Multi Fracture/Delamination Analysis of Composites Subjected to Impact Loadings

A combined finite/ discrete element method is presented for modellingcomposite specimens subjeded to dynamic/impact loadings. the main taskis set on developing an algorithm for simulation of potential bonding anddebonding/delarnination phenomena during impact or qenera! dynamic loadingconditions. in addition. full fracture li'f1alysis also be pcrjormed. the proposedapproach. adopts a general node to face nonlinear jrictiouo) contact algorithmto enforce bonding/debonding constraints btjwern composite plies. the methodi8 also capable of analyzinq progressive [racturc and .!jytgnwntrdion beluunour aswell as potential post cracking interactions caused [ry the newly created r:raeksides and scqnicn:«. a loud rettieslusu; teciuiiqne is adopted every time a newcrack is [ormed. uihil»: an onerall remeshing is performed aruitinu: a certaincriterion of (:,(7ot estimation is violated. the special local retnesliitu; tecluuqueis de.,i.i]ncd to qcoinetricallsj model ilti individurd crack by sp/dting the dement.sepmnting the failed node. crcatin.1f tieu. nodes and dividing the nciqhbornu;clemenis to preserne the eornpatibllity corulitions. the same procedure 'is capableoj modelling opplieation of jibrc rein/o1(;((1 !jolyllut (frp) layer's to otheren.gineering structures in order to unprorc their fie:rible bciuiuior in static «nddimamu: loadinq contlitiou».