Search results

Generally, mechanical properties of altered rock determine the stability and security of underground engineering.
As the tunnel passed through water-rich altered rock, the stability of excavation surface can be affected by the change in stress state caused by the changes in physical and mechanical properties of altered rocks coupled with water softening effect, hydrodynamic and hydrostatic pressure.
Supporting structure was chosen according to the equivalent bending stiffness factor EI.
Altered rock has several special properties such as brittle, large gap, alternate hardness, argillation and water swelling.

The rate of deformation is a function of the time, the temperature, the applied load and the material properties.
Stress increases during deformation as τ = τ0 ехр(а/ks) under tensile loading with the change of the cross-section of the sample and stress decreases as τ = τ0 ехр(–а/ks) in under compression loading, here ks»2 is Sachs factor.
The initial temperature and density of dislocations affects the creep processes.
Ji, Heat Treatments Effect on the Mechanical Properties of Industrial Drawn Copper Wires, Advanced Materials Research, 811 (2013) 9-13
Zolotorevskii, Mechanical Properties of Metals.

It has been established that PEO-layers on titanium affect the functional state of cellular processes accompanying bone mineralization.
Titanium alloys are widely used as dental implant materials due to their affinity to epithelial and connective tissue and high chemical, biological, and mechanical properties as well as processability [1, 2].
The implant surface properties, such as biocompatibility, wettability and adhesive signal of an inorganic implant, determine the type of cellular response.
Thus, antigen-presenting dendritic cells (DCs) are influenced by proinflammatory cytokines such as interleukin (IL)-1β, IL-6, IL-17, tumor necrosis factor-α (TNF-α) and RANKL which could provide a supportive environment for the transdifferentiation of DCs toward osteoclasts (OCs) which are able to dissolve bone matrix. [12].
PEO-layers on titanium affect the functional state of cellular processes accompanying bone mineralization, especially in contact with coating formed by PEO.

It can be plotted depending on both elastic plastic material properties and a crack length.
Relations (8) describe rearrangement of diagrams of quasi-brittle fracture for a composite structure with variable properties under cyclic loading.
(12) Here are Coffin’s constants numerical values of which depend on material properties [21, p. 76-77].
Savruk, Stress Intensity Factors in Cracked Bodies, vol. 2.
Murakami (ed.), Stress Intensity Factors Handbook, in 2 vol., Pergamon Press, Oxford, 1986

In view of the above factors, decide on the rearview mirror of non-contact data acquisition by using hand-held laser scanner.
Beijing: Mechanical Industry Press, 2012 [2] Jingmin Sun.
Mechanical optimization design [M].
Beijing: Mechanical Industry Press, 2011 [3] Jiuxin Ye.
Beijing: Mechanical Industry Press, 2007

Water-soil interaction Reservoir water, laterite and reinforcement materials are three major elements which influence the dam evolution [2], where the physical effect induced by chemical interactions of two former is one of main factors that determine the service life of dam.
To discover the deterioration mechanism of laterite dam induced by chloride ions in acidic water, it is necessary to discuss their properties and reaction products’ chemical and physical properties, because the properties are important factors for microstructure and engineering indices of laterite.
From the physical effect of the products, generating of CO2 gas in the double decomposition reactions that carbonates participate in is also an important factor for the deconstruction of laterite aggregates and the formation of capillary leakage channels.
The results confirm that the microstructure changes of laterite can result in the deterioration of macro physical and mechanical properties of laterite.
Research on the Affects of soil physical properties induced by the interaction between Fe/Al oxides and clay minerals[J].

Introduction Rock mass is a discontinuous geologic body, which is cut by the structural planes of different mechanical properties and space conditions.
And he studied the rock mass deformation, destruction and the basic rules of mechanical property guided by the rock mass structure control theory comprehensively and systematically.
Rock mechanical properties not only depend on the mechanical properties of rock material, and are controlled by the effect of structural mechanics and environmental factors [3,4].
Because rock mass structure is different, so rock mass physical, mechanical properties and the way of engineering rock mass deformation and destruction are also different.
It can be known from Table 1 that the dip angles of AD05-g5, AD13-g5 and AD25-g7 changed little, but trend angles changed 20°and 35 °respectively, which may be affected by the surrounding faults.

The parameters of muscular-skeletal structure represent the key points in the gait or stability analysis process, allowing the development of some studies by means of which the properties of muscles and tendons combine in order to produce the gait or stability process with efficient energy consumption and to assure the muscles’ protection against an excessive extension.
Factors influencing plantar pressure Plantar pressure is influenced by some factors or functional parameters of the locomotion system such as: structural factors, operational factors, methodology factors, factors related to measuring methods and respectively all the factors connected to the shoes’ type. [4] Of all the factors influencing plantar pressure, there still is a common characteristic represented by its general distribution upon the plantar surface, as it is presented in fig.3; position deviations and values are the ones making the difference from one subject to another, from the normal shape to the pathologic one.
Fig.3 General distribution of pressure peaks on the foot sole during gait [2] The displacement velocity and respectively its control are other factors as important as the operational or structural ones.
The lower leg muscles, forming the three compartments: anterior, posterior and external, are usually affected but in this case only the ones from the anterior and external compartments.
Within the medical actions, after the mechanical and chemical cleansing of the wound was performed, the specialist doctor decided a surgery to reduce the tibia fracture and then apply the ostheosynthesis procedure using a rod.

Extension of the segment is mainly affected by the interaction of seam and charge welding phenomena and, nowadays, its prediction is still a tricky task involving rough empirical relations or labour intensive analyses.
The seam weld usually is characterized by high mechanical proprieties because it is a solid state junction generated at high hydrostatic pressure under oxide-free conditions, even if of lower properties respect to the base material.
The properties used for the AA6060 alloy are reported in Tab. 4.
Physic, thermal and mechanical properties of the AA6060 used in the present study.
As previously stated, Altair HyperXrude® uses an Arbitrary Lagrange-Eulerian (ALE) description of motion in problems with moving boundaries since it coalesces a good numerical stability and convergence properties with a robust mesh moving technique.

The current limiting factor of this SHM strategy is the difficulty in differentiating changes between minor differences caused by small temperature changes and structural damage, and, compensation for environmental temperature variation is crucial [1].
Influence of temperature on GW propagation and compensation methods Elevated temperature can affect the transducers and their bonding, but this effect can be minimized via the choice of transducer types, materials and manufacturer[3].
Temperature change lead to changes in the geometrical and physical properties of the structure causing significant changes in the measured wave signals.
This time delay is proportional to the propagation distance, meaning that later parts of the signal will be more affected than earlier parts; this leads to an effect similar to a stretch of the signals in time.
Several related methods for correcting this time delay have been presented in the literature[1-6] based on time domain stretching of either the baseline signal or the current signal, estimation of delay as a function of time through local coherence and use of these values as factors for subsequent time-domain stretch, or simple frequency domain stretch.