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SUMMARY:MechE Seminar: Advancing composite & multimaterial manufacturing v
 ia in-situ tomography and rotational multimaterial 3D printing
DTSTART:20230124T100000
DTEND:20230124T110000
DTSTAMP:20260406T144346Z
UID:cedc4996a216d999dda28140543d78f60cabe1466a6f32c17635e156
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Natalie M. Larson\, Lewis Lab\, Harvard University\nAbstra
 ct: Fibrous and helical architectures are ubiquitous in natural systems du
 e to their unique mechanical behavior and functionality. Synthetic materia
 ls based on these architectures have the potential to transform the engine
 ering landscape for applications ranging from aerospace to soft robotics. 
 In this talk\, I will present research from two fields aimed at advancing 
 the manufacturing of composite and multimaterial systems based on these ar
 chitectures. First\, I will show how in-situ X-ray computed tomography has
  been used to provide new insights on microstructure evolution during proc
 essing of fiber-reinforced ceramic matrix composites for more efficient ae
 rospace engines. Key findings include elucidating coupled effects of capil
 lary number\, fiber movement and preferred flow channeling on axial permea
 bility of fiber beds\, development of a unified taxonomy of pyrolysis crac
 k geometries\, and quantification of the effects of local microstructural 
 dimensions on pyrolysis crack formation. Second\, I will present a rotatio
 nal multimaterial 3D printing system that enables subvoxel control over th
 e local orientation of architected filaments. This system enables fabricat
 ion of helical filaments with programmable helix angle\, layer thickness\,
  and interfacial area between multiple materials within a given cylindrica
 l voxel. Using this system\, we have fabricated functional artificial musc
 les composed of helical dielectric elastomer actuators\, and “springy”
  filaments and lattices composed of stiff springs within a compliant matri
 x.\n\nBiography: Natalie M. Larson is currently a postdoctoral research fe
 llow in Jennifer Lewis’ Lab at Harvard University. She earned her Ph.D. 
 in Materials from the University of California\, Santa Barbara and her B.S
 . in Materials Science and Engineering from the University of Washington. 
 She is interested in developing advanced digital manufacturing methods\, i
 ncluding subvoxel 3D printing\, to create new classes of hierarchical mult
 imaterial and composite systems for applications ranging from aerospace to
  soft robotics. She is also interested in developing in-situ X-ray compute
 d tomography techniques to advance the fundamental science linking materia
 ls processing\, structure and performance.
LOCATION:BM 5202 https://plan.epfl.ch/?room==BM%205202 https://epfl.zoom.u
 s/j/65541739213
STATUS:CONFIRMED
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