Wire tension versus wire frequency: An experimental Ilizarov frame study |
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Authors: | Valentina La Russa Bjørn Skallerud Jomar Klaksvik Olav A Foss |
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Institution: | 1. State Key Laboratory of Disaster Reduction in Civil Engineering, Shanghai 200092, China;2. College of Civil Engineering, Tongji University, Shanghai, 200092, China;3. Department of Civil Engineering, McMaster University, Ontario, Canada |
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Abstract: | Stability of an Ilizarov frame highly depends on maintenance of adequate tension in the wires. Wire tension should be measured accurately in experimental laboratory studies when new types of wire fixators are tested. In this study, 20 wires were tested using two different wire fixators. The wires were sequentially tensioned from 0 to 1275 N in 50 N intervals. For each tension value, corresponding vibration frequency was recorded. We then described the relationship between wire tension and wire vibration frequency in an empirical equation (R2=99.8). Wire vibration frequency can also be described theoretically by the Euler–Bernoulli equation for a thin beam. Theoretical frequencies were calculated and compared with corresponding experimental frequencies. A close agreement was found (95% limits of agreement, ±3.2 Hz). This empirical equation represents a simple tool, applicable when investigating the effect of new wire fixators, pre-tensioning and frame constructions on wire tension. |
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