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Introduction Steel reinforcement corrosion is among the most significant durability issues affecting reinforced concrete structures.
FRP properties are influenced by various factors such as the type and orientation of the fibers, the volume of fibers used, the type of resin, and the level of quality control applied during manufacturing [3].
To evaluate the mechanical properties of BFRP-reinforced concrete structures, Alkhraisha et al. [7] studied the flexural strength of concrete beams reinforced with BFRP bars under severe exposure conditions.
BFRP bar material properties [7].
Shi, A review on mechanical properties and deterioration mechanisms of FRP bars under severe environmental and loading conditions, Cem.

There are many factors, which will affect the springback, the springback amount of bending parts will has a great change because of the volatility of material property and the change of friction conditions for each obiect to be processed, even if other forming condition are the same.
In this region, there is bending moment and a bending curvature affecting the sheet metal, The distance between die and punch is very small by comparing with the bending stroke, and the radius of bending curvature is very large, so this region can be seen as a straight line.
In addition, the size of springback angle is also affected by same factors, such as the shape of bending part, sheet thickness deviation, etc. which should also be considered in the design of the mold.
Chinese Journal of Mechanical Engineering, 2011, 37(11):92-95
Chinese Journal of Mechanical Engineering, 2003,16(2): 190-192

Introduction Copper is one of the metals most extensively used in industry, either because of its intrinsic properties or as a base for further formation of metallic films.
Electroplating copper films have been widely investigated with regard to their structural characteristics, electrical properties and corrosion resistance [3, 4] but less care has been yielded to their mechanical behavior and its relation to Electroplating parameters.
One of the most important mechanical properties of the coatings is the adhesion strength, which is defined by The ASTM as the "condition in which two surfaces are held together by either valence forces or by mechanical anchoring or by both together" [1].
(Teer ST-30) Scratch test is one of widely used, fast, and effective methods to obtain the critical loads that are related to adhesion properties of the coating [5, 6].
A total number of 20 experiments with three factors (2k +2k + 6, where the number of factors k = 3).

On the other hand, math approach all alone is not enough as there is no way to account for all factors.
In general, it's physical properties are much like that of the normal steel.
Table 1 shows the physical properties of the rubber.
The direction of the cord and its physical properties can greatly vary, however, in case of vulcanization.
The properties of composite material used in this investigation are shown in Fig. 5.

Three properties of the polymers were considered, viscosity was evaluated by melt flow rate (MFR), crystallization by differential scanning calorimetry (DSC) and mechanical property through impact strenght.
Oblak and co-workers [10] found that mechanical recycling caused evident deterioration of HDPE mechanical properties after 10th reprocessing cycles.
They also emphasized that even after 100 recycling cycles, HDPE was able to retain 80% of its initial mechanical properties.
Conclusions Some properties are more sensitive to reprocessing than others.
Impact resistance was not affected after five reprocessing cycles.

It is found that, FSW has a major impact on the microstructure and mechanical properties of FSW TWBs and the thickness ratio significantly affects the properties of the blank.
Generally, the two factors such as tool geometry and process parameters would provide desired weld quality.
By focusing the future work with these two factors, we can obtain good weld joint with safe, environment friendly and economical welding condition.
"Mechanical Properties and Welding Power of Friction Stirred AA2024-T35 Joints."
"Fracture and mechanical properties of friction stir spot welds in 6063-T6 aluminum alloy."

For metal forming it is generally assumed that the shape, properties and dimensions of the final product are directly controlled by the mechanical state of the process and material mechanical response represented by flow stress, but in practice the microstructure evolution can change the situation drastically.
This process will lead to completely different microstructure evolution and properties compared to the case when the plate is rolled with no strain path changes using continuous rolling stands.
Cyclic shear strain reversals lead to redundant strains formation near the surface of the materials what makes prediction of the microstructures and properties, using existing microstructure evolution models especially complex [2].
It is especially important in the case of AHSS, where due to microalloying elements (Nb, Ti, V), final mechanical properties result from interactions between static recrystallization process and strain-induced precipitations.
In these alloys, increased strain reversal influences two factors: reduces driving force for recrystallization and reduces formation of strain-induced precipitation process what, in turn, causes decrease in Tnr temperature.

This alloy is popular for medium to high strength requirements with good toughness property.
Hot cracking is complex in nature and involves thermal factors, mechanical factors and metallurgical factors.
The thermal factors like heat input, cooling rate and mechanical factors like restraint intensity affect the strain distribution around the weld.
Senthil kumar et al [10] obtained fine microstructure which leads to improved mechanical properties through arc pulsing.
Grain refining is one of the best techniques to control hot cracking as well as to improve the mechanical properties 4.

Orthogonal experiment method was adopted in this study to simplify the experiments of lead-free wave soldering and optimize the process parameters in order to achieve the excellent quality and properties.
In contrast to other methodologies, which use mostly one-factor-at-a-time studies to identify controllable parameters, in this study the effects of four main factors were studied through the method of L9 (34) orthogonal experiment.
A standard orthogonal array matrix L9 (34) was constructed with four major production factors (Table 1).
In Table 1, the factors are A (1) , A (2) ,…,A(k) , and the levels of the factors are n1, n2, …, nk.
An n×n pairwise comparison matrix, A, is thus generate and exhibit two clear properties: (i) Homogeneity: if elements i and j are considered equally important, then aij=aij=1.

LLDPE has better performance than LDPE on such aspects as mechanical strength, stress cracking resistance, heat resistance, cold resistance and warping resistance, so the mechanical property of LDPE can be improved if it is used together with LLDPE[4-6].Changing the property of LDPE by using Aluminosilicate Zeolites to make refreshing film which has high permeability was studied in this paper.
And then test the mechanical properties of the film based on the criteria listed in Tab.2.
MD: machine direction; TD, transverse direction Fig.1 The tensile strength Effect of zeolite on barrier properties of LDPE film Tab.3 shows that the amount of zeolite had some effect on the barrier property of LDPE film.
Crystallinity of modified LDPE film is the main factor to affect OTR.
Effect of zeolite on thermodynamic properties of LDPE film In order to verify the changes of the mechanical and barrier properties of modified films, five kinds of samples were done DSC differential thermal analysis, as shown in Fig.3 and 4.