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Online since: June 2013
Authors: Yong Ming Xing, Yan Ru Zhao, Heng Mao Niu
Besides the mix design, fiber distribution is another crucial factor for strain-hardening properties of ECC [5,6].
At the same time, the fresh properties reach the condition for a desirable plastic viscosity before the fiber addition.
Improved fiber distribution and mechanical properties of engineered cementitious composites by adjusting the mixing sequence.
A design approach for the mechanical properties of polypropylene discontinuous fiber reinforced cementitious composites by extrusion molding[J].
Flowability of fiber-reinforced concrete and its effect on the mechanical properties of the material[J].
At the same time, the fresh properties reach the condition for a desirable plastic viscosity before the fiber addition.
Improved fiber distribution and mechanical properties of engineered cementitious composites by adjusting the mixing sequence.
A design approach for the mechanical properties of polypropylene discontinuous fiber reinforced cementitious composites by extrusion molding[J].
Flowability of fiber-reinforced concrete and its effect on the mechanical properties of the material[J].
Online since: October 2011
Authors: Shih Hsien Chang, Kuo Tsung Huang, Cheng Liang, Shih Chin Lee
The experimental results indicated that Laves and δ precipitations obviously appeared within the grain boundary, under HIP treatment and lower solid-solution temperatures (940°C), which would result in poor mechanical properties.
Alloy 718 has been widely used in gas turbine and related aerospace applications due to its good mechanical properties and structure stability at elevated temperature [4,5].
The solid-solution and aging treatments would significantly affect the precipitations and properties of the alloy 718.
Increasing the precipitation amount of niobium will increase γ˝ precipitations which are advantageous to mechanical properties.
The optimal mechanical properties appeared in the A-S1020 specimens, it can increase tensile strength to 1331.53 MPa, and yield strength was 1201.63 MPa.
Alloy 718 has been widely used in gas turbine and related aerospace applications due to its good mechanical properties and structure stability at elevated temperature [4,5].
The solid-solution and aging treatments would significantly affect the precipitations and properties of the alloy 718.
Increasing the precipitation amount of niobium will increase γ˝ precipitations which are advantageous to mechanical properties.
The optimal mechanical properties appeared in the A-S1020 specimens, it can increase tensile strength to 1331.53 MPa, and yield strength was 1201.63 MPa.
Online since: July 2014
Authors: Xue Yong Xu, Sheng Jie Di, Zhi Gang Shan
Introduction
Values and vertical gradients of shear wave velocity (Vs) are important physical and mechanical properties of soils.
In addition, several geological investigations have recently used correlations between geological parameters and Vs in predicting the foundation properties [4].
The affecting factors mainly include the physical and mechanical properties of foundation soils, such as standard penetration test (SPT) number N, side friction fs of CPT, cone tip resistance qc of CPT, depth z, void ratio e, compression modulus Es, water content w, density ρ, specific gravity of soil grain Gs and type of soils T.
The affecting factors are defined as the input samples and the corresponding Vs as output samples.
Because the GRNN estimation model considering the comprehensive factors, the predicted results show good agreement with the actual values.
In addition, several geological investigations have recently used correlations between geological parameters and Vs in predicting the foundation properties [4].
The affecting factors mainly include the physical and mechanical properties of foundation soils, such as standard penetration test (SPT) number N, side friction fs of CPT, cone tip resistance qc of CPT, depth z, void ratio e, compression modulus Es, water content w, density ρ, specific gravity of soil grain Gs and type of soils T.
The affecting factors are defined as the input samples and the corresponding Vs as output samples.
Because the GRNN estimation model considering the comprehensive factors, the predicted results show good agreement with the actual values.
Online since: April 2020
Authors: Tibertius Agus Prayitno, Tamaryska Setyayunita, Ragil Widyorini, Erlina Nurul Aini
Besides the pressing method, other factors can affect particleboard properties.
Between the two factors used in this research, press temperature had more clear effect in thickness swelling and water absorption properties.
The increase in ester linkage that being formed positively influenced board mechanical properties [8, 10].
Each factor used in this research gave different effect to particleboard properties.
The addition of starch tended to negatively affect the physical properties of the boards, such as thickness swelling and water absorption but positively affected mechanical properties of the boards, such as internal bond strength and bending strength.
Between the two factors used in this research, press temperature had more clear effect in thickness swelling and water absorption properties.
The increase in ester linkage that being formed positively influenced board mechanical properties [8, 10].
Each factor used in this research gave different effect to particleboard properties.
The addition of starch tended to negatively affect the physical properties of the boards, such as thickness swelling and water absorption but positively affected mechanical properties of the boards, such as internal bond strength and bending strength.
Online since: January 2016
Authors: Maizlinda Izwana Idris, Hasan Zuhudi Abdullah, KANAGESWARY SOCKALINGAM, Hilary Nelson
Vast variations in extraction procedures affect the properties of fish gelatin such as yield and gel strength.
Gelling properties such as gel strength (bloom value) of the gelatin samples had been determined.
Nasri, Screening of factors influencing the extraction of gelatin from the skin of cuttlefish using supersaturated design, Food Res.
Prentice, Physical and chemical properties of wami tilapia skin gelatine, Food Sci.
Gómez-Guillén, Extracting Conditions for Megrim (Lepidorhombus boscii) Skin Collagen Affect Functional Properties of the Resulting Gelatin, Food Chem.
Gelling properties such as gel strength (bloom value) of the gelatin samples had been determined.
Nasri, Screening of factors influencing the extraction of gelatin from the skin of cuttlefish using supersaturated design, Food Res.
Prentice, Physical and chemical properties of wami tilapia skin gelatine, Food Sci.
Gómez-Guillén, Extracting Conditions for Megrim (Lepidorhombus boscii) Skin Collagen Affect Functional Properties of the Resulting Gelatin, Food Chem.
Online since: May 2013
Authors: Juan Wang, Da Li, Si Yu Lai
The moisture absorption mechanism differs in varied conditions of heat and humidity, and temperature is an important factor affecting composites hygroscopic property.
Introduction Reinforced Carbon fiber resin matrix composites enjoy properties of light weight, high strength, corrosion resistance and controllable anisotropy [1], which are in line with the light trend for parts in aerospace, auto and sporting goods industry, so it has been widely applied in these fields [2].
Though moisture absorption affects longitudinal mechanics performance slightly in unidirectional composite, affects performances on compressive strength and inter-level shear strength seriously [4].
It can also be seen from Table 2 that the balanced hygroscopic content of composite in CT & CH is higher than that in VT & CH, which indicates that temperature is the key factor to influence hygroscopic property while the water diffusion coefficient in VT & CH is far below that in CT & CH, which proves that temperature plays important role in affecting water diffusion in composites.
Mechanical, Surface and Interfacial Characterization of Pitch and PAN-based Carbon Fibers [J].
Introduction Reinforced Carbon fiber resin matrix composites enjoy properties of light weight, high strength, corrosion resistance and controllable anisotropy [1], which are in line with the light trend for parts in aerospace, auto and sporting goods industry, so it has been widely applied in these fields [2].
Though moisture absorption affects longitudinal mechanics performance slightly in unidirectional composite, affects performances on compressive strength and inter-level shear strength seriously [4].
It can also be seen from Table 2 that the balanced hygroscopic content of composite in CT & CH is higher than that in VT & CH, which indicates that temperature is the key factor to influence hygroscopic property while the water diffusion coefficient in VT & CH is far below that in CT & CH, which proves that temperature plays important role in affecting water diffusion in composites.
Mechanical, Surface and Interfacial Characterization of Pitch and PAN-based Carbon Fibers [J].
Online since: May 2020
Authors: Wei Yu, Shi Kang Lu, Yu Lai Chen
And the mechanical properties were measured.
The microstructure and mechanical properties canimprove during this process.
In medium carbon ferritic-pearlite steels, the pearlite morphology has a great impact on the final mechanical properties.
The influence factors of precipitation strengthening are mainly the particle size and volume fraction of precipitates.
The measured microstructural parameters and mechanical properties are listed in Table 2.
The microstructure and mechanical properties canimprove during this process.
In medium carbon ferritic-pearlite steels, the pearlite morphology has a great impact on the final mechanical properties.
The influence factors of precipitation strengthening are mainly the particle size and volume fraction of precipitates.
The measured microstructural parameters and mechanical properties are listed in Table 2.
Online since: July 2011
Authors: Tadafumi Adschiri, Yao Yao Ding, Garry A. Williams, Karen E. Callon, Maureen Watson, Dorit Naot, Jessica L. Costa, Ian R. Reid, Jillian Cornish
Abstract: Indentation is a mature technique that has been widely used in materials science to investigate the mechanical properties of metals and thin films.
A more traditional engineering approach for mechanical properties is three point bend testing which provides an indication of the general fracture performance of the material.
Similar to the three point bend test, this technique probes bone properties in function of combined factors, such as collagen fibre orientation, mineralization and distribution (Rho, Zioupos et al. 1999).
"Anistropic properties of human tibial cortical bone as measured by nanoindentation."
"Mechanical properties in long bones of rat osteopetrotic mutations."
A more traditional engineering approach for mechanical properties is three point bend testing which provides an indication of the general fracture performance of the material.
Similar to the three point bend test, this technique probes bone properties in function of combined factors, such as collagen fibre orientation, mineralization and distribution (Rho, Zioupos et al. 1999).
"Anistropic properties of human tibial cortical bone as measured by nanoindentation."
"Mechanical properties in long bones of rat osteopetrotic mutations."
Online since: December 2012
Authors: Jian Han, Xiao Huan Zhang, Gui Hua Chen
Effects of the pH value of addition stage, the pH value and the temperature of polycondensation stage on the properties of the resin were analyzed.
In the synthesis of urea-formaldehyde resin adhesive, the pH of the addition stage, the pH and temperature of polycondensation stage are important factors that affect the resin synthesis, while it plays a decisive role in the structure of the main product of the various stages, quality and performance of resins [2].
In this paper, above factors are studied on the basis of improvements of urea-formaldehyde resin formulation[3], the optimum process are selected, the free formaldehyde content are further reduce.
Instrument: 6511 electric mixer LND-1 paint-4 coating viscometer Y33-50 500KN hot press, MWD-50 Mechanical Tester.
Each factor was taken three levels and L9 (34) orthogonal scheme was used for the test.
In the synthesis of urea-formaldehyde resin adhesive, the pH of the addition stage, the pH and temperature of polycondensation stage are important factors that affect the resin synthesis, while it plays a decisive role in the structure of the main product of the various stages, quality and performance of resins [2].
In this paper, above factors are studied on the basis of improvements of urea-formaldehyde resin formulation[3], the optimum process are selected, the free formaldehyde content are further reduce.
Instrument: 6511 electric mixer LND-1 paint-4 coating viscometer Y33-50 500KN hot press, MWD-50 Mechanical Tester.
Each factor was taken three levels and L9 (34) orthogonal scheme was used for the test.
Online since: July 2019
Authors: Stefania Franchitti, Carmine Pirozzi, Angela Ferrigno, Rosario Borrelli
In order to study the influence of orientation and location in the build chamber on such properties several specimens were EBM manufactured with different growing direction.
All the specimens were scaled according to the ARCAM recommended scale factors (1.0092 for x and y direction and 1.0132 for z direction) in order to take into account for the thermal shrinkage occurring after the melting.
For this type of surfaces adhesive properties are guaranteed and painting and bonding processes are supported, on the contrary, for application requiring hydrophobic properties, post processing activities are necessary to reduce the high level of roughness.
Molinari, Microstructure and mechanical properties of Ti-6Al-4V produced by electron beam melting of pre-alloyed powders, Rapid Prototyping Journal 15 (2009) 171–178
Argenio, Study on the Factors Affecting the Mechanical Behavior of Electron Beam Melted Ti6Al4V, Journal of Materials Engineering and Performance 26 Issue 9 (2017), 4491-4499, DOI 10.1007/s11665-017-2894-1
All the specimens were scaled according to the ARCAM recommended scale factors (1.0092 for x and y direction and 1.0132 for z direction) in order to take into account for the thermal shrinkage occurring after the melting.
For this type of surfaces adhesive properties are guaranteed and painting and bonding processes are supported, on the contrary, for application requiring hydrophobic properties, post processing activities are necessary to reduce the high level of roughness.
Molinari, Microstructure and mechanical properties of Ti-6Al-4V produced by electron beam melting of pre-alloyed powders, Rapid Prototyping Journal 15 (2009) 171–178
Argenio, Study on the Factors Affecting the Mechanical Behavior of Electron Beam Melted Ti6Al4V, Journal of Materials Engineering and Performance 26 Issue 9 (2017), 4491-4499, DOI 10.1007/s11665-017-2894-1