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These studies focused on improving the biocompatibility, biodegradability, hydrophilic and mechanical properties of PLLA.
Rheological properties of polymeric melts play an important role in processing operation of polymeric materials and determining mechanical properties of final products.
Therefore, it must be considered as one of the key factors when designing extrusion dies and controlling the quality of extrudate products.
The partial physical properties of the two PLLA resins are listed in Table 1.
Iwata, Uniaxial drawing and mechanical properties of poly [(R)-3- hydroxybutwrate]/poly (L-lactic acid) blends, Biomacromolecules 5 (2004) 1557-1566

Some other researchers attempt to figure out this problem from machining processing parameters optimization point of view [5], however the factors which affect residual stress are anfractuous, it is almost impossible to stably control residual stress distribution just only taking tool and machining parameters into account.
Material Properties.
The main mechanical properties of GCr15 steel are given in Table 2.
Table 1 Constants of the Johnson-Cook constitutive model A [Mpa] B [Mpa] n C m 1682 396 0.379 0.021 1.21 Table 2 Mechanical properties of the GCr15 steel Density [kg×m-3] Young modulus [Gpa] Conductivity [W×m-1×K-1] Specific Heat [J×kg-1×K-1] 7827 210 46.6 475 Chip Formation Method.
Obviously, the prestress affect the residual stress component σ11 significantly, however it shows an indistinctive effect on the other two residual stress components.

Material Properties Material properties data of L-1 re-examined for potential insight into material specification compared to material standard.
Material properties were examined into mechanical properties and material composition, as shown in Table 1.
Fig. 5 L-1 blade airfoil profile Material Properties Table 2 and Table 3 show mechanical properties and chemical composition of L-1 material compared to AISI 422 standard, respectively.
Experimental investigation into microstructure, metallurgy and mechanical properties of AISI 422 stainless steel weldments produced using fibre laser welding direct forming.
[25] Stress Intensity Factors of Cracks.

Shear and volume strains resulting from the austenite-martensite-transformation affect the development of residual stress during welding.
The conventional methods to introduce compressive residual stresses in the weld line are thermal and mechanical in situ and post weld treatments.
The composition and the mechanical properties for the stress relieved S690Q base metal is shown in Table1b.
Table 1: a) Test weld designation, chemical composition in wt-% and experimentally determined transformation temperatures of the LTT alloys. b) Chemical composition and selected mechanical properties of S690Q base metal.
The EDXRD data were fitted using a PVII function and the phase specific lattice parameter dhkl converted into the unit cell parameter ahkl, which were subsequently used to calculate a weighted average unit cell parameter a by using the multiplicity factor mhkl as weighting factor.

The effectiveness of externally bonded systems under harsh environments is also a key concern [17-22], in order to determine environmental conversion factors for design purposes.
A summary of fabric properties is reported in Table 1.
Properties of materials.
Properties of specimens
In addition, the retained tensile mechanical properties of the systems after the examination periods were the key factors to determine the influence of the long-term loading on the resistance of the IMC system.

.), and anti-sediment wear properties of dredging machine in dredging vessel has become an important research topic in dredging engineering[1].
The carbon is the main factor affecting the carbides quantity, under normal circumstances, and the higher the carbon content, the higher the number of carbides and wear resistance is increased.
Chromium is the main alloying elements in high chromium cast iron, and content of chromium is the main factors to decide carbide type.
In order to study the impact of different heat treatment parameters on the organization and properties of the wear inserts, alloy E (Shown in Table 1) is taken by heat treatment process experiments.
Influence of Annealing Process on Microstructure and Properties of High Chromium Cast Iron, J.

Fracture Toughness Calculation by Movable Cellular Automata Method Mikhail Pak a, Choon Yeol Leeb and Young Suck Chai c School of Mechanical Engineering, Yeungnam University, Gyongsan, 712-749, Korea a parkms@yandex.ru, bcylee@yu.ac.kr, cyschai@yu.ac.kr Keywords: Fracture Toughness; Stress Intensity Factor; Movable Cellular Automata Method; Edge-Cracked Specimen; CCT Specimen.
In case of the same material properties of i-th and j-th automata the ultimate strength sσ is used as a threshold value: Unlinked, when i s ijij K σσ ≥int
(5) In general case automata in i-j pair consists of different materials with different physicochemical properties.
In case of the same material properties, ij K =1.
Table 1 Mechanical properties of selected materials.

These conditions incorporate all basic information about the infinite sub-domain (material properties, internal sources etc.).
Thus, effective numerical modeling of mechanical processes in combined domains manifesting different mechanical and geometrical properties is a great challenge.
Moreover, the flux distribution is strongly affected by the interfaces between the walls and the internal substance.
On the other hand, the core almost does not affect the flux intensity factor.
Tab. 1: Value of the normalized intensity factor Λ .

It uses instantaneous properties of working fluid, viz., gasoline to calculate heat release rates, needed to quantify combustion development.
In this connection thermodynamic models of the real engine cycle have served as effective tools for the analysis of engine performance and also able to reveal the sensitivity to various operating factors [1-4].
Heat Release Rate Cylinder pressure built by combustion process, is affected by the gas flows, heat transfer, change in volume of combustion chamber and the chemical composition of the fuel.
If the Woschni model is used, hcu and hcb is set to values close to unity because they are treated as weighting factors for the model.
First thermodynamic properties of this mixture are determined.

Aftershocks and heavy rain conditions will induce secondary geological disasters, a direct threat to human life and property security and reconstruction results.
After this, the method of strength reduction is used to analyze slope safety factor in different rainfall conditions.
Introduction Slope landslide is because of all sorts of factors coupling deformation, was eventually some inducing factors stimulate happen instability, produce sliding a disaster geological phenomenon.
As the two major natural landslides induced factors: earthquake and rain, both the cause of the mechanism completely different.
Using strength reduction method analysis of the different rainfall conditions of slope safety factor change trend, with the increase of rainfall, the softening parameters, the slope safety factor of slope sliding, decreasing gradually.