D. J. McBride, R. L. Trelstad, F. H. Silver

Research output: Contribution to journalConference articlepeer-review


The ultimate tensile strength (UTS) of the developing chick tendon was measured in order to assess structure-property relationships of the developing tendon. These measurements were correlated with the microanatomy of failed tendons during morphogenesis. The following stages of chick development were studied: 40 (day 14), 42 (day 16), 43 (day 17), HO (hatching), and H2 (2 days post hatching). Our results suggest that the rapid increase in tensile strength observed between stage 40 and stage 43 represents early biomechanical competency. During this period it is hypothesized that the collagen fibrils and/or fibril bundles become continuous, reinforcing the tendon. This conclusion is suggested by a composite theory which predicts that fibrils will be pulled out of the interfibrillar matrix if the fibril length is much less than the critical length (L//c). Therefore, in conjunction with increased fibril diameters, an increase in fibril or fibril bundle length by end-to-end anastomosis could account for a large part of the increase in tensile strength observed. Microstructural observations also support this theory.

Original languageEnglish (US)
Pages (from-to)213-216
Number of pages4
JournalAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
StatePublished - 1987

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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