Acoustic Emission Based Surveillance System for Prediction of Stress Fractures
Abstract
Stress fractures of bone constitute the most serious musculoskeletal overuse injury during military training of male and female recruits. We believe that the cascade of events in stress fractures is structured as the upregulation of bone turnover, amplification of porosity, induction of greater local strains and associated increase in damage activity a priori to fracture. The hypothesis of our study is that the onset of stress fractures can be predicted by monitoring the evolution of microdamage activity using acoustic emissions. During the first year bone tissue was procured and amassed for specimen preparation. A sufficient number of donor tibias have been obtained and have been machined into test specimens. The test system was redesigned after the first year to improve the performance of both the mechanical testing as well as the acoustic emission detection of microdamage events. Different groups of beams will be tested to varying degrees of mechanical property degradation and histological examination will be used to determine the relationship between the acoustic event parameters and the microdamage morphology. The first group of beams are to be tested in fatigue until failure and these tests are currently underway.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2005
- Accession Number
- ADA442859
Entities
People
- Nicholas Wasserman
- Ozan Akkus
Organizations
- University of Toledo