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Typically, the mechanic properties of ceramics decrease after either long service times at high temperatures or cycles of temperature changes.
It is a comprehensive manifestation of the mechanical and thermal properties of ceramics under heating condition [3].
As a result, the influencing factors, test conditions and test results of ceramics are very different from those of metals.
Yan, Mechanical Property Loss of Hot-Pressed Si3N4 under Thermal Fatigue Conditions, J.
Kingery, Factors affecting thermal stress resistance of ceramic materials, J.

Cracking and Mechanical Strength of NaOH-Slag Geopolymers Bo Zhang Triodent Ltd, Katikati 3129, New Zealand Email: zhangbo66@yahoo.com Keywords: Geopolymer, slag, sodium hydroxide, crack, strength, curing temperature Abstract The effect of the curing temperature and NaOH content on cracking tendency and compressive strength for NaOH-slag geopolymers is reported in relation to 29Si and MAS NMR structural analyses and XRD phase quantitative analysis. 1.
Introduction Mechanical properties of NaOH activated slag geopolymers are an important consideration for structural applications.
Pratt, “Factors affecting the strength of alkali-activated slag”, Cement and Concrete Research, 24 (1994) 1033-1043 2.
Vladimir Zivica, “Effects of type and dosage of alkaline activator and temperature on the properties of alkali-activated slag mixtures”, Construction and Building Materials, 21 (2007) 1463-1469. 3.
Sanjayan, “Shrinkage cracking properties of slag concretes with one-day curing”, Magazine of Concrete Research, 60 (2008) 41-48 6.

In manufacturing by means of a 3D printer as well as in any other manufacturing technology, the precision of the end product is affected by a variety of factors and effects that shall be familiarised with in order to provide high dimensional and shape precision.
It is necessary to clear the manufactured part of all excessive powder, remove from the base and remove the supporting structures in a mechanical way.
Laser head Laser beam Laser processed area Powder bed Layer thickness Piston Substrate Blade Powder Powder container Fig. 1 The basic principle of SLM technology [1] Designing the Parts for Precision Verification of SLM 280 HL Machine The process of 3D parts manufacturing is influenced by many factors that affects the general precision and quality of the manufactured parts.
It is also important to design the model so that the key dimensions of the model, that will be inspected, will not be surrounded by the supporting structure, because the mechanical removal after the manufacturing might affect the results of manufacturing precision.
According to the manufacturer's information, the properties of part produced in such manner are 99% identical to conventional castings of the same material.

Dissolution of gas and salts leads to the variation of groundwater property in geotechnical medium.
Due to many factors water in geotechnical medium is not usually neutral.
Polymerization of water glass is related with many factors, among these factors pH value has ultimate influence.
But grout gel is not always stable, and is affected by outside environmental factors.
And pH is an important controlling factor.

The article deals with the assessment of lubricants properties, monitoring of behaviour and consequences of the lubricant degradation process during its work in the machine lubrication system of aircraft engine by using tribotechnical diagnosis.
By used of ferrographic analysis was studied morphology of wear particles and physic-chemical properties of oil were determined with Fourier transform infrared spectrometry (FTIR).
The essence of a tribotechnical analysis is to evaluate presence of worn off particles in an oil system, to determine their concentration, number, geometric parameters and physical and chemical properties of the lubricant.
These factors cause troubles with functionally quality of oils and materials of mechanical components of lubrication system.
Bičejová, Factors influencing hydroerosion surface topography, In: Nonconventional Technologies Review.

Fig.1 Thin-wall product drawing Table.1 Properties of the Marlex AGN-650 Recommended injection temperature /℃{TTP}8451 Recommended mold temperature /℃{TTP}8451 Melt temperature /℃{TTP}8451 The lowest melt temperature /℃{TTP}8451 The highest melt temperature /℃{TTP}8451 Melt index /g/10min 116 40 225 190 260 65 The software is MOLDFLOW MPI6.1 which used in experiments, select fusion mesh to divide mesh.
Table.2 Properties of the injection machine Equipment Type Maximum clamping force /ton Maximum injection volume /g Maximum injection rate /g/cm3 Screw diameter /mm HTL1200 1200 6193 1024 125 Experimental Design As the thin-wall plastic part is an appearance product, warping will seriously affect the visual quality of plastic parts; moreover, it will affect the overall performance of plastic parts, so the research of warping has large practical value.
Table.3 Experimental factors and levels Experimental level Experimental factors Mold temperature A/℃{TTP}8451 Melt temperature B/℃{TTP}8451 Holding pressure C/% 1 40 220 70 2 50 240 80 3 60 260 90 This orthogonal experiment is 3 factors and 3 levels, if a comprehensive test of all the different combinations; you need to be = 27 different experiments, so it is more complicated experiment.
Experimental factors Results A B C Warpage /mm 1 40 220 70 4.015 2 40 240 80 3.645 3 40 260 90 3.361 4 50 220 80 3.507 5 50 240 90 3.921 6 50 260 70 3.703 7 60 220 90 3.891 8 60 240 70 3.891 9 60 260 80 3.530 In order to get influence degree of this test factors indicator, need to analyze the range of orthogonal experiment.
The greater the difference R, indicating that the factor can greater affect the index, the range analysis results of various factors is shown in Table. 5.

The key to numerical analysis is to determine the dependence relations between the relative displacement of the key point (marked with a circle, Fig. 1) on right walls of power house and the selected affecting factors.
Only surrounding rocks of homogeneous character are analysed in this paper, but their deformation and strength properties are considered according to their solidity extent using four major rock types; and the effects of different overburden depths and lateral coefficients of geo-stress are also taken into account.
And then, we conduct the sensitivity analysis of the 4 factors on the stability of surrounding rock.
The λ and h are the less sensitive factors.
Conduct sensitive analysis of four factors selected in this paper, the most sensitive factor to the displacement of KP is E, the second is H; λ and h is less sensitive comparatively.

Accordingly, in this paper, the parameters affecting product quality are analyzed.
Control factors and process-parameter levels.
The effect of control factors on S/N ratio and their respective levels are shown in Table 6.
Based on Fig. 2, the optimal level of control factors is A3B2C3D3E1F1.
Influence of mechanical properties of the sheet material on formability in single point incremental forming, CIRP Ann-Manuf.

It was found that the water flow rate Qw and the height of medium hm are the two most important parameters affecting the transparent window size At.
A systematic study of the parameters affecting the transparent window size At and the transparent window size stability est will give very useful guidance on design of the practical measurement device.
Input parameters Qw Water flow rate vt Table velocity hm Height of medium φw Water channel diameter cc Coolant concentration Output parameters At Transparent window size est Transparent window stability Inputs Outputs At est Controllable factors Transparent window generation Uncontrollable factors … A (Qw) B (vt) C (hm) D (φw) E (cc) Coolant Workpiece vt Applicator Transparent area Water channel Table 2.
Levels of factors Level A (qw) B (vt) C (φw) D (hm) + 2.0ml/s 60mm/s 2.0mm 0.2mm - 1.0ml/s 150mm/s 1.0mm 0.5mm Table 3.
Conclusions The factorial test results show that the water flow rate Qw and the height of medium hm are two most important parameters affecting the transparent window size At.

The main factor affecting the rubbing fastness is the friction coefficient of the film.
This paper has studied soft and hard monomer ratio and the main factors affecting the synthesis process in acrylic emulsion polymerization to investigate the best synthetic process.
The basic factors: A-butyl acrylate, B-methyl methacrylate, C-acrylonitrile, D-acrylic acid.
Change the amount of the emulsion, fabric properties after printing is shown in Table 4.
In the discussion course of these factors, we explore the optimal technical parameters to develop printing adhesives.