Issue 15

I. S. Raju et

alii, Frattura ed

Integrità Struttu

rale, 15 (2011)

35-49; DOI: 10

.3221/IGF-ESIS.1

5.05

(a) Va

rious defects w

ith the left tip

fixed at Loca

tion -2.

(b) Left Fracture mec

tip. hanics respons

. ocation -2.

(c) Right tip t tip fixed at L

Figure 17 :

e for the left s

ubstrate defec

: Effect of var ud (i.e., defe ure. e clouds was r. For the co gher G T valu ere the mater efects yield ne-strain ana

ious variables ct initiation s determined ating/substr es. Because ial propertie higher G T va lysis (i.e., sim

on defect driv ite) was dete [1, 6] throu ate transition a sharp interf s were transi lues. For 3D ulating a th

ing force. rmined by st gh finite elem zone, the in ace does not tioned from effects, par rough defect

Figure 18 the green clo ter of this fig in the orang in this pape nd yielded hi ze zones wh size, larger d ted using pla

Th like Th ana coa con low G T

e effect of th the one sho e effect of th lyses like tho ting/substra ducted using er G T values values than

e variable in wn in the cen e variables se presented te interface a different si . For defect those compu

udying the ph ent and fra itial analyses exist in reali substrate to t-through de ). These res

otomicrogra cture mecha assumed a sh ty, analyses w coating, yield fects yield lo ults demonst

phs nics arp ere ing wer rate

47