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2013
Journal article
Finite element modelling versus classic beam theory: comparing methods for stress estimation in a morphologically diverse sample of vertebrate long bones
Classic beam theory is frequently used in biomechanics to model the stress behaviour of vertebrate long bones, particularly when creating intraspecific scaling models. Although methodologically straightforward, classic beam theory requires complex irregular bones to be approximated as slender beams, and the errors associated with simplifying complex organic structures to such...Brassey, Charlotte A ; Margetts, L ; Kitchener, Andrew C ; Withers, P J ; Manning, Phillip L …
cross-sectional asymmetry, biomechanics, curvature, Finite element analysis, and beam theory
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2012
Journal article
Tomographic reconstruction of neopterous Carboniferous insect nymphs
Two new polyneopteran insect nymphs from the Montceau-les-Mines Lagerstätte of France are presented. Both are preserved in three dimensions, and are imaged with the aid of X-ray micro-tomography, allowing their morphology to be recovered in unprecedented detail. One–Anebos phrixos gen. et sp. nov.–is of uncertain affinities, and preserves portions of...Garwood, R ; Ross, Andrew ; Sotty, D ; Chabard, D ; Charbonnier, S …
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2013
Journal article
The role of cross-sectional geometry, curvature and limb posture in maintaining equal safety factors: A computed tomography study
The limb bones of an elephant are considered to experience similar peak locomotory stresses as a shrew. "Safety factors" are maintained across the entire range of body masses through a combination of robusticity of long bones, postural variation, and modification of gait. The relative contributions of these variables remain uncertain....Brassey, Charlotte A ; Kitchener, Andrew C ; Withers, P J ; Manning, Phillip L ; Sellers, William I
posture, force, safety factors, cross-sectional geometry, and effective mechanical advantage (EMA)