?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Feprints.imtlucca.it%2F3220%2F&rft.title=On+fracture+criteria+for+dynamic+crack+propagation+in+elastic+materials+with+couple+stresses&rft.creator=Morini%2C+Lorenzo&rft.creator=Piccolroaz%2C+Amdrea&rft.creator=Mishuris%2C+Gennady&rft.creator=Radi%2C+Enrico&rft.subject=TA+Engineering+(General).+Civil+engineering+(General)&rft.subject=TH+Building+construction&rft.description=The+focus+of+the+article+is+on+fracture+criteria+for+dynamic+crack+propagation+in+elastic+materials+with+microstructures.+Steady-state+propagation+of+a+Mode+III+semi-infinite+crack+subject+to+loading+applied+on+the+crack+surfaces+is+considered.+The+micropolar+behavior+of+the+material+is+described+by+the+theory+of+couple-stress+elasticity+developed+by+Koiter.+This+constitutive+model+includes+the+characteristic+lengths+in+bending+and+torsion%2C+and+thus+it+is+able+to+account+for+the+underlying+microstructures+of+the+material.+Both+translational+and+micro-rotational+inertial+terms+are+included+in+the+balance+equations%2C+and+the+behavior+of+the+solution+near+to+the+crack+tip+is+investigated+by+means+of+an+asymptotic+analysis.+The+asymptotic+fields+are+used+to+evaluate+the+dynamic+J-integral+for+a+couple-stress+material%2C+and+the+energy+release+rate+is+derived+by+the+corresponding+conservation+law.+The+propagation+stability+is+studied+according+to+the+energy-based+Griffith+criterion+and+the+obtained+results+are+compared+to+those+derived+by+the+application+of+the+maximum+total+shear+stress+criterion.&rft.publisher=arXiv&rft.date=2013&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%2F3220%2F1%2F1304.6019v7.pdf&rft.identifier=++Morini%2C+Lorenzo+and+Piccolroaz%2C+Amdrea+and+Mishuris%2C+Gennady+and+Radi%2C+Enrico++On+fracture+criteria+for+dynamic+crack+propagation+in+elastic+materials+with+couple+stresses.++Working+Paper+++arXiv+++++++(Submitted)+++&rft.relation=http%3A%2F%2Farxiv.org%2Fabs%2F1304.6019