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UID:6235fd94b144587864d60baf1c9318d9
CATEGORIES:Applied and Computational Math Seminar
CREATED:20240413T013041
SUMMARY:Two tales of slenderness and confinement: mechanics of wrinkled sheets and jammed filaments
LOCATION:Hill 705
DESCRIPTION:<div style="border: 0px; font-style: normal; font-weight: 400; font-size: 1
 2pt; line-height: inherit; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MS
 FontService, Calibri, Helvetica, sans-serif; margin: 0px; padding: 0px; ver
 tical-align: baseline; letter-spacing: normal; orphans: 2; text-indent: 0px
 ; text-transform: none; widows: 2; word-spacing: 0px; white-space: normal; 
 text-align: left;">The first part of my talk will consider a thin, circular
 , elastic sheet adhered to the surface of a liquid droplet of increasing cu
 rvature. Geometric frustration causes it to buckle, first forming a pattern
  of smooth wrinkles, then sharp crumpled features at higher curvature. Thes
 e steps can be seen as two distinct symmetry breaking instabilities: that o
 f shape and stress field, respectively, driven by one non-dimensional confi
 nement parameter, according to coupled experiments and theoretical analysis
 .</div><div style="border: 0px; font-style: normal; font-weight: 400; font-
 size: 12pt; line-height: inherit; font-family: Aptos, Aptos_EmbeddedFont, A
 ptos_MSFontService, Calibri, Helvetica, sans-serif; margin: 0px; padding: 0
 px; vertical-align: baseline; letter-spacing: normal; orphans: 2; text-inde
 nt: 0px; text-transform: none; widows: 2; word-spacing: 0px; white-space: n
 ormal; text-align: left;">In the second part, I will present a preliminary 
 study of the emergent mechanics of packings of unbonded, semiflexible, athe
 rmal fibers, inspired by the highly non-intuitive nest-building strategy of
  birds. &nbsp;Through complementary physical and computational measurements
  of mechanical resonse under oedometric compression, we reveal micromechani
 cal origins of some basic features of this class of disordered metamaterial
 , relating non-linear stiffness and quasistatic hysteresis to the reversibl
 e formation and motion of internal contacts.</div><div style="border: 0px; 
 font-style: normal; font-weight: 400; font-size: 12pt; line-height: inherit
 ; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Hel
 vetica, sans-serif; margin: 0px; padding: 0px; vertical-align: baseline; le
 tter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; w
 idows: 2; word-spacing: 0px; white-space: normal; text-align: left;">In eit
 her case, we find that generic confinement of slender bodies gives rise to 
 phenomenology that is surprisingly rich, but can be reduced to understandab
 le models and motifs.</div>
CONTACT:Hunter King (Rutgers University)
DTSTAMP:20260907T130826
DTSTART;TZID=America/New_York:20240417T110000
DTEND;TZID=America/New_York:20240417T120000
SEQUENCE:0
TRANSP:OPAQUE
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