54
4 Mechanical characterization on constituent level
material properties are summarized in Table 12 while the stress-strain relationships of
the applied material models are given in Figure 43.
Figure 42 Illustration of the multi layer resin corner approach for both investigated geometries
[See17]
Table 12 Calibrated material properties for multi layer resin corner approach
Nomex paper
Phenolic resin
E1
3000 MPa
δ1t
90 MPa
Ephen
4800 MPa
E2
1700 MPa
δ1c
45 MPa
ηphen
0.389
G12
1200 MPa
δ 2t
60 MPa
δphen,t
106 MPa
ηorth
0.2
δ 2c
30 MPa
δphen,c
155 MPa
tsingleNomex
0.051 mm
δ 12
55 MPa
tphen
0.003 mm
tdoubleNomex 0.104 mm
ρ
0.72 g/cc
ρphen
1.342 g/cc
Figure 43 Stress strain relationships of implemented material models for ML resin corner approach a) Nomex paper and b) phenolic resin