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SUMMARY:Mechanics and Biomimetics of Suture Interfaces in Nature
DTSTART:20120614T111500
DTSTAMP:20260429T141507Z
UID:f18476252b4d26a54ff3e7f42834ff2ec32b4cb02fcc935368e2b05d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Yaning Li\, MIT\nAnalytical and numerical composite models
  are formulated for the two types of suture morphology to investigate the 
 underlying mechanisms and the role of geometry including sawtooth shape\, 
 volume fraction\, suture wavelength\, amplitude\, and hierarchy in governi
 ng the unique mechanical behavior of suture joints. For a single-waved sut
 ure joint\, triangular sawtooth geometry is shown to provide a naturally o
 ptimized sawtooth geometry in maximizing tensile strength. Remarkable unif
 orm stress fields are observed in both sawteeth and interfacial layer\, th
 us providing advantages in load transmission\, weight\, stiffness\, streng
 th\, energy absorption\, and fatigue. Based on these bio-inspired mechanic
 al models\, biomimetic designs were developed and the physical constructs 
 of model composite suture systems are fabricated via multi-material 3D pri
 nter (Objet Connex500). Tensile tests are conducted on samples covering a 
 range in geometry\, thus providing quantitative measures of stiffness\, st
 rength\, and failure.  The experiments include direct visualization of th
 e deformation and show interesting failure mechanisms and their progressio
 n and transition with variation in geometry. The results provide quantitat
 ive guidelines for the design and tailoring of suture geometry to achieve 
 the desired mechanical properties and also facilitate understanding of sut
 ure growth and fusion\, and evolutionary phenotype.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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