Pinball spring model

2021 ◽  
Vol 104 (10) ◽  
Author(s):  
Vítek Veselý ◽  
Martin Žofka
Keyword(s):  
2012 ◽  
Vol E95.B (5) ◽  
pp. 1860-1863
Author(s):  
Wei KE ◽  
Lenan WU ◽  
Chenhao QI

2021 ◽  
Vol 16 ◽  
pp. 155892502110125
Author(s):  
Sha Sha ◽  
Anqi Geng ◽  
Yuqin Gao ◽  
Bin Li ◽  
Xuewei Jiang ◽  
...  

There are different kinds of geometrical models and physical models used to simulate weft knitted fabrics nowadays, such as loop models based on Pierce, piecewise function, spline curve, mass-spring model, and finite element analyses (FEA). Weft knitting simulation technology, including modeling and yarn reality, has been widely adopted in fabric structure designing for the manufacturer. The technology has great potentials in both industries and dynamic virtual display. The present article is aimed to review the current development of 3-D simulation technique for weft knitted fabrics.


2007 ◽  
Vol 347 ◽  
pp. 193-198 ◽  
Author(s):  
Simon P. Shone ◽  
Brian R. Mace ◽  
Tim P. Waters

The wave reflection coefficients of damage such as cracks, notches and slots in otherwise uniform beams depend on frequency and on the size of the damage. Experimental results are presented for the wave power reflection coefficients of transverse slots of various depths sawn into a number of beam specimens. These results are compared with a conventional spring model to estimate the depth of the slot. The method appears to work well for larger slot depths (greater than about 30% of the thickness of the beam) and at higher frequencies, allowing their existence to be inferred and their size to be estimated. This is due to the fact that the reflection coefficients are larger in these regimes. For smaller slots or at low frequencies, noise and experimental errors, such as miscalibration errors and ill-conditioning, become more significant.


Polymers ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 658 ◽  
Author(s):  
Byungwoo Moon ◽  
Jongmin Lee ◽  
Soo Park ◽  
Chang-Sung Seok

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