Gradient Chain Structure Model for Characterizing Frequency Dependence of Viscoelastic Materials

2020 ◽  
Vol 146 (9) ◽  
pp. 04020094
Author(s):  
Panpan Gai ◽  
Zhao-Dong Xu ◽  
Yingqing Guo ◽  
Jun Dai
Keyword(s):  
Frequency Dependence ◽  
Chain Structure ◽  
Structure Model ◽  
Viscoelastic Materials

Frequency Dependence of Viscoelastic Materials for Small Joint Replacements

2007 ◽  
Author(s):  
Aziza Mahomed ◽  
David W. Hukins ◽  
Duncan E. T. Shepherd ◽  
Stephen N. Kukureka
Keyword(s):  
Frequency Dependence ◽  
Loading Frequency ◽  
Viscoelastic Materials ◽  
Frequency Dependent ◽  
Joint Replacements ◽  
Storage And Loss Moduli ◽  
Small Joint ◽  
Wrist Joints ◽  
Medical Grade

Elastomers, such as silicone, are currently used for many designs of artificial finger and wrist joints because they are inert, durable, flexible and allow the necessary range of movements [1–6]. The disadvantage of these silicone joints is that they fracture in vivo [3,5,7]. In addition, these elastomers are viscoelastic so that their properties may depend on loading frequency. It is then possible that the performance of the joints may be frequency dependent. As a first stage in investigating such effects, we have determined the storage and loss moduli of a medical grade silicone in compression.

Model Innovation of Exhibition Logistic Supply Chain

2013 ◽  
Vol 397-400 ◽  
pp. 2672-2676
Author(s):  
Xiao Ming Wang
Keyword(s):  
Supply Chain ◽  
Market Economy ◽  
Chain Structure ◽  
International Exhibition ◽  
Structure Model ◽  
Characteristic Analysis ◽  
The World ◽  
Supply Chain Structure ◽  
Exhibition Industry ◽  
World Exhibition

Exhibition has been widely recognized as a strong booster of market economy in the world. Exhibition logistics is the basic guarantee for the development of exhibition industry. In this study, some improvement and innovation ideas of Chinese traditional exhibition logistics were proposed through the characteristic analysis of international exhibition logistics. A new supply chain structure model of international exhibition logistics is needed to accelerate the specialization, speed, standardization and informatization of exhibition logistics.

Fast calibration of CBED patterns for quantitative analysis

1993 ◽  
Vol 51 ◽  
pp. 674-675
Author(s):  
M.A. Gribelyuk ◽  
M. Rühle
Keyword(s):  
Reciprocal Lattice ◽  
Accurate Determination ◽  
Incident Beam ◽  
Crystal Thickness ◽  
Structure Model ◽  
Beam Direction ◽  
Transmitted Beam ◽  
Reciprocal Vector ◽  
On Line

A new method is suggested for the accurate determination of the incident beam direction K, crystal thickness t and the coordinates of the basic reciprocal lattice vectors V1 and V2 (Fig. 1) of the ZOLZ plans in pixels of the digitized 2-D CBED pattern. For a given structure model and some estimated values Vest and Kest of some point O in the CBED pattern a set of line scans AkBk is chosen so that all the scans are located within CBED disks.The points on line scans AkBk are conjugate to those on A0B0 since they are shifted by the reciprocal vector gk with respect to each other. As many conjugate scans are considered as CBED disks fall into the energy filtered region of the experimental pattern. Electron intensities of the transmitted beam I0 and diffracted beams Igk for all points on conjugate scans are found as a function of crystal thickness t on the basis of the full dynamical calculation.

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