?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Feprints.imtlucca.it%2F3120%2F&rft.title=Optimal+design+of+auxetic+hexachiral+metamaterials+with+local+resonators&rft.creator=Bacigalupo%2C+Andrea&rft.creator=Lepidi%2C+Marco&rft.creator=Gnecco%2C+Giorgio&rft.creator=Gambarotta%2C+Luigi&rft.subject=QA75+Electronic+computers.+Computer+science&rft.subject=T+Technology+(General)&rft.description=A+parametric+beam+lattice+model+is+formulated+to+analyse+the+propagation+properties+of+elastic+in-plane+waves+in+an+auxetic+material+based+on+a+hexachiral+topology+of+the+periodic+cell%2C+equipped+with+inertial+local+resonators.+The+Floquet-Bloch+boundary+conditions+are+imposed+on+a+reduced+order+linear+model+in+the+only+dynamically+active+degrees-offreedom.+Since+the+resonators+can+be+designed+to+open+and+shift+band+gaps%2C+an+optimal+design%2C+focused+on+the+largest+possible+gap+in+the+low-frequency+range%2C+is+achieved+by+solving+a+maximization+problem+in+the+bounded+space+of+the+significant+geometrical+and+mechanical+parameters.+A+local+optimized+solution%2C+for+a+the+lowest+pair+of+consecutive+dispersion+curves%2C+is+found+by+employing+the+globally+convergent+version+of+the+Method+of+Moving+asymptotes%2C+combined+with+Monte+Carlo+and+quasi-Monte+Carlo+multi-start+techniques.&rft.publisher=arXiv&rft.date=2015&rft.type=Working+Paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.rights=cc_by_nc&rft.identifier=http%3A%2F%2Feprints.imtlucca.it%2F3120%2F1%2F1510.04543.pdf&rft.identifier=++Bacigalupo%2C+Andrea+and+Lepidi%2C+Marco+and+Gnecco%2C+Giorgio+and+Gambarotta%2C+Luigi++Optimal+design+of+auxetic+hexachiral+metamaterials+with+local+resonators.++Working+Paper+++arXiv+++++++++&rft.relation=http%3A%2F%2Farxiv.org%2Fabs%2F1510.04543