Acute Clip Compression Model of SCI

2016 ◽  
pp. 111-117
Author(s):  
Jared T. Wilcox ◽  
Michael G. Fehlings
Keyword(s):  
Compression Model

Influence of strain rate, temperature and fatigue on the radial compression behaviour of Norway spruce

Holzforschung ◽  
2017 ◽  
Vol 71 (6) ◽  
pp. 505-514 ◽  
Author(s):  
Carolina Moilanen ◽  
Tomas Björkqvist ◽  
Markus Ovaska ◽  
Juha Koivisto ◽  
Amandine Miksic ◽  
...  
Keyword(s):  
Strain Rate ◽  
Linear Model ◽  
Norway Spruce ◽  
Material Model ◽  
Radial Compression ◽  
Compression Tests ◽  
Static Compression ◽  
Rate Dependent ◽  
Compression Model ◽  
Wood Compression

Abstract A dynamic elastoplastic compression model of Norway spruce for virtual computer optimization of mechanical pulping processes was developed. The empirical wood behaviour was fitted to a Voigt-Kelvin material model, which is based on quasi static compression and high strain rate compression tests (QSCT and HSRT, respectively) of wood at room temperature and at high temperature (80–100°C). The effect of wood fatigue was also included in the model. Wood compression stress-strain curves have an initial linear elastic region, a plateau region and a densification region. The latter was not reached in the HSRT. Earlywood (EW) and latewood (LW) contributions were considered separately. In the radial direction, the wood structure is layered and can well be modelled by serially loaded layers. The EW model was a two part linear model and the LW was modelled by a linear model, both with a strain rate dependent term. The model corresponds well to the measured values and this is the first compression model for EW and LW that is based on experiments under conditions close to those used in mechanical pulping.

Analytical isentropic compression model and its application in a laser-direct-driven ramp compression experiment

2017 ◽  
Author(s):  
Quanxi Xue ◽  
Shaoen Jiang ◽  
Zhebin Wang ◽  
Feng Wang ◽  
Huan Zhang
Keyword(s):  
Isentropic Compression ◽  
Compression Model

Methodological analysis of an experimental spinal cord compression model in the rat

1988 ◽  
Vol 78 (6) ◽  
pp. 460-466 ◽  
Author(s):  
B. Nyström ◽  
J.-E. Berglund ◽  
E. Bergquist
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Compression ◽  
Cord Compression ◽  
Compression Model

scholarly journals Creep consolidation in land subsidence modelling; integrating geotechnical and hydrological approaches in a new MODFLOW package (SUB-CR)

2020 ◽  
Vol 382 ◽  
pp. 499-503
Author(s):  
Henk Kooi ◽  
Gilles Erkens
Keyword(s):  
Land Subsidence ◽  
Groundwater Extraction ◽  
Compression Model ◽  
A Site ◽  
Limiting Case ◽  
Surface Loads

Abstract. Creep and secondary consolidation are important phenomena in settlement caused by surface loads, but not commonly considered in land subsidence driven by groundwater extraction. To explore the role of creep in such settings, a new MODFLOW-2005 land subsidence package was developed that incorporates a creep formulation gleaned from geotechnical software. This formulation, which is based on the isotache concept, is an extension of, and incorporates the classical elastoplastic compression model of Terzaghi as a limiting case. The package is introduced, and results are presented of an application to a site in northern Jakarta. It is shown that the isotache model requires considerably higher overconsolidation levels of clays than the Terzaghi model, and that creep contributes to subsidence long after drawdown in pumped aquifers has stabilized, a phenomenon that is traditionally attributed to “hydrodynamic lag”.

scholarly journals Energy efficient enhanced tree structured compression model (ET-CM) for data aggregation in wireless sensor networks

2018 ◽  
Vol 7 (2.17) ◽  
pp. 1
Author(s):  
Nandoori Srikanth ◽  
M Siva ganga prasad
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Data Aggregation ◽  
Energy Efficient ◽  
Information Measure ◽  
Transmission Time ◽  
Wireless Sensor ◽  
Sensor Systems ◽  
Compression Model ◽  
Remote Sensor

Compression, is a typical strategy to decrease information measure by taking care of information excess, can be utilized as a part of postpone delicate remote sensor systems (WSNs) to diminish end-to-end bundle delay as it can lessen parcel transmission time and conflict on the remote channel. All together for remote sensor systems to misuse flag, flag information must be gathered at a large number of sensors and must be shared among the sensors. Huge sharing of information among the sensors repudiates the prerequisites (vitality effectiveness, low inactivity and high exactness) of remote organized sensor. This paper manages the investigation of compressive proportion and vitality utilization in the system by contrasting and the current compressive strategies.  

scholarly journals Cellular Neuroinflammation in a Lateral Forceps Compression Model of Spinal Cord Injury

2013 ◽  
Vol 296 (8) ◽  
pp. 1229-1246 ◽  
Author(s):  
Chloe N. Vaughn ◽  
Julia L. Iafrate ◽  
Jessica B. Henley ◽  
Edward K. Stevenson ◽  
Igor G. Shlifer ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Compression Model ◽  
Cord Injury

Modelling Tow Compression in Textile Preforms During Composites Processing

Aerospace ◽  
2004 ◽  
Author(s):  
P. Potluri ◽  
V. S. Thammandra ◽  
R. B. Ramgulam
Keyword(s):  
Deformation Behaviour ◽  
Compressive Loading ◽  
Final Part ◽  
Initial Part ◽  
Transverse Compression ◽  
Fiber Assembly ◽  
Compression Model ◽  
Out Of Plane ◽  
Composites Processing ◽  
Transfer Moulding

Fiber assemblies, in the form of woven, braided, nonwoven or knitted structures, are used as reinforcements in composites. These textile structures are subjected to in-plane membrane stresses such as tensile and shear, and out-of-plane stresses such as bending and transverse compression. Amongst various modes of deformation, transverse compaction behaviour is the least understood mode; however this mode is very important for composites processing using vacuum forming, resin transfer moulding, thermoforming and hot compaction methods. The present paper reports a computational approach to predicting the load-deformation behaviour of textile structures under compressive loading. During the compression of a random fiber assembly, fibers are subjected to kinematic displacements, bending and finally transverse compression of individual fibres. In the case of interlaced architectures, such as woven and braided structures, it is convenient to deal with deformations at meso-scale involving yarns or tows, and deal with inter-fiber friction and fibre compression at yarn/tow level. It can be seen from the load deformation graphs that the initial part is dominated by bending energy and the final part by compression energy. A combined yarn bending and compression model was in good agreement with the experimental curve during the entire load-deformation cycle. On the other hand, an elastica-based bending model predicts well during the initial part while tow compression model predicts well during the final part. Inter-fiber friction was initially ignored — this is being introduced in the refined model for both the dry and wet states.

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