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Online since: December 2013
Authors: Qing Qiu Kong, Guo Jun Ke, Dan Wang
Introduction
Glass, with stable properties, is difficult to degradation.
So, temperature and pressure were the important factors affecting structural stability of the glass.
Glass powder was irregular granular, sharp edged, presenting fracture morphology under mechanical damage.
[4] Li Guodong.The influence of structure factors on active activation of fly ash [J].
Pozzolanic properties of fine and coarse color-mixed glass cullet [J].
So, temperature and pressure were the important factors affecting structural stability of the glass.
Glass powder was irregular granular, sharp edged, presenting fracture morphology under mechanical damage.
[4] Li Guodong.The influence of structure factors on active activation of fly ash [J].
Pozzolanic properties of fine and coarse color-mixed glass cullet [J].
Online since: July 2018
Authors: Sergey V. Astafurov, Kamil Ramazanov, Galina Maier, Eugene V. Melnikov, Valentina A. Moskvina, Elena G. Astafurova
All these processes promote to surface hardening and improving tribological properties of ASS [1-5].
Pre-treatment (cold rolling and heat treatment) can significantly change properties of ASS [6].
All these factors influence the diffusion intensity under nitrogen/carbon saturation.
These factors testify to high internal stresses, microstrain of the crystal lattice and low-angle misorientations in structural elements.
Murr, Handbook of materials structures, properties, processing and performance, Springer, Berlin, 2015
Pre-treatment (cold rolling and heat treatment) can significantly change properties of ASS [6].
All these factors influence the diffusion intensity under nitrogen/carbon saturation.
These factors testify to high internal stresses, microstrain of the crystal lattice and low-angle misorientations in structural elements.
Murr, Handbook of materials structures, properties, processing and performance, Springer, Berlin, 2015
Online since: October 2010
Authors: Claudio Modena, Alessio Pipinato, Carlo Pellegrino
In the
aftermath of a damaging earthquake, many of these systems play a critical role for the emergency
response community and the community in general to save lives and prevent additional damage to
property (Schiff and Buckle 1995).
In particular from the structural point of view, damage could influence the dynamic response of a structure and, at the same time, changes in its behavior may be associated with the decay of the system's mechanical properties (Salawu 1997).
With regard to fatigue assessment of riveted historical metal bridges, many factors have found to play an important role, as documented by several studies (DiBattista, et al. 1997, Matar and Greiner 2006, Pipinato et al. 2009a, Pipinato et al. 2009b) and an accurate estimation of the stress variation by means of a detailed experimental approach or proper numerical analyses of the critical details is of key importance for a reliable estimation of the remaining fatigue life of the structure.
No alternative model has been realized computing for material degradation , e.g., reducing transversal section, as the visual inspection performed has considered this problem not affecting the structure.
The application of an assessment procedure to the Adige Bridge outlined some relevant issues: - the materials used in this quite old railway bridge have shown mechanical and chemical properties (strength, chemical composition) comparable to those provided by actual Eurocodes; - corrosion is a local phenomenon that does not necessarily play a relevant role on the global response of the bridge if section loss is less than 15%; - fatigue cracks, not discovered in this first phase assessment; - fatigue assessment concerning the remaining life could be performed using the Palmgren - Miner rule, accounting the possible traffic increase for the estimation of the residual lifetime: the result gives a reasonable and detailed estimation of safe exercise; - monitoring should be an option when the "calculated" fatigue safety is insufficient.
In particular from the structural point of view, damage could influence the dynamic response of a structure and, at the same time, changes in its behavior may be associated with the decay of the system's mechanical properties (Salawu 1997).
With regard to fatigue assessment of riveted historical metal bridges, many factors have found to play an important role, as documented by several studies (DiBattista, et al. 1997, Matar and Greiner 2006, Pipinato et al. 2009a, Pipinato et al. 2009b) and an accurate estimation of the stress variation by means of a detailed experimental approach or proper numerical analyses of the critical details is of key importance for a reliable estimation of the remaining fatigue life of the structure.
No alternative model has been realized computing for material degradation , e.g., reducing transversal section, as the visual inspection performed has considered this problem not affecting the structure.
The application of an assessment procedure to the Adige Bridge outlined some relevant issues: - the materials used in this quite old railway bridge have shown mechanical and chemical properties (strength, chemical composition) comparable to those provided by actual Eurocodes; - corrosion is a local phenomenon that does not necessarily play a relevant role on the global response of the bridge if section loss is less than 15%; - fatigue cracks, not discovered in this first phase assessment; - fatigue assessment concerning the remaining life could be performed using the Palmgren - Miner rule, accounting the possible traffic increase for the estimation of the residual lifetime: the result gives a reasonable and detailed estimation of safe exercise; - monitoring should be an option when the "calculated" fatigue safety is insufficient.
Online since: October 2016
Authors: Ranjana Das, Himadri Sekhar Samanta, Chiranjib Bhattacharjee
Biodegradation properties also help in controlled release of encapsulated growth factors, drugs, biomolecules and cells from the hydrogels which will help in enhancing the tissue regeneration.
Permeability Properties of Hydrogel.
The swelling characteristics are crucial to the use of hydrogels in biomedical and pharmaceutical applications since the equilibrium swelling ratio affects the solute diffusion coefficient, surface wettability and mobility and optical and mechanical properties of the hydrogel.
The swelling properties are determined by many factors, including the type and composition of monomers, crosslinking density and other environmental factors such as temperature, pH and ionic strength. [79].
Shibayama, Structure-mechanical property relationship of tough hydrogels, Soft Matter. 8(2012) 8030–8038
Permeability Properties of Hydrogel.
The swelling characteristics are crucial to the use of hydrogels in biomedical and pharmaceutical applications since the equilibrium swelling ratio affects the solute diffusion coefficient, surface wettability and mobility and optical and mechanical properties of the hydrogel.
The swelling properties are determined by many factors, including the type and composition of monomers, crosslinking density and other environmental factors such as temperature, pH and ionic strength. [79].
Shibayama, Structure-mechanical property relationship of tough hydrogels, Soft Matter. 8(2012) 8030–8038
Online since: May 2011
Authors: Shu Jiang Liu, Yan Fei Zhang
Introduction
Much attention has been devoted to glass-ceramic materials due to more excellent properties in the aspects such as thermal, mechanical, electric property and so on compared to their parent glasses.
The present work focuses on the effects of Ca-Mg substitution and P2O5 content on spontaneous crystallization and properties of the obtained glass-ceramics.
As for TGCs, size of crystalline particles and the difference in refractive index of crystals and residual glassy phase is both key factors for the transparency, generally the small particles size and refractive index difference favor good transparency[16].
In this work, crystalline, silicate- and phosphate-rich glassy phases coexist in the precursor glasses as well as glass-ceramics, this complicates the factors to affect the transparency.
The present work focuses on the effects of Ca-Mg substitution and P2O5 content on spontaneous crystallization and properties of the obtained glass-ceramics.
As for TGCs, size of crystalline particles and the difference in refractive index of crystals and residual glassy phase is both key factors for the transparency, generally the small particles size and refractive index difference favor good transparency[16].
In this work, crystalline, silicate- and phosphate-rich glassy phases coexist in the precursor glasses as well as glass-ceramics, this complicates the factors to affect the transparency.
Online since: June 2025
Authors: You Shen Cheng, Jian Long Syue, Hsin Chen Chiang, Huang Hsing Pan
Its chemical properties, analyzed according to ASTM C114, are shown in Table 1.
The properties of PZT are shown in Table 2.
Properties of PZT ceramic material Parameter Properties Electromechanical coupling coefficient, κt 0.62 Piezoelectric voltage constant, g33 (mV-m/N) 23.9 Piezoelectric strain constant, d33 (pC/N) 650 Acoustic impedance (106 kg/m2-s) 22.42 Mechanical quality factor, Qm 70 Relative permittivity, εr 3400 Curie temperature (°C) 220 Velocity, Vd (m/s) 2950 Specific gravity, g 7.6 Ethanol is commonly used to stop the hydration reaction of cement in cement-based materials.
Zhang, “Influence of polarization on properties of 0–3 cement-based PZT composites,” Cem.
Li, “Cement-based piezoelectric sensor for monitoring of highway traffic I: Basic properties,” J.
The properties of PZT are shown in Table 2.
Properties of PZT ceramic material Parameter Properties Electromechanical coupling coefficient, κt 0.62 Piezoelectric voltage constant, g33 (mV-m/N) 23.9 Piezoelectric strain constant, d33 (pC/N) 650 Acoustic impedance (106 kg/m2-s) 22.42 Mechanical quality factor, Qm 70 Relative permittivity, εr 3400 Curie temperature (°C) 220 Velocity, Vd (m/s) 2950 Specific gravity, g 7.6 Ethanol is commonly used to stop the hydration reaction of cement in cement-based materials.
Zhang, “Influence of polarization on properties of 0–3 cement-based PZT composites,” Cem.
Li, “Cement-based piezoelectric sensor for monitoring of highway traffic I: Basic properties,” J.
Online since: September 2013
Authors: Chang Meng Liu, Hong Min Sun, Miao Miao Liu, Xiao Xian He
Shaojun Ma, Hongfei Fu [7] extracted carotenoids from Sweet Orange peel, discussing the factors of ultrasonic method and mechanical stirring for the extraction.
Jin Zhang[12] found that pretreatment was also one of the key factors that affected the extraction ratio and purity.
Purification Commonly, carotenoids exist in Photosynthesis Pigment-Protein Complexes, which also contain Chlorophyll, having similar properties.
Yuanyuan Li [14] studied the factors of gardenia yellow pigment with ceramic membrane micro filtration under different pressure and pore size.
Study on the extraction of lycopene from tomato skin and its property[D].
Jin Zhang[12] found that pretreatment was also one of the key factors that affected the extraction ratio and purity.
Purification Commonly, carotenoids exist in Photosynthesis Pigment-Protein Complexes, which also contain Chlorophyll, having similar properties.
Yuanyuan Li [14] studied the factors of gardenia yellow pigment with ceramic membrane micro filtration under different pressure and pore size.
Study on the extraction of lycopene from tomato skin and its property[D].
Online since: August 2023
Authors: Naoki Kishi, Tetsuo Soga, Shunsuke Aiba, Mohd Faizal Achoi, Shinya Kato
Herein, the effect of anti-solvents on the surface morphology, structural properties and optical properties of CBI films as well as the solar cell performance to identify the suitable anti-solvent for CBI solar cell is described.
It means that the anti-solvents influence the absorption properties of CBI films.
The UV-vis absorption properties of CBI films fabricated with different anti-solvents.
The untreated sample shows poor morphology and low UV absorption properties.
Dai, “Air-stable layered bismuth-based perovskite-like materials: Structures and semiconductor properties”, J.
It means that the anti-solvents influence the absorption properties of CBI films.
The UV-vis absorption properties of CBI films fabricated with different anti-solvents.
The untreated sample shows poor morphology and low UV absorption properties.
Dai, “Air-stable layered bismuth-based perovskite-like materials: Structures and semiconductor properties”, J.
Online since: June 2021
Authors: An Qing Fu, Cheng Xian Yin, Yan Han, Jing Bin Luo
In this paper the failure reason of Q345R Welded Joint was studied through macroscopic observation, chemical properties, metallurgical analysis, scanning electron microscope (SEM) and EDS test method.
The existence of banded structure makes the structure of steel uneven, and affects the properties of steel, forming anisotropy and reducing the plasticity, impact toughness and section shrinkage of steel.
[2] Yan Han et al., Review of Sour Gas Field on Corrosion Factors and Development Progress[C] Advanced Materials Research. 201-203 (2011) 438-447
Research on Mechanical Property and HIC, SSC Test Analysis of L245NS Anti-sulfur Bending Pipe [J].
The existence of banded structure makes the structure of steel uneven, and affects the properties of steel, forming anisotropy and reducing the plasticity, impact toughness and section shrinkage of steel.
[2] Yan Han et al., Review of Sour Gas Field on Corrosion Factors and Development Progress[C] Advanced Materials Research. 201-203 (2011) 438-447
Research on Mechanical Property and HIC, SSC Test Analysis of L245NS Anti-sulfur Bending Pipe [J].
Online since: September 2013
Authors: Guo Ying Meng, Yao Hong Niu
Introduction
Permanent magnet coupling, also known as magnetic coupling,it is the device transmitting the torque form the motor to the load that is through the air gap between the permanent magnet, and it is transmission without mechanical connection between the motor and load.
The factors that directly affect the torque transmission has the gap size between copper plate and the aluminum plate, material parameters and characteristics of the permanent magnet, parameters and characteristics of copper plate,the rise or descent temperature , machining precision and accuracy of installation.
Permanent coupling basic structure is relatively simple, but the difference of various magnetic properties and magnetic media together with effect of transient for the eddy current as the relative motion of permanent magnet and the copper plate, that caused extremely complicated for the magnetic field distribution.
Transient contains two meanings, one is transient electromagnetic process, one is transient mechanical processes in three-dimensional magnetic field.
For the magnetic coupling structure , the performance analysis and optimization, and to determine the impact factor based on the simulation.
The factors that directly affect the torque transmission has the gap size between copper plate and the aluminum plate, material parameters and characteristics of the permanent magnet, parameters and characteristics of copper plate,the rise or descent temperature , machining precision and accuracy of installation.
Permanent coupling basic structure is relatively simple, but the difference of various magnetic properties and magnetic media together with effect of transient for the eddy current as the relative motion of permanent magnet and the copper plate, that caused extremely complicated for the magnetic field distribution.
Transient contains two meanings, one is transient electromagnetic process, one is transient mechanical processes in three-dimensional magnetic field.
For the magnetic coupling structure , the performance analysis and optimization, and to determine the impact factor based on the simulation.