Search results

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.

The mechanical properties of adhesive materials change over time, especially when they are subjected to long-term loading regimes.
Ltd) Epoxy-based structural adhesives have emerged as a critical component for bonding pultruded rods and plates with other materials due to their excellent adhesion properties, high mechanical strength and good chemical properties.
The creep test specimens conformed to British Standard BS EN ISO 178 (Plastic- Determination of flexural properties) (2003).
Bending properties of epoxy-based adhesive.
Ashby: Material selection in mechanical design, Butterworth-Heinemann, 2nd Edn. (1999)

Measurement of the Internal Relative Humidity Distribution in Concrete Jikai Zhoua, Xudong Chenb, Jian Zhangc and Xiaowei Kand College of Civil and Transportation Engineering, Hohai University, Nanjing, Jiangsu, 210098, China azhoujikai@163.com, bchenxudong.1212@163.com, czuzu1104@qq.com, dkan1986@163.com Keywords: Concrete; Internal Relative Humidity; New Measurement System Abstract: The internal relative humidity (RH) and humidity gradients in concrete at early ages have a significant influence upon the properties of concrete, where exists a great discrepancy among the test results under different methods.
It has great significance for researching shrinkage characteristic of concrete at early ages and the free water effect on the dynamic mechanical properties of concrete.
Considering the above factors, the humidity sensors used in the new measure system are a capacitive type of humidity sensors made in Switzerland (SHT7X, 6mm×20mm).
The property of the new measurement system was analyzed, and the changing laws of the internal RH in concrete are studied in this part.
That is, the moisture distribution in concrete was affected by self-desiccation as well as moisture diffusion of concrete.

Surface roughness is also an important factor affecting mold service performances.
Table1 lists the most important properties of TiAlN coating.
If the PCR due to error (unknown and uncontrolled factors) is low, 15% or less, then it can be assumed that no important factors are omitted from the experiment.
This shows that some factors are omitted from the experiment.
Thus, this shows that influence of factors V and Rd on static δ is not significant, and influence of factor V is slight.

However there are several factors associated with faulty sensor readings which make sensor readings unreliable.
The application of the traditional approach to wireless sensor networks has many problems such as not considering network properties or communication overhead, and measurement errors of fault sensor readings does not considered.
The existing methods to deal with faulty sensor readings have several problems, which are as follows: (1) First, they didn’t consider network properties such as energy consumption and communication delay
The paper considers both sensor faults and measurement errors as faulty sensor readings, and we suggest a data value correction scheme which is based on network properties to the greatest possible extent.
An event cannot affect the value of a sensor fault.

The powderedegg white has a good rehydration properties, safer consumption and storage conditions than fresh product, keeping the high level of proteins and vitamins contained in the egg.
The drying process generating a porous and brittle product that is easily ground and turned into a powder with good rehydration properties [13].
According to Kadam and Balasubramanian [33], several factors may influence foam stability, such as: stirring time, type and the number of foaming agents.
Míková, Study of the factors affecting the foaming properties of egg white – a review., Czech J.
Peleg, Effect of two gums on the development, rhelogical properties and stability of egg albumen foams.