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Online since: July 2011
Authors: Gary Savage, Michael Lee, Vu Thua Nguyen, Dag Mortensen, Hallvard Gustav Fjær, John F. Grandfield, Sébastien Dablement
The air gap formation due to metal shrinkage and mould deformation is the main factor which determines the heat extraction.
Operators of these machines are concerned with producing rod with the required properties, without defects and achieving good wheel and belt life.
Material properties Aluminium alloy 1350 was modelled.
The fluid properties published in [7] were applied.
The mechanical properties were taken from [8].The wheel and belt properties are given in Table 1.
Operators of these machines are concerned with producing rod with the required properties, without defects and achieving good wheel and belt life.
Material properties Aluminium alloy 1350 was modelled.
The fluid properties published in [7] were applied.
The mechanical properties were taken from [8].The wheel and belt properties are given in Table 1.
Online since: May 2020
Authors: V.V. Bazheryanu, A.G. Kim, I.V. Zaychenko
Regulation of Mechanical Properties of Advanced PCM Products with the Aid of Catalysts
I.V.
Recently, during manufacturing products from PCM, there are various ways to reduce the influence of these factors: assembly of parts by gluing together several prefabricated thin-walled parts, using double-sided heating during molding, controlling heating modes and time of the part exposure (step heating).
Therefore, the change in flexural strength allows us to estimate the effect of the temperature gradient on the mechanical properties of the matrix [2, 3,11].
Reducing the anisotropy of the physical-mechanical properties of the matrix helps to reduce internal stresses in parts made of PCM, also it reduces distortion of parts due to the effect of residual stresses.
Golovkin et al, Polymeric composite materials: structure, properties, technology: studies manual, St.
Recently, during manufacturing products from PCM, there are various ways to reduce the influence of these factors: assembly of parts by gluing together several prefabricated thin-walled parts, using double-sided heating during molding, controlling heating modes and time of the part exposure (step heating).
Therefore, the change in flexural strength allows us to estimate the effect of the temperature gradient on the mechanical properties of the matrix [2, 3,11].
Reducing the anisotropy of the physical-mechanical properties of the matrix helps to reduce internal stresses in parts made of PCM, also it reduces distortion of parts due to the effect of residual stresses.
Golovkin et al, Polymeric composite materials: structure, properties, technology: studies manual, St.
Online since: December 2011
Authors: Ying Huang, Li Yang Xie, Yi Chen Zhang, Shao Ni Sun
Optical Properties of Ta2O5/SiO2 Antireflection Coating System
Shaoni Sun 1, a, Liyang Xie 1, b, Yichen Zhang 1, c, Ying Huang 1, d
1School of Mechanical Engineering & Automation, Northeastern University, Shenyang, Liaoning, China, 110004
ashnisun@me.neu.edu.cn, bliyangxie@mail.neu.edu.cn, czyc@china.com, dyinghuang@mail.neu.edu.cn
Keywords: Ta2O5/SiO2 multi-layer, Antireflection coating, Optical properties, Technical study
Abstract.
Substrate temperature is an important factor affecting the refractive index, so it has great significance to control substrate temperature for improving of film’s density and refractive index.
O2 content greatly affects the refractive index of film.
Substrate temperature has much important influence on film’s optical properties.
Preparation and Optical Properties of SiO2 AR coating, Optical Technique. 2(2000)104-106
Substrate temperature is an important factor affecting the refractive index, so it has great significance to control substrate temperature for improving of film’s density and refractive index.
O2 content greatly affects the refractive index of film.
Substrate temperature has much important influence on film’s optical properties.
Preparation and Optical Properties of SiO2 AR coating, Optical Technique. 2(2000)104-106
Online since: May 2014
Authors: Xing Wang Wen, Hui Ling Liu, Jun Zhang, Di Wu
The glass-ceramics with Ak = 0.36 possessed the best physical and chemical properties.
In addition, the formed novel materials possessing attractive mechanical and chemical properties can be utilized extensively in the building industry[7].
Effect of Alkalinity on the Sewage Sludge Glass-ceramics Properties Various properties of the glass-ceramics with different alkalinity were summarized in Table 4.
It was the most crystalline phases conduced S2 to possess the best physical properties.
The produced glass-ceramics possessed excellent properties, which were more related to the amount and type of generated crystalline phases.
In addition, the formed novel materials possessing attractive mechanical and chemical properties can be utilized extensively in the building industry[7].
Effect of Alkalinity on the Sewage Sludge Glass-ceramics Properties Various properties of the glass-ceramics with different alkalinity were summarized in Table 4.
It was the most crystalline phases conduced S2 to possess the best physical properties.
The produced glass-ceramics possessed excellent properties, which were more related to the amount and type of generated crystalline phases.
Online since: July 2015
Authors: Lynda Amirouche, Zakia Sersour
Two main factors affect mechanical properties of eutectic Al–Si cast alloys: (i) their microstructure since it is strongly correlated to most of the alloys properties and (ii) the chemical composition since it determines microstructural features, such as the morphology of dendritic α-Al, as well as the one of other intermetallics which are present in the microstructure [2].
Thus, some mechanical properties are already present in these alloys at the as-cast state whereas, some others, are obtained after their heat treatments.
As mentioned above these Iron compounds are detrimental to the mechanical properties.
Mechanical Properties 4- An improvement of the microhardness was observed after the aging treatment, for the two groups of alloys.
[5] Yongjin Wang, Hengcheng Liao, Yuna Wu and Jian Yang, Effect of Si content on microstructure and mechanical properties of Al–Si–Mg alloys, Materials and Design, 53, (2014) 634–638
Thus, some mechanical properties are already present in these alloys at the as-cast state whereas, some others, are obtained after their heat treatments.
As mentioned above these Iron compounds are detrimental to the mechanical properties.
Mechanical Properties 4- An improvement of the microhardness was observed after the aging treatment, for the two groups of alloys.
[5] Yongjin Wang, Hengcheng Liao, Yuna Wu and Jian Yang, Effect of Si content on microstructure and mechanical properties of Al–Si–Mg alloys, Materials and Design, 53, (2014) 634–638
Online since: June 2016
Authors: Djoko Suharto, Satrio Wicaksono, Joko Wisnugroho, Mardjono Siswosuwarno
Material Properties
In order to predict the response of dynamic pile subjected to impact loading during pile driving process, material mechanical properties are needed as an input for the simulations.
The properties of the HAZ however, is unknown.
In this paper, Cowper-Symonds material model was used to predict the HAZ properties.
The mechanical properties of HAZ were successfully predicted using Micro Vickers Hardness test results.
Hall, Recommended Design Fatigue Factors for Reassessment of Piles Subjected to Dynamic Actions From Driving, J.
The properties of the HAZ however, is unknown.
In this paper, Cowper-Symonds material model was used to predict the HAZ properties.
The mechanical properties of HAZ were successfully predicted using Micro Vickers Hardness test results.
Hall, Recommended Design Fatigue Factors for Reassessment of Piles Subjected to Dynamic Actions From Driving, J.
Online since: February 2019
Authors: L.M. Vesova
The properties of cellular concrete depend on the formed cement matrix structure, the strength of the inter-pore partitions.
Concrete, despite its remarkable properties, has a number of significant drawbacks.
The composition of fiber foam concrete was optimized for which the ratio of three fractions of crushed slag is taken as the variable factors in the design of the experiment: Slag1 (0 to 0.63 mm), Slag21 (0.63 to 1.25 mm), Slag3 (1.25 to 2.5 mm), and as an optimization parameter - the strength of fibro-concrete to compression.
Makarichev, Cellular concrete (technology, properties and designs).
Martynenko, Influence of the Characteristics of the Interporous Partition on the Physicotechnical Properties of Cellular Concrete.
Concrete, despite its remarkable properties, has a number of significant drawbacks.
The composition of fiber foam concrete was optimized for which the ratio of three fractions of crushed slag is taken as the variable factors in the design of the experiment: Slag1 (0 to 0.63 mm), Slag21 (0.63 to 1.25 mm), Slag3 (1.25 to 2.5 mm), and as an optimization parameter - the strength of fibro-concrete to compression.
Makarichev, Cellular concrete (technology, properties and designs).
Martynenko, Influence of the Characteristics of the Interporous Partition on the Physicotechnical Properties of Cellular Concrete.
Online since: September 2011
Authors: Rui Zhang, Guang Ming Chen, Jian Qiao Li, Gui Fen Zhou, Shu Cai Xu
In order to study the pressure-sinkage characteristics, several experimental studies of the effect of the low gravity environment on soil properties have been performed.
The mechanical properties are list in Table 1.
Table 1 The mechanical properties of the sample soil (lunar soil simulant-1) Parameter Median diameter μm Bulk density g/cm3 d10 μm d30 μm d60 μm Cu Cc value 50 1.10~1.39 4.5 22 75 16.7 1.43 Two plates (45mm and 50mm in diameter) were used in the experiment.
Fig. 3 The mechanical model of soft soil in DEM Table 2 The mesoscopic parameters of soft soil in DEM Parameters value Density [g•cm-3] 2.7 Particle radius [mm] 1.5~2.5 Particle-particle contact normal stiffness [N•m−1] [N•m−1] 1.08×106 Particle-particle contact shear stiffness [N•m−1] 2.42×106 Damping normal factor 0.82 Damping shear factor 0.64 Friction factor 0.51 Normal contact-bond strength [N] 0.60 Shear contact-bond strength [N] 0.55 Base on the soil properties and pressure-sinkage curves in laboratory, the value of the DEM parameters were obtained.
The DEM parameters were obtained base on the soil properties and the pressure-sinkage relationship in laboratory test.
The mechanical properties are list in Table 1.
Table 1 The mechanical properties of the sample soil (lunar soil simulant-1) Parameter Median diameter μm Bulk density g/cm3 d10 μm d30 μm d60 μm Cu Cc value 50 1.10~1.39 4.5 22 75 16.7 1.43 Two plates (45mm and 50mm in diameter) were used in the experiment.
Fig. 3 The mechanical model of soft soil in DEM Table 2 The mesoscopic parameters of soft soil in DEM Parameters value Density [g•cm-3] 2.7 Particle radius [mm] 1.5~2.5 Particle-particle contact normal stiffness [N•m−1] [N•m−1] 1.08×106 Particle-particle contact shear stiffness [N•m−1] 2.42×106 Damping normal factor 0.82 Damping shear factor 0.64 Friction factor 0.51 Normal contact-bond strength [N] 0.60 Shear contact-bond strength [N] 0.55 Base on the soil properties and pressure-sinkage curves in laboratory, the value of the DEM parameters were obtained.
The DEM parameters were obtained base on the soil properties and the pressure-sinkage relationship in laboratory test.
Online since: November 2010
Authors: Yan Ju Wang, Gang Fang
While, the influencing factors on the forming load are analyzed.
In the train wheel forming process, the geometrical feature and size of the wheel will be deformed, and sufficient plastic deformation will be provided to ensure mechanical properties of the train wheel.
(1)535mm→(H)65mm→48mm (2) 535mm→(H)70mm→48mm Fig.8 Comparison of forging characteristics with different parameters Influence Factors on the Forming Load The finite element method on the analysis of train wheel forging process has been used by both domestic and foreign scholars as a more effective and more economical method [5,6].But many factors will affect the numerical simulation results, for example, the forming load.
Studying these factors and finding out the influence laws could improve the accuracy of the numerical simulation results.
l Many factors affect the numerical simulation results.
In the train wheel forming process, the geometrical feature and size of the wheel will be deformed, and sufficient plastic deformation will be provided to ensure mechanical properties of the train wheel.
(1)535mm→(H)65mm→48mm (2) 535mm→(H)70mm→48mm Fig.8 Comparison of forging characteristics with different parameters Influence Factors on the Forming Load The finite element method on the analysis of train wheel forging process has been used by both domestic and foreign scholars as a more effective and more economical method [5,6].But many factors will affect the numerical simulation results, for example, the forming load.
Studying these factors and finding out the influence laws could improve the accuracy of the numerical simulation results.
l Many factors affect the numerical simulation results.
Online since: May 2011
Authors: Zhi Bin Su, Sheng Nan Sun
According to the parameters of designed submerged floating tunnels at home and abroad, main factors that affect the dynamic response of submerged floating tunnel were analyzed by numerical method.
Effects of fctors on seismic response of submerged floating tunnel Mechanical property of submerged floating tunnel is affected by many factors.
The purpose of this paper is to reveal the relationship between factors and seismic response of submerged floating tunnel by analyzing the effects of several factors on the response of system, which may provide evidence to the optimization of the structural behavior.
In factor analysis, it is generally assumed that only one parameter of the structure change, the others remain unchanged.
Among factors that affect the internal force and deformation of submerged floating tunnel, tether spacing is very active.
Effects of fctors on seismic response of submerged floating tunnel Mechanical property of submerged floating tunnel is affected by many factors.
The purpose of this paper is to reveal the relationship between factors and seismic response of submerged floating tunnel by analyzing the effects of several factors on the response of system, which may provide evidence to the optimization of the structural behavior.
In factor analysis, it is generally assumed that only one parameter of the structure change, the others remain unchanged.
Among factors that affect the internal force and deformation of submerged floating tunnel, tether spacing is very active.