Fatigue life prediction in a cancellous bone structure
Repetitive cyclic loading of bone during daily course activities is one of the primary causes of bone fracture in humans. Stress fractures and fragility fractures in elderly generation due to osteoporosis have been associated with the reduction of bone strength of the cancellous bone. The aim of thi...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/42125/1/NurDianahAbdLatiffMFKM2013.pdf |
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| Summary: | Repetitive cyclic loading of bone during daily course activities is one of the primary causes of bone fracture in humans. Stress fractures and fragility fractures in elderly generation due to osteoporosis have been associated with the reduction of bone strength of the cancellous bone. The aim of this study is to predict the failure of cancellous bone as a function of density and porosity. In this present study, two of cancellous specimens were extracted from bovine medial-condyle bone and were loaded in cyclic compression. Monotonic compressions were first tested to determine the boundary conditions prior to the fatigue testing. The loading transferred to the cancellous bone are chosen between 16%-55% of the ultimate stress. The result showed different hysteresis loop with large variation in strain between both medialcondyle of cancellous bone. They both adapt different physiological apparent load until failure. From the obtained result, we can conclude that the same anatomic site with different value of bone density and porosity imply a large effect of the fatigue behavior in related to modulus degradation and strain changes |
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