Search results

One of the factors is high initial cost of OBM, especially when it comes to formulate drilling fluid based on synthetic or mineral oil [1].
Effects of Ligni n on Mud Rheology and Filtration Properties at Different Temperatures Table 3 shows the properties of lignin-mud at different temperatures.
The pH of lignin did not significantly affect the PV values of the mud since the PV values were about the same with commercial lignin properties.
Another mud properties that can be compared was HTHP filtrate volume.
S., American Society of Mechanical Engineers.

Immunoglobulin G (IgG) is one of the most important factors in diagnosing some diseases in clinic.
Light-addressable potentiometric sensor(LAPS) is a biochemical sensor system based on field-effect that integrates light, mechanical and electricity[4].
Simultaneously, the device which is caused by field-effect is sensitive on potential changes between the insulating layer and an electrolyte solution interface, and the photocurrent concerned with the analytes concentration is obtained by using the photovoltaic properties of semiconductors.
Reactive group(-NH2) were lead into the surface of silicon wafers prepared through chemical modification, and the goat anti-human IgG antibody was immobilized by covalent cross-linking in order to prepare the sensitive membrane having specific recognition property of human IgG.
The immune response between antibodies and antigens occurring on the LAPS chips surface is used to affect the LAPS sensor.

The transverse stresses σy, σz, τyz and other stresses away from the cutting plane will not affect the deformation on the boundary.
Two sets of tension-compression test data were recorded to examine the mechanical behaviour of the En8, one with the maximum loading strain of 0.026 and the other with the maximum strain approximate to 0.051.
Table 1 Measured Mechanical Properties of En8 (080M40) 0.2%Yield Stress (σ0) Elastic Modulus (E) Poisson's ratio (µ) Strain hardening exponent (n) Units MPa GPa Measured 450 195 0.295 6.5 The specimen containing the cold expanded hole was 100mm long, 40mm wide and 12mm thick, machined from a cold-drawn flat bar blank with cross section of 2" × 0.5" (49mm × 12.25mm).
However, efforts were made to minimize errors from each of these factors.
A multi-linear material model was used to represent the En8 mechanical behaviour in the FE analysis.

Actual mining process was studied through calculation with every step of 10m excavation, as open stope method was used for this mining, the support effect of artificial ore column was affected by designed strength construction process and other factors influences, roof-contacting was often not enough or pillar strength could not reach design requirements and resulted in movement and even collapse of goaf overlying rock stratum.
(b) AE distribution of overburden rock with mining 30m (a) Failure model of overburden rock (a) AE distribution of overburden rock with mining 20m (b) Schematic diagram of mechanical model Fig.1.
Failure and mechanical models diagram of overburden rock under mining layout Fig.2.
The microcracks of the gathered nucleation will greatly reduce the mechanical properties of rock material; with the increase of goaf and under the influences of tectonic stress, self-weight stress and external disturbances, macroscopic failure was produced in the so-called " tranquil period " of AE.

Even though SMA's have a lot of disadvantages, with the correct determination of properties a workable prototype should be able to be manufactured.
Aspects like electrical, thermal and mechanical behavior need to be designed simultaneously.
On the other side experimenting data can be invaluable due to the close relation with all the different factors.
Ashby, The selection of mechanical actuators based on performance indices.
Duerig, The Mechanical Aspects of Constrained Recovery, in Engineering aspects of Shape Memory Alloys, T.W.

EDM is best suited for machining high strength conductive materials since neither mechanical contact nor cutting is necessary [1].
When tools are miniaturized, the surface microstructure and material texture begin to affect the mechanical properties of the components; thus undesirably increasing the structural sensitivity.
Micro tools used for micro punching and micro cutting require sufficient mechanical strength to withstand the load during machining.
Yates algorithm for finding significant factors of the overcut of the produced holes Fig.4 Half normal probability plot for the overcut of the micro holes Regression analysis is also performed to find out the relationship between process variables and performance characteristics considered.

Dynamic Analysis and Structural Optimization for a Logging While Drilling Neutron Instrument Chao WEIa, Qiu-yue SUNb, Yuan-ying QIUc and Jun-jie YE* School of Electro-Mechanical Engineering, Xidian University, Xi’an 710071, China aweichao1927@163.com,bsunqiuyue900816@163.com, cyyqiu@mail.xidian.edu.cn, *ronkey6000@sina.com Keywords: Logging while drilling neutron instrument, Dynamic analysis, Topological form improvement, Structural parameter optimization Abstract.
The uniqueness of the function and structure form of the LWD neutron instrument studied in this paper leads to its particularity of the dynamic characteristics and influencing factors.
Due to structural complexity, the geometric model of the LWD neutron instrument is simplified as follows: deleting chamfering, holes and thread relief groove and simplifying the local components which compose of many small parts but have little influence on the mechanical properties of the whole model.
Therefore, it can be concluded that the modals of the x and y directions are easy to be inspired to cause the resonances and this will make the root-mean-square value of the acceleration response enlarge and then affect the precision of the instrument readings.
Li, Mechanical Vibration Theory, Zhejiang University, Hangzhou, 2005.

Important features which characterizes them are their amorphous structure and unique mechanical properties.
This effectively can be used for the evolution of preferred phases and thereby can be used to affect the properties of the alloy.
Thadhani, Mechanical properties of bulk metallic glasses.
Shiflet, Mechanical properties of iron-based bulk metallic glasses.
Vander Sande, The effects of devitrification on the mechanical properties of Cu46Zr54 metallic glass.

Cox2,m 1Department of Mechanical and Industrial Engineering, University of Brescia, V.
Ti-6Al-4V alloy, which is most used for the fabrication of orthopedic prostheses, is of particular interest for its mechanical properties [5,6].
Factors Levels Values Power 3 50 W 100 W 150 W Scan speed 3 750 mm/s 1125 mm/s 1500 mm/s For each of these nine combinations, three repetitions were performed: in total, therefore, 27 specimens were printed. 3.
Ceretti, “Mechanical characterization and properties of laser-based powder bed–fused lattice structures: a review,” Int.
Birbilis, “Understanding the effects of PBF process parameter interplay on Ti-6Al-4V surface properties,” PLoS One, vol. 14, no. 8, pp. 1–24, 2019, doi: 10.1371/journal.pone.0221198

Based on the literature, it is shown that the cooling medium used during the quenching process will have a significant effect on the cooling rate so that it will affect the resulting microstructure and mechanical properties [5].
Nanofluid stability is an important factor that must be considered because it can affect the thermal conductivity of nanofluids.
Eatemadi et.al., “Carbon nanotubes: properties, synthesis, purification, and medical applications,” Nanoscale Res.
Metselaar, “A review of nanofluid stability properties and characterization in stationary conditions,” Int.
Al Abas Siba, “EFFECT OF SURFACTANT ADDITION ON THE NANOFLUIDS PROPERTIES: A REVIEW,” Acta mech.