UNCONSTRAINED SHEAR FAILURE OF THE OSTOECHONDRAL REGION AT LOW STRAIN RATES. DAVID R. FOUST MEMORIAL FUND AWARD PAPER

The effect of strain rate on the mechanism of failure of the osteochondral region of immature and mature cartilage on bone in unconstrained shear, loaded through the cartilage layer only, is examined. Strain rate did not affect the fracture mechanism or the fracture load levels in either tissue but only influenced the extent of cartilage deformation before fracture initiation. The exact mechanism of osteochondral failure was found to be the same as observed during impact loading where it depended on skeletal maturity only. Shear fracture of the immature tissue always occurred subchondrally and progressed in a stepwise manner by the propagation of a relatively large crack. By contrast failure in the skeletally mature tissue occurred by the advance of a much smaller crack which propagated within the well-defined tidemark region. (A) For the covering abstract of the conference see IRRD 873507.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 375-92

Subject/Index Terms

Filing Info

  • Accession Number: 00714325
  • Record Type: Publication
  • Source Agency: Institute for Road Safety Research, SWOV
  • Files: ITRD
  • Created Date: Dec 27 1995 12:00AM