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Properties of the dynamic strength of the materials can then be derived from the stress strain curves under different strain rate loadings.
Conclusions Compression tests have been performed on two different materials of distinctively different properties.
ASM Handbook, Mechanical Testing, Vol. 8 (1985). 3.
Tweeddale, The Mechanical Properties of Metals.
Burgan, Elevated temperature and high strain rate properties of offshore steels, Health and Safety Executive (UK 2001). 8.

Review of the Properties of Lightweight Aggregate Concrete Produced from Recycled Plastic Waste and Periwinkle Shells Anthony N.
Jaivignesh and Sofi [10] carried a study on the mechanical properties of concrete using plastic waste as an aggregate and found out that the reduction of the compressive strength is as a result of the decrease in adhesive strength between the waste plastic and the cement paste.
Properties of concrete containing different type of waste materials as aggregate replacement exposed to elevated temperature – A review Properties of concrete containing different type of waste materials as aggregate replacement exposed to elevated temper, IOP Conference Series: Earth and Environmental Science, 140, (2018) 215–221
Influence of bamboo fiber and limestone powder on the properties of self-compacting concrete, Cogent Engineering, 7(1), 1721410 (2020)
Sofi, Study on Mechanical Properties of Concrete Using Plastic Waste as an Aggregate.

Inappropriate construction leads to pipeline damage, which cause serious damage to the safety of State property and people's lives.
It considered stress release of excavation side, shield-tailed deformation of void and grouting and lining deformation and lining weight and other factors in the calculation.
Various factors were fully taken into account in the calculation, such as excavation face roof pressure, stress release, shield-tailed void, grouting, lining deformation and lining weight, etc.
The general practice is based on the analysis of influencing factors of underground pipeline[6], using empirical method, engineering analog method or numerical simulation method and so on.
Fig. 1 Construction cross section schematic drawing Fig. 2 Tunnel cross section schematic drawing Geological Conditions and Mechanical Parameters.

The influence of these mechanical treatments on the transition temperatures and the hysteresis evolution was also analysed by following the integrated intensity of the {220} reflection of the austenitic phase.
This property is due to the austenite-martensite phase transformation which can be induced thermally by a cooling or mechanically by applying a load.
For these alloys, transformation temperatures are of importance factor for the behaviour of the material and can be affected by several parameters (microstructural defects, grain size or residual stresses) [2].
In this study we propose to investigate on a copper based alloy the influence of the mechanical deformation by cold and hot rolling on the microstructure evolution by following the texture variation with the rate of deformation and how this modifies the characteristic transition temperatures.
This mechanical treatment thus introduces metastable residual martensite due to inter-and intragranular stresses generated by deformation incompatibilities between grains with different orientations and by transformation strains.

Introduction Heavy metals and pathogens are two major limiting factors in sewage sludge application to agricultural land [1].
Details on the physicochemical properties of coal fly ash and sewage sludge are listed in Table 1.
Results and Discussion Zn, Cu, Ni and Cd concentration in each fraction of the fly ash and calcium oxide stabilized sludge Chemical forms of heavy metals in soil is affected by pH, redox potential (Eh), organic matter, and other factors [11, 12, 13].
Improvement of biomass growth could be explained by increase in nutrients and also improved soil physical properties.
Uptake of heavy metals by plants are not only influenced by their concentrations in soil, their chemical forms, physicochemical properties of the soil, but also by plant nutrition, stage of growth, and other factors (Chlopecka, 1996a, 1996b).

The grinding heat directly affected workpiece surface in the grinding process and it might produce some defects such as crack and burn.
Experiment on the nozzle angle influencing to the surface integrity Affected by the grinding wheel surface layer rotary airflow, different spray angles would affect the ratio of grinding fluid flow that enters into the contact area directly.
And it will affect the grinding workpiece surface integrity directly.
Specific properties of air flow field within the grinding zone [J], Journal of Wuhan University of Technology,2006,(28): 307~309
Study on properties of grinding fluid jet and nozzle position limit during quick-point grinding[J].

If these interface properties can be determined, it should then be possible to significantly enhance current models of the vibration of engineering assemblies.
If these interface properties can be determined and their variation with load, frequency etc. understood, it should be possible to significantly enhance current models of the vibration of engineering assemblies [8].
Repeatability of measurements is an important factor when characterising the properties of frictional joints, and it is helpful to determine how the results might change if a joint is reassembled (with new material and new surfaces ground to the same specification) and tested with the same experimental parameters (i.e. contact pressure, number of cycles, displacement amplitude, geometry etc.).
International Journal of Mechanical Sciences, vol. 50 (10-11), pp. 1519-1525
Determination of the Frictional Properties of Titanium and Nickel Alloys Using the Digital Image Correlation Method.

The factory hardness is up to HB344-400, and its chemical composition and mechanical properties are shown in Table 1 and Table 2.
Table 1 Chemical composition of NAK80 Element C (%) Si (%) Ni (%) Mn (%) Mo (%) Cu (%) Al (%) Cr (%) Content 0.15 0.3 3.0 1.5 0.3 1.0 1.0 0.3 Table 2 Physical and mechanical properties of NAK80 Material Temperature (℃) Tensile strength (Mpa) Elongation (%) Contraction of area(%) Yield (Mpa) Modulus of elasticity(Gpa) NAK80 25 1319 14.6 51.2 1186 199 (2) The test is carried out on the VMC0745 machine, shown in Figure 1.
The L27 orthogonal table composed by the three levels of each factor is shown in Table 4.
Journal of mechanical engineering, 2009, 45(5): 230-236
Electro-mechanical engineering, 2010, 26(1): 1-9

Depending on the integrity of its design and material properties, the coil spring can return to their original shape and size when the force is released [4].
NS ≥1.2 Where NS is given as the factor of safety at closure.
High corrosion resistance Material Properties Table 2 shows selected material properties for high carbon steel, stainless steel and Chrome vanadium which are the three major materials analysed in this study.
The loading conditions discussed in this study are not the only factors that affects the performance of a typical helical compression coil spring but other factors such as inherent defect in the raw material (prior to manufacture), improper heat treatment, decarburization, inclusion, surface imperfections due to poor shot peening can also constitute to spring failure.
[15] Acxess Spring, Properties of Common Spring Materials for Spring Wire.

The suspension mechanism is fixtures of the whole construction platform equipment, its reliability not only affect the construction platform construction process directly, but also to the safety of the lives of persons.
According to the structural analysis of the suspension mechanism, the mechanical properties of the overall structure effected by the three parts is smaller
Mechanical model of suspension mechanism is simplified the rigid frame structure.
(3)Square steel tube is employed in traditional beam structure of suspension mechanism.The optimization program data shown,rectangular steel is more suitable from mechanical properties.
(In Chinese) [4] Edited by Daxian Cheng: Handbook of Mechanical Design(Fifth Edition)The First Volume (Chemical Industry Press，China,2008).