5.3 Additional test methods
91
Figure 68 Comparison of simulation and experiment; a) in terms of force strain relationship and
b) in terms of failure mode
5.3 Additional test methods
There are additional tests on structural element level, which may be considered in virtual
testing frameworks for sandwich structures. The subsequently introduced test setups
are not described in detail in the present thesis, since they have proven to be less relevant with regards to the investigated joint configurations. However, due to their general
relevance in sandwich construction they are briefly outlined.
Uniaxial testing of sandwich panels
Uniaxial tests on sandwich panels can be an alternative for determining the face sheet
properties, which, in the present thesis, was done based on bending tests and tensile
tests of the face sheet prepregs. The standardized edgewise compression test [AST99]
enables to directly determine the in-plane uniaxial compressive properties of the panel.
Depending on the specimen dimension and composition, the test can yield diverse failure modes such as compressive face sheet rupture, face sheet wrinkling and dimpling
Shear damage
100%
0%
y
x
z
Configuration
S10-010
b)
a)