Mechanics and Biomimetics of Suture Interfaces in Nature
Event details
| Date | 14.06.2012 |
| Hour | 11:15 |
| Speaker | Dr. Yaning Li, MIT |
| Location | |
| Category | Conferences - Seminars |
Analytical 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 governing the unique mechanical behavior of suture joints. For a single-waved suture joint, triangular sawtooth geometry is shown to provide a naturally optimized sawtooth geometry in maximizing tensile strength. Remarkable uniform stress fields are observed in both sawteeth and interfacial layer, thus providing advantages in load transmission, weight, stiffness, strength, energy absorption, and fatigue. Based on these bio-inspired mechanical models, biomimetic designs were developed and the physical constructs of model composite suture systems are fabricated via multi-material 3D printer (Objet Connex500). Tensile tests are conducted on samples covering a range in geometry, thus providing quantitative measures of stiffness, strength, and failure. The experiments include direct visualization of the deformation and show interesting failure mechanisms and their progression and transition with variation in geometry. The results provide quantitative guidelines for the design and tailoring of suture geometry to achieve the desired mechanical properties and also facilitate understanding of suture growth and fusion, and evolutionary phenotype.
Practical information
- General public
- Free
Organizer
- Menamkat Erika <[email protected]>
Contact
- Menamkat Erika <[email protected]>