2026-04-14T03:59:40Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/3958692026-02-07T07:39:26Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Pensalfini, Marco author Duenwald Kuehl, Sarah author Kondratko Mittnacht, Jaclyn author Lakes, Roderic author Vanderby, Ray author 2014-07-15 The mechanical effect of a partial thickness tear or laceration of a tendon is analytically modeled under various assumptions and results are compared with previous experimental data from porcine flexor tendons. Among several fibril-level models considered, a shear-lag model that incorporates fibril–matrix interaction and a fibril–fibril interaction defined by the contact area of the interposed matrix best matched published data for tendons with shallow cuts (less than 50% of the cross-sectional area). Application of this model to the case of many disrupted fibrils is based on linear superposition and is most successful when more fibrils are incorporated into the model. An equally distributed load sharing model for the fraction of remaining intact fibrils was inadequate in that it overestimates the strength for a cut less than half of the tendon's cross-sectional area. In a broader sense, results imply that shear-lag contributes significantly to the general mechanical behavior of tendons when axial loads are nonuniformly distributed over a cross section, although the predominant hierarchical level and microstructural mediators for this behavior require further inquiry. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Ciències de la salut::Medicina Tendons--Wounds and injuries Biomechanics Muscles--Mechanical properties Global load sharing Shear-lag Tendon Laceration Tendons--Ferides i lesions Biomecànica Músculs--Propietats mecàniques Evaluation of global load sharing and shear-lag models to describe mechanical behavior in partially lacerated tendons