Abstract
Rotating parts of blood bank centrifuges are under heavy mechanical cyclic stresses due to their centrifugal loading conditions. Estimating the effective lifetime for these parts is very important for their application. Providing safety requirements for these components is mandatory in blood transfusion centers (BTC). Failure occurs in the engineering parts for both loading conditions of steady and cyclic. The fatigue phenomenon is the main reason for mechanical failures at least in 90 % of fractures during operation. In this paper, the effects of fatigue caused by centrifugal loadings on aluminum buckets produced by the Iranian Sina Ebtekar Company (ISECo) are investigated experimentally. In this study, 48 aluminum buckets are chosen from a set of 500 buckets. The numbers of service of the samples are accounted for a period of 7 months. Finite element analysis, FEM, is done for an aluminum bucket and the relevant maximum stresses due to the rotating loads of centrifugation are determined. Analyzing the numerical results and using the fatigue, lifetime diagrams according to the number of operating cycles is presented for the samples. A good consistency is observed between the experimental and numerical results. Based on the results, a new correlation is presented for estimating the aluminum bucket’s lifetime made by ISECO.
Highlights
The application of organized knowledge and skills in the form of devices, medicine, procedures and systems development to solve a health problem and improve quality of lives is referred as “health technology” [1]
ANALYSIS METHOD The present study focused on investigating the lifetime of 48 buckets in 3 blood bank centers in Mashhad
For analytical study of the lifetime of buckets, a chain of engineering steps were followed: a) determine loading conditions, b) model the system in a CAD software, c) analyze stress in an FEM software, d) extract lifetime results fatigue standard data based on maximum stress and e) use an innovative formula to construct some sample instructions for predicting the lifetime of buckets in a blood bank center and determine replacement time
Summary
The application of organized knowledge and skills in the form of devices, medicine, procedures and systems development to solve a health problem and improve quality of lives is referred as “health technology” [1]. The blood bank centrifuges are machines used to separate blood components like platelet, plasma and red blood cells. They rotates the blood bags placed in swing aluminum buckets with a rotational speed of 4000 to 5000 rpm [2]. Mechanical safety evaluation of rotating parts of the centrifuges is an important issue for designers, manufacturers of medical equipment and their operators. Aluminum buckets used as parts in centrifuges are used for keeping the liners included blood bags. It is obvious that these rotating parts are under heavy mechanical stresses during the centrifuge process [3,4,5,6,7]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Engineering, Technology & Applied Science Research
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
