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Stress relaxation behaviour of trabecular bone specimens
D D Deligianni1, A Maris, Y F Missirlis
1Department of Mechanical Engineering, University of Patras, Rion, Greece.
Journal of Biomechanics
|December 1, 1994
Summary
This study reveals that trabecular bone exhibits non-linear viscoelastic and anisotropic behavior under compression. These findings are crucial for understanding bone mechanics and developing accurate biomechanical models.
Area of Science:
- Biomechanics
- Materials Science
- Orthopedics
Background:
- Trabecular bone exhibits complex mechanical properties.
- Understanding its viscoelasticity is key for biomechanical applications.
- Previous models may not fully capture its anisotropic nature.
Purpose of the Study:
- To investigate the viscoelastic behavior of trabecular bone under compressive loading.
- To characterize the anisotropic properties of femoral head trabecular bone.
- To propose a viscoelastic model for trabecular bone.
Main Methods:
- Performed stress relaxation tests on cubic trabecular bone specimens.
- Applied three strain levels and three loading directions.
- Determined a spectrum of relaxation times using a proposed viscoelastic model.
Main Results:
- Trabecular bone demonstrates non-linear viscoelastic behavior.
- Anisotropic mechanical properties were observed.
- The proposed model characterizes the observed behavior.
Conclusions:
- Trabecular bone's mechanical response is non-linear and anisotropic.
- The study provides a model for characterizing trabecular bone viscoelasticity.
- Findings are relevant for orthopedic biomechanics and implant design.