Search results

Funazuka3 1 Graduate School of Science and Engineering for Research, University of Toyama, Japan, e-mail: takatsuji@eng.u-toyama.ac.jp 2 Department of Mechanical Engineering, Northwestern University, USA, e-mail: dohda.kuni@northwestern.edu 3 Graduate School of Science and Engineering for Education., University of Toyama, Japan, e-mail: m1371222@ems.u-toyama.ac.jp Keywords: micro-extrusion, tribology, die angle, lubricants Abstract.
Friction is one of the predominant factors exercising strong effects in micro-forming.
Crystal organization of materials, lubricants and die coatings are important factors that exert strong influences on material frictional behavior.
Fig.1 Micro-extrusion experimental setup Fig.2 Microstructures of the billets Condition (1) Condition (2) Extrusion temperature:723K Condition (3) Extrusion temperature:753K Fig.3 Hardness values of the billets at different conditions Table.1 Work-hardening and plastic coefficients Fig.4 Digital micrographs of the dies having different angles Table 2 Lubricants properties Lubricant types used in the micro-extrusion experiments are tabulated in Table.2.
As a result, the kinematic viscosity of lubricants affected the extrusion force.

There are various requirements that the modern dressings have to meet: maintain a moist environment around the wound; permit diffusion of gases; stimulate the growth factors; provide mechanical protection; prevent the wound desiccation; non-allergenic; minimise pain from the wound; remove excess exudate; control local temperature and pH; be comfortable and easy to remove; cost effective and aesthetically acceptable and biocompatible and elastic.
However, still traditional wound dressings do not have suitable properties for modern biomaterials and specific wound applications [10, 11].
Results and Discussions The dressing dimensional properties are given in Table 2.
It was found that hydrocolloid dressings had the slowest solution uptake properties.
Another important finding is that the hydroactive dressings had better conformability properties.

Variability range of Sm and Sa depends on many factors of random origin closely related to the mode of a machine operation.
Calculation of fatigue life is largely affected by the results of experimental tests in the field of cyclic properties description, according to the stress based approach [1, 2, 7, 10], strain based approach [8] or energy based approach [6].
The parameter of plastic strain energy DWpl is determined on the basis of an analysis of stress-strain loop from the period of life characterized by stability of cyclic properties.
Cyclic properties of C45 steel were determined for specimens with geometrical characteristics defined on the basis of PN-84/H-04334 norm.
Boronski, Strain analysis at notch root in laser welded samples using material properties of individual weld zones, International Journal of Fatigue 74 (2015), pp. 71-80

Limited energy in the binding force is going to be a major element that measures and constrains the properties of routing protocol. 1.
Thus, PathProfit and RelayProfit are going to affect the time of calculation compensation.
Analysis of Property To comprehensively evaluate above routing protocols, 50 sensor nodes are distributed averagely in a 100 meter*100 meters area to conduct random topology test.
Sensing distance of the node is r=20, τ=0.001s, N=2, and given transmission power is Pt, Receiving Power (4) Graph 2 d stands for the distance between receivers, and antenna gain Gt=Gr=1, antenna height Ht=Hr=1m, functional factor L=1, and path loss n=4.
And compensation factors are defined and simulation and comparison are conducted to prove the effectiveness of this protocol in saving energy.

Initially, under the assumption of initial isotropy and totally incompressible of the hydrogenated nitrile butadiene rubber, the deformable sealing properties are analyzed using Yeoh-Revised and Yeoh models.
Subsequently, the high pressure and high temperature test verifies that the material strength properties are the prerequisites to achieve a stable and reliable seal.
Additionally, external factors, such as large outside temperatures and internal Mises stresses, can accelerate the ageing process of CPRC, which may potentially result in structural damage [24, 25].
Sealing properties and structure optimization of packer rubber under high pressure and high temperature.
Analysis of failure factors and countermeasures of casing packer during completion testing.

The chemical and physical properties of cement are provided in Table 1.
Table 3 represents the chemical and physical properties of the superplasticizer.
Monteiro, Concrete microstructure properties and materials.
Pielert, Significance of Tests and Properties of Concrete and Concrete-Making Materials.
Kaplan, Flexural and Compressive Strength of Concrete as Affected by the Properties of Coarse Aggregate.

Shi Mechanical Engineering Department, Zhongyuan Institute of Technology, 450007, China Keywords: CBN grinding wheel, Spindle pivot, Emery wheel dressing Abstract.
The dust and the off-flavor produced by the resin corundum wheel during grinding affect the health of the operating-workers.
The grinding quality is affected by the property of the abrasive directly.
Considering such factors as the material of work piece, abrasive, particle size and grinding method synthetically, the 100% density is adopted, and the hardness of the wheel is between J and K (softness 3 to medium).
Fig.2 CBN grinding wheel Journal Title and Volume Number (to be inserted by the publisher) 309 The Dressing Method of the CBN Wheels During grinding of the CBN wheel, the abrasive particle in the working surface will gradually become blunt because of the influence factors, such as, the grinding force, the high temperature and the cementation in the grinding area, and at the same time, the original geometrical sizes of the wheel’s working surface may not be kept owing to the non-uniform wearing.

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.

Based on this, the mechanical model is established and the property of stress distribution of the coal floor is analyzed, which explains the impact of water inrush.
Analysis of mining stress on coal floor After coal mining, in-situ rock mass stress field round the stope is affected by mining.
According to the characteristics of abutment pressure, the calculation simplified mechanical model is established, as shown in Fig.1.
And the stress reaches to maximum at a distance of 10m in front of the face, where the stress concentration factor is 2.48 and coal floor is in a state of compression.
Conclusions (1) The mechanical model of the coal floor is established, and the analytical solution of distribution of floor stress is obtained.

It makes the energy consumption and affects the precision of product.
Lee et al. [3] used the upper bound method to establish an admissible velocity field to explore the flow stress and frictional factor in the ring and cylinder compression process.
The ring compression test can predict the flow stress and frictional factor.
The geometric profile of cylinder is conducted by 3D model, the elastic-plastic model is chosen and the material properties, such as Young’s modulus, Poisson’s ratio, density, were needed.
Chen, Master Thesis, “Stress Analysis of Non-uniform Cylindrical Compression Test,” Department of Mechanical Engineering at National Taiwan University, 1996