ISO 12135:2021
[Current]
Metallic materials — Unified method of test for the determination of quasistatic fracture toughness
...1 (see Figure 10), and where:
p
=
+
3 667 2 199 0 437
00
2
,, ,
a
W
a
W
(32)
NOTE 3 The relationship for g
1
(a
0
/W) is given in Annex D...