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Mechanical properties of the porous titanium were investigated using a compressive test.
So in the present work, a simple chemical treatment was applied to porous titanium, and the structure changes were observed and the mechanical properties were studied.
According to their model, the single most important factor affecting the mechanical properties is the relative density, and the relationships between the plateau stress, elastic modulus and relative density are given by (1) (2) where E is the elastic modulus of the porous solid, Es is the elastic modulus of the dense matrix material, σpl is the plateau stress of the porous solid and σys is the yield strength of the dense matrix material.
A regression analysis of the mechanical properties of porous titanium was performed and revealed that the relationship between the mechanical properties and the relative densities of the as-sintered porous titanium conforms to the model when C3 equals 0.816 , n1 equals 3.835, C4 equals 2.382 , n2 equals 4.199 (as shown in Fig. 5).
Therefore, the mechanical properties can be predicted by this mode and desired mechanical properties can be obtained by adjusting the relative density of porous titanium.

The mechanical properties of rolled billets were determined: ultimate tensile strength σU, offset yield strength σ0.2 and elongation δ50.
In this case, There is mechanical and electrical wear, local overheating, vibration and adverse environmental factors To increase the speed of railway transport, there is a need to increase the tension of the contact wire in order to ensure the stability of the contact pressing of the current collectors of the rolling stock.
The mechanical properties were determined on a Zwick Roell tensile testing machine at a test speed of 2 mm/min.
This corresponds to well-known ideas about the cold rolling effect on the level of metal mechanical properties [14-18].
The nature of the change in the mechanical properties level of CuSn0.2, CuSn0.4, and CuSn0.6 alloys is similar to the nature of the change in the properties of copper.

And then we study the excellent mechanical property of the carbon nanotube fibers.
Introduction Carbon nanotubes (CNTs) are an extremely interesting type of material due to their unique structure, and their excellent mechanical, thermal, and electrical properties.[1-4] Many promising applications have been demonstrated.
The mechanical properties of the aligned CNT fibers were characterized by a Shanghai Hengyi Testing Instrument.
Generally, affecting the carbon nanotubes fiber strength factors include wall number, diameter and length of carbon nanotubes, internal orientation, defects and the content of impurity of fibers.
These CNT fibers exhibit excellent mechanical properties.

Titanium alloy Ti6Al4V is one of the most utilized alloys in the field of additive manufacturing due to the excellent combination of mechanical properties, density and good corrosion behavior.
Qu, Effect of Build Orientation on Mechanical Properties and Microstructure of Ti-6Al-4V Manufactured by Selective Laser Melting, Metall.
Tuck, Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti-6Al-4V, Mater.
Eshraghi, Effect of Build Orientation on the Microstructure and Mechanical Properties of Selective Laser-Melted Ti-6Al-4V Alloy, J.
Fratini, Sample building orientation effect on porosity and mechanical properties in Selective Laser Melting of Ti6Al4V titanium alloy, Mater.

Composites; Mechanical Properties Abstract.
The , k, of each factor were calculated according to the tensile strength and impact strength, thereafter, the pictures of k plotted to factors and levels were drawn.
It can be seen from table2, table3, picture2 and picture3 that the important order of relevant factors that affect tensile strength and impact strength is: treatment temperature(C) > PA amount (A) >ultrasonic treatment time(B).
However, further prolonged ultrasonic pre- treatment time can exert negative effects on the modification, it is because too long a ultrasonic mechanical treatment time reduces the strength of fiber, leading to an inferior mechanical properties of composites.
Picture 2 Effects of factors and levels on the tensile strength indicates Picture 3 Effects of factors and levels on the impact strength indicates Conclusions PA was used to modify the fiber reclaimed from old newspaper under the condition of ultrasonic radiation and the treated fiber was mixed with PLA to get the composites, whose mechanical properties were tested later.

Based on the results, welding current was found to be most effective parameter affecting shear strength and nugget size.
The important changes occur in mechanical and metallurgical properties of the spot welds area during the spot weld process.
The shear strength of lap joint of spot welds is a complex phenomenon which depends on several factors, namely, welding parameters and base metal properties.
The chemical composition and mechanical properties of workpiece is listed in Table 1.
Chemical compositions and mechanical properties.

The research on the corrosion and its effect on the mechanical properties of reinforcing bar are increasing [6-8].
The samples have two sizes: short samples (Φ14mm×20mm) used for corrosion morphology observation, and long samples (Φ14mm×450mm) used for corrosion rate measure and mechanical properties tests.
The tensile mechanical properties, including yield strength, tensile strength and elongation, are tested by a hydraulic pressure universal testing machine.
For long samples, corrosion rate calculation and mechanical properties tests are made after they are immersed in thin hydrochloric acid to remove the scale on the surface.
These will affect the strength properties of reinforcing bar.

The resistance spot welding process represents the welding technology used to obtain assemblies trough welded spots characterized by adequate mechanical properties.
As input factors, in this study, the values of current intensity, the electrical current time and the force pressure were considered.
Introduction The mechanical performances such as durability and structural behavior of most mechanical assemblies used in automotive engineering depend on both their mechanical design and the mechanical properties of the parts and also, not at the last, on the conditions of joining components.
This fact can affect microstructure and mechanical properties of the metallic parts joined [1].
Zhou, Microstructure and mechanical properties of resistance spot welded advanced high strength steels, Materials Transactions, Vol. 49, No. 7, (2008 1629-1637

Based on the studies of ordinary concrete, the drying shrinkage are affected by many factors such as cement type and content, water to cement ratio, aggregate type and content, and curing environmental condition et al [1, 2].
The ordinary silicate cement of grade 42.5 with qualified stability and the proto -machine-made sand crushed from limestone are used with properties listed in Table 1 and Table 2.
The crushed limestone in series of 5 mm-10 mm and 10 mm-25 mm is mixed in proportion 1:1 with physical and mechanical properties shown in Table 3.
Table 1 Physical and mechanical properties of cement Grade fineness (%) Water content of standard density (%) Setting time (min) ft (MPa) fc (MPa) Initial Final 3d 28d 3d 28d 42.5 2.8 26.9 257 316 4.7 8.7 23.3 47.7 Table 2 Physical properties of proto-machine-made sand Fineness modulus Apparent density (kg/m3) Methylene blue value (g/kg) Stone powder content (%) 3.19 2740 0.25 5.0 Table 3 Physical and mechanical properties of crushed stone Apparent density (kg/m3) Pile-up density (kg/m3) Crushed index (%) Mud content (%) Content of needle –pieces (%) 2765 1498 8.8 0.5 4.0 Mix Proportion of Concrete.
Analyses of Test Results Shrinkage affected by stone powder content.

If leakage, cracking, explosion and other accidents occurred, it will easily lead to major casualties and property damage, affecting public safety and social stability.
So, the safety of CNG cylinders has become a key factor affecting the healthy development of CNG cars.
As we know, the quality of materials, including mechanical properties, physical properties, chemical propertie, is directly related to the life and safety of components, devices or articles.
Tensile properties.
Mechanical properties of the two Cr-Mo steels Fig 2 Mechanical properties of the two Cr-Mo steels (a) Rockwell hardness (b) Tensile properties Fig.2 displays the mechanical properties of the two Cr-Mo steels.