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In addition, some scholars tried to determine the key environmental factors with LAC when doing the electrical and electronic products eco-design, such as air pollution, remanufacturing and so on[3].
Eco-index99 model analyzed the weights of consumption of resources, destruction of the ecosystem and human health damage caused to the environment affect, but the weight factor over-reliance on the Netherlands and the surrounding areas with poor versatility.
The second step is to digitalize each indicator property.
Parameter is environmental effect value of environmental impact factors.
Chinese Journal of Mechanical Engineering2004(5):96-100

In the numerous factors influencing the durability of concrete, reinforcement corrosion is considered to be the most important.
However, the vast majority of concrete in service period is under load, dry-wet circulation, freeze-thaw cycle, chemical reaction, and a combination of many external factors [2].
All these effects, especially the load has a very important influence on the important parameters of affecting chloride ion penetration which are pore structure and the generation and expansion of micro-cracks [3,4].
Test factors are test time, load level and curing condition.
Conclusion Through the study of the law of chloride ion penetration under continuous pressure loads and corrosive environments, come to the following conclusions: (1)Test time, load level and curing conditions are important factors that affect chloride ion penetration depth and content in concrete.

In general, SGP is affected by a viscosity of bone fluid, flow rate, and interstitial pressure distributions.
Furthermore, it could be one of important factor inducing bone remodeling processes.
The interstitial fluid pressure generation characteristics in bone are functions of its poroelastic properties and boundary conditions.
The mostly important factors governing the interstitial fluid flow are the fluid and loading boundary condition.
Becker : Generation of electric potentials by bone in response to mechanical stress, Science.

In the deep drawing process, the blank-holding force (BHF) is an important process parameter affecting the energy consumption and the successful production of parts.
In the deep-drawing process, there are many factors that affect DF and wall thickness distribution, such as the clearance between die and punch, the tool geometry, lubrication conditions, and the BHF.
Table 1 shows the mechanical parameters of the investigated material [7].
Table 1: Mechanical properties of the AA6016-T4 aluminum alloy (thickness: 1.0 mm).

Overall performance is generally determined by three properties: comfort, support and durability. [1] Foam is always used as a component in a composite system, serves as the “bridge” material that can tailor itself to supplement the other materials like spring and fiber.
Table1 Factors level table of foam sample Factors levels Foam types Foam combinations 1 ①latex foam A(50mm) 2 ②ordinary foam B(20+30mm) Experiment mattresses are comprised of pocket spring layer, foam layer and composite fabrics layer.
In the physical properties of mattress, peak pressure and average pressure can reflect the firmness of mattress. [4] So, they are important indicators of mattress comfort.
The choice of mattress foams is very important to the design of mattress, and it directly affects the body pressure distribution properties of the mattress and human comfort.
China Mechanical Engineering.1997, 08(01) in Chinese

Ganesan [7] et al shows that the content of rice husk ash is one of the key factors affecting the performance of concrete, and the compressive strength of cement with 15% rice husk ash is the highest.
From the research of rice husk ash-cement-based materials at home and abroad, it can be seen that rice husk ash can improve the workability, mechanical properties and durability of concrete, but the research on the theoretical model of Cement-RHA blends is not deep enough.
Research on properties and mechanism of rice husk ash concrete[D].
Sugita, Study on the pozzolanic properties of rice husk ash by hydroChloric acid pretreatment[J].
Experimental investigation on properties of nano-SiO2/RHA/FA cement-based materials, 2013, 32(6):1017-1021(in Chinese)

In addition, the mechanical properties of concrete mixed with three different PCEs and their effects on the early hydration process and phase composition of hydration products were also investigated in detail.
Properties of cement paste.
The compressive strength of hardened concrete was measured after 3,7and 28 days of standard curing according to GB/T50081-2019 (Standard for test methods of concrete physical and mechanical properties).
Properties of concrete with PCEs.
As know, the importance of concrete workability could not be ignored, and the slump and slump retention ability were the very important factors to measure the concrete workability [36,37].

Analysis of the Adhesive-bonded Joint Stress in a MW Segmented Assembly Wind Turbine Blade Liu Lang 1,a, Li Gongyu 1,b , Sun Jie 1,c and Liu Qingbo 1,d 1Faculty of Mechanical and Electrical Engineering,Kunming University of Science andTechnology，Kunming 650093, China aliulanghn@gmail.com, blgy0203@sina.com, cjs5861975@126.com, dlqbxiaoyaofei@foxmail.com Keywords: adhesive-bonded joint stress; tress analysis; finite element method; glue line interface.
The material properties of the FRP and the foam core are anisotropic.
But many factors affect the adhesively bonded joint strength, in order to find an optimal balance between the various factors, need for further study and experimental verification.
[8] Duan Yuanxin, Zhang Kaifu, Wang Zhongqiang, MaYanyan, Peeling Stress Model and Analysis of Single—L Carbon Fiber Reinforced Plastic/Polymer/Al Composite Component, Joumal of Mechanical Engineering,2012,48-4

Welding residual stress will not only affect the stability of the dimensional accuracy and the body structure of the high-speed train body, but also the interactions with factors such as welding defects, affecting the strength and other properties of the welding of the body structure, reducing the safety and reliability of the structure of the vehicle body .
X-ray stress tester parameters (Cr target) Test methods The fixed roll Ψ0 method Tube voltage 20Kv Radiation CrKα Tube current 4mA Diffraction crystal surface 222 Given peak PearsonⅦ Diffraction angle 156.900 Filters V 2θ scan range 1200-1600 Stress constant －92.1MPa/deg Receiving slit (hole diameter) 1mm Exposure time 2s Welded joints ultrasonic impact treatment process The test selected from left to right respectively numbered A, B, C, D, E, each region has total of 33 measurement points, the distribution shown in Figure 1, the measured points covering the weld, the weld toe and the heat-affected zone.
The ultrasonic impact experiments to control the impact of time, the excitation current and ultrasonic impact head shape three variables, the specific process is as follows: A District-welded zone B 90s-1.5A impact state District C for 60s-1.5A shock state , D area for 90s-2.2A impact state District E 60s-2.2A shock state, weld and heat affected zone, the impact of the flat sheet type head, , the weld toe using round pounding head.
Compressive stress of each part of the value of the degree of release have different smaller compressive stress release value of the heat affected zone, larger weld toe seam compressive stress release value. 2.
Beijing: Mechanical Industry Press, 1982.

Although these results, and those reported elsewhere [10, 11] provide essential information about how ECAP processing affect key engineering properties of AZ series Mg alloys, none has focused on the wear behavior of the processed alloy.
Several factors such as pressure, temperature, sliding speed and chemical composition of the mating surfaces can define the outcome of wear events in a decisive way.
The goal of the heat treatment was to further improve on the mechanical properties (strength, hardness and some ductility) of the processed material via ageing techniques, i.e. inducing the precipitation of constituents held in the solid solution.
Rai and Pathak [13], discussed that wear mechanism in Ni-Cr-Mo-V steel is defined by three distinct factors dominant at the low sliding velocity and high sliding velocity.
Conclusion Clearly ECAP processing of magnesium AZ80 leads to improved wear properties in this alloy.