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It is shown that the mechanical properties of calcium leaching and loaded concrete are determined by calcium leaching, load and coupling effect.
For calcium leaching and loaded concrete, the influence factors to stress at any point are elastic modulus, maximum strain, strain at this point and the degree of calcium leaching.
The durability of concrete structures is considerably affected by the accumulation of damage resulting from time variant external loading in conjunction with environmentally induced mechanisms such as moisture and heat transport, freeze-thaw actions, chemically expansive reactions, chemical dissolution or by the corrosion of the reinforcement.
Based on the experimental results on calcium leaching and coupled chemo-mechanical damage, material models equationted on a macroscopic level of observation, have been developed for numerical predictions of the life time of concrete structures.
Coupled chemo-mechanical damage constitutive relation of concrete under calcium leaching and load According Strain equivalent principle put forward by Prof.

The main parameters that can affect the load bearing of the non-flat joints are wave heights, wave lengths and also mechanical properties of adhesives and adherends.
The mechanical properties of the adhesive and adherends are given in Table 1.
The mechanical properties of the adherends and adhesive base.
Mechanical property Araldite® 2015 Al 7075-T6 Elastic modulus, E [GPa] 2 70 Poisson’s ratio, ν 0.33* 0.33 Tensile yield strength, σy [MPa] 14.4 448 Tensile failure strength, σf [MPa] 24.9 527 * manufacturer’s data Fig. 1.
As an important factor for investigating the strength of the adhesive joint, the effect of mechanical locking on the stress distribution of the joints can be further investigated by numerical analyses.

The excellent combination of thermomechanical properties makes silicon nitride a good candidate for applications where high hardness and mechanical properties are fundamental.
The improve of mechanical properties of silicon nitride comes from many factors, like refined microstructure by restraining grain growth, localized stress, crack tip bridging, etc.
Within these factors, microstructure formation of the silicon nitride is critically important for the final properties.
The improve of mechanical properties of silicon nitride based composites comes from many factors, like refined microstructure by restraining grain growth, localized stress, crack tip bridging, etc.
Within these factors, microstructure formation of the silicon nitride matrix is critically important for the final properties [7].

Ball milling time and concentration of short carbon fibers are the significant factors effect the dispersion of short carbon fibers among silicon carbide.
SiC whisker has good mechanical properties, heat resistance, corrosion resistance and high temperature oxidation resistance, it also has good compatibility with matrix material and it has become one of the major enhancements, toughening agent in composites.
According to fiber strengthen theory, carbon fiber can not play a function of reinforcing and toughening , it would affected the mechanical properties and toughness of the composites, the dispersion effects and the injury degree together determined the best ball milling time was 48h.
Determined the content of the content of SiC whisker is 5vol% based on the cost and the mechanical properties of composites.
Manufacture and Properties of Carbon Fiber-reinforced C/SiC Dual Matrix Composites[J].

Impact of high speed incremental forming on material properties of AA6082 sheets Giuseppina Ambrogio 1, a *, Stefania Bruschi2,b , Francesco Gagliardi1,c , Andrea Ghiotti2,d, Luigino Filice1,e 1Dept. of Mechanical, Energy and Management Engineering, University of Calabria - Italy 2Department of Industrial Engineering, University of Padova - Italy ag.ambrogio@unical.it, bstefania.bruschi@unipd.it, cf.gagliardi@unical.it, dandrea.ghiotti@unipd.it, el.filice@unical.it Keywords: Incremental Sheet Forming, High Speed, Aluminum.
More in detail, AA6082 sheets have been formed at very high speed as compared to the conventional processes in order to accurately analyze the impact of velocity on material properties.
Furthermore, according to this hypothesis and to the material properties, the experiments were carried out focusing the attention on the quality of the produced part rather than on the formability issue.
Being the attention focused on the proof that ISF could become competitive as compared to conventional deep drawing processes both in terms of quality and time, the experimental plan was designed varying all those factors that may influence the above specified outputs; accordingly, the tool feed rate and tool pitch were chosen as relevant factors for the experimentation and were properly changed, according to the plan shown in Table 1.
This reduces the flexibility but does not affect the conclusions related to material behavior.

Mar-M247 is widely used in industry for its excellent mechanical properties at high temperatures, but it has the shortcoming of difficulty manufactured.
Mar-M247 possesses the properties of high strength at high temperature, corrosion resistance and thermal-resistant.
As Mar-M247 has been employed in modern manufacturing, its mechanical properties has been mainly studied [3].
The properties of the main compositions for the coated cemented carbide inserts are also shown in Table 2.
Fig. 3 Tool life under different feed rates Fig. 4 Tool life under different cutting speeds Cutting temperature and chip disposal are two very important and correlated factors affecting milling.

The experimental method is often used in engineering because many factors affect the welded steel fatigue performance, which uses to obtain the welded of steel fatigue fracture data.
The experimental method is time-consuming, and many factors which affect the welded steel fatigue are difficult to be taken into account.
In recent years, the method of mechanical parameters of the weld near the local area has been used to describe the fatigue strength of welded steel structures.
Because this method has been taken into account the factors on the fatigue strength of welded steel structure local details, which can reflect the actual situation of structural fatigue fracture.
The Calculation of 3-D Residual Stress Field of Welded Steel Structure Adopting with 3-D FEA technique, selecting thermal analysis unit, considering the thermal resistance and mechanical properties of material changing with temperature, using the inside heat rate loading method to simulate welding heat source, a mathematical model of welding transient temperature distribution was established.

A Research On Static And Dynamic Fracture-Resistance Of Welding Parts Of Coolant Piping Material Haochuang Li, Kwang-Hyeon Lee, Jae-Mean Koo,Chang-Sung Seok Graduate School of Mechanical Engineering, Sungkyunkwan University, Korean, GM Korea, technical center, Korean School of Mechanical Engineering, Sungkyunkwan University, Korean School of Mechanical Engineering, Sungkyunkwan University, Korean lihaochuang123@126.com, psjjang@yahoo.co.kr, kjm9000@hanmail.net, seok@skku.edu Keywords: Fracture Toughness, Dynamic Loading, plastic η factor Abstract.
Tensile tests were performed according to ASTM E8 and ASTM E21 at a loading rate of 1mm/min to obtain the proper mechanical properties.
The mismatch factor MW is shown in Table 4。
Fig. 6 Relationship between plastic η factors and b / W for various strength mismatches As shown in Fig. 7, because the intersections of the lines fitting the analysis results according to variation of MW are located on the line of Eq. 3, the new plastic η factor equation was suggested.
[6] Y.Huh, H.I.Kim, K.H.LEE: Evaluation of the plastic η factor considering strength mismatch in a narrow gap welding part, Journal of Korean Society of Mechanical Engineers, Vol.32(2008), No. 6, pp. 512-518.

Several studies have reported that geopolymer binders show comparable or superior mechanical and durability properties than OPC system.
Mechanical properties of the final geopolymer brick product, are significantly influenced by variations in the type, composition and physical properties of the source material [32, 33, 34].
Unlike the workability of OPC mixtures which is affected predominantly by water to cement ratio, that of geopolymer mixtures is dependent on several physico – chemical factors such as concentration of alkali activator solution, alkali activator to binder ratio, mixing temperature, silicate modulus and solids ratio of the activator, physical properties of the raw material, etc. [22, 23, 36, 37].
Table 1 gives the values of impact factors determined for the various geopolymer materials.
Both of these factors increase the production cost

Gao [4] et al. found that prepared small cell size and uniform foaming materials can improve the mechanical properties of foaming material, the impact property of the material is increased, but the tensile strength is not increased much.
Jian [8] et al. study on mechanical properties of twice foaming polypropylene with SGF enhanced POE.
Mechanical Properties Tensile strengths were determined according to the Chinese Standards GB/T1040.1-2006 on a tensile test machine Instron8510.
perform better comprehensive mechanical properties.
Spherulite size is also an important factor which affects the strength and toughness of the polymer.