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The relation between the weld nugget microstructure and mechanical properties was explored.
Fatigue performance is a very important source for understanding the mechanical properties of the spot-welded joint and has been a considerable factor in the vehicle body design [4].
The mechanical properties of the Docol MS1400steel [10].
Sample geometric factors such as sheet thickness, sample width, and spot weld diameter can influence the stress distribution surrounding the nugget, thus, it affects the HCF performance [1].
Macrostructure and Mechanical Properties.

Plateau pressure, temperature, humidity, radiation and other major climatic factors, not make all properties of the device are adversely affected, just make some performance affected, and to different equipment, influence and degree is not the same.
Mechanical properties: at altitude 5000 meters maximum solar radiation is 1.25 times area at plain.
For the outdoor equipment, the increase in solar radiation will cause high temperature affixally rise, reduce mechanical properties of the organic insulating material, thus brings the deformation of the material and mechanical thermal stress.
Electrical properties of polymer materials: the deformation and brittleness caused by plateau environment will make the performance of the cable and plastic components of electrical decrease.
Whether each support personnel can withstand high altitude reaction test, is an important factor affecting personnel in rate, equipment support ability.

The Oliver and Pharr method is the most common ones,[4] in which the mechanical properties can be evaluated directly from indentation load-displacement curves.
To calculate the mechanical properties of each phase, the indentations were properly located on individual phases.
The difference in macroscopic stress-strain curves might arise from many factors that exceed the scope of this work.
Thus, if the method is modified by applying these factors, a more accurate prediction will be achieved. 4.
Wang, Effects of indenter angle and friction on the mechanical properties of film materials, Results in Physics 6 (2016) 509-514

The composites exhibit excellent mechanical properties and electrical conductivity.
The most important factors that affect the short fibers reinforcement are carbon fiber content and distribution [4].
Surface treatment for short carbon fibers is critical step to obtain geopolymer compositions of excellent mechanical properties and conductive properties [5].
The effects of fiber content on the mechanical properties, fracture behavior, microstructure and electrical conductivity of composites were investigated. 2.
The composites exhibit excellent mechanical properties and electrical conductivity.

The process of particle impacting and contacting curved surface of vane was studied, and the characteristics of particle size, particle initial velocity and its impacting direction affect the stress of subsurface were analyzed by using ANSYS/LS-DANY software.
It is shown that the interaction between particles and surface of vane is affected by nonlinear factors such as the elasticplastic property of material, the state of impacting and contacting and surface shape.
Because abrasive wear occurs in micro contact region with the high stress and large deformation, and it has more complex mechanism and many influencing factors, at present, the research work on this problem is mainly based on summaries of experiments and expression of simple theory models[2].
LS-DANY is a multifunctional finite element calculation software with properties of geometric nonlinearities, material nonlinearities and interface nonlinearities such as separation between friction and contact[3].
Mechanical engineering journal.

A large number of factors affect the diffusible hydrogen amount in a welded joint.
Among other factors affecting the amount of diffusible hydrogen in deposited metal when using flux cored wires are: consumables storage conditions (especially for flux cored wires with seam) and the chemical composition of the wire [6,11,15].
Still, other factors give the opposite effect.
Whereas other factors affect the depended variable in reverse.
Decreasing the diffusible hydrogen content in samples is limited by the necessity of welding in a stable manner and achievement of the desired mechanical properties of joints. 5.

This paper investigates the effect of heat treatment on the magnetic properties of nanocrystalline Fe-Ni-Si powders prepared by mechanical alloying method which can be used in soft magnetic composites fabrication.
These composites show similar magnetic, thermal and mechanical properties in three dimensions.
Magnetic, electrical and mechanical properties depend on preparation and fabrication processes, while purity, shape and particle size have an effect on all the properties [5].
Hence, magnetic properties will improve.
Shokrollahi; The magnetic and structural properties of the most important alloys of iron produced by mechanical alloying.

The article discusses the non-metallic inclusions in the oxide and silicate types welding joints and their influence on the formation of the metal mechanical properties.
Influence of NMI on the steel strength is determined by their form, size, properties and arrangement in the matrix.
One of the factors that affect the crack initiation possibility is the size of the inclusions.
Thus, structure-phase composition of steels is one of the key factors that influence on the formation of a general set of its mechanical properties.
Interaction of carbon atoms with defects can not be any constant because of the existing dependencies on several factors.

Epoxy resin is generally known to be a brittle material and it was convenient in the evaluation of interference phenomena among plural cracks because it is not necessary to take into account effects of the material properties as with polycarbonate, which often develops crazing [9].
Calculation of stress intensity factors in mixed mode deformation The stress intensity factor in the mixed mode deformation by the photoelastic method was determined according to the extrapolation method by Smith et al [13].
Stress intensity factors KI and KⅡ were determined by using equation in mixed mode deformation for materials with double reflection sensitivity according to the method of caustics14.
Conclusion This study conducted a tension test on specimens under the assumption that plural cracks occur in the material and determined the stress intensity factors by both caustics and photoelastic methods.
The factors were compared to each other and caustics of the increase and decrease of the K value of plural cracks were examined in terms of the distance between cracks, crack lengths, and the mixture ratio.

The microstructure and mechanical properties of CO2 laser welded as-cast AZ31 magnesium alloy sheet were investigated.
The microstructure and mechanical properties of weld joint were studied at present work.
The hardness of base material (BS), heat affected zone (HAZ) and fusion zone (FZ) of AZ31 magnesium alloy was measured by a HVS-1000 type hardness tester.
Shan [10] found that the heat input was the most important factor to influence the weld shape.
Analysis of Tensile Properties.