This study investigates the isolated effect of rib shape on the mechanical characteristics of ribs subjected to multiple forms of loading. It aims to measure the variation in stiffness due to shape that is seen throughout the population and, in particular, provide a tool for researchers to better understand the influence of shape on resulting stiffness.A previously published six-parameter shape model of the central axis of human ribs was used. It has been shown to accurately model the overall rib path using intrinsic geometric properties such as size, aspect ratio, and skewness, through shapes based on logarithmic spirals with high curvature continuity. In this study the model was fitted to 19,500 ribs from 989 adult female and male CT scans having demographic distributions matching the US adult population. Mechanical loading was simulated through a simplified finite element model aimed at isolating rib shape from other factors influencing mechanical response. Four loading scenarios were used representing idealized free and constrained loading conditions in axial (body-anterior) and lateral directions. Characteristic rib stiffness and maximum stress location were tracked as simulation output measures.Regression models of rib stiffness found that all shape model parameters added information when predicting stiffness under each loading condition, with their linear combination able to account for 95% of the population stiffness variation due to shape in mid-level ribs for free axial loading, and 92%-98% in other conditions. Full regression models including interactive terms explained up to 99% of population variability. Results allow researchers to better evaluate the differences in stiffness results that are obtained from physical testing by providing a framework with which to explain variation due to rib shape.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    The Effect of Rib Shape on Stiffness




    Erscheinungsdatum :

    2016



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    High stiffness shape memory alloy actuated aerostructure

    WIDDLE RICHARD D / GRIMSHAW MATTHEW T / CROSSON-ELTRUAN KAVA S et al. | Europäisches Patentamt | 2019

    Freier Zugriff

    PYLON SHAPE WITH GEARED TURBOFAN FOR STRUCTURAL STIFFNESS

    GUKEISEN ROBERT L | Europäisches Patentamt | 2020

    Freier Zugriff

    PYLON SHAPE WITH GEARED TURBOFAN FOR STRUCTURAL STIFFNESS

    GUKEISEN ROBERT L | Europäisches Patentamt | 2015

    Freier Zugriff


    PYLON SHAPE WITH GEARED TURBOFAN FOR STRUCTURAL STIFFNESS

    GUKEISEN ROBERT L | Europäisches Patentamt | 2023

    Freier Zugriff