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Key Laboratory of Advanced Textile Composites (Tianjin Polytechnic University), Ministry of Education, Tianjin, 300160, China Correspondence to xgma@tjpu.edu.cn Key words: thermochomic; energy-storage; sol-gel; composite materials Abstract: Composite thermochromic energy-storage materials (CTEM)were prepared by sol-gel method, Factors exerting influence on thermochomic and thermal properties of composite materials were discussed, such as the molar ratio of ester to water, the dosage of thermochomic materials, pH value were optimized via 3 factors and 3 levels of L9 (33) orthogonal design.
It was usually composed by chromophoric reagent, delomorphic reagent and solvent [1], of which chromophoric reagent decided the properties such as the color and stability of the reversible thermochomic materials, delomorphic reagent decided the color shade and the solvent decided the temperature to change color.
Various factors that influence the thermochromic and thermal properties of the CTEM were carefully discussed, such as the molar ratio of ester to water, the dosage of thermochomic materials, pH value and so on, the optimum formulation was successfully acquired at last, subsequently broadening the use of the organic phase change materials and laying the foundation for the development of intelligent textiles.
Tianjin, China), Deionized water. 1.2 Methods 1.2.1 Sol - Gel method mechanism In this experiment, under constant mechanical stirring, TEOS as precursor, was mixed in ethanol solvent to form a homogeneous solution.
(2) The thermochromic energy-storage materials prepared through appropriate formula were tested for reflectivity and thermal properties, the results showed that it had excellent chromogenic and thermal performance

Whereas permeability tends to be more influenced by pore connectivity, the elastic properties and strength of concrete are affected by the total volume of pores, in particular, the distribution of macropores which are sized greater than 50nm[3-4].
Fresh concrete properties Wet concrete property GP concrete OPC concrete Mix Temp.
The relatively dense microstructures suggest possible good mechanical properties, partly attributable to the near-complete gelling characteristics of traditional silica geopolymer systems during heat-curing.
The corresponding risk factors associated with GP binder systems though likely to be similar to OPC systems, remain largely unclear.
Davidovits, Properties of geopolymer cements, in: P.V.

The accuracy of springback simulation is affected by various computational and material factors, all of these factors should be determined cautiously.
Fig.1 Schematic description of the tool for U-channel forming and springback simulation The computational factors such as element type, mesh size and integration scheme were chosen carefully to yield the best results.
Table1 shows the summary of parameters of mechanical properties.
Table 1 Mechanical properties of DP600 steel sheet Basic parameters Hill'48 parameters Nonlinear hardening parameters Young's module[GPa] 207 F 0.44 Q[MPa] 190 Poisson ratio 0.3 G 0.46 b 8 Yield stress[MPa] 420 H 0.53 C[MPa] 9500 Density[Kg/m 3] 7800 � 1.82 γ 40 The finite element simulation and experimental results are shown in fig.2.
Error factors are given in the bracket. β1, β2 indicate the variation of θ1, θ2 after springback.

Introduction A cylinder works as a basic component for installing other parts, such as transmission shaft, cam shaft and gears, whose machining quality will directly influence the relative position between the crankshaft and connecting rod mechanism and gas distribution mechanism etc.The surface finish quality of the deck face is a major factor which affects the head gasket sealing of an engine block and a critical quality measurement that determines how well the part function in service.
However, some hypothesis condition affect the prediction accuracy of Z-A model.
So this paper chooses the J-C model to describe the properties of 6061-T61, J-C model is shown as follows: (1) Where σ is the material flow stress, ɛ is the plastic train, is the strain rate, is the reference strain rate.
The empirical constants are as follows: A is the yield stress, B is the pre-exponential factor, C is the strain rate factor, n is the work–hardening exponent and m is the thermal-softening exponent.
Experimental investigation and modeling of thermal and mechanical influences on shape deviations in machining structural parts, International Journal of Machine Tools & Manufacture[J], 2010, 50: 1015–1021

MK (Al2Si2O7, or AS2), is a supplementary cementitious material with pozzolanic properties obtained by calcination of clay with high kaolinite (Al2Si2O7·2H2O) content at temperature between 500 °C - 800 °C.
The properties of MK as a pozzolanic material have been reported previously [6, 7, 8].
Properties of metakaolin are given in Table 2.
Excluding the role of temperature, a concentration of reactive Al2O3 from clinker and metakaolin together with size of particles are main factors affecting initial reactions.
Nevertheless other factors are also important.

Introduction PMM is widely applied in the industry because of its excellent properties, such as high hardness, high toughness and high strength.
Due to these excellent properties, PMM is hard to process by the traditional cutting.
Therefore, only if the materials with electric conduction, they all can be manufactured by EDM no matter the mechanical properties of these materials, so it is appropriate using EDM to finish the PMM.
For understanding the re-sticky phenomenon of PMM in EDM, the content and the melting point of the material were two main factors to decide what kinds of PMM were utilized.
Some physical properties of PMM are displayed in the table 1.

Dielectric materials have the property of polarizing under the action of an external electric field.
The aim of this article is to present the electric properties of the thermoelectrets obtained from poly(acrylonitryle).
The heating rate was 1K/min. uncertainties affecting the fitting parameters increase.
contribution. energy, the pre-exponential factor and the Arrhenius law the relaxation time at T=300 K was calculated.
Furthermore, this interpretation is supported by the results obtained from dielectric measurements and dynamic mechanical analyses.

Introduction Silicon carbide particle reinforced aluminum matrix (SiCp/Al) composites are attractive materials in the various areas of the industrial application because of their superior properties.
By this way, the wear properties of SiCp/Al composites can be substantially varied through the changes in the microstructure, morphology and volume fraction of the reinforcing particulates.
Despite of these many advantages in the mechanical properties, however, they have serious drawback for industrial applications such as the poor machinability [2,3].
A lot of studies have been conducted for machining of SiCp/Al composites, and it is found that the morphology, distribution and volume fraction of the reinforcement phase are all factors that affect the cutting process [4-7].
During experiments, only one of the parameters, such as the table speed was varied while the cutting depth was held constant to observe the effects of individual parameter on machining properties.

Test Description 13 T- and 11 L-shaped columns are designed, and then the mechanical properties of the concrete and reinforcment are measured,and they are shown in Table 1 and Table 2.
Tab.1 The mechanical properties of concrete （MPa) （MPa) （MPa) （MPa) 28.0 26.62 17.81 2.11 Tab.2 The mechanical properties of reinforcment diameter（mm) yield trength(MPa) tensile strength (MPa) 14 386.8 584.0 16 322.7 495.4 In the table 1,is the test value of cube compressive strength; is the standard cube compressive strength; is the axial compressive strength; is the tensile strength.
The pros and cons ductility factors are small, so the shear failure of broad-limb special-shaped columns should be avoided in seismic design.
It is shown that the shear capacities of special-shaped columns are affected by loading angles obviously from the test in this paper on broad-limb special-shaped columns with different loading angles.
Formula for calculating shear capacity Since there are many shear failure influencing factors of special-shaped columns, and the failure mechanism is complex, there is no calculation method on complete mechanical theory at present, the calculation of shear capacity adopts semi-theoretical and semi-empirical formula.

The wear mass loss is used to assess the anti-wear properties of different additives.
The factors that cause the improvement of anti-friction properties of the friction pairs lie in the quality and the silver content of the auto-restoration films formed on the surfaces of friction pairs.
The anti-friction and auto-restoration properties of sole nanomaterial will be restricted by its own physical and chemical properties.
Meanwhile, Ag was also a major factor that influenced the improvement of the antiwear property.
Preparation and tribological properties of surface modified Ag nanoparticles.