Determination of stress and displacement on human composite pelvis under static and dynamic loading

Abstract

This case study describes the experimental determination of displacements and stresses on a composite model of a pelvis that was modified to represent a healthy intact pelvic ring. The modified model was stressed statically up to 1750 N to simulate standing on one leg and also cyclically to model walking. For two different model settings in the loading machine the values of displacements and stresses at the pelvic ring were determined. The two different settings correspond to two different loading vectors applied on the pelvic ring, boundary conditions and degrees of freedom. The experimentally determined values of displacements in both settings are very similar and in accordance with the knowledge on the behaviour of a real human pelvis. The modified model is thus suitable for testing of newly developed implants for pelvis treatment and experimental determination of displacements and stresses in pelvic ring which are caused by application of implants.

Exploring 3D Pelvis Orientation: A Cross-Sectional Study in Athletes Engaged in Activities with and without Impact Loading and Non-Athletes

“…The orientation of the pelvis, that is, the direction to which the pelvis is pointed, may be affected further by forces generated from various intrinsic factors such as musculoskeletal deviations in the spine (e.g., scoliosis) and lower limbs (e.g., leg length discrepancy), as well as pathologies and/or injuries (e.g., spine trauma) [ 11 , 12 ]. Moreover, the orientation of the pelvis can be influenced beyond what is typically observed in the general population when additional external loads are applied, thereby exacerbating their impact [ 13 , 14 ]. These loads can cover a spectrum of impact, ranging from excessively high—such as those occurring momentarily in falls or traffic accidents—to moderate or low, like those applied occasionally or repeatedly during sporting activities [ 8 ].…”