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When the FIBC was affected by environment factors synthetically under using, such as light, heat and air etc, it would come into degradation and its mechanical properties reduced.
The mechanical properties of polypropylene FIBC base material are important factors that ensure its safe storage and transportation.
When the FIBC is affected by environment factors synthetically under using, such as light, heat and air etc, it would come into degradation and its mechanical properties reduced.
Fabric mechanical properties.
Mechanical properties change.

Of these thermal factors, the cooling rate is influenced by different process variables that affect the feeding behavior of the castings during solidification.
It is accepted by most of the researchers that the faster the cooling rate, the better the mechanical properties of the castings. [3] However, the faster cooling rate also caused insufficient feeding in casting, which will affect mechanical property of castings.
That maybe caused by some other factors.
Berry, A Re-examination of factors affecting porosity gradients in unidirectionally solidified samples, AFS Trans. 116 (2008)157-168
Smaliuskas, A.Petro, R.A.Flinn, Variable affecting chromite sand performance in molds, AFS Trans. 88 (1980) 683-694

Aiming at the mechanical property abnormality of a certain cylinder test piece for aerospace application, scanning electron microscope and metallographic microscope were used to observe and analyze the fracture and weld structure of test pieces under tensile test, and the reason of property abnormality was determined.
When texture structure exists inside aluminum alloy, mechanical property along the texture direction is better than that of transverse direction [2]-[3].
The direction of the fracture in the arc zonal fracture region is consistent with that of transverse properties fracture of the texture.
There are mainly two factors leading to the formation of the metal texture structure.
Microstructures and mechanical properties of friction stir welded joints of Aluminium alloy thick plate with different welding states [J].

Meanwhile the physical-mechanical properties of original loess also are significantly influenced by the acid rain.
It is necessary to explore the changes of physical-mechanical properties of loess contaminated by acid.
However, there are few studies on the physical-mechanical properties of loess polluted by acid.
The reasons are as follows: the main influencing factors of loess compaction density is the material composition and structure.
Liquid limit and plastic limit are two important parameters affecting soil properties, which reflect the size composition and material components of soil, and it is closely connected with the strength.

The study of technological factors affecting the aging and performance of pumpjack helps to optimize maintenance processes and prevent unexpected breakdowns, which leads to lower operating costs.
Changes in the properties of the produced fluid, such as viscosity and temperature, can affect the loading of the pump's mechanical components and increase the risk of corrosion.
For this, the properties of the fluid must be monitored, measures must be taken to manage the variations, for example, the pump parameters must be adjusted accordingly.
Incomplete filling of the cylinder, due to two factors.
Conclusion It has been determined that the factors affecting the pump flow ratio in the petroleum industry include deformation of the rod string and tubing column, fluid compression, incomplete cylinder filling, and leaks in valves and plunger pair.

Effect of Corrosion on Mechanical Properties of Reinforcing Bar HPB235 Ying Wang1, Ping Li1, a 1Department of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China aeappol@163.com Key Words: Reinforcing Bar, Corrosion behavior, Corrosion rate, Mechanical properties Abstract: The corrosion behavior of reinforcing bar HPB235 in simulated concrete pore solution (3.5 wt.% NaCl solution) was investigated, and the tensile mechanical properties before and after corrosion were tested.
The research about the corrosion of reinforcing bar and its effect on the mechanical properties of reinforcing bar are increasing [7-10].
The tensile mechanical properties, including yield strength, tensile strength and elongation, are tested by a hydraulic pressure universal testing machine.
These will affect the strength properties of reinforcing bar.
Maybe the effect of stress concentration on each strength property is not familiar, or there can be other affecting factors.

The significance sequences of technology parameters affecting SCI are factor A, E, C ,B and D.
Thereby, the paper presents the relational model of the main factors affecting SCI and analyzes experiments results via orthogonal design of experiment, it will offer technical supports for surface quality control of metal forming.
Based on the sum of mean deviation, significance sequences affecting SCI is E>A>C>B>D.
The results show that significance sequences of technology parameters affecting SCI are factor A, E, C, B and D.
Final results show the superior parameter affecting SCI is , the inferior is E(holdblanker force), yet factor E can be neglected according to forming conditions.

Influence of Alkali Treatment on Properties of Casein Grafted Acrylonitrile Fibers GAO Jing College of Textiles, Donghua University, Shanghai 201620, China Engineering Research Center of Technical Textile, Ministry of Education, Donghua University, Shanghai 201620, China gao2001jing@dhu.edu.cn Key words: Casein grafted acrylonitrile fiber; alkali treatment; Chemical component; mechanical properties Abstract.
At the same time, the mechanical properties of the fibers treated by alkali at various pH values were tested, and the intrinsic and extrinsic factors affecting fibers mechanical properties were analyzed.
Fibers mechanic properties are measured by the LLY-06 type of single fiber electronic tensile tester of Laizhou electronic instrument Ltd., (Pre-tension 100mg，down speed 10mm/min，gauge 10mm).
The alkali affected little at the moment.
(a) (b) (c) (d) Fig.1 Fibers mechanical properties after alkali treatment.

Some of the properties affected by this modification are those related to mechanical behaviour.
In these kinds of parts a very tight safety factor is used, that’s why to know exactly material properties is very important during its design.
Recycled material has lower mechanical and aesthetic properties.
- The variation of mechanical properties of the material used in this type of part is important for the functionality of containers and they are designed with adjusted safety factors
Conclusions The addition of different percentages of recycled material to raw material for injection moulding processes implies a change in the mechanical behaviour of the material, affecting the safety factor in stress.

According to processing and analysis of the experimental data, we can conclude that: As the temperature of raw rubber increased, the physical and mechanical properties of the tread had changed.
The factors affecting physical and mechanical properties of vulcanized rubber were many.
From above analysis, we could conclude that the tread had better overall physical and mechanical properties in the preheating temperature 60℃ of raw rubber.
Summary The experiment had studied the influence by preheating of raw rubber on the mechanical properties.
When the preheating temperature was about 60℃, the vulcanized rubber had the best physical and mechanical properties.