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Thus, it is necessary to take into account the morphology and mechanical properties of the concrete material when building the mechanical model [6].
Meanwhile, the random probability distribution method is used to reflect the randomness of material properties in space, which can get more realistic mechanical behavior and properties.
A greater k value means the distribution of concrete mechanical properties more concentrated.
Accordingly, 8 concrete three-phase heterogeneous models are built, which can reflect the randomness of the mesoscopic structures with the same macroscopic mechanical properties.
The combination of above three effect factors is the most unfavorable to produce crack in the concrete interior.

But the increase ratio of mechanical properties was close.
And the lastest two factors, penetration of resin in wood issue, should be more cared about.
The adhesive penetration can change mechanical properties of the wood cell wall.
Probing the mechanical properties of the S2 layer and CCML in wood can lead to greater fundamental understanding of wood properties and penetration behaviour below the cellular level.
These reults prove PF affects the mechanical properties at the same depth from bond line.

Various factors can be summarized as three types [1]:  Geological factors, rock physical and mechanical property, rock mechanical property, crustal stress, surrounding rock stress, geological structure and so on. ‚ Engineering factors, tunnel sectional shapes and scale, its length and depth-span ratio and so on.ƒ Execution factors, tunnel execution schedule, engineer methods and supporting measures and so on.
Rock property and structure are primary factors of its stability.
Plastic surrounding rock includes various argillaceous rock, broken and friable rock and water-sucking expansive rock which have harmful properties such as fast weathering speed, low mechanical strength and softening, disintegration and expand when wet.
Mineral component, granules in content, water content, soluble salt and organic material content in weak interlayer is stated generally as the main factors which determined its property.
Besides, the fragment property and cement condition of fault materials affect rock stability.

The effects of three levels of two major controlling factors, the degree of polymerization of the activating solution (weight ratio of SiO2 to Na2O) of 0.4, 0.7 and 1.0 and the weight ratio of liquid to solid (L/S) of 0.7, 0.85 and 1.00 on the engineering properties of geopolymer are investigated.
The geopolymer has several attractive material properties like high compressive strength, good fire and acid resistance, etc. such that it gradually attracts more attention in recent years. [1-4] Previous studies showed that the ratio of liquid (alkaline solution) to solid (metakaolin) (RLS) by weight and the ratio of SiO2 to Na2O (RSN) by weight are two significant factors that affect the mechanical properties of geopolymer [5].
Xu et al indicated that the ratio of SiO2 to Na2O of activating solution by weight (RSN) affects the reaction of polymerization and its engineering properties and had a linear relationship with the amount of precipitation of aluminum and silica ions. [1] As the ratio of liquid to solid is increasing, the initial and final setting times of geopolymer paste are also increased.
Komnitsas et al. [6] indicates the hydroxide concentration is a vital factor to control the strength.
Table 1 Chemical compositions and physic properties of kaolin Chemical Physic SiO2 Al2O3 Fe2O3 Na2O TiO2 L.O.I.

These parameters can accurately affect the tensile properties of alumina fiber bundles.
Due to its excellent high temperature mechanical properties, chemical corrosion resistance, low thermal conductivity and electrical insulation, it can be widely used in alumina fiber reinforced aluminum matrix composites, it can be used in many fields such as sound insulation, aerospace, automobile, etc.
The presence of defects within the continuous alumina fibers [6], coupled with fluctuations in the production process during their preparation[7], has led to differences in their mechanical properties.
Properties and applications of alumina fibers.
[7] JOHNSON J W.Factors affecting the tensile breaking strength of carbon graphite fibers[J].

By obtaining the data of BR1500 HS isothermal tensile test, it established a "" shaped part of thermal-mechanical coupled model which is based on ABAQUS to analyze the influences of forming speed and holding time on the forming properties.
From the hot stamping process, the key factors affecting hot stamping performance are how to determine the appropriate speed and holding time.
Therefore, the study of these two key factors has important practical significance for the development of the hot forming process.
Because steel material mechanical properties are insensitive to the direction of rolling, the test does not involve that.
Investigation of the thermo-mechanical properties of hot stamping steels[J].

Finite Element Analysis on Thermal-stress in Lining Expansion Gap Setting Affects on 150t BOF Shell Xue Ping Ren1,a, Guang Kun Wang2,b 1Department of Mechanical Engineering Inner Mongolia University of Science & Technology Baotou, China 2Department of Mechanical Engineering Inner Mongolia University of Science & Technology Baotou, China arxp@imust.cn, bguangkun1986@163.com Keywords：Converter; Thermal-stress; Finite Element Analysis Abstract.
Converter body is the core device in oxygen converter, the thermal-stress is the major factor affecting the lifetime of the converter, ansys the stress level in different parts of the converter is essential to improve the converter life.
The thermal-stress BOF shell suffered when working is the main factors affecting the life of the furnace shell, the main factors affect the BOF shell stress level is static load, dynamic load and heat load, heat load in a dominant position in BOF total stress component.
Pure Penalty: (2) Augmented Lagrange: (3) Because of the existence of an additional factor, Augmented Lagrange becomes insensitive to Pure Penalty.
In front of carrying thermal-stress analysis, material properties in different part need to be defined, the involved physical include thermal expansivity, elasticity and poisson ratio of shell material, permanent layer and working layer refractory material, they can be determined by literature[2,3].

The average mechanical properties values in the center of the plate are listed in Table1for the L, LT orientations, respectively.
The microstructure structure differences through the rolled plate thickness, including grain properties, second-phase particles and texture[17], result in the differences in mechanical properties.
And the diversity of texture sorts and content which may affect the amount of activated slip systems (jmax) and the value of Schmid factor(mij), seems to be the key factor that leads to the variation of the tensile properties in different thickness layers.
All these factors contribute to poor fracture toughness in S-L orientation.
Ritchie, Mechanical properties of Al-Li alloys Part 1Fracure toughness and microstructure, Mater.

The material formed by a combination of TiC elements guarantees excellent mechanical properties.
It follows that the properties of sintered carbides are influenced by a number of factors [21,22].
Therefore, in practice, it is necessary to choose this base of influencing factors precisely in relation to the desired properties of sintered carbides.
Since the chemical composition of sintered carbides significantly affects their mechanical properties, research was conducted focused on this area.
One of the basic mechanical properties of cemented carbides is their hardness.

From this point of view the greatest interest is caused by the protective nanocomposite coatings having the high level of physical and mechanical properties such as the hardness, wear resistance, thermal stability, etc.
One of the factors leading to increase in parameter of a crystalline lattice is origin in coatings of residual internal stresses.
For a more accurate assessment of the contribution of the different factors on the magnitude of residual stresses it is necessary more detailed studies.
Researches of mechanical properties of glasses with Al-Si-N coatings showed that they have higher hardness and coefficient of elastic recovery in comparison with those for quartz glass without coatings.
The main factors affecting the mechanical properties are the crystallization of AlN and α-Si3N4 nanophases and the presence of high residual stresses in the II-AlSiN coating, due to the formation of a columnar structure.