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A number of factors can affect deformation behavior, including the interaction stresses between phases, the crystallographic relationships between phases, and the morphology.
Interaction stresses can result from the difference in the elastic properties of the two phases.
These interaction stresses and strains are determined by a variety of factors, including interfacial area, the strength of the interfaces, and the mechanical properties of the individual phases.
Since these factors can be manipulated during manufacture and processing, the single phase and interaction properties of two-phase alloys can be manipulated to modify the overall bulk mechanical properties and optimize for improved performance.
This necessary stress transfer can considerably affect the bulk deformation behavior based on the relative properties of the two interacting phases.

Dittrich[11] studied the quenching and partitioning heat treatment of experimental steel 42SiCr, the evolution of microstructure and hardness of heat affected zone (HAZ) of 42SiCr weld and its main influencing factors.
The effects of laser power and welding speed on the mechanical properties of TWBs were studied.
The joint of 35 J / mm had the best comprehensive mechanical properties.
The welded joint had the best mechanical properties under this parameter condition.
Peng, Microstructure and mechanical properties of fiber laser welded QP980 steel, J.

Introduction     When predicting the interaction of the vehicle running gear with the soil, you must first research environment (ie, soil mechanical properties). 
Bekker, who created the semi-empirical method, the mechanical properties of the ground into the pressure characteristics (vertical direction) and shear properties (horizontal direction). 
Loads in the mechanical properties of the soil under inquiry, the proven, running gear load is also an important factor. 
Mechanical properties of the soil under two mechanical load Soil under vertical load stress - strain relations.The compressive strength of soil subsidence and directly affects the running resistance of the tire. 
Figure 5 Shear stress, deformation curve Conclusion All in all, the mechanical properties of the soil under the vehicle load factors role has two main aspects. 

Properties of the different types of aggregates.
The reduction in the mechanical properties of concrete with recycled aggregate is mainly due to two crucial factors.
Limits of use of recycled coarse aggregate of limestone origin in structural concrete based on mechanical and elastic properties.
Fire Performance of Sustainable Recycled Concrete Aggregates: Mechanical Properties at Elevated Temperatures and Current Research Needs. 52(3), págs. 817-845
Fire Performance of Sustainable Recycled Concrete Aggregates: Mechanical Properties at Elevated Temperatures and Current Research Needs.

The Main factors affecting the stability of underground caverns are selected, including the rock mechanical parameters (elastic modulus, Poisson ratio, cohesion and internal friction angle) and initial ground stress parameter (lateral pressure coefficient).
Introduction The in-situ measurement displacement of underground cavern is a comprehensive information value including all kinds of engineering factors, and is also an important index indicating project’s stability.
Moreover rock’s stability of underground cavern is affected at different levels by multiple factors including initial stress field, physical and mechanical parameters of rockmass, construction and supporting methods, and underground water, etc[1].
Among these parameters, initial stress field and physical and mechanical parameters of rockmass are key and internal factors influencing rock’s stability of underground engineering, and even for the same engineering these parameters are variational, so some scholars have observed that researching the influence degree and influence law on rock’s stability of initial stress field and physical and mechanical parameters, that is, sensitivity analysis of mechanical parameters to rock’s stability is very important to determine reasonable design and construction methods and various methods are adopted to study it[2-5].
So, based on large finite element analysis software FINAL of geotechnical engineering, designing testing program of sensitivity from a more overall view, this paper uses convergence displacement as the index of judging rock’s stability, and adopts numerical test method to carry out the sensitivity analysis of parameters concerning initial stress field and rockmass mechanical properties to displacement of rock.

The special composition of UHPC bring its unique physical and chemical properties, which are closely related to the density of the structure, thereby affecting the chloride ion diffusion and the corrosion of steel fiber.
The bond strength between the steel fiber and the matrix is a key factor affecting the tensile and deformation resistance of UHPC.
Corrosion will inevitably affect the mechanical properties of the steel fiber and the bond strength with the matrix, which will further expand to the whole performance of UHPC [48].
Qian, et al, Effect of nano-TiO2 on the mechanical properties of cement mortar, Constr.
Liu, et al, Mechanical properties of hybrid steel fiber reinforced high strength concrete, J.

Two major challenges in relation to laser welding are abrupt change in metallurgical aspects and actual assessment of the mechanical properties due partly to very narrow heat affected zone (HAZ) and partly to high mechanical properties gradient.
Estimations of microstructure and mechanical properties of the simulated HAZs of an ultrafine grain steel imposed by laser welding with or without post-weld laser tempering were performed.
The actual mechanical assessment of laser welds remains problematic as impact properties can not be measured by the standard techniques due to fracture path deviation phenomenon in Charpy testing of a very narrow weld [6-7].
The main objective of this study is to examine the mechanical and metallurgical behavior of the HAZ of laser welding of ultrafine bainitic ferrite steel by reproducing the thermal cycles and enlarging the volume of the heat affected zone on Gleeble simulator.
Combination of these factors is responsible for evolution of mechanical properties of the ultrafine bainitic ferrite steel imposed by laser welding thermal cycle and subsequent laser tempering thermal cycles.

Analyzed by finite element reinforcement ratio, concrete strength and other factors on the mechanical properties of concrete under axial compression reinforcement FRP pipe, the analysis of the results shows: The increase of reinforcement ratio to improve the point load of the specimens and improve the composite column ultimate bearing capacity, but the reinforcement ratio increase will reduce the binding effect of the FRP pipe; The whole component be improved the strength of concrete can improve the ultimate bearing capacity, but it reduces the mechanical properties of the specimens.
To a certain extent to avoid the Required parameter choice and parameters of the complex relationship between each other, The interference of random factors test process, expensive trial funding and laboratory conditions [3].
But the GFRP pipe ultimate strain did not differ much, Although reinforcement ratio increase reduces the GFRP tube binding effect of concrete, but does not affect the overall mechanical properties of the specimens, it makes the mechanical properties of the specimens was improved. 4.2 The comparison and analysis of Ultimate bearing capacity According to the specifications given by the normal section [5] bearing capacity calculation formula of axial compression member: —①Each set of specimens with- out the bearing capacity of GFRP tube constraints.
Table 5.1 Comparison of different concrete strength ultimate load analysis Concrete strength The model ultimate load N1 Calculated N2 Improve multiples of N1 / N2 C25 3451 941 3.67 C40 4267 1406 3.03 C60 5014 2024 2.48 According to Table 5.1, Although bearing capacity while improve the strength of concrete can improve the limit of the component, but without addition of FRP tube confined reinforced concrete ultimate bearing capacity comparison , with the strength of concrete increase, multiples reduced instead .The reason is: (1) High strength concrete has been damaged by the pressure, circumferential deformation is large while 5mm GFRP pipe apparent thickness is not enough, it can't provide sufficient constraints to limit lateral deformation of concrete, reduce the mechanical properties; (2) reinforcement rate of 1.306% is low .reinforcement ratio is also an important factor to affect the lateral deformation of concrete. 6 Conclusion (1) In this article, the finite element modeling
Mechanical Behaviors Study on GFRP Tube Filled with Reinforced Concrete Members.

Introduction Awareness of environmental issues and sustainability materials contribute to the important factors that encourage researchers to explore the potential use of natural fibers.
Fiber orientation is one of the factors that influence properties of the composite where the direction affects the stiffness and strength compared to the fibers that are oriented in more than one direction, such as in a mat [8].
This clearly shows that, tensile temperature and the fibers orientation can be affected the composite properties.
While when the fibers orientation opposite of the applied force this also will reduce the mechanical properties of the composite.
Ahmad, “Curing Characteristics, Mechanical and Morphological Properties of Kenaf Fibre/Halloysite Nanotubes Hybrid-Filled Natural Rubber Compounds.”

The effect of water activation on the physical and mechanical properties of slaked and quicklime composites and the resistance to the effects of the biological environment are studied.
Water is the most important factor determining the technological properties of concrete mix.
To obtain the quantitative dependences of changes in the physical and mechanical properties of the calcareous composites under the influence of various modes of mixing water activation. 4.
The results of the study of the physical and mechanical properties of calcareous composites prepared on the activated mixing water are shown in Fig. 1 (a, b, c).
Obviously, it is precisely under these regimes that the processes are activated to a greater extent affecting the calcareous composite structure formation.