Document Detail

Fatigue crack propagation behavior of ultrahigh molecular weight polyethylene.
MedLine Citation:
PMID:  6491807     Owner:  NLM     Status:  MEDLINE    
The relative fatigue crack propagation resistance of plain and carbon fiber-reinforced ultrahigh molecular weight polyethylene (UHMWPE) was determined from cyclic loading tests performed on compact tension specimens machined from the tibial components of total knee prostheses. Both materials were characterized by dynamic mechanical spectroscopy, X-ray diffraction, and differential scanning calorimetry. The cyclic tests used loading in laboratory air at 5 Hz using a sinusoidal wave form. Dynamic mechanical spectroscopy showed that the reinforced UHMWPE had a higher elastic storage modulus than the plain UHMWPE, whereas X-ray diffraction and differential scanning calorimetry showed that the percent crystallinity and degree of order in the crystalline regions were similar for the two materials. Fatigue crack propagation in both materials proved to be very sensitive to small changes in the applied cyclic stress intensity range. A 10% increase in stress intensity resulted in approximately an order of magnitude increase in fatigue crack growth rate. The fatigue crack propagation resistance of the reinforced UHMWPE was found to be significantly worse than that of the plain UHMWPE. This result was attributed to poor bonding between the carbon fibers and the UHMWPE matrix and the ductile nature of the matrix itself.
G M Connelly; C M Rimnac; T M Wright; R W Hertzberg; J A Manson
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of orthopaedic research : official publication of the Orthopaedic Research Society     Volume:  2     ISSN:  0736-0266     ISO Abbreviation:  J. Orthop. Res.     Publication Date:  1984  
Date Detail:
Created Date:  1984-11-23     Completed Date:  1984-11-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8404726     Medline TA:  J Orthop Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  119-25     Citation Subset:  IM    
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MeSH Terms
Joint Prosthesis*
Knee Prosthesis
Microscopy, Electron, Scanning
Molecular Weight
Stress, Mechanical
Reg. No./Substance:
0/Plastics; 0/Polyethylenes; 0/plastic, carbon fiber reinforced; 7440-44-0/Carbon

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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