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Introduction The dynamic response of pavement, bridge and railway facilities is an important influencing factor for structure safety of pavement, bridge and railway.
The studies on vehicle dynamic loading affecting pavement structure had achieved in Europe and North America during 1950s.
Mechanical parameters of asphalt concrete are affected not only by aggregate but also by asphalt.
Researchers in road-engineering field often use dynamic modulus to characterize dynamic property of asphalt concrete when dealing with dynamic response of pavement structure.
Finite Element Model Based on the above-mentioned factors: pavement structure (shown as Fig. 1), mechanical parameters (presented in Tab. 1), inflation pressure of tire (0.7MPa), type of truck (Dong Feng EQ1168G1) and vehicle loading capacity (25,000kg), the finite element model of vehicle has been built.

In this study, the orthogonal arrays L9 was adopted (see Table 1), it has nine experiments, three levels, and four influence factors.
Factors Levels Level � Level � Level � A.
The experimental levels and factors in the graphite-polymer composite.
Factors Levels Level � Level � Level � A.
The experimental levels and factors in the LDPE.

and are scale factors to normalize magnitude.
and are weighting factors for the first and the second terms in the penalty function.
Material properties of Al 2219 alloy are as followings; density (2,800 kg/m3), modulus of elasticity (72 GPa), Poisson’s ratio (0.27), ultimate strength in tension (440 MPa), and yield strength in tension (360 MPa).
Deck unit is not affected by the vehicle loads.
Also, weighting factors,and , are evenly 1.

It is a mixture of plant aggregates (straw fibers) with a lime binder and additives of natural origin (Ismail et al., 2020) Straw biocomposite may have very interesting thermal properties (Belayachi et al., 2013) but its mechanical properties are low due to its low proportion of binder and the low fiber-binder bond, which makes it more vulnerable to external attacks, whether mechanical or climatic.
Tab. 1: Mixture proportions (by mass) and biocomposites properties Formulation W/L S/L AE/L C/L BP/L Density (Kg/m3) Porosity (%) Vapour diffusion factor SBLAP 1,1 0,3 0,05 0,025 - 312 79 8,35 SBLBP 1,1 0,4 - - 0,2 294 - 8,45 RC 1,1 0,2 - - - 450 74 - W: water, L: lime, S: Straw, AE: air entraining agent, C: casein protein, BP: biopolymer - Protection coating For the protective coatings, lime-based mortars with optimal formulations in terms of mechanical strength and thermal performance were used (Brahim Ismail, 2020).
Tab. 2: Mixture proportions of protective coatings (by mass) and material properties Mortar W/L S/L AE/L C/L Density (Kg/m3) Porosity (%) Vapour Diffusion factor OPT 0,55 - 0,05 0,025 1080 66 6,72 OPTF 0,825 0,075 0,05 0,025 794 68 8,35 W: water, L: lime, S: Straw, AE: air entraining agent, C: casein protein 2.2 Samples preparation The preparation of the study samples begins with the preparation of biocomposite substrates measuring 30x30x10 cm3.
· Aging cycles with salt caused a huge degradation to the system with fiber mortar (OPTF) which showed a significant development of cracks and a decrease in mechanical strength.
Thermo-mechanical behaviour of an innovant straw lime composite for thermal applications.

The use of modifiers or additives in the asphalt mixtures is a suitable and common method for improving their mechanical properties especially under high temperature service conditions.
The properties of crumb rubber are shown in Table 4.
The properties of this polymer are summarized in Table 5.
Table 6 presents the properties of sasobit used in this research.
The properties of STARDOP 130 P can be seen in Table 7.

Pervious contributions revealed that there were several instrumental factors that affect the release profiles from within the ceramic reservoirs or matrices.
This observation alarmed us to test the mechanical properties of the retrieved capsules at the end of each phase.
Mechanical properties of all capsules were tested initially and after 24, 48 and 72 hour post exposure.
The TeCP capsules made from particle sizes of <38 showed slightly greater mechanical strength (three way bending/cold press) properties than the capsules made from 45 and 75 um.
After 72 hours, the capsules made from <38 um particle sizes had the highest mechanical strength properties.

The following factors make thermal spraying competitive in contrast to hard chrome plating: • Capital cost - capital expenditures relative to the construction of installations with the same production capacity is much higher for hard chrome electroplating than for thermal spraying
• Background - process stability with well known properties and known limitations
Individual applications can be adapted to the material, depending on the specific requirements of corrosion, wear, service temperature or other factors. 2.4.
The tests showed that coatings exhibit fatigue properties equal to or better than the electrochemical chrome plating.
Conclusions The experimental research undertaken in this paper aimed to analyze the possibilities of extending the application of HVOF spray process for depositing layers with outstanding properties in wear and corrosion resistance, as an alternative to chrome electroplating.

The enhancement of mechanical properties obtained in the studied soil-fiber systems demonstrates the potential application of these composites in geotechnical works.
In this sense, a lower probability of reorganizing and a good interconnection of soil particles are important factors in obtaining higher values of the shear strength parameters [42].
Syamsir, Response Surface Methodology: The Improvement of Tropical Residual Soil Mechanical Properties Utilizing Calcined Seashell Powder and Treated Coir Fibre, Sustainability. 15(4) (2023) 1-29
Pacheco, Improved mechanical properties of a high plasticity clay soil by adding recycled PET, IOP Conf Ser Mater Sci Eng. (2020) 1-6
Wilson, A Novel Technique to Utilize Second Waste of Plastic Bottle as Soil Reinforcement: A Comparative Study on Mechanical Properties with Natural Black Cotton Soil, Advances in Civil Engineering 2022 (2022) 1–8

The purpose is to realize the mechanical or electrical connections between components, sealing and protection.
These factors lead to the precise control difficult to the amount of fluid coating to the substrate and the poor volumes consistency.
(7) Control of Liquid Dots Volume of Dispensed Fixed the dispensing equipments and dispensing period T, and assumed the liquid properties also without changes in the dispensing process, according to the developed liquid dots volume model, the dispensed dots volume W is the function of the source pressure Pc, solenoid valve open time t and the syringe air chamber volume Vr, that is W = f (Pc, t, Vr).
Simulation and Results Due to the influence of random factors, the repeatability of the experimental results was very poor for the micro-dispensing system.
References [1] SUN Daoheng, GAO Junchuan, DU Jiang, JIANG Yiwen, TAO Wei, WANG Lingyun: China Mechanical Engineering.

After machining, a large number defect of shrinkage cavity and porosity can often be found in the groove and hub of the pulley roughcast (see Fig.1), and sometimes even in every pulley roughcasts, which serious affects the mechanical properties and performance of pulleys, or even scraps them.
The influencing factors of the defect of shrinkage cavity and shrinkage porosity Casting structure The roughcast at issue is a kind of heavy casting.
The Investigation of Influence Factors on Shrinkage and Microporosity Defects in Nodular Iron Casting.
Beijing: Mechanical Industry Press(1992),p. 41-42 [6] Casting Professional Institute of Chinese Mechanical Engineering Society, Casting Handbook (Volume 5) [M].
Beijing: Mechanical Industry Press(1994),p. 172 -193; 355-358