Peel Strength And Other Related Mechanical Properties Of Composite Sandwich Structures
An experimental and numerical investigation of the peel strength and other mechanical properties of composite sandwich structures were conducted. The composite sandwich structure consists of carbon fibre and aramid fibre as facings with either a honeycomb or foam core. The peel strength of both...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2002
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| Online Access: | http://psasir.upm.edu.my/id/eprint/12136/1/FK_2002_88.pdf http://psasir.upm.edu.my/id/eprint/12136/ |
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| Summary: | An experimental and numerical investigation of the peel strength and other
mechanical properties of composite sandwich structures were conducted. The
composite sandwich structure consists of carbon fibre and aramid fibre as facings with
either a honeycomb or foam core.
The peel strength of both types of composite sandwich structure for use at the flap and
aileron was studied. The peel tests showed that the composite sandwich structure
with a honeycomb core is stronger than the composite sandwich structure with a foam
core. The modes of failures or possible path of crack propagation were also studied.
The most critical modes of failure were the adhesion failure to the facing and the
adhesion failure to the core.
A peel model ling was developed using interface elements and the effect of various
modes of failures on the strain energy release rate was evaluated by finite element
analysis using LUSAS, a commercial finite element code. A numerical scheme called virtual crack closure scheme was used to calculate the strain energy release rate at the
peel front in a peel test specimen.
To complement the results on the peel strength, investigations on other related
mechanical properties were conducted and comparisons were made with previous
works in the reference. The important parameters studied were bending, shear and
compression as all of them has a static condition. The results show that experimental,
numerical and validations with parametric studies agree well . The tensile test was
also conducted experimentally to obtain modulus of elasticity that was required in the
computational calculations. |
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