Search results

The addition of 30% or more of starch reduced the mechanical resistance of samples which limited their use.
The obtaining of porous materials through starch consolidation is a directly consolidated technique based on the properties of gel formation of the starch in the presence of water, making possible its use as a conforming and main element to make pores [5].
In addition, the specimens showed low resistance, which could adversely affect the processes of bone integration in implants.
The ceramic pieces of β-TCP in the concentration of 30 and 40% of potato starch (Fig. 3 (c) and (d)) showed large amount of distributed pores with small diameter and low mechanical strength, both poor factors in the case of bone integration process for bone implants.
The parts containing 30 and 40% of corn and potato starches exhibited low resistance to handling due to the high porosity, besides small pores (about 10μm and 60μm), which could adversely affect bone formation.

Based on mechanical properties of railway extradosed cable-stayed bridge with the rigid continuous beam system in the high-intensity earthquake zone, three kinds of scheme on seismic response reduction including viscous dampers, lock-up device and friction sliding bearings is presented in the text and effectiveness of seismic response reduction is analyzed by using non-linear time history response analysis .
Literatures (Zhang,2009) studied the isolation properties of viscous dampers on the continuous beam bridge and cable-stayed bridge; Literatures (Wang,2006) studied the isolation effect of Lock-up device on the of Continuous beam bridges; Literature (Fang,2003) studied the isolation properties of friction sliding bearings on the continuous beam bridge.
Mechanical model of Seismic Isolation Devices Mechanical model of viscous liquid damper The composition of nonlinear viscous dampers consists of piston, fuel tank and orifice.
Mechanical model o f Friction Sliding Bearings The mechanical model of friction sliding bearings can be simulate by using friction elements.
In order to avoid the damage of dampers prior to damage of structure, after a comprehensive consideration of the structural damping effect and the facilitated local connection design, its reasonable mechanical parameters should be: damping coefficient C=20,000, speed index factor = 0.3.

Taking into account the CFB steels, until now the research on these steels has been focused on the correlation between process parameters, bainite microstructure and some given mechanical properties.
Quidort, Y.J.M Brechet, A model of isothermal and non-isothermal transformation kinetics of bainite in 0.5%C steels, ISIJ Int. 42(2002) 1010-1017. ] as well as information regarding microstructure nature, morphology and mechanical properties [[] F.
The undertaken approach tries to optimize the mechanical properties by controlling the amount of martensite for enhanced strength and of retained austenite for enhanced formability.
Hence, the bainitic structure will be provided with both martensite and austenite for optimum properties.
In general, the main controlling factors are TB and tB under the current experimental conditions.

Petrov1, a and Vladimir Bratov1,b 1Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences (IPME RAS), Bolshoj pr.
These processes can progress independently or affect each other.
These processes can progress independently or affect each other.
At the same time in some cases one can try to predict behavior of material on a bigger size level using strength properties evaluated on a smaller scale level.
The abovementioned approach based on the criterion introduced above was applied in order to modify material properties.

Mechanical Properties Microhardness.
Tensile Properties.
Yet, repair welding can lead to changes in mechanical properties of welded structure.
Contreras, Effect of multiple repairs in girth welds of pipelines on the mechanical properties.
Chennaiah, Effect of Heat Input on the Mechanical Properties od GMAW Welded Dissimilar Joints.

Key factors affecting dielectric properties of CaTiO3 include doping, chemical compositions, grain sizes and density.
Hamaji, Grain size effects on dielectric properties and Crystal structure of fine-grained BaTiO3 ceramics.
Auh, Effect of grain size and mechanical processing on the dielectric properties of BaTiO3.
Han., Effects of MgO coating on microstructure and dielectric properties of BaTiO3.
Schrapel, Effect of porosity and grain size on the microwave dielectric properties of sintered alumina.

The paper describes an analysis of suitability of a tire model and its model properties with respect to values of the car body acceleration, or running stability of the vehicle.
The paper will describe evaluation of suitability of a tire model and its model properties with respect to values of acceleration, resp. running stability of the vehicle [4, 5, 6].
It is impossible to start production without proper experiments and tests on a real product, buton the other hand it is not possible to monitor all properties by an expensive testing.
Goal of this maneuver is to evaluate capability of sustaining direction and directional properties of a vehicle that moves just by its own inertia.
[3] J.Svendenius, Examples of scale factors for a semi empirical tire model.

The tests for determining the shear strength are performed in Brazil in accordance with standard [3], according to the procedures provided in Annex B" Determination of the wood properties for design of structures " and, so far, does not require rigorous presentation of the test results taking into consideration the calculation of the uncertainty of measurement, as can be seen in [4].
The references [7, 8] emphasize that several studies are performed in the specific area of the timber in order to identify the factors that affect the physical and mechanical properties of this organic material, either inherent in the wood and also the environmental factors in which it develops.
These variations often occur due to age, anatomic element position analyzed in the tree, genetic and environmental factors, etc.
In the analysis of the factors affecting the measurement of a material must be considered that the behavior of biological organisms (such as plant species) is highly dependent on the environmental conditions of the laboratory [5, 7, 8], that is, the magnitude of the influence that, according to [9] are not measured, however, affect the outcome of this measurement.
So the comprehensiveness factor, k95% is determined by Eq. 12, from the students distribution with degrees of freedom effective (veff) which is determined by the formula of Welch-Satterhwaite, Eq. 13.

It can produce the high strength, good performance of complex precision mechanical parts.
Many factors have Influenced the stability of spinning process, Such as spinning wheel parameters , feed-rate techniques and so on[2], but from the experiment that spinning stability for extra large diameter-thick ratio thin-walled cylindrical parts between mandrel and workpiece is very sensitive.
Mechanical properties are listed in table 1.
Table 1 Mechanical properties Elastic modulus E/[Mpa] Poisson's ratio μ Density ρ/[kg.m-3] Initial yield limit σ/[Mpa] Tangential modulus G/[Mpa] 205000 0.307 8890 343.5 79000 Equipments: SY-4 Powerful spinning machine, Mandrel diameter 557mm, Spinning wheel diameter 260mm.
The Mechanical Design and Research,2007,23(4):65-68

Currently, the studies of CPUS mainly focus on the influences of piezoelectric element on the properties of the sensor, rare study concerning the influencing factors that affect the performance of CPUS has been conducted.
The properties of the piezoelectric composite are shown in Table 1.
It can be seen that the 1-3 cement-based piezoelectric composite has good piezoelectric properties: a high electromechanical coupling factor Kt and a small mechanical quality factor Qm, and thus it is an ideal alternative for producing broadband ultrasonic sensor [10, 11].
Table 1 Properties of the 1-3 cement based piezoelectric composite Piezoelectric strain factor d33/[ pC·N-1] Piezoelectric voltage factor g33/[mVm·N-1] Dielectric constant εr Thickness electromechanical coupling coefficient Kt/% Mechanical quality factor Qm Dielectric loss tanδ 398 71.2 631 63 12.60 0.0315 The CPUS was made by using the 1-3 cement-based piezoelectric composites as a sensing element, metal powder/epoxy resin composite material as the backing material and cement/epoxy resin composite material as matching layer.
Effect of forming pressures on electric properties of piezoelectric ceramic/sulphoaluminate cement composites [J].