ASSESSMENT OF THE OPERATING LIFETIME OF COPOLYMER LINERS USING A NOVEL FORMULA
DOI:
https://doi.org/10.53555/eijmhs.v1i1.6Keywords:
Prediction, lifetime, polypropylene liner, fatigue stress, blood centrifuge, Novel model systemAbstract
Preventive assessment of liners' lifetime is very important for the public health. Fatigue is the main reason of mechanical failure at least in 90 % of fractures during blood banks 'centrifuges operations. The aim of this study is to develop a formula to estimate lifetime of polymeric liners. The results from experimental and analytical study are pointed out in a diagram. Using our presented formula enables one to estimate approximately when a liner should be replaced before unwanted fracture might occur.
References
. Beckman Coulter, "Blood cell separation using commercial gradient reagents and centrifugation", Application Information Manual, 2002.
. Pall Corporation, Plasma Optimization Guide, Improving plasma yields from whole blood donations, USA, 2010.
. Vinecenso V., Francesco V., Rotors: Stress analysis and design, Springer, 2013.
. Parker, A. P., “Stress intensity factors, crack profiles and fatigue crack growth rates in residual stress fields, residual stress effects in fatigue”, ASTM STP 776, 1982.
. Nihat O., Margareta N., David G., Dawn Leger, Fundamental of bio Mechanics: equilibrium, motion, deformation, Springer, 2012.
. Kim, W.H, Laird, C, Crack nucleation and state I propagation in high strain fatigue- II mechanism. Acta Metallurgica. Volume 26, Issue 5, 777–787, 1978.
. Michael R. Mitchell, Ronald W. Landgraf, Advances in fatigue lifetime predictive techniques, second volume, Issue 1211, 1993.
. Richard G. Budynas, J. Keith Nisbett, “Shigley‟s mechanical engineering design”, Ninth Edition, McGraw Hill, initial tables, 266-345, and 2011.
. David G. Ullman, “The mechanical design process”, Second Edition, Appendix C, 2005.
. Gorge E. Dieter, “Mechanical Metallurgy”, Third edition, McGraw-Hill, 1986.
. A S Maxwell, W R Broughton, G Dean and G D Sims, Review of accelerated ageing methods and lifetime prediction techniques for polymeric materials, National Physical laboratory (NLP) report DEPC MPR 016, funded by DTI, 2005.
. William D. Callister, Jr. and David G. Rethwisch, Material science and engineering, An introduction 8th edition, Chap15: Characteristics Applications And Properties Of Polymers, 2015
. Clive Maier, Theresa Calafut, and Polypropylene: The definitive user's guide and data book, USA, 1998.
. Senol S., Pasa Y., "Effects of testing parameters on the mechanical properties of polypropylene random copolymer", Polymer Testing, 24; 613 – 619, 2005.
. P. K. Mallick, Yuanxin Zhou, “Yield and fatigue behavior of polypropylene and polyamide-6 nano-composites”, Journal of Materials Science, 3183 – 3190, 2003.
Downloads
Published
Issue
Section
License
Copyright (c) 2015 EPH - International Journal of Medical and Health Science (ISSN: 2456 - 6063)
![Creative Commons License](http://i.creativecommons.org/l/by-nc-nd/4.0/88x31.png)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.