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In fact, concrete structures under fatigue loading usually also face the combined threat of environmental factors.
Then the resistance ability of the concrete to the outside corrosion medium will be affected, which means the durability of the concrete will be influenced obviously.
It has been verified that when cyclic loading frequencys change among 5 Hz to 15 Hz, their influence on the mechanical property of the concrete is negligible [5-7].
Pore is one of the important components of the micro-structure of concrete, which has important influence on the macro-properties of the concrete [8].
Influence of Static and Dynamic Mechanical Load on Durability and Service Life of Reinforced Concrete Structures, Ph.D.

One example is the addition of plastic fibres to road construction to enhance their mechanical properties [5].
The HDPE is then processed through mechanical recycling, involving shredding and extrusion into filaments and pellets.
When tests were conducted with a 1.2mm nozzle the flow rate of the material would be affected by the contamination leaving defects.
Future research must address factors like durability, UV resistance, fire safety, and health risks to scale this technology.
Hernandez, ISRN Mechanical Engineering 2012 (2012) 1–10

A Study on the Construction Method of Product Image of the Brand Enterprises Fa Shen1, a and Faren Huo2,b 1,2School Of Art and Design, WuHan University Of Technology, 430070,Wuhan,Hubei, P.R.China 2 Faculty of Mechanical Engineering and Mechanics, Ningbo University, 315211, Ningbo, Zhejiang, P.R.China ashenfaid@163.com, bhuofaren@nbu.edu.cn Keywords: corporate brand image, product image, design methods Abstract.
Therefore, when the company considers the brand image building, they must take the product image that the consumer needs as the core factor but not stress on the visual image.
Similarly, it makes use of every side of one product design to strengthen brand products on certain properties on feelings and generate some kind of familiar and experience.
This study which is based on preliminary investigation, basic research and lots of design practices tells that we can solve the two difficulties from the following several aspects: The unity of the total factor.
In the design and the feeling preferences, if the new product image has severe changes, consumers will be away from the products they have been using in the past, which will result in consumers’ confusion about preferences and even affect their trust in corporate brand.

Although the rubber pressure may accurately obtained in the current experiment case, the relation between packer rubber and casing tube is influenced by the local change of the tube structure, which leads to the decrease of the tube strength, and furthermore, the ideally smooth casing wall is disturbed due to the existence of the testing sensor, then the change of the friction force may affect the compressing length of the packer rubber which finally leads to the data deviation of the normal pressure.
Considering the hazard of high pressure hydraulic experiment in the laboratory, the setting type is set as the mechanical instead of hydraulic, so that the setting load is consistent with the practical application.
Table 2 Friction force and normal pressure under variant pressure Wellhead pressure/Mpa Rubber cylinder decrement/mm Ff/N Fn/N 4 35.4 5869.8 6437.6 5 37.9 8477.4 9681.3 6 41.5 12079.5 11900.8 8 40.9 16278.3 22147.4 10 42.5 18882.1 33735.8 12 44.6 21059.1 48567.7 15 43.1 23792.4 76555.1 17 44.4 32040.3 78159.8 Experimental result and application The least square method is applied in the formula of friction and suppression pressure of single packer: (1) (2) where Ff, Fn are named respectively as the friction force and normal pressure of the packer and casing tube, whose unit is N, P is named as setting pressure, whose unit is Mpa, λ is engineering correction factor that can be valued between 0.688 and 1, e.g., if the injection fluid contains much of oil, the friction between rubber and casing tube may action, then the factor may be valued 0.688, by which the friction is calculated as 2.2t and the normal pressure increase to 13.1t.
Relationship Between Hydraulic Conductivity and Fracture Properties Estimated from Packer Tests and Borehole Data in a Fractured Granite.

Observation profile selection.Comprehensive consideration the factors of drilling observation before mining, observation possibility after mining and the integrity of surrounding rock in drilling hole, the observation profile will be set up in the central lower layer, is on track up the mountain mining area location.
Table 1.Construction elements of drilling hole number hole diameter elevation hole depth complete time mm m 1# 89 70° 65 before mining 2# 89 60° 70 before mining 3# 89 45° 85 60 days after mining 4# 89 50° 80 60 days after mining Research on the height of overburden crack belt Observation result of the height of overburden crack belt.The maximum height of overburden crack belt in addition to mining thickness, layer number of mining, mining methods, roof control methods and coal occurrence is closely related, but also cover the overburden structure and mechanical characteristics [4].
(a) (b) (c) (a)advance distance 0m (b)advance distance 20m(c)mining finished Fig.1 Plastic damage range of upper layered face mined (a) (b) (c) (a)advance distance 0m (b)advance distance 20m (c)mining finished Fig.2 Plastic damage range of lower layered face mined Simulation results analysis.The simulation results show that the change of plastic zone of overburden structure affected by mining directly illustrates the disturbed range of roof strata after seam mining.
The destruction of upper strata is not continuously and the crack belt height is about 33.6m because of the differences in rock properties.

There have three kinds of methods of transforming mechanical vibration into electrical energy: electrostatic, electromagnetic and piezoelectric.
The factors and relationship of energy conversion under the dynamic traffic loads were studied[2].
The harvesting properties of the existing harvesters[5] and some piezoelectric harvesting systems were proposed [6-8].
Its main disadvantage is that the generated electricity is affected by weather.

It is found that the effect of the input parameters on the electrode wear was affected by 5 input peters in descending order: the pulse on time, the pulse off time, the servo voltage, the pulse current, and the nano powder concentration.
Calculated and experimental results Objective properties Optimum process parameters Calculation Experiment Error (%) Ton2/Cp3/Toff3/IP1/SV3 Ton2/Cp3/Toff3/IP1/SV3 Electrode wear (g) 0.0103 0.0087 15.5 5.
International Journal of Mechanical Engineering and Robotics Research. 4(9): p. 28-30
[13] Huo, J., et al., Influence of process factors on surface measures on electrical discharge machined stainless steel using TOPSIS, Materials Research Express. 6(8) (2019)

The objective of this workwas to characterize the basic operating properties of a gasifier-based biomass cookstove using different types of biomass fuels.
In this paper, basic operating properties of gasifier-based biomass cookstove using different type of biomass fuels were evaluated.
Theoretically, almost all kinds of biomass with moisture content of 5-30% can be gasified [5].Constituents in the product gas and the gasification design are affected by the chemical composition of biomass fuels.
Other similar stoves efficiencieswere in the range of 25-35% [7].The low efficiency of stove in this work was likely to be related to the poor circulation of air due to design factor.
Fig. 5: Stove efficiency for different biomass and tests Conclusions The present work attempted to characterize the basic operating properties of gasifier-based biomass cookstove using different types of materials.

Numerical Simulation of Quenchant Flow Characteristics in Large Quench Tank Hui Sun College of Mechanical Engineering, Shanghai Dianji University, Shanghai, China sunh@sdju.edu.cn Keywords: flow field, large quench tank, numerical simulation Abstract.
Introduction Quenching is an important technological process that involves the cooling of a heated workpiece in order to modify its properties [1].
Moreover, the flow field in the quench tank is closely related with varied factors, such as quench tank structure, agitator system and workpiece, which make it very difficult to acquire the detailed flow field information by experimental method [2].
The above figures suggest that, adding an inner core in the center zone of the tank does also not affect the flow field in the quench tank significantly, but the central stagnant flow zone further minished.

Introduction Sulfur is a harmful element in the liquid steel in general, sulfur in the liquid steel is easy to react and produce inclusion like manganese sulfide, ferrous sulfide and so on, affect the mechanical properties of the steel seriously.
Analysis found that in the process of RH treatment, SiO2% have small changes , within 1%, main factors that change basicity is the consumption of CaO for desulfurization.