low cost[1-2].
Therefore, it is necessary that the combination of PU and PA resins to achieve excellent properties of hybrid emulsions.
PUA Core-Shell Emulsion Polymerization The forming course of core-shell hybrid emulsions that involve the preparation of PU dispersion and pre-emulsification of monomer, is affected by many factors such as reaction time, temperature, monomer content, initiator concentration etc.
G.Q.Fei et al.[12]discussed the modification of PUA hybrid emulsion with epoxy via in situ surfactant-Free polymerization and studied the mechanical and cohesive properties along with the content variation of E-44.
Online since: May 2014
Authors: David Bryan
Mechanical properties for common titanium alloys at 5.1-10.2 cm (2-4 in) diameter.
As such, the mechanical properties are dominated by the alpha phase.
This is supported by the mechanical properties in Table 2.
Rosenberg, The effect of oxygen on the mechanical properties of a BCC titanium alloy, PhD thesis, MIT (1972)
Jiang, Effect of c/a axial ratio on Schmid factors in hexagonal close-packed metals, Scripta Mat. 68 (2013) 530-533
As such, the mechanical properties are dominated by the alpha phase.
This is supported by the mechanical properties in Table 2.
Rosenberg, The effect of oxygen on the mechanical properties of a BCC titanium alloy, PhD thesis, MIT (1972)
Jiang, Effect of c/a axial ratio on Schmid factors in hexagonal close-packed metals, Scripta Mat. 68 (2013) 530-533
Online since: October 2010
Authors: Jing Cao, Yong Feng Wang, Chun Xue Wei
Effect of the size of powder on the Microstructures and Grain Refining Performance of AlTiC alloys
CAO Jing1, a, Yongfeng Wang2,b and Chunxue Wei3,c
1,2Department of Mechanical Engineering, Xi’an Aero technical College Xi’an China 710077
3HeNan Industry Design School , Zhengzhou China 450002
amsjingcao@163.com, bwangyfeng@163.com, c weichx060820@163.com
Key words: AlTiC;Al3Ti;TiC;grain refiner;refinement mechanism;master alloy
Abstract.
As a result, the change in morphology and distribution of TiC and Al3Ti particle has considerably affected the gain refining performance of AlTiC master alloys.
Introduction In the industrial production of Al, grain refiner is often added to liquid Al to improve the microstructure of Al, because the grain refiner can improve the mechanical properties, reduce ingot hot tearing tendency, increase casting speed, improve feeding performance and reduce loose tissue, improve the uniformity of the organization and the subsequent processing performance of Al[1].particularly for the rolled state or extruded Al, the ingot structure is refined to significantly reduce distortion products surface defects and improve the surface quality[2].
AlTiC master alloys have been prepared by contact reaction method, but the author found that the grain size of Ti and C powder obviously affected the refinement of AlTiC master alloys Experimental Methods Experimental Materials Experimental Materials:industrial Al,Al powder,Ti powder,C powder, concrete parameter was shown in Table 1: Table 1 material form Element types Purity Material Shape Particle size[mesh] Al block 99.70% Ingot Al powder 99.60% Ball 200 Ti powder 99.30% Ball 200、500 C powder 99.85% Flake 170、1200 Experiment instrument pit resistance furnace (Maximum temperature 1100)、press (model:AG-10TA)、the electron balance (precision 0.001g)、high speed planet type ball mill (model:Pulaerisette-5)、air blower、graphite crusher、iron rod、iron clamp、copper pouring injection molding and so on.
(4)Comprehensive view of all factors, when there is Al powder (200 mesh), Ti powder (500 mesh), C powder (1200 mesh), the refinement of the master alloys is the best.
As a result, the change in morphology and distribution of TiC and Al3Ti particle has considerably affected the gain refining performance of AlTiC master alloys.
Introduction In the industrial production of Al, grain refiner is often added to liquid Al to improve the microstructure of Al, because the grain refiner can improve the mechanical properties, reduce ingot hot tearing tendency, increase casting speed, improve feeding performance and reduce loose tissue, improve the uniformity of the organization and the subsequent processing performance of Al[1].particularly for the rolled state or extruded Al, the ingot structure is refined to significantly reduce distortion products surface defects and improve the surface quality[2].
AlTiC master alloys have been prepared by contact reaction method, but the author found that the grain size of Ti and C powder obviously affected the refinement of AlTiC master alloys Experimental Methods Experimental Materials Experimental Materials:industrial Al,Al powder,Ti powder,C powder, concrete parameter was shown in Table 1: Table 1 material form Element types Purity Material Shape Particle size[mesh] Al block 99.70% Ingot Al powder 99.60% Ball 200 Ti powder 99.30% Ball 200、500 C powder 99.85% Flake 170、1200 Experiment instrument pit resistance furnace (Maximum temperature 1100)、press (model:AG-10TA)、the electron balance (precision 0.001g)、high speed planet type ball mill (model:Pulaerisette-5)、air blower、graphite crusher、iron rod、iron clamp、copper pouring injection molding and so on.
(4)Comprehensive view of all factors, when there is Al powder (200 mesh), Ti powder (500 mesh), C powder (1200 mesh), the refinement of the master alloys is the best.
Online since: September 2013
Authors: Milan Prokolab, Ana Alil, Bojan Gligorijevic, Marina Kutin, Marko Ristic
This paper analysis the cause’s dynamically loaded screws failure, using the structural analysis of mechanical properties and numerical simulation.
Fracture, which is a most severe form of material damage, is under influence of numerous factors, such as: mechanical stresses, temperature, composition and properties of atmosphere, shapes and dimensions of a part or construction; structure and properties of material and quality of surface [1-5].
Next, investigation of mechanical properties of materials screws (yield stress, tensile strength, elongation, hardness and contraction of cross section) was done.
The as-received screws were probably in rolled and quenched and tempered condition according to structure and mechanical properties (Table 2).
It is considered the information about presence of impurities, microcavities, microcracks, primary and secondary structure and mechanical properties.
Fracture, which is a most severe form of material damage, is under influence of numerous factors, such as: mechanical stresses, temperature, composition and properties of atmosphere, shapes and dimensions of a part or construction; structure and properties of material and quality of surface [1-5].
Next, investigation of mechanical properties of materials screws (yield stress, tensile strength, elongation, hardness and contraction of cross section) was done.
The as-received screws were probably in rolled and quenched and tempered condition according to structure and mechanical properties (Table 2).
It is considered the information about presence of impurities, microcavities, microcracks, primary and secondary structure and mechanical properties.
Online since: June 2013
Authors: Lesia Maistrenko, Olga Andreyeva, Yuriy Fordzyun
Moreover, such factors as world economy agglomeration, liberal requirements to commercial product and informational globalization facilitate the process.
Therefore, based on the key role of the consumer in market relations, the problem of an objective evaluation of the performance properties of the materials that come in direct contact with human body and that may affect feel-good factor, physiological condition and health of a person.
It was found that the dominant factor in the assessment of ergonomic properties of shoes is human mental comfort or discomfort, which is determined on the basis of respondent’s organoleptic perception.
Based on Rehbinder Theory the following assumptions were made for the type of secreted moisture binding with the material of inside space of a shoe when wearing (for example, everyday low shoes) in closed rooms: in comfortable conditions moisture remains in physic-chemical bond with inside materials (lining and insole) of shoes; in discomfort environment created by intense sweating (humidity increases up to 75 %), moisture forms physical-chemical bond with shoe materials with excessive moisture content, affecting hygienic properties of shoes and consumer’s sensations.
It is shown that, according to consumer’s subjective feelings (psychological comfort or discomfort in wearing shoes) conditioned by objective ambient factors such as environmental conditions (temperature, humidity, etc.), the hygienic properties of shoes and materials the shoes made of, play a special role.
Therefore, based on the key role of the consumer in market relations, the problem of an objective evaluation of the performance properties of the materials that come in direct contact with human body and that may affect feel-good factor, physiological condition and health of a person.
It was found that the dominant factor in the assessment of ergonomic properties of shoes is human mental comfort or discomfort, which is determined on the basis of respondent’s organoleptic perception.
Based on Rehbinder Theory the following assumptions were made for the type of secreted moisture binding with the material of inside space of a shoe when wearing (for example, everyday low shoes) in closed rooms: in comfortable conditions moisture remains in physic-chemical bond with inside materials (lining and insole) of shoes; in discomfort environment created by intense sweating (humidity increases up to 75 %), moisture forms physical-chemical bond with shoe materials with excessive moisture content, affecting hygienic properties of shoes and consumer’s sensations.
It is shown that, according to consumer’s subjective feelings (psychological comfort or discomfort in wearing shoes) conditioned by objective ambient factors such as environmental conditions (temperature, humidity, etc.), the hygienic properties of shoes and materials the shoes made of, play a special role.
Online since: August 2022
Authors: Grace Anne P. Alcantara, Joel Padilla Rivadeneira, Prince Joseph V. Gaban, Katherine Ann T. Castillo-Israel
The extraction time and temperature were the variables used in this study because previous related studies identified them to be significant factors during the extraction of pectin from citron and banana peel [15, 16].
In terms of the effect of factors, both the extraction temperature and extraction time significantly (p<0.05) affected the pectin yield and its corresponding EW.
Consequently, it also reduced its molecular weight, affecting its gelling ability due to a decrease in the number of methyl groups [28].
Similar to AC, AUA content can be related to the purity, DE and physical properties of the extracted pectin with higher AUA value having higher purity.
International Journal of Food Properties 7 (2004) 693-703
In terms of the effect of factors, both the extraction temperature and extraction time significantly (p<0.05) affected the pectin yield and its corresponding EW.
Consequently, it also reduced its molecular weight, affecting its gelling ability due to a decrease in the number of methyl groups [28].
Similar to AC, AUA content can be related to the purity, DE and physical properties of the extracted pectin with higher AUA value having higher purity.
International Journal of Food Properties 7 (2004) 693-703