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Online since: September 2017
Authors: D.I. Kinzin, S.A. Levandovskiy, O.N. Tulupov
Moreover, a changed strain diagram – with higher roll pass design efficiency factor – will increase the roll out of foundry production defects.
Introduction Change of roll pass design can improve rolling conditions at the rolling mill – increase mill product mechanical properties, surface quality, rolling accuracy, reduce energy consumption, rolls inventory and consumption, etc. [1-6].
At the output from fourth and eight stands, new groove form has not affected maximum values of this parameter at the free surface of intermediate metal.
Improvement of PUF values is especially important when producing round bars in bundles, because there are strict requirements for their surface quality and mechanical properties, especially when testing on 66% sinking strain.
Ishmetyev, Structural-matrix models for long product rolling processes: modeling production traceability and forming consumer properties of products, Vestnik of Nosov Magnitogorsk State Technical University, 45(5) (2013) 46-50
Online since: April 2016
Authors: A. Zamani, M. Sabet, S.N. Hosseini, Z. Hosseini, H. Soleimani
Nano particles have the highest surface area to volume ratio with the lowest imperfection (fineness), and thus possess superior mechanical, chemical, physical and thermal properties.
Overall these properties make SiO2 a suitable candidate for wettability alteration in EOR [29].
Temperature effects on IFT is also one of the factors that should be considered.
Current review explores the factors impacting each one of the study cases.
On the other hand, any adjustment on one factor might affect the other factors, for instance in permeability studies it is showed that retention in narrow pore throats can reduce permeability.
Online since: October 2007
Authors: Jeong Min Kim, Joong Hwan Jun
The fluidity was a little increased by Sr additions but it was not affected by Ca additions.
Based on the castability tests, 2%Ca and/or 2%Sr were added to the Mg-6%Al-0.2%Mn alloy, and their effects on the microstructure and mechanical properties were investigated.
Introduction Although Mg-Al alloys offer a good combination of mechanical properties, castability, corrosion resistance, and cost, they are not suitable for being used at elevated temperatures due to the low thermal stability of Mg17Al12 phase formed in grain boundaries.
On the other hand, little change of tensile properties occurred by Sr addition alone.
The Sr addition was not found effective in enhancing the tensile properties of base alloy, either.
Online since: September 2014
Authors: Lai Xia Yang, Ying Bao Xue, Xue Gang Zhou, Rong Xia Chai
Factors affecting the size precision of sugar based rapid prototyping and bending strength Factors affecting the size precision of sugar based rapid prototyping: shrinkage, the machine parameters, and the error surface treatment production.
The material of shrinkage in the heating cooling, which is an essential property of material, but different material shrinkage is different.
In fact not only the size shrinkage and contraction properties of the material, but also on the processing conditions, and the forming of parts related to temperature changes.
Finally saying, this paper mainly research decided to sugar based rapid prototyping forming factors and the main factors affecting the sugar based rapid prototyping precision, laser power, scanning speed, powder layer thickness, scan spacing and preheating temperature.
The main factors affecting the SLS forming performance analysis Chinese Institute of mechanical engineering, [C].//2001 years and the ninth annual meeting of the special processing Symposium.2001:323-327, (in Chinese)
Online since: October 2010
Authors: Jin Xia Zhang, Shu Xian Liu, Fu Sheng Niu, Shan Shan Zhou
Its various physical and chemical properties was analysis, whose chemical composition was shown in Table 1.
Therefore, in this experiment, iron tailings were pretreated by a physical treatment, chemical excitation and combination of both, in order to enhance the capacity of tailings iron in response and improve the mechanical properties of products.
Discussing the main factors on affecting the compressive strength of inorganic polymers, such as tailings mass fraction of total solid phase, doped volume of liquid sodium silicate, solid-liquid ratio, curing period and cement content of slag.
However the strength of product would be lower, because if the curing time was too long, the product would have a gradual process of dissociation with the effect of external factors.
Conclusion In the other conditions unchanged, some important factors was discussed, which affected the compressive strength of geopolymer materials.
Online since: July 2016
Authors: Fu Tian Liu, Xue Ye Sui, Chang Xia Yin, Chong Hai Wang, Heng Chen, Chang Ling Zhou
Not only do they possess excellent mechanical property, but also ensure excellent heat-insulating property.
Three factors cause the heat-insulating property.
The mechanical properties of samples are shown in Table 2, Table 3 and Table 4.
Due to the porous structure, Al2O3-SiO2 aerogel is a kind of brittle materials and possesses poor mechanical properties which are virtually nil.
Using fibers as reinforcement is an effective method to enhance the mechanical properties.
Online since: August 2013
Authors: You Tang Li, Zhi Jia Sun
With the method, the change law of the crack path direction and the crack propagation rate by the influence of the MDZ macroscopic mechanical property is researched.
Fig.4 shows the mechanical property of the MDZ will influence the deflection angleof the crack path.
Fig. 6 shows that the mechanical property of the MDZ also influences the rate of crack propagation.
Summary The mechanical property of the material discontinuous zone will influence the propagation behavior of the crack placed in closed to it in matrix: (1)The crack propagation path will deviate toward the material discontinuous zone when the crack grows in closed to it.
Kang: Journal of Mechanical Strength, Vol.33(3) (2011), p.450 [6] Tanaka K.
Online since: September 2011
Authors: Hong Jun Li, Xu Pin Zhuang, Bo Wen Cheng, Xiao Ning Jiao, Lei Shi, Men Qin Li
Structure and properties.
Results and discussions Structure and physical properties analysis.
The nonwoven fabrics of different structure were designed and their physical and mechanical properties were listed in table 1.
The heat transfer mechanism is very complex, and the heat transfer directly affects the thermal conductivity, insulation, thermal resistance, and many other thermal properties of textiles.
The acoustic absorption properties of nonwoven fabrics are affected by the thickness of the material, air flow resistance, the structure factor, porosity, materials and finishes behind the air layer and other factors.
Online since: July 2015
Authors: Edson Paulo da Silva, Tadeu Castro da Silva, Daniel Monteiro Rosa
One of these parameters is the annealing, which affects the phase transformation temperatures and mechanical properties [5,6,7,8,9].
Ni-Ti alloys that are rich in Ni have their pseudoelastic properties enhanced when submitted to annealing thermal treatments at 350°C and increase driving force for Ti3Ni4 [4] precipitates.
Yao, Annealing Effect on the Shape Memory Properties of Amorphous NiTi Thin Films, Journal of Manufacturing Science and Engineering, 132 (2010), 051004-1- 051004-9
Tu, Factors Affecting Transformation Temperatures in Fe-Mn-Si-Cr-Ni Shape Memory Alloy, J.
Van Humbeeck, Effect of Annealing on the Transformation Behavior and Mechanical Properties of Two Nanostructured Ti-50.8at.
Online since: September 2013
Authors: Anna Marzo, Giuseppe Marghella, Maurizio Indirli
Most of the damages affecting ancient buildings are substantially due to the lack of connection between the perimeter walls and to the presence of heavy roofing with a rigid r.c. wall plate, often result of the traditional timber roofs replacement during restoration interventions.
Timber members have been investigated carrying out an in-depth visual survey and some non-destructive tests, in order to record useful information about defects, damages and decay situations, in addition to a preliminary evaluation of the mechanical properties of the structure.
Fig. 7. 3D views of the structural model In order to evaluate the bearing capacity of the structural system under the Ultimate Limit State and the seismic conditions, proper elements mechanical properties and load conditions have been considered.
Table 1: Load analysis Non Structural Dead Load (G2) Completion part Thickness [cm] Load [kN/m2] Planks 4 0.24 Tiles 2 0.40 Live load (Q1) Maintenance 0.50 Snow load (Q2) 1.60 The assumed mechanical properties are summarised in Table 2, where: γ is the mean value of wood density, E0 and E90 are the longitudinal and transversal moduli of elasticity; G0,90 and G90 are, respectively, the shear moduli in the parallel-perpendicular to grain planes and in transversal planes.
Table 2: Timber mechanical properties [9, 11] Species γ E0 E90 G0,90 G90 [kg/m3] [N/mm2] [N/mm2] Poplar 470 7000 464 438 156 Results.
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