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The factors affecting damage model of reinforced concrete slab, standoff distance and explosives location, were analyzed.
Introduction The mechanical responses of reinforced concrete under the effects of dynamic loads are complicated.
The influencing factors include the amount of explosives and distance from the explosives to the RC slab.
Xiangbai Zhang[6] point out that the damage patterns on the slabs in the tests were classified as explosive catering, spalling, perforation; and punch that the spalling thickness is related to the amount of charge, the thickness, and the strength properties of the slab.

A variety of tubing fracture reason, such as quality of tubing, external loading environment, transportation and storage, they affect the safe use of the tubing, and quality factor is the most important factor[4,5].
Table 2 results show that the tensile properties of tubing accorded with the standard requirements, absorbed energy individual value of B# tubing meet standard requirement,and the mean low.
Conclusions Through the comprehensive evaluation the tubing materials properties, microstructure and fracture morphology, maked sure Φ73 x 5.51 mm N80 NU tubing fault was brittle fracture.
Washington DC: API,p. 71 [8] API Bull 5C2, Bulletion on Performance Properties of Casing,Tubing,and Drill Pipe. twenty-first edition, 1999.
Washington DC: API,p. 2 [9] ISO/TR10400, Petroleum and natural gas industries — Equations and calculations for the properties of casing, tubing, drill pipe and line pipe used as casing or tubing. first edition, 2007.

.), affecting the mechanical properties and appearance quality of the products and making it difficult to meet requirements of modern industry [1].
Factors affecting shrinkage of products include volume shrinkage, pressure, crystallinity, and orientation.
Based on the above factors of injection molded part warpage, the mold flow software divides the causes of warpage into following three aspects: 1.
Then, mold flow software is used to analyze the degree of three factors affecting warpage.
Figure 8 Runner system of solution 2 Figure 9 Cooling circuit of solution 2 Then, Mold flow software is used to analyze the influence degree of three factors affecting warpage.

Different Salt Solution on the Deterioration of Marine Engineering Concrete Under the Action of Chemical- Mechanical Coupling Honggen Qina, Jiajun Dengb, Ping Zhangc, Chaoming Pangd, Yikun Houe School of Materials Science and Engineering, Southeast University Nanjing, 211189, PR China.
Introduction The durability of the concrete generally refers to the property or ability to resist physical, chemical or mechanical factors.
Coupling of all above factors could accelerate the damage process of concrete remarkably.
TABLE1 THE MAIN CHEMICAL COMPOSITIONS OF RAW MATERIALS Parameters ω（CaO) ω（SiO2) ω（Al2O3) ω（Fe2O3) ω（MgO) ω（SO3) Cement 65.03 21.38 4.71 3.68 2.53 0.53 Fly ash 3.49 52.42 33.25 4.53 1.07 / Slag 36.35 33.48 12.21 1.41 10.60 0.66 TABLE 2 PROPORTION OF CONCRETE MIXTURE PREPARED Group C FA SL W S G JM-PCA ρco[kg/m3] C50FS 0.40 0.30 0.30 0.33 1.50 2.50 0.51 2390 Test mechanical properties of the specimens after standard curing for 90 days: the compressive strength was 57.6MPa and the flexural strength was 8.7MPa.
Fig.7 The Concentration of the Chloride Ion Fig.8 The Concentration of the Sulfate Ion Conclusions (1) Under the coupling effect of wetting and drying cycle and bending load, different salt solution affects the durability of marine concrete at different degrees: sulfate salt is more corrosive than chloride salt, simulated seawater is similar to 5.0%Na2SO4 solution, while five-time simulated seawater is the most corrosive

All of these effects have a substantial influence on the fatigue properties of metals [2].
Tensile properties and Vickers hardness (HV500g) Tensile properties Vickers Hardness (HV 500g) E [GPa] σys [MPa] σus [MPa] A [%] Surface 1/4 diameter Centre D2205h 174 629 793 51 337 272 258 D2205hsp 163 637 795 42 340 280 263 D2205c 156 971 1124 16 374 356 334 D2205csp 157 967 1118 15 370 353 335 As shown in Table 2, the shot peening process does not affect the mechanical properties of the bars, as might be expected, since this process only affects the bar surface.
This finding may be explained by different important factors, such as differences in the geometry and size of surface defects and in the residual stress pattern between hot and cold rolled reinforcing bars [9].
However, there are other factors affecting the fatigue behaviour of corrugated bars, such as the residual stresses induced during manufacture and surface defects, which also need to be controlled.
Effects of shot peening on fatigue properties of 0Cr13Ni8Mo2Al steel.

The aerostatic guide way is one the structure of the air thrust bearings, the carrying capacity and stiffness are important static properties of aerostatic guide way.
Then analyzed the restrictor structural effect on the static properties of the aerostatic guide way.
It found that orifice diameter and gas chamber diameter have important effect on the static properties of the aerostatic guide way.
Shuliang Ye and Dongsheng Li researched the mechanical properties of the aerostatic guide way with the finite volume method, gained the Pressure distribution of the working plane under different film thickness [2].
So the study of the structure of the restrictor on the static properties of the aerostatic guide way has an important significance.

From this study, it was found that the PET-modified mortars exposed to aggressive environments showed better resistance to chemical attack and higher resistance to chloride ion penetration than unmodified one without substantially affecting the mechanical strength in tap water.
Among the threatening factors like freezing and thawing, abrasion, corrosion of steel, chemical attack may deteriorate the concrete [10-12].
The mechanical properties of mortar and composites are also presented.
Factors of rate of acidic attack and protective measures, Construction and Building Materials, 16 (2002) 215-222
Li, Physical and Mechanical Properties of Styrene-butadiene Rubber Emulsion Modified Cement Mortars, Cement and Concrete Research, 35 (2005) 900-906

Temuujin et al. in his paper suggested that CaO will improve mechanical properties of geopolymers [26].
This may be due to the CaO content that affects the mechanical properties of the geopolymer materials.
Geopolymer chemistry and properties.
Alkali activation of metakaolins: parameters affecting mechanical, structural and microstructural properties.
Influence of calcium compounds on the mechanical properties of fly ash geopolymer pastes.

They find wide applications in automobile and aerospace because of their excellent combination of physical, mechanical and tribological properties.
At the same time the other mechanical factors such as strength, stiffness, hardness also to be increased or enhanced than the base metal.
The physical properties of fly ash mainly depend on the type of coal burned and the burning conditions.
Mechanical Properties Analysis 4.1Micro-hardness test results of Al-MMC The Micro-hardness testing of the Al-MMC’s was done by Vickers Hardness tester with diamond indenter.
Preparation of Al-MMC specimens for mechanical and micro structure and mechanical properties determination was successfully done for 5% of Coal fly ash and Microsphere. 2.

This surge is primarily fueled by factors such as an aging population, accidents, and injuries resulting from sports activities.
However, studies on the influence of compaction pressure on the mechanical properties of porous Ti materials are still limited.
Consequently, at this particular location, NaCl may experience localized melting, directly affecting the crystallization process of Ti.
We compared the mechanical properties of porous titanium materials fabricated using the SPS method, where NaCl was used as a space holder.
In further studies, we will focus on different temperatures below 700 degrees Celsius and the influence of other technological factors to optimize the fabrication process.