Search results

Building the constitutive model considering particle breakage Soil is the mixture of rock broken of weathering and mineral grains, the stress-strain relationship is complex, and related to many factors.
Yao Yangping [19] established constitutive model of sand particle breakage based on the affect of granular material particle breakage on the material dilatancy characteristics.
All the parameters can be determined by test with clear physical meaning, and can describe the mechanical characteristics of sand particle breakage reasonably.
With the building of high-heavy earthwork construction such as high dam, the soil particle breakage phenomenon in the high stress brought about the mechanical properties of the soil can not be ignored, the constitutive model considering particle breakage become the focus of current research projects.
American Society of Mechanical Engineers [C]. (1953), p. 53 [16] Salim, Wadud，Indraratna, Buddhima.

In recent years, with the rapid development of seismic theory of underground subway structures and computing technology, the numerical simulation analysis can fully display the dynamic properties of underground stations, interval tunnels and other ground structures in the earthquake action, so it is widely used by scholars all over the world.
As for the ground structures, the earthquake acceleration is the main factor that affects the structural dynamic response
The dynamic response of the structures depends on the shape, size, quality, rigidity, and the physical properties of the foundation.
Besides, it cannot be restrained by any geometrical conditions and properties, but for a high accuracy in the partial space and time domain.
The ordinary shaking table test is in a fixed acceleration field, and there exist lots of factors that affect the test outcomes, which have a direct influence on the simulation effects.

Throat: The corrosion of the throat is a factor affecting the campaign life of the furnace.
Side walls can also be backed up by chromic oxide plates for maintenance.Care should be taken for thermal shock properties.
Silica has the advantages of high temperature resistance, high level of insulation possibilities, good mechanical load properties, corrosion resistance to SiO2 attack.
If the properties of raw materials used for glass are good and the expected campaign of the furnace can be met with some maintenance, magnesite is still a good and cost effective solution.
The lifetime of the furnace is significantly affected with the life of the throat and sidewall blocks corrosion.

In the solution of the inner wall of the stainless steel tube, the bacteria moving to the solid surface is controlled by three factors: electrostatic attraction, bacteria floating and Surface hydrophobic molecules.
The breeding of iron bacteria may change the biological properties of the water.
Study on the factors affecting biological fouling in cooling water system.
Effect of Solid Material Properties on Biofilm Formation.Fine Chemicals, Vol.19(2002),p.512-514.
Anti-adhesive properties of fish tropomyosins.

The beam properties are radius rb, bending stiffness EIb and density ρb, they are assumed to be constant across the entire beam length lb.
The model parameters describing the properties of the beam and the supports presented in Figures 1 and 3 are summarized in Table 1.
Now, the lateral dynamic behavior is validated and then updated by adjustments of the beam's elastic support properties.
An adjustment of the beam's elastic properties, mass and bending stiffness, has also been conducted but is not included in this paper.
However, it does not significantly affect the maximum bearable axial load for the active stabilization.

The interaction between zeolite crystals and substrates affects the properties of the obtained membranes.
By controlling the properties of the zeolite membranes with respect to the orientation and compactness of the crystals, high applicability in numerous fields is expected.
The initial composition, elaboration conditions and the properties of the ceramic supports used for the obtaining of the silicalite membranes are summarized in Table 1.
The initial composition, elaboration conditions and the properties of the ceramic supports used for the obtaining of the silicalite membranes.
The results of this study indicate the role of the crystal formation by controlling the conditions of the hydrothermal treatment and also that the structure of the zeolites is influenced by factors as structure of the support and reaction conditions.

The mechanical properties of thin walled structures can be further enhanced if they are made of composite materials due to their inherent high strength to weight and high fatigue resistance as compared to conventional materials (Aluminum, Steel and Titanium etc).
The laminate material properties i.e.
The material properties used for the analysis are given in Table 1.
Inertia and rigidity are the two main factors that affect the natural frequency of an object.
For two considered cases, as far as inertia is concerned all factors are constant except density.

In the vehicle running process, the load size and nature of its components bear was affected by many factors.
(2) In the running process, the interaction force between wheel and road surface changed constantly, these changes were related to road surface shape, size of roughness, the inertia and the elastic properties of vehicle parts.
According to the maximum dynamic load (5) where kd - dynamic load factor
(6) The safety factor n is (7) (5) Driving force analysis Starting from the analysis of electric vehicle force, which is the basis of analyzing performance of a vehicle.
Li: Mechanical Research & Application, (2012) No. 1, pp. 4-6

Stability hampers the TC properties of the nanofluids [6, 21].
For flat plate, the geometrical factors, then [41].
These results show that variation of filler addition affects the rate of precipitation as well as properties, which reach agreement well with the results in previous studies by Mehrali et al., (2014) [5].
Han, Nanofluids with enhanced thermal transport properties, 2008
Metselaar, Investigation of thermal conductivity and rheological properties of nanofluids containing graphene nanoplatelets, Nanoscale research letters, 9 (2014) 15

This property was observed for various metals and for grain size as large as 300 nm [1].
Stress relaxation experiments The stress relaxation consists in interrupting the sample loading during a mechanical test (in compression in the present study).
With γ& the plastic shear rate, τ the applied shear stress and M the combined modulus of the sample and the testing machine, the general equation for stress relaxation is: M τ γ & & −= (1) The activation volume is the first order parameter of the Taylor expansion of the activation energy, which in the expression of the shear rate gives, with * F∆ the activation energy, eτ the effective shear stress, k the Boltzmann constant and T the absolute temperature:       −∆ −= kT VF e * * 0 exp τ γγ && (2) Combining relation (1) and (2) one obtains for the relaxation process the shear stress variation 0τττ −=∆ , as a function of time (with 0τ the stress at the onset of the relaxation) following a logarithmic relation, with C a time factor: )1ln(* C t V kT + Ω =∆τ (3) * VΩ is the apparent activation volume, whereΩ is a the correction factor depending on an athermal strain hardening rate K function of the relaxation
conditions, an immobilization factor β related to the dislocation density and M : )1()1( β+×+=Ω M K (4) Fig. 1.
These results indicate first, that the metal properties are not strongly affected by the strain history.