Some crack problems in composite material
This report covers the parametric study of the stress intensity factor of cracks in composite materials. The analysis of crack in composites was performed using Abaqus Computer Aided Engineering (CAE) software. It involved modelling a 2‐dimensional composite with a notch crack, where the...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2011
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/45978 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | This report covers the parametric study of the stress intensity factor of cracks in
composite materials.
The analysis of crack in composites was performed using Abaqus Computer Aided
Engineering (CAE) software. It involved modelling a 2‐dimensional composite with a
notch crack, where the stress intensity factors at the crack tip K1 and K2 were
recorded. Different crack locations were studied and experimental analysis has
shown that stress intensity factor increases if the crack appears nearer to the
surface of the plane.
The stress intensity is also greatly affected by the ratio of the modulus of the
constituent materials. Analysis has shown that as the crack approaches the
constituent material with lower modulus, the stress intensity is bound to increase.
The reverse is true for material with higher modulus.
A separate analysis was performed to learn the behaviour of the stress intensity
factor at the crack tip when a specimen is coated with a varying thickness of coating
material. Results have shown that as the thickness of the coating material increases,
the stress intensity factor decreases. |
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