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The amount of energy stored and released from the board is dependent on various factors, such as the height and movement of the landing acrobat, the mass and movement of the taking-off acrobat, and the mechanical properties of the board.
Unlike most sports, most manufacturers don’t measure or know the mechanical properties of circus equipment they build.
The teeterboard and the hockey stick share similar properties.
Table 1 Mechanical properties and dimensions of the teeterboards.
These findings offer further understanding on the mechanical factors that influence the performance of Korean teeterboard acrobats.

is wave number; is the density of the PZT actuator; is the mechanical impedance of the PZT actuator; is the mechanical impedance of the host structure; is the strain; is the stress; is the complex modulus of PZT at zero electric field, and is the mechanical loss factor of PZT; is the piezoelectric constant; is the electric displacement; is the complex dielectric constant at zero stress, and is the dielectric loss factor.
For a given PSC beam, the mechanical impedance of the PZT actuator is a constant and the mechanical impedance of the host beam is the only variable influencing the change of the coupled electric admittance.
In this study, this coupling property of the PZT is utilized for monitoring the change of prestress forces, which enables one to measure the impedance changes in prestress forces.
Table 1 Key properties for the PZT patch (P-51) Physical parameters Symbol Values Density 7450 kg/m3 Dielectric constant F/m Piezoelectric strain coefficient m/V Elastic modulus N/m2 Mechanical loss factor 0.001 Dielectric loss factor 0.012 a) PZT patch and anchor plate b) The PSC beam Fig. 3.
Further studies will be conducted to investigate and calibrate the effects of environmental factors induced uncertainties on the EMI spectra.

Trunk assembly is an important opening and closing part of the car body，its design must be considered rationality of the trunk’s rationality, convenience, comfort and other factors, so there are certain difficulties in the design.
c) Ensure the reliability and safety when locked and will not open automatically when driving ; d) The trunk should be switched on and off conviently; e) The trunk should have good sealing properties; f) The trunk should meet the requirements of horizon under the rear window; g)Trunk structure should have enough strength and stiffness which can ensure that suitcase is reliable; h) Good suitcase manufacturing, assembly process; i)The modeling should be consistent with the overlook of vehicles, including external surface shape, the license plate installation position, and the clearance between it and the parts at the side, and the position of the tail lights.
And it’s required that the distance between the operator and bumper is within 50mm~200mm. 3.1 Impact factors of trunk opening angle a).
Disadvantages: hinge occupied larger space when compared with four-link, affecting the storage space of the trunk.
Human Factors in Transport Research，1980，18：33-34

In order to discuss the mechanical behavior of the pavements in the opening process, the finite element model of the pavement system on the Haihe Bridge being built in Tianjin China was built, and the mechanical response in the opening process was calculated.
The bridge deck pavement is an important part of steel bridge deck system, its quality will affect driving safety, comfort, bridge durability and investment returns.
The mechanical analysis can reveal the stress-strain state of pavement layers and deformation characteristics, and consider a variety of structural and environmental factors on the impact of stress state of pavement.
No matter the force or the cross-sectional form of the girder structure, the mechanical property of pavement of bascule bridge is significantly different from the long-span suspension bridge and cable-stayed bridge.
The mechanical response of pavement with different pavement thickness of 30mm, 40mm, 50mm and 60mm is analyzed, as shown in Fig. 5.

The result indicated the tribological properties are poor if the graphitization of graphite is too high or low.
The method for preparation of graphite greatly influences the property of graphite bearings, thus physical properties, mechanical strength and tribological property of graphite must be considered while developing a water-lubricated bearing.
Under shock loading for nuclear primary pump or catastrophe, wear and friction would appear between the bearing and the rotor, which could increase bearing clearance and aggravate rotor vibration, thereby further affecting the stability and service life of bearing and of the whole system.
Temperature rise and wear volume, which are two of most important factors, were measured to evaluate the use performance of water-lubricated bearing under frequent start-stop situation.
The basic physical properties of three kinds of graphite specimens were tested

The production process highlighted them for their unique properties such as high ratio of strength to weight, excellent high temperature oxidation and creep properties [1-6].
A review of the recent research on ODS steels, show the two main significant properties: high temperature strength and excellent creep properties which could improve by optimizing manufacturing process [7-10].
Results and Discussion The mechanical properties of all three variants were investigated by performing tensile test using a thermomechanical simulator which could apply the heat treatment during loading.
Critical factors affecting the high-temperature corrosion performance of iron aluminides.
Sellars, Structure and properties of ordered intermetallics on the Fe-Al system, ISIJ Int. 31 (1991) 10, 1113–1126, doi:10.1016/0142-1123(92)90522-E [6] O.

The frangibility of a bullet is influenced by its bullet characteristic factors, target characteristics, and impact condition.
(1) Results and Discussion Physical Properties of Cu-Sn Composite Density is one of the requirement needed to support a good ballistic performance of a bullet.
Mechanical properties of Cu-Sn Composite Hardness and modulus elasticity are mechanical properties that must be studied in manufacturing frangible bullets, their to perform relevant with the performance of a bullet.
Higher modulus of elasticity can be stated that its compactibility (interface bond quality) is also higher [2].The increase strength of bond will affect on the performance of a frangible bullet, since frangibility will increase if strength and durability of material properties decrease according to Rydlo [6].
“Theoretical Criterion for Evaluation of the Frangibility Factor”.

Effect of Milling on Dielectric Properties of PZT Shyamanand Pandey1,a, Swarat Chaudhuri2,b, Rahul K.
The crystallite size plays a crucial role in affecting dielectric permittivity and polarization to a certain extent in such ceramics.
Herbert, Electroceramics: Materials, Properties, and Applications.
Study of electrical and dielectric properties of CaMn0.6 Fe0.4O2.8 perovskites.
Structure, dielectric and electrical properties of relaxor lead-free double perovskite: Nd2NiMnO6. 

The liquid spreading speed in the textile material would affect the comfort property.
Thus, the liquid spreading speed of the material would affect its comfort property.
The properties of foam are governed mainly by the selection of raw materials (e.g. composition and properties of the raw materials) as well as the manufacturing process(es) [12].
De Boos, Effects of structure and finishing on the mechanical and dimensional properties of wool fabrics, Textile Research Journal. 61 (1991) 247-252
Juciene, The influence of mechanical properties of sewing threads on seam pucker, International Journal of Clothing Science and Technology. 18(5) (2006) 335-345

In the loading process of heterogeneous rocks, crack initiates locally and the crack initiation will affect its neighbors, which leads to the propagation of cracks.
Spatial variation is also one of the most important factors that affect the failure modes of rock.
As shown in figure 6, before the peak region, the curves have the same slope factor.
A new meso-mechanical approach for modeling the rock fracturing process.
Research on influence of pre-existing crack geometrical and material properties on crack propagation in rocks.