Page 146 - Plastics Engineering
P. 146
Mechanical Behaviour of Plastics 129
la
(a) Finite width plate (b) Double edge crack
t"
to
(c) Single edge crack
1.
(d) Internal penny crack
IL
02
4
20
15
01
10
(1) Three point bending
(e) Elliptical surface crack
Fa. 2.67 Mal crack configurations
(c) Single edge cracks in a plate of finite width
K = ~(ZU)''~ { 1.12 - 0.23 (5> + 10.6 (;)* - 21.7 ( ;)3
+ 30.4 = ( G)4} (2.103)
Note: in most cases (i) Y = 1.12.
is
so
very
smd
