
30 Eecve Medium Approach
Table 2.1
Piezoelectric phase
p
d
15
=
p
d
24
p
d
31
=
p
d
32
p
d
33
p
s
11
=
p
s
22
p
s
12
=
p
s
21
p
s
13
=
p
s
23
=
p
s
31
=
p
s
32
p
s
33
p
s
44
=
p
s
55
p
s
66
= 2 (
p
s
11
+
p
s
12
)
Magnetostrictive phase
m
q
15
=
m
q
24
m
q
31
=
m
q
32
m
q
33
m
s
11
=
m
s
22
=
m
s
33
m
s
12
=
m
s
21
=
m
s
13
=
m
s
23
=
m
s
31
=
m
s
32
m
s
44
=
m
s
55
=
m
s
66
Homogeneous material
D
15
= d
24
d
31
= d
32
d
33
q
15