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PRODID:-//Columba Systems Ltd//NONSGML CPNG/SpringViewer/ICal Output/3.3-
 M3//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261030T120843Z
DTSTART:20261102T150000Z
DTEND:20261102T160000Z
SUMMARY:Mathematics of Waves and Materials Seminar - Amir Ghasemkhani
UID:{http://www.columbasystems.com/customers/uom/gpp/eventid/}agp-mvuww4h
 0-58ty5z
DESCRIPTION:Title: Microstructure-Informed Modelling of the Achilles Tend
 on Using Continuum Beam Finite Elements\n\nAbstract:\nThe mechanical beh
 aviour of the Achilles tendon depends on its collagen microstructure and
  twisted subtendon architecture. We investigate these contributions usin
 g an Absolute Nodal Coordinate Formulation (ANCF) finite-element framewo
 rk\, comparing the Gasser–Ogden–Holzapfel (GOH) model with a microstruct
 urally motivated Fibre Length Distribution (FLD) model that explicitly d
 escribes progressive fibril recruitment. Using MRI-derived human Achille
 s tendon geometry and experimental constitutive data\, the FLD model bet
 ter captures the initial nonlinear toe region. Shorter fibrils recruit e
 arlier and produce a stiffer response\, whereas longer fibrils delay rec
 ruitment and increase compliance. We further examine the effects of init
 ial pretwist on the medial gastrocnemius\, lateral gastrocnemius\, and s
 oleus subtendons. At this stage\, each subtendon is modelled separately 
 to isolate the effects of pretwist and microstructural variation. Increa
 sing pretwist reduces elongation under the same applied load\, with grea
 ter sensitivity in the gastrocnemius subtendons than in the soleus. The 
 next stage will assemble the three subtendons in their pretwisted arrang
 ement and incorporate contact and mechanical interaction to investigate 
 the response of the complete Achilles tendon.\n\n 
STATUS:TENTATIVE
TRANSP:TRANSPARENT
CLASS:PUBLIC
LOCATION:Frank Adams 2\, Alan Turing Building\, Manchester
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