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The biodegradability of this polymer contributes to butylene adiapte part, whereas terephthalate play an important role on stability and mechanical properties [21].
Keller, Temperature dependence of mechanical properties of poly (beta-hydroxybutyrate- beta-hydroxyvalerate), Polym.
Wang, Thermal properties of PHB/PEG blends, J.
Thomas, Blending polylactic acid with polyhydroxybutyrate: the effect on thermal, mechanical, and biodegradation properties, Adv.
Russo, Optical and mechanical properties of UV-weathered biodegradable PHBV/PBAT nanocomposite films containing halloysite nanotubes, AIP Conf.

It has formed the power station boiler is different from other important features such as industrial boilers, namely the power plant boiler metal parts run time of the four important factors: time, high temperature, stress and medium.
Therefore, within the scope of boiler parts after a period of time after the operation, often there will be a failure, seriously affect the safety of the unit.
Power plant boilers when choosing materials, on the other hand, is based on the mechanical properties of the short-term material parameters and the long-term mechanical properties.
For example: overheating tube for a long time, its main card to analyze metal microstructure, cracking-off morphology; Circumstantial evidence and analysis of chemical composition, mechanical properties, etc., to rule out other causes, such as whether due to wrong with steel tube and so on. 6.3　A comprehensive understanding of the background of the accident, failure analysis, should attend all the analysis of the wreckage, select a representative sample.

The cause of tension yarn breaks is always excessive spinning tension, which affects the weakest yarn point i.e. the point, between the take-off nozzle and the take-up roller.
Spinning stability in rotor spinning is largely influenced by the following four factors.
One of those factors is Σ the numbers of fibres in the yarn cross-section.
Fig.2 Yarn tension on rotor schema Observation: Assuming that there is rotation of Oxyz framework (rotor) which is affect yarn at ϕ', while x-axis is along with yarn movement, and it has rotation on y-axis.
,Wrapper Fibres in Open-End Rotor-Spun Yarns: Yarn Properties and Wrapper Fibres,FIBRES & TEXTILES in Eastern Europa,2005.

Mechanical properties.
Fig. 2 Tensile properties of annealed Al-Mg-Cu Fig. 3 Effect of Cu content on the n̄, r̄ and alloys with different Cu content Δr values of Al-Mg-Cu alloys On the other hand, the mechanical properties are comparable along different directions for the same alloy.
Conclusion In this work, the mechanical properties, formability and serrated yielding behaviors of Al-Mg-Cu alloys have been investigated, in connection with different Cu contents.
Morris, The effect of Mg precipitation on the mechanical properties of 5xxx aluminum alloys.
Zhou, Mechanical properties and formability of an Mg-6%Li-1%Zn alloy thin sheet at elevated temperatures, Journal of Materials Processing Technology. 206 (2008) 419-424

The main research contents concrete working, mechanical properties and chloride ion permeability resistance at low water binder ratio and large amounts mineral admixture.
The system study on mineral admixtures influence on concrete properties has an important guiding for engineering construction.
The high amount mineral admixtures concrete work, mechanical properties and resistance to chloride ion permeability were systematic studied with water to binder ratio 0.4, relying on Qingdao Bay Bridge construction.
Mix design On the basis of cementitious material consumption 430kg/m3, water to binder ratio 0.4, series mix proportions with fly ash, slag powder were systematically studied for mineral admixtures on concrete workability, mechanical properties, and impermeability.
Prospect Mineral admixtures become indispensable in high performance concrete components preparation because of low carbon environmental protection, the price is relatively low and the concrete properties improvement.

Introduction Gear transmission is one of important mechanical transmissions.
Distribution of EHL Film Thickness and its Influence Factors Distribution of EHL film thickness.
The distributions of the EHL film thicknesses on meshing line The influence factors on gear lubrication and minimum film thickness.
The oil viscosity will then decrease and affects on the lubrication negatively.
Machine and Mechanical Design [M].

Cheng1 1College of Mechanical & Power Engineering, Harbin Univ. of Sci. and Tech, Harbin 150080, P.R.
Introduction In milling the adhering disrepair is an important factor that affects the normal running of the roboticized equipment.
The modal property directly affects dynamic performance of cutter, and the effective modal shape and natural frequency are sensitive to structure and local damage of cutter.
Tao, Chinese Journal of Mechanical Engineering 36, (2000) 10-15
Dou, Frontiers of Mechanical Engineering in China, 3 (2008) 2-5

Based on these results, the residual stress distribution on the affected machined layers can be controlled by optimizing the cutting sequence.
The chemical composition, mechanical properties and thermo-physical properties were presented in earlier investigations [4, 5].
As far as friction modelling is concerned, a simple model based on the constant shear hypothesis was implemented with the shear factor equal to 0.8.
Jawahir: International Journal of Mechanical Sciences Vol. 47 (2005), p. 1611-1628
Guo: International Journal of Mechanical Sciences Vol. 42 (2000), p. 10691086

Based on these analysis and summarization, make use of treated sludge, waste paper fibers and industrial waste wood chips as raw materials, adding other environmental protection additives to prepare a kind of biomass foaming material which has low quality, low density and good mechanical properties.
There are many differences between China and other countries in biodegradable packaging materials, others generally used waste agricultural products or food [4, 5], and studied the biodegradable properties, including whether have degradation, the degradation time and after degradation whether it is friendly to the environment [6, 7, 8].
While China preferred to choose straw or waste paper [12, 13], and studied the mechanical properties and influencing factors, For example Academy of experts in Jiangsu Agricultural Sciences [14] used waste agricultural straw successfully developed the environmental protection straw flowerpot, it is biodegradable and beneficial to the growth of plant.
The density changed because added wood chips increased the viscosity, affected the foaming effect.

Introduction Stress-induced crystallization is a key factor affecting the mechanical properties of rubber.
The self-reinforcement of rubber is due to crystallized ability which is corresponding to the excellent mechanical performances.
The stress-induced crystallization related to IR good mechanical properties, especially at large deformation of rubber materials.