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The interface of bolted joint commonly focuses on the research of non-linear damping and stiffness, which affect structural response.
Energy balancing method is developed to identify the dry-friction parameter and viscous damping factor.
Ren et al. [1] developed a general purpose technique based on multi-harmonic balance (MHB) to identify the properties of non-linear joints from dynamic test data.
Experiments Identifying the system parameter of bolted joint with non-linear factors need to obtain some equivalent input-output values according to Eq. (6) or (7).
Lim: Identification of properties of nonlinear joints using dynamic test data, American Society of Mechanical Engineers.

During cure the main factor affecting composite quality is the external pressure applied to the laminate.
Research conducted by Liu et al. explored the effects of cure cycles on void content and mechanical properties of composite laminates.
DTA Technical Note - Factors affecting void content and compressive strength of carbon epoxy structures, Defence Technology Agency, New Zealand, 3/2009
"Effects of Cure Cycles on Void Content and Mechanical Properties on Composite Laminates."
"Effects of Cure Cycle Pressure and Voids on some Mechanical Properties of Carbon/epoxy Laminates."

The piezoelectric properties of the ceramics were investigated.
Piezoelectric properties measurement.
The electromechanical coupling factor (kp), mechanical quality factor (Qm) and dielectric temperature spectra were measured and calculated by the reasonance-antiresonance method using an Impedance Analyzer (Agilent E4980A, America).
The planar mode electromechanical coupling factor (kp) and mechanical quality factor (Qm) of the K0.5Na0.5Nb1-xTaxO3 ceramics were given in Fig.2(b).
The Ta5+ doping affects the piezoelectric properties of KNN ceramics to a certain degree due to the increase of the tetragonality of the lattice, and lead to the decrease in the TT-O and TC-T.

Using such porous silicon properties, ring-shaped nanostructured zones allowing the creation of low rigidity membranes combined with central seismic masses were realized and tested.
The mechanical quality factor (fig 4b) admits an optimal value for a value close of width (L=13mm).
Babrier, On mechanical properties of nanostructured meso-porous silicon, Appl.
Canham, Properties of Porous Silicon, INSPEC, IEE, London, UK, 1997, p. 12
[6] See for a complete revue “properties of porous Si”, edited by L.

A stochastic analysis of multi-scale problem in honeycomb microstructure was introduced in this paper to determine the variation of macroscopic homogenized properties considering uncertainty of micro-property.
The numerical results showed that even with minor geometrical defect could affect the macroscopic properties.
The macroscopic homogenized properties of porous materials are supposed to be influenced by the variation of geometrical information X and microscopic mechanical properties D, as written in eq. (1).
It is because many uncertainty factors may arise at microscale could influence the dispersion of macroscopic property.
S., Takano, N., Akiyama, H., and Nakano, T., Uncertainty modeling in the prediction of effective mechanical properties using stochastic homogenization method with application to porous trabecular bone, Mater.

Factors such as elastic modulus and thickness of NCD film and elastic modulus of interlayer which affect the shear stress distribution of NCD film on cemented carbide substrate were investigated.
However, the variation of contact stress distribution usually accompanies the protection of NCD coating due to the difference in mechanical properties between the coating and the substrate [4].
Factors such as elastic modulus and thickness of NCD film and elastic modulus of interlayer which affect the distribution of the shear stress were investigated.
The mechanical properties of the models were presented in Table 1.
The interlayer is a thin layer formed in the initial period of CVD process which contained WC, graphite and diamond, of which the mechanical properties can be various.

Meanwhile the key factors affecting the dynamical characteristics of the system were discussed in detail.
The anti-shearing stiffness, anti-bending stiffness and tensile stiffness of bogie were key factors of affecting the security, smoothness and stability of railway vehicle[2].
Mechanical system was the frame of the bogie test-bench, which was consisted of gantry, cross slide-bed, the agency of fixing wheel and guiding rail.
Each affects differently the time from vibration to steadiness of the system.
Through objectively and comprehensively analyzing factors which affect the system stability and efficiency, we simulate the mathematical model in Matlab7.0.

The reduction of the run-in period affects the wear during the motor life time.
Introduction The approach to reduce environmental key factors such as CO2-emission or fuel consumption forces automotive suppliers, such as the Robert Bosch GmbH, to continuously improve their products towards efficiency [1].
According to Möckel et al. the factors mechanical wear and electromechanical wear have an optimum, depending on the contact pressure between brush and commutator [3].
Though the material properties, the load spectrum, temperature as well as the contact pressure affect the steady state roughness.
The other factors current and voltage flow, the revolutions per minute of the armature and the run time to standstill change significantly at that stage.

Refining the microstructure of steel improves its mechanical properties (e.g. toughness).
In this work SAE 52100 specimens were exposed to repeated induction heating process and rotation bending tests were performed using single- and repeatedly heat-treated material in order to investigate the influence of this cyclic heat treatment on the mechanical properties of SAE 52100.
It is therefore of crucial importance to improve the mechanical properties of the material in order to reduce crack initiation and propagation.
The stress intensity factor K1max was calculated by equation shown in Eq. 1.
,UENO.M.: Fine Structures and Mechanical Properties of Thermally Cycled SUJ 2 Steel, ISIJ 75 657-664(1989) [7] KAWASAKI.K.: Micro-structure and Mechanical Properties of Induction Heating Quenched and Tempered Spring Steel,ISIJ73,vol.16,136-143(1987) [8] OCHI.T.: Metallurgy in Microstructure-refining of Steels by Induction Heat treating, ISIJ Ferrum vol12No12 38-42(2007) [9] SANTOS.E.C.

Furthermore, Heat Affected Zone (HAZ) tests are being introduced.
The complex correlations between the factors do not allow defining other properties (e. g. mechanical properties) through characteristics.
This chapter aims to present the properties of HAZ of (Q+T) high strength steel joints by the use of physical simulation, while the effect of welding parameters (t8.5/5 cooling times) on the different HAZ zones is also investigated.
Approaching to the lower limit, the risk of cold cracking increases, in case of long cooling times the reduction of toughness and strength properties can be expected.
- Using the Gleeble 3500 thermo-mechanical physical simulator the critical zones of S960QL HAZ can be reproduced.