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Nonetheless, the disadvantages of premixed ball-milled powder are degraded flowability[10] and agglomeration of reinforcements, which causes metallurgical defects in the as-fabricated composites and severely affects the stability of mechanical properties of DRTMCs.
After determining the optimal process parameter combinations of current and scanning speed for the samples, the microstructure and mechanical properties of the sample were controlled by changing the scanning strategy, and mechanical properties of the sample were tested.
Hence, the design of EB-PBF feedstock can provide a promising channel for the higher mechanical properties of DRTMCs.
(2) The relative density of as-built composites produced by EB-PBF can reach 99.9%, but there are still exist a few defects in the components, which are the mainly factor of affecting mechanical properties of EB-PBF -composites, especially fatigue properties.
(3) In order to optimize the mechanical properties of DRTMCs prepared by EB-PBF, it is necessary to develop and utilize more accurate simulation tools to predict the relationship between mechanical properties and process parameters.

This report studied the influence of effects such as type, modulus, dosage of the alkali-activator on mechanical properties of slag-based geopolymer.
For now, at home and abroad, scientists undertook a large number of relevant study concerning about alkali-activator type, yield and modulus to the influence of mechanical properties of metakaolin-based and fly ash-based geopolymer [5, 6, 7].
Table 2 Influence of alkali-activator types on slag-based geopolymer’s mechanical properties at early age.
Influence of alkali-activator modulus on slag-based geopolymer’s mechanical properties at early age Fixed activator content is 12%, modulus respectively chosen 0.25, 0.5, 0.75, 1 and so on.
[5] Van JAARSVELD J S G,Van DEVENTER J S J,LORENZEN L.Factors affecting the immobilization of metals in geopoly-merized fly ash[J].Met Mater Trans(B),1998,29:283 -291

These challenges indirectly will affect the properties of the composites [4].
While Hashim et al. 2015 [5], in their study suggest that a few factors should be considered and improved to get the superior mechanical properties such as fiber orientation, fiber length, fiber content and processing parameter.
The properties of unidirectional Kenaf/PP composites may affected by a number of processing or material parameters.
Four factors (percentage of kenaf, processing temperature, pressing time and pressure) were identified will influence the mechanical properties of the composites.
[8] Ochi, S.: Mechanical properties of kenaf fibers and kenaf/PLA composites.

The environmental factors cause changes in the structural-mechanical properties of the concrete structure which can be divided into “internal” and “external” ones.
The external factors include those that act directly on the already formed structure of concrete in operating conditions.
These include mechanical, physical, chemical and other factors that affect the properties of the structure over time.
Introduction In the process of cement stone structure formation its strength increases, but as the structure forms and hardens, internal stresses arise that affect its properties.
The latter affect the concrete properties such as water permeability, corrosion resistance, etc.

The purpose of this study is to evaluate the physical-mechanical properties of the Tungsten Arc Welding (GTAW) process through numerical simulations of different welded joints between the 5083 and 6061-T6 aluminum alloys.
The results of the chemical composition test of the weld metal obtained that the composition is close to Al 5083 base metal so that the mechanical properties of the weld metal tend to be identical with Al 5083 alloy.
Defects in aluminum products reduce the mechanical properties of the alloys, but on the other hand, aluminum alloys can be increased in strength through heat treatment processes such as T4 and T6.
The current welding GTAW process is one of the determining factors to get the quality of welding results that meet the requirements [10-12].
The purpose of this study was to analyze the physical-mechanical properties based on the composition of alloy by GTAW welding process with different base metals through a numerical simulation.

It indicates that the anisotropy of thermo-hydro-mechanical behavior of the argillite rock is the main factor affecting temperature distribution，pore pressure and stress fields.
Nuclear waste repositories of surrounding rock temperature, not only affect the physical properties of rock mass, water, but also for the rock mass seepage field and water should also have an important role in the field of groundwater; at the same time, as a kind of environmental factors, physical and mechanical properties of rock mass and heat has the important influence on the transmission; on the other hand, the thermal physical properties of rock mass discontinuity and the (joints, faults, fractures) respectively on the heat transfer and seepage of groundwater plays an important controlling role.
There are mineral deposition rock joint surface on the hydraulic properties and Mineral chemical reaction on the rock mechanics properties also have a great impact on [6].
Effects of kinetic factors and mechanism of nuclear waste Considering the diffusion of water, due to the thermal gradient and thermal stress field, seepage field and three field interaction mechanism follows a field, temperature stress caused by water flow
The role of hydro-mechanical coupling in fractured rock engineering[J].

Welding thermal cycle of SMA490BW corrosion resistance steel with different heat inputs were simulated by using Gleeble-3500 thermo-mechanical simulator to investigate the grain size of the heat affected zone (HAZ).
Under the thermal effect of welding, evident change of microstructure and property in the base metal adjacent to the weld metal [2].Grain size is an important performance index, Grain growth is an important factor to welding metallurgy process and it shouldn’t be neglected, at the same time it often leads to welding heat affected zone becoming performance weak link, so grain growth in the welding heat affected zone directly affects the welding joint performance.
Influence factors of grain growth are the heating temperature and heat preservation time, heating speed, the chemical compositions of materials, the original organizations of materials and treatment conditions.
The chemical composition of the steel was listed in Table 1,and mechanical properties are in Table 2.
In general, the more tiny grain size is, the better mechanical propertiy is, therefore, SMA490BW corrosion resistance steel has good mechanical propertiy.

Influences of Isotropic and Anisotropic Material Properties on Stress Intensity Factors of the Crack Tip under Biaxial Stress T.
We determined the stress intensity factors of specimens using both photoelasticity and caustics method.
In this study, we conducted experiments to reveal how the anisotropic properties of polymer affect to the deformation behaviors in the vicinity of the crack tip under equal biaxial stress conditions.
Fig. 2 and Table 1 show the shapes, dimensions and optical properties of the specimens.
We examined how the isotropic and anisotropic properties of the polycarbonate materials affect differently the crack tip under equal biaxial stress using photoelasticity and the caustic method.

The failure mode of specimens shows that delamination of glubam caused by dry wet circulation is the main reason for mechanical properties degradation.
GluBam is essentially an organic material like timber and GluLam and it presents obviously properties aging under outdoor conditions, especially affected by dry wet circulation and biologic corrosion.
So the mechanical properties aging of glubam is a very important effect on safety and durability for modern bamboo structures under the outdoor conditions.
In this paper, mechanical properties aging tests were conducted on deformation properties, tensile properties, compressive properties, bending properties and internal bonding performance.
Aging influence factor β is defined to research the correlation between basic mechanical properties and equivalent aging time.

Mechanical properties of the composites were tested, such as MOR, MOE by universal material testing machine.
The result showed that rice-straw particle /HDPE composites have relatively good mechanical properties.
Zhang Donghui studied that mechanical properties of straw-powder/PP composites [7].
The rice-straw particle /HDPE composites have relatively good mechanical properties.
The mechanical properties of the composite material improved by adding titanate coupling agent. 2.