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Simulation on Composition and Mechanical Properties of Concrete Mu Hui Jin The City College of Jilin Jianzhu University, Jilin Changchun 130111, China ccjjumhj@yeah.net Keywords: Concrete, Mechanical Properties, Numerical Simulation, Engineering Mechanics Abstract.
The mechanical properties of concrete and aggregate components only, with the ratio, the intensity level, reinforcement situation, but also on the specimen geometry and other factors are closely related.
Therefore, to accurately describe the true mechanical properties of concrete, the size effect on the mechanical properties of concrete systematic research is particularly necessary.
Development of bonding interface layer and hardened cement mortar matrix fracture directly affect the macroscopic mechanical properties of concrete.
Due to the size of the bonding interface layer is extremely small, very difficult test to test its mechanical properties.

Study on influencing factors of mechanical properties of Ti(C,N)-based cermets Yacong Chai1,a, Hanlian Liu1, b, Chuanzhen Huang1,c, Bin Zou1,d and Huahe Liu1,e 1Centre for Advanced Jet Engineering Technologies (CaJET), Key Laboratory of High-efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, 250061, China achaiyacong1989@163.com,blhl70@sdu.edu.cn,cchuanzhenh@sdu.edu.cn,dzb78@sdu.edu.cn, ehuahe.liu@163.com Keywords: Ti(C,N); mechanical properties; sintering process; initial powder size; binder content Abstract.
The content of Mo and Ni as binder phase affects the mechanical properties of cermets, but the view of addition amounts is different [6].
In addition, Zhan [7] has reported that initial powder size will also affect the mechanical properties and microstructure of materials.
Results and discussion Effect of sintering process on mechanical properties of Ti(C,N)-based cermets.
Table 3 Mechanical properties of Ti(C,N)-based cermets with different initial powder size Sample No.

The M/A constituent size such as mean diameter and length are important factors influencing Charpy impact properties of the simulated reheated CGHAZ.
M/A particle were main factors in increasing the hardness values in real and simulated IC CGHAZ.
The morphology of M/A constituent is one of the factors influencing impact fracture.
Lee, “Inoculated acicular ferrite microstructure and mechanical properties,” Materials Science and Engineering A, Vol. 319-321, 2001, pp. 326-331
Yang, “Challenge of mechanical properties of an acicular ferrite pipeline steel,” Materials Science and Engineering A, Vol. 431, 2006, pp. 41-52

When the slag content is 35%, the physical and mechanical properties of lightweight aggregate concrete small hollow block are the best, and all the indexes of physical and mechanical properties can meet the standard requirements non-bearing lightweight aggregate concrete hollow block.
By varying the content of slag, the effect of the amount of slag on the physical and mechanical properties of light aggregate concrete small hollow block were studied and then the amount of slag was determined to achieve the best physical and mechanical properties.
Table 1 Chemical composition Loss SiO2 Al2O3 CaO MgO P2O5 S MnO TiO2 FeO Fe2O3 SO3 0.07 36.42 10.05 41.62 8.77 0.036 0.88 0.14 0.36 0.40 0.21 0.05 Table 2 Physical properties Density Specific surface Fluidity ratio 7d activity index 28d activity index 2.9 421 100 70 101 Experimental method Design of experimental program Effect of slag which was used as admixture and it’s content on physical and mechanical properties of lightweight aggregate concrete small hollow blocks was investigated in this paper, therefore, we took the slag content as a major factor into consideration; in term of the lightweight concrete which contained mineral admixture, water binder ratio was an important factor which affecting the performance of lightweight concrete.
From the results of the above range and variance analysis, on the basis of following factors water binder ratio 0.39 and admixture dosage 1%(early strength agent)+3%(water reducing agent), the physical properties of 28d block with different slag content were further studied.
（3）Curing system of concrete small hollow block added with slag has important impact on its mechanical properties.

According to the factors which affected the properties of the composites, the orthogonal table of L9 (34) was adopted.
Table 1 Levels of Factors Levels Factors A B C D Mass fraction of fibers(%) Molding temperature(˚C) Molding pressure (MPa) Molding time (s) 1 10 170 8 360 2 20 180 10 480 3 30 190 12 600 Mechanical properties of the cotton stalk bast fibers reinforced PP Testing of flexural strength.
Mass fraction of fibers was the most important factor which affected the mechanical properties, especially the flexural strength and the tensile strength.
Molding temperature was a factor which affected the mechanical properties a lot.
Molding time was a factor which affected the mechanical properties a little.

The compaction curve of the ordinary fine sand is consistent with that of wind-blown sand and the main factors affecting the compaction properties are the grain composition, water content and compaction work.
This paper analyzes and compares the physical and mechanical properties of the wind-blown sands both in saturated and dried conditions, with which the influence of water content on the mechanical properties of the wind-blown sand is discussed.
physical Properties Grain Composition.
The compaction curves indicate that the crucial factors affecting the compaction mechanism are grain composition, water content and compaction work etc.
Compared the compaction curves, the crucial factors affecting the compaction mechanism are gradation, water content and compaction energy.

Through the orthogonal theoretical analysis, it is found that the sequence of the effect of parameters on the mechanical property is: Cooling rate > Heating temperature > Finish cooling temperature > Finish rolling temperature, the cooling rate is the most important factor affecting the inspection target and possesses a great influence on the hardness of the pipeline steel.
The thermo-mechanical control process (TMCP), which determines the microstructures and the mechanical properties, is the critical step to produce the high performance pipeline steel Cooling process after rolling was studied by Wang [3], and effect of finishing temperature and cooling rate on microstructure and properties of pipeline was studied by Liu [4] and Xiao [5], however, only single processing parameter of TMCP, such as finish rolling temperature, final cooling temperature, cooling rate was investigated separately in their results.
The largest value of the orthogonal polar difference in that column implies that the change of level of this factor, will most affect the inspection target, therefore, the factors that we consider are the main factors.
Conclusions (1) The parameters of thermo-mechanical control process (TMCP) of the pipeline steel is studied by using Gleeble-3500 hot simulator as well as the orthogonal experiment with four factors and three levels, it is found that the sequence of the effect of parameters on the mechanical property is: Cooling rate > Heating temperature > Finish cooling temperature > Finish rolling temperature, the cooling rate is the most important factor affecting the inspection target and possesses a great influence on the hardness of the pipeline steel
The specimen with this kind of the microstructure possesses the desired mechanical properties.

It selected the transmission system parameters of the mechanical properties and established a servo-mechanical transmission system dynamic model.
At the same time, it analyzed the effect of the nonlinear backlash factors on system performance.
This single stage gear meshing element model considered backlash as the nonlinear factors.
The impact of the backlash factors could be seen on the load-speed condition.
Thus, backlash as a nonlinear factor was more serious factors to affect the system performance.

The factors affecting the meso-structure of soil, for example, stress state, the stress history, the stress path, the variation of groundwater, chemical field, biological field and physical field is discussed.
The mesco-structure [6] reflects its composition form and existing state, and is the internal decisive factors of engineering properties, especial shear strength.
That is the factors influence the mesco-structure also influences of the engineering properties.
The study of mechanical properties of Kunming peat and peaty soil.
Mechanical properties of deep peaty soil.

Experimental Study on Molding Technology and Mechanical Properties of Cotton Stalk Block Guoxin Chen 1, a, Weigang Feng 2,b and Wei Huang 2,c 1 Colleg of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, P.R.
The work presented in this paper focuses on the molding technical and mechanical properties of cotton stalk block.
The previous test data and practical experience show that the major three factors affecting the compressive strength of the block are the glue consumption, the density of block and the sand content of block.
Some of the experimental data and experience shows that: the major three factors that affect the compressive strength are the size of the glue, the pressing size and the sand percentage, so we need to study of the cotton stalk block material properties, production process, and the optimal combination of the three factors that effect its mechanical properties by experiments, especially the Compression performance.
In this experiment, the main purpose is to study the influence of the size of the glue, the pressing size and the sand ratito to the mechanical properties of cotton stalk block, in order to distinguish each other clearly, we marked the three factors respectively as A,B,C.