158
8 Development of novel sandwich panel joints
Modelling database
 Adhesive material model
Scotch9323
 Detailed and Solid core model
ABS 5035-A4
 Face sheet material model
ABS 5047-02
ABS 5047-08
Hourglass
28.7g
2. Definition of model
framework
 Detailed model
 Explicit solver
1. Problem analysis
 Prediction of
catastrophic failure
 2-4h computational time
 Three relevant
mechancial effects
3. Model development
 No investigation, just
implementation
 All material properties
adopted from modelling
database
4. Application of virtual
test method
 Investigation of three
insert designs
Reference
Undercut
22.0g
32.6g
Figure 126 Application of virtual test for design study on partially potted inserts
The simulation results in terms of force displacement curves are given in Figure 127 a),
while Figure 127 b) depicts the weight specific force displacement relationship based on
the estimated weight of each design alternative. Both illustrations present the same
trends. The configurations with increased potting radius achieve comparable strengths,
which are considerably higher if compared to the reference. This strength advantage is
reduced when considering the weight specific strength, while in this case the Hourglass
configuration is superior to the Undercut. The force displacement results of the three
alternatives indicate that the Hourglass and Undercut design exhibit a consistent failure
mode which is unlike the failure mode of the Reference.
a)
b)
Figure 127 Virtual testing results; a) force-displacement curve and b) weight specific force-displacement curve