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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
Published on: April 11, 2018
Discrete element analysis in musculoskeletal biomechanics
E Y S Chao1, K Y Volokh, H Yoshida
1Orthopaedic Biomechanics Laboratory, Johns Hopkins University, Baltimore, Maryland 21205-2196, USA. eyschao@yahoo.com
Molecular & Cellular Biomechanics : MCB
|December 15, 2010
Summary
A new Discrete Element Analysis (DEA) method models joint contact pressure and bone-implant stresses. This biomechanics approach offers faster, easier analysis for irregular joint geometries compared to traditional methods.
Area of Science:
- Biomechanics
- Applied Mechanics
- Computational Modeling
Background:
- Professor Y. C. Fung's contributions to biomechanics.
- Rigid Body-Spring Model theory for structural analysis.
- Need for advanced methods in musculoskeletal biomechanics.
Purpose of the Study:
- Derive a generalized Discrete Element Analysis (DEA) method.
- Determine human articular joint contact pressure, ligament tension, and bone-implant stresses.
- Evaluate DEA's efficacy against established methods.
Main Methods:
- Generalized Discrete Element Analysis (DEA) formulation.
- Incorporation of non-linear springs for cartilage.
- Numerical implementation for linear and non-linear problems.
- 2D plane-strain analysis for bone-implant interface.
Main Results:
- DEA produced results comparable to Hertzian solution and Finite Element Modeling (FEM).
- Successfully analyzed human knee and hip joint contact.
- Evaluated femoral joint prosthesis stem/bone interface stresses.
- Demonstrated DEA's advantages in model creation and computational time for irregular geometries.
Conclusions:
- The generalized DEA method is effective for analyzing joint contact and interface stresses.
- DEA offers computational advantages for complex joint geometries.
- Finite Element Analysis (FEA) remains preferred for detailed joint tissue stress analysis.
