Crackingmesoftly–themechanicsofhyperelasticKirigamistructures

CSC/WCPMjointseminar

EttoreBarbieri

EngineeringandMaterialsScience,QueenMaryUniversityofLondon

Monday,22ndMay,1p.m.

MAS2.05/2.06Seminarroom,MASbuilding

Abstract: Kirigami (from the Japanese切り kiru= to cut,紙 kami =paper) is the ancientJapaneseartofpapersculptures,anditconsistsofcuttingandstretchingasinglesheetofpaper.Thestretchcausesthecrackstoopenanddisplaythedecorativepattern.Fromthemechanical point of view, because of the cracks, a kirigamimetamaterialwill have lowerstrength than a pristine sheet. Nonetheless, the cracks will render the sheet morestretchable, hence tougher. Is there then a crack pattern that can achieve both highstrengthandhightoughness?Inthistalk,Iwillshowsimulationtoolsthatcanhelpanswerthisquestion,basedonmypreviousworksonmeshfreemethods.Inparticular,Iwillpresentanarc-lengthsolverabletohandleverysuddensnap-backsoccurringincrackspropagatingin soft materials under large strains. I will also show attempts to manufacture kirigamistructureswiththecorrespondingexperimentaluniaxialstress-straincurves.

Abuffetlunchisavailablefrom12:45pm.

Moreinfo:http://warwick.ac.uk/wcpm/seminars