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So the theoretical model of water-jet guided laser machining cotains thermal physics, fluid dynamics, interaction of laser and water-jet to material, the varying thermo-physical and mechanical properties of material.
The convection heat transfer should affect the entire surface of model and the coefficient was calculated by hf =Nuλ/l, Nu was obtained from a review article [5].
(3) To exert machanical effects on the workpiece with different mechanical properties result from the influence of temperature gradient.
In order to more clearly reflect the process of cooling, several points from high temperature to low temperature along the arrow direction shown in the Fig.6-a) were selected to draw a set of time-temperature curves just as illustrated as Fig.7, it can be seen that the points temperature were declined only about 1ms, the rapid water jet cooling resulted in a quenching effect, which enhanced the mechanical properties in the processing area and also was able to be apply to adjust the pulse spacing more reasonable in accordance with the cooling time.
The rapid cooling of the water jet to high temperature hole wall after every laser pulse results in a quenching effect, which enhance the mechanical properties in the processing area and also can be apply to adjust the pulse spacing more reasonable in accordance with the cooling time.

Moreover it provides a significant design advantage due to the fact that it does not change the aerodynamic properties of the structure and the disturbances are eliminated [8, 9].
On line damage monitoring Although through the last years much attention has been given to the analysis of the mechanical behaviour (properties and durability) of scarf repairs little research has been focused on the sensing behaviour with the aim of developing a self-sensing repair system.
First of all the measurements accuracy might be affected by various factors such as sub-pixel optimization algorithm, subset shape function, sub-pixel intensity interpolation scheme, image noise and camera lens distortion.
All these properties are undesirable in SHM applications since they make the recorded data very difficult to analyse and interpret.
In addition there are several factors that can lead to lower strength such as the discontinuities introduced during the manufacturing process.

It could be known that of all reinforcements in bridge deck, only the lower transverse reinforcements in tension, the upper transverse reinforcements and all the longitudinal reinforcements were under compressive stress, these reinforcements under compressive stress could be neglected in mechanical properties checking, so it was enough to study of the transverse reinforcements of lower bridge deck only.
In analysis of the mechanical properties of bridge deck impacted by the diameter and spacing of reinforcements, the sub-model was adopted.
Fig.1 Sub-model of local bridge deck Fig.2 Reinforcements of sub-model In analysis of sub-model, the mechanical properties of reinforcements and the crack condition of concrete were studied by changing the diameter and spacing of transverse reinforcements.
Conclusion The diameter and spacing of transverse reinforcement in lower of bridge deck played important roles of the mechanical behavior of bridge deck and the concrete cracking conditions.
Transverse Cracking of Concrete Bridge Decks: Effects of Design Factors[J].

Further, Ergonomic factors have also been studied.
The aesthetic aspect has the same percentage as the roominess and mobility with 2.2% each.[3] These are required properties for analyzing seating comfortness [8] o Head rest mass, seat back mass and mass of seat cushion.
o Moments of inertia of seat cushion, head rest and seat back o Location of the centre of gravity of the head rest, seat cushion and seat Back o The lumped frame-foam-stiffness (loading and unloading) of the different parts in the seat back, seat cushion and head restraint o The damping properties of the lumped frame and foam o The joint properties (loading and unloading) Friction coefficient of the seat back and seat cushion SEATING DISCOMFORT Feelings of discomfort are mainly associated with pain, tiredness, numbness and soreness.
These feelings are considered to be imposed by physical constraints and mediated by physical factors like joint angles, tissue pressure and circulation blockage.
Conclusion An overall seat discomfort is influenced by both static and dynamic seat factors.

The development of a large variety of emerging advanced materials has brought forward newer challenges to the technologists for characterization of their mechanical properties specifically in small volumes.
It is demonstrated earlier [24] that improved combination of mechanical properties of dual phase steels can be achieved beyond VM>0.25 by suitable inter-critical quenching treatment (IQT).
The results thus infer that chevron notched rectangular bend bar specimens can be used to optimize mechanical properties of the rim of ICDP rolls.
The average tensile properties of the steels are: yield strength =422-442 MPa, tensile strength=551-584 MPa, and % elongation=21-25.
Rosenfeild, “Metallurgical factors affecting fracture toughness of aluminum alloys”, Metallurgical and Materials Transaction A, 6A(03), (1975), 653.

Results showed that, the strain-induced ferrite transformation of austenite and grain size were the decisive factors which control the strength and ductility, while the defects and internal stress etc. were the secondary factors.
Zhang, Microstructure and mechanical properties of high boron white cast iron with about 4wt% chromium, J.
Torres-Hernández, Mechanical properties of FeB and Fe2B layers estimated by Berkovich nanoindentation on tool borided steel, Surf.
Hu, Microstructure and Mechanical Properties of High Boron White Cast Iron, Mater.
Jin, Effect of intermediate temperature annealing on the stability of retained austenite and mechanical properties of medium Mn-TRIP steel, Mater.

The implant materials are chosen considering the properties required for the intended purpose.
The impact of processes, implant handling, sterilization type, and storage conditions, as well as any (chemical, electrochemical, thermal, mechanical, etc.) processing applied to the surface of the implant or its part to change its properties, are considered.
Choosing these materials is determined by the following factors: high-strength biocompatible metal alloys such as stainless steel and cobalt and chromium alloys are inert to living tissues.
The following mechanical properties of the VT1-0 bar material have been obtained: elasticity modulus (Young's modulus, E) – 103,170 MPa; tensile strength (sB) – 504-518 MPa; offset yield stress (s0.2) – 395-402 MPa; relative elongation (d) – 22-30 %; relative contraction (y) – 55-61 %; hardness – 50.5-51.5 HRA.
Batalov, Prospects of using titanium implants with predetermined osteogenic properties, Hir.

Residual stress is an important factor influenced the fatigue.
Introduction Residual stress is an important factor influenced the fatigue which attracted attention of many researchers.
The initial residual stress how it affects the gear contact fatigue strength which can be found though this process.
Analysis Material Property.
Table 1 Mechanical property of 12Cr2Ni4A heat treatment technology bσ (MPa) ( sσ MPa) δ(%) ψ(%) carburizing& quenching 1610 1120 3.0 30 No carburizing& quenching 1100 850 10 50 Contact stress.

The microstructure and mechanical properties of the composite were studied.
The domain switching plays an important role in improving the mechanical properties of ferroelectrics [1, 2].
Considering their special microstructure and properties, ferroelectric/piezoelectric ceramic particles have been added into structural ceramics to improve the mechanical properties of the matrix [5, 6].
Mechanical properties.
Therefore, domain structures are the main factors to affect the crack propagation behavior in LiTaO3 particles.

(Thermo Mechanical Control Processing) has been widely used to improve plastic formability in steel strips.
Drawability is one of steel strip properties which control press forming and affected by density of {111} preferred orientations.
Prediction of the antiridging properties required continuously analyzing the hot-rolling, hot-rolling and annealing, cold-rolling, and cold-rolling and annealing textures.
The initial Taylor factor of b.c.c. crystals is 2.75[29].
Needless to say, the Taylor factor is approximately inversed to the Schmid factor.