Issue 15

F. B

erto et alii, Fra

ttura ed Integrità

Strutturale, 15

(2011) 14-20;

DOI: 10.3221/IG

F-ESIS.15.02

E el

sistenza littici so

del m ggette

odo O i a modo

n piast II

re tridim

ension

ali con

fori ci

rcolari e

d

O ci

n the m rcular a

ode O nd ellip

existen tical ho

ce in t les und

hree-di

mensio

nal plat ding

es wea

kened b

y

er mod

e II loa

Fil Un ber

ippo Berto iversità di Pa to@gest.unipd

, Christia dova, Diparti .it

n Marango mento di tecni

n ca e gestione d

ei sistemi indu

striali, Strade

lla S.Nicola 3

, 36100 Vi

cenza (Italy)

STRACT . It isson’s effec numerical ght play a ro e opening mutual inci aling with c the literatur de O. On th An out-of-p previously d also for fini Out-of-plan intensity of The strain dependent the plate t dimensiona ASSUNTO . I eratura dim oppiata al c centi analisi piastre intag rtura dell’in o ad ora eff fetto di un r

is known f t leads to th analyses hav le in failure angle. Since dence of th ircular and e. The main e basis of a lane mode emonstrate te values of e mode re this stress c energy den is a paramet hickness. I lity is not ne l problema ostrando ch arico estern teoriche e n liate a spigo taglio magg ettuate hann aggio di rac

or long tim e generatio e shown th initiation p the degree e two mode elliptic hole aim of this large bulk o is present d for plates the notch ra sults in a s omponent s sity average er suitable t is surely gligible, or di una pia e l’effetto o applicato umeriche h lo vivo. Il n iori di 102. o riguardat cordo diver

e that in a n of a coup at this effec henomena i of singulari s depends o s, the presen work is to d f numerica in plates w weakened b dius. hear stress trongly dep d on a giv for the natu a powerfu is not know stra criccat del coefficie e non conte anno eviden uovo modo 6° e cioè qu o piastre in so da zero a

cracked pla led out-of-p t is present n plates und ty character n the comp ce or not o emonstrate l results the eakened by y cracks an distribution ends on the en control ral of captu l tool in p n in detail. a tridimens nte di Pois mplata dalla ziato come (denomina ando il mo debolite da ll’apice dell’

te subjected lane singula also in plate er mode II ising the mo onent size. f the out-of the existen following co U-notches d pointed V symmetric Poisson’s r volume wh re all three ractical cas ionale sogg son provoc soluzione p questo effe to modo O do II risulta cricche o in intaglio.

to anti-sym r mode (M s weakened loading par de O is gre -plane mod ce of a three nclusions c and subject -notches; it with respe atio  . It inc ich should dimensiona es where t etta a modo a l’insorger iana di Will tto tridimen ) rimane sin essere non tagli a spigo

metric plan ode O). Rec by pointed ticularly in t ater than th e has never -dimension an be drawn ed to Mode s intensity i ct to the m reases as  i , in princip l effects occ he role pla II è stato e di una nu iams. sionale sia golare anch singolare. lo vivo non

e loading, ent theoret V-notches a he presence at of mode been discus al effect tied : II loading s not neglig id-plane. T ncreases. le, be mate urring thro yed by th affrontato ova singola presente anc e per angol Tutte le ana consideran

the ical nd of II, sed to , as ible he rial ugh ree- in rità he i di

A B Po and mi larg the De in mo -

-

-

R I lett acc Re in ape fin l’ef

lisi do

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