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DTSTART:20240331T030000
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DTSTART:20231029T020000
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DTSTAMP:20260424T114134Z
UID:1710752400@ist.ac.at
DTSTART:20240318T100000
DTEND:20240318T110000
DESCRIPTION:Speaker: Fred MacKintosh\nhosted by Carl Goodrich\nAbstract: Th
 e mechanics of cells and tissues are largely governed by scaffolds of fila
 mentous proteins. Particularly common examples of these are the collagen f
 iber networks of extracellular matrices. There is now increasing evidence 
 that the mechanics of such fibrous structures are governed by underlying m
 echanical phase transitions reminiscent of the rigidity transition identif
 ied by Maxwell for macroscopic engineering structures: networks of struts 
 or springs exhibit a continuous\, second-order phase transition at the iso
 static point\, where the number of constraints imposed by connectivity jus
 t equals the number of mechanical degrees of freedom. By contrast\, fibrou
 s networks in 3D exhibit a line of critical transitions as a function of s
 train rather than connectivity. These transitions have shown remarkable ri
 chness\, including non-mean-field critical behavior. We will present recen
 t theoretical predictions and experimental evidence for such strain-contro
 lled mechanical phase transitions in biopolymer networks\, as well as some
  of the resulting elastic and dynamic signatures and anomalies such as an 
 unexpectedly large Poisson ratio and slow stress relaxation.
LOCATION:Moonstone Bldg / Ground floor / Seminar Room E\, ISTA
ORGANIZER:
SUMMARY:Fred MacKintosh: Mechanical Critical Phenomena in Biopolymer Networ
 ks
URL:https://talks-calendar.ista.ac.at/events/4857
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