Issue 14

B. Lo

bato da Silva et

alii, Frattura ed

Integrità Struttu ero,  m S   n, the Eq. 9 a

rale, 14 (2010)  0 rt  , the c ssumes the f

17-26; DOI: 10

.3221/IGF-ESIS.

14.02

Ad of

mitting that superior orde

the argument r converge q

of the expo uickly to zero

nential funct . In this spec

ion tend to z ific conditio

onsequence ollowing form

is that the te :

rms

  

  



(10)

S

1

  

 



m

a

a

r

S

rt

depending on

verify with e b. 1.

α, the wides

will

sion, one can ted in the Ta

Sta des

rting from th cribe some m

is last expres odels presen

pread model

asiness that

the value of

Hypothes

es

Resulti

ng Equation

Model

Equation

a 

m   

1

Goodman

(11)

1  

S

S

rt

ar

m       rt S 

2



m       y S 

a  

f

 



Gerber

(12)

m

1



S

S

rt

ar

S

R   

  

1



1 2

 , f R  

 , m S    rt

R 

  

  

1

ln



rt

SWT

(13)

a S  



2

2





ar

2

m

S

R

  

  

1



R  

  

1



 , f R  

 ,

rt m S 

ln

 



rt

Walker

(14)

a S  



 

2







ar

2

m

Table 1

: Particular sol

spread Kwofi

e model.

utions of wide

M A Ma T yiel

TERIAL AN

D METHOD S

terial

nox ical and

, a stainless i high mechan strength, S rt ,

he mate martens strength d strength, S y

rial used in t itic. This typ and that res ) of the sam

he developm e of steel is ist to the cor ple A and sam

ent of this r used in the rosion. The ple B are sh

esearch was production o mechanical p owed in Tab

the ASTM A f structural c roperties (Yo . 2.

743 CA6NM omponents ung modulu

alloy steel that request s, E , tensile

E (

S rt

S y

Sam A B

ple

GPa)

(MPa)

(

and B. MPa) 37 65

1 1

98 98

8 9

90 18

6 6

al properties

Table

2 : Mechanic

of sample A

Spe Th 466 for

cimen design e specimens -96 [8]. The samples A a

E n 1

le B starting imens were u tively data.

from ASTM sed: specime

signed accor ain dimensi imen 2 for sa

ding to AST ons. In this w mple B, Fig

of the samp se standards nd B, Fig. 1 a

M E 606-04 ork three d 2. Tab. 3 sho

le A were de specify the m nd only spec

[7] and samp ifferent spec ws the respec

Figure 1 : Spe

cimen 1 for sa

mple A and B .

19