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Experimental materials in this paper are taken from songyue temple and fawang temple which are both in henan province, X ray fluorescence analysis method is adopted to analysis the chemical ingredients of the historical bricks come from two temples respectively; strength of the bricks come from two temples are compared also; then a model of porous bodies connected parallel is established to reflect the pore distribution of material, the qualitative relationship between strength of material and porosity/pore distribution is derived; mercury intrusion method is used at last to get the porosity and pore microproperties of the historical bricks come from two temples, results show that porosity and microproperties of pores are important factors that affect the characteristics of historical brick material. 1 Introduction Historical brick material is a kind of porous artificial material that used in historical buildings widely, the main chemical ingredients of this kind of material are SiO2
Porosity and pores distribution are very important microproperties of historical bri- ck material, they are also key factors that affect the macrocharacteristics of historical brick m- aterial, like weather-resistant and strength etc, so it’s necessary to study the porosity and pores distribution of material.
(4) P——pressure(psia); ——surface tension of mercury(485dy/cm); r——radius of pore(nm); ——contact angle between mercury and experimental material() [8,9] A number of factors affect the mercury intrusion results, most important among them are the meth- od of sampling, number of sample, sample conditioning, rate of pressure of application, maximum i- ntrusion pressure applied, values of contact angle and surface tension of mercury used in Washbur- n’s equation etc [4].
[6] R.Kumar,B.Bhattacharjee, Study on some factors affecting the results in the use of MIP method in concrete research, Cem.
Melin, M.; Hartmann, Effect of micro- and macroporosity of bone substitutes on their mechanical properties and cellular responseJournal of Materials Science: Materials in Medicine, v 14, n 12, p 1089-97, Dec. 2003

These works focused on studying of the variation of the welding parameters that affected to vary the machnical properties such as a fatigue strength, an impact strength, a tensile strength, and a sound microstructure of the joint [4-8].
Bhadeshia, Recent advances in friction-stir welding – Process, weldment structure and properties, Prog.
Balasubramanian, Microstructure and tensile properties of friction stir welded dissimilar AA6061–AA5086 aluminium alloy joints, Trans.
Athithanambi, Effect of Axial Force on Microstructure and Mechanical Properties Of Friction Stir Welded Squeeze Cast A413 Aluminium Alloy, Mater.
Dieter, Mechanical Metallurgy, McGraw-Hill Book Company, Singapore, 1988

Therefore, the properties of metal matrix and its diamond retention capacity are key factors in governing the performance and useful life of the diamond tools [3].
One set of specimens was fabricated by injecting the slurry into the die for mechanical properties testing.
The characteristic of the fracture morphologies is in accordance with the results of the mechanical properties.
Therefore, in order to increase the mechanical properties of the metal matrix and diamond composites, two hardened measures should be tried.
Al-7.5%Cu alloy used as the metal matrix of diamond wheel has a lower mechanical properties compared to that of the commercially available bronze.

Lead free solder such as SAC237, SAC305 and SAC405 are currently studied because of the low melting temperature which is nearer to SnPb, superior mechanical properties and good compatibility [2]-[4].
Each pad finishes have its own properties and characteristics in terms of how it affects the solder joint reliability, IMC, and cost [5, 6].
As reported in Ewald et al., there are two major factors that may cause the formation of voids [9].
These include the temperature profile and the properties of flux used in the solder paste.
Jeffrey, A review of mechanical properties of lead-free solders for electronic packaging, Journal of Materials Science, 2009, 44, (5), 1141-1158

From the dynamics model, the main factors affecting the reaction rate of the system are heating temperature, nickel content and the diffusion layer thickness δ.
Introduction The metal matrix composites can be prepared with in-situ reaction method, which has high mechanical properties.
Main factors affecting the reaction rate is heating temperature, particle size of Ni and thickness of the diffusion interlayer δ.

By measuring the cured polyurethane films absorption and mechanical properties, we determine the conditions for UV curing, 3% TMPME, photoinitiator (2959) and to UV light application time for 30s.
Therefore the films were soft, flexible, with poor solvent resistance and mechanical property [4-5].
The obtained resins had high C=C content and the UV cured films exhibited high mechanical properties and good water resistance.
PEDA the introduction of more double bonds to main chains, these factors make the crosslinking density increases, so that the properties of waterborne polyurethane can be improved.
The UV cured films exhibited high mechanical properties and good water resistance.

Samples properties were evaluated by using standard mechanical and physical testing.
The results show improvement in all mechanical and thermal properties.
The materials used for plastic gears produced by injection molding or by cutting is generally, its properties depend on different factors ex.
The other properties of this fiber are shown in table (2).
Table (2):The physical and mechanical properties of GF.

Analysis on influencing factors of dynamic variations of CBM reservoir permeability during exploration process During the exploration of CBM depletion, physical properties of coal reservoirs are affected by many factors which are dynamic.
When reservoir pressure is reduced from 7MPa to the critical desorption pressure 3.8MPa and the porosity and permeability is gradually reduced, physical properties are continually deteriorated; when the critical desorption pressure is reduced from 3.8MPa to 2.5MPa, physical properties begin to increase until getting to the initial state; when pressure is reduced to abandonment pressure, physical properties are improved, and the final porosity is increased to 50%, and permeability is increased by 1.8 times.
Therefore, physical properties of reservoirs in the later period of Qinshui CBM Field exploration are improved with satisfactory gas generation conditions.
The initial gas saturation is an important factor that affects permeability variation during CBM depletion, as shown in Fig.5.
Conclusion (1) There are many influencing factors during the process of CBM exploration, physical properties of coal reservoirs are dynamically changed.

Drilling of such materials is a challenging task because of differential machining properties and checking the quality of hole is significantly a great attention.
Introduction Composite materials are used in industrial fields, such as aerospace, aircraft, automobile and sports, owing to their advantages in mechanical properties.
Smaga et al [9] found that feed rate is the most important factor which affects the surface roughness of the hole as well as fatigue life.
Lincoln et al conducted experiments in steel using HSS tool to drill the hole at flooded, MQL & dry lubrication levels which proved lubrication affects the hole quality [10].
[5] Sonbaty El, Khashaba U.A, Machaly T, Factors affecting the machinability of GFR/epoxy composites, Comp Structures, 63, pp.329-338,2004

Progressive Failure Approaches take into account the degradation of stiffness properties, due to the onset and evolution of the intra-laminar damage at element and lamina level, in the frame of a Geometrical and/or material non-linear Finite Element Model, to determine the load carrying capability of composite structures [7].
The proposed material constitutive model has been implemented in the FE software ANSYS© as a User defined material subroutine (USERMAT) and used to simulate the mechanical behavior of an Open Hole Tension specimen.
Instantaneous and Gradual degradation Models – A novel Gradual degradation model According to the Instantaneous degradation Models (IDM) the material properties associated to each failure mode are instantaneously reduced to a small fraction, according to the degradation factor K, of their original value, so that the damaged ply (at element level and for each integration point) gives a negligible contribution to the load carrying capabilities of the structure (ply-discount technique).
Among the lamina properties taken from [10], the values of the Intralaminar fracture thoughness have been listed in Table 1.
The proposed energy-based Gradual Degradation Model was found to overcome the mesh dependency problems affecting the standard instantaneous and gradual degradation models, providing, at the same, a very accurate prediction of the mechanical behavior.