Anticrack ndi Avalanche Kuyambitsa

Ndemanga

anticrack ndi mawonekedwe otsetsereka otsika omwe amadziwika ndi nucleation ndi kufalitsa kwa kukameta ubweya wa ubweya, osakanikirana-mode fractures kuti delaminate wosanjikiza ofooka pa dera lonse. Kugwa kopanda mzere komwe kumatha kuyambitsa ngozi ya chigumukire ndi kuyambitsa. M'nkhaniyi ife kuwerengera mkhalidwe wa nkhawa perturbation kwaiye ndi losavuta, chitsanzo anticrack. Tikuwonetsa kuti imapanga shear wave ndi matalikidwe omwe amadalira mphamvu ya wosanjikiza wofooka ndipo amatha kutanthauziridwa molingana ndi Griffith stress concentrator.. Kupsinjika maganizo kumeneku kumapanga ma fractures a en-echelon, zofanana ndi zomwe zikuwonetsedwa m'nkhaniyi. Tikuwonetsa kuti fractures za en-echelon zimathandizira kuti pakhale kusinthika kwakukulu kwa mafunde akugwa komanso kuwonjezereka kotsatira kwa mphamvu ya avalanche kinetic..

Mu zitsanzo zomwe brittle fracture imaganiziridwa, mng'alu umadziwika ndi parameter imodzi ya kukula, utali wozungulira kapena theka la kutalika kwa mng'alu, ndi wapadera khalidwe makina mphamvu, wotchedwa Crack Energy V(r). Kuwonjezera kupsyinjika ntchito mng'alu, mphamvu imeneyi imadaliranso kugwirizana, geometry, kupsyinjika kogwiritsidwa ntchito ndi zolakwika zilizonse zakuthupi (mwachitsanzo. pores).

Mu kufotokoza mosalekeza za kupsinjika maganizo mu ofooka wosanjikiza mawotchi mphamvu ya anticrack atha kugawidwa mu chopereka molingana ndi T2 ndi gawo lomwe liri molingana ndi s2. Timagwiritsa ntchito code ya BEM ya mbali ziwiri kuti tiwerengere kupsinjika komwe kumachitika ndi chitsanzo anticrack CB, ndikufanizira ndi zovuta zomwe zimapezeka ndi njira ya Eshelby. Pafupi ndi anticrack tip ndi anticrack yankho lili pafupi kwambiri ndi yankho la Eshelby, koma pa mtunda uliwonse kupyola pamenepa, kusagwirizana kumatsikira kucheperapo 1%.