a	crack length
a eq	equivalent crack length
a 0	initial crack length
h	half thickness of specimen
n	correction parameter
A	extensional stiffness matrix
A ij	component of the extensional stiffness matrix
A 1	correction parameter
B	coupling stiffness matrix
B	specimen width
Bij	component of the coupling stiffness matrix
Bt	non-dimensional parameter
C	compliance
C0	initial compliance
D	bending stiffness matrix
Dij	component of the bending stiffness matrix
Dc	non-dimensional parameter
E1	longitudinal Young’s modulus
E2	transversal Young’s modulus
Ef	flexural modulus
G12	shear modulus
GIC	critical strain energy release rate
L	specimen length
M	moment vector
N	force vector
P	applied load
ν12	Poisson’s ratio
δ	displacement
Δ	correction parameter
Γ	correction parameter
List of acronyms
AE	acoustic emission
BE	bending-extension coupled specimen
BT	bending-twisting coupled specimen
CBBM	Compliance-Based Beam Method
DCB	Double Cantilever Beam
MCC	Modified Compliance Calibration
CCM	Compliance Calibration Method
MBT	Modified Beam Theory
SEM	scanning electron microscope