MultiBones: Human Multibody Simulation Model for Structural Analysis of Bones
(Nachwuchsföderung der Universität Innsbruck)

Bone and ligament injuries are one of the most common serious injuries in sports. To prevent such injuries, it is necessary to understand the underlying injury mechanism and related risk factors. Nowadays, musculoskeletal simulation models have become more and more popular to investigate injury situations on a computer. A musculoskeletal simulation model consists of a multibody model (representing the skeleton) and muscles, which actuate the movement of the skeleton. In the existing musculoskeletal simulation models, bones have so far been modelled with so-called rigid segments. Since rigid bodies are not deformable, some mechanical behaviour of bones are not being considered. Further, bone injuries or effects on the bone structure in human movements can not be analysed by these musculoskeletal simulation models.

In this project a computational approach has been developed that allows for investigation of the upper extremeties by a simulation model considering the structural behaviour of bones. The rigid bones in the multibody model has been replaced by Euler-Bernoulli beams. Modelling the bones as Euler-Bernoulli beams required biomechanic and -metric data for the bones. Measurements has been conducted at the Department of Trauma Surgery at the Medical University of Innsbruck. The biomechanic parameters of the bones were determined from inverse problems.


The findings of this project provide important information to investigate the structural behaviour of bones, reconstruction plates, prostheses, etc. in musculoskeletal simulation models in the future.

The developed approach was used to simulate a fracture of the ulna during a fall.

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