Composite Laminates Compression After Impact Testing
While having excellent mechanical properties (i.e. strength and stiffness) with a lower weight, compared to their metallic counterparts, composites can exhibit poor tolerance to damage caused by impact. The types of damage can be complex, irregular in shape, and may affect all layers of the structure. Additionally, they may be barely visible or hidden from view.
Low-energy impacts can be considered the most dangerous since the damage they cause may go unnoticed during routine visual inspections of the impacted surface. Impact energies that cause visible damage to the component may be significantly higher than those that have a significant effect on the mechanical properties.
The study of damage tolerance of laminates and the effect of different impact energies on residual strength is crucial.
With the Instron® 9450 impact droptower, the damage tolerance of laminates can be studied, and the effect of different impact energies on the residual strength can be determined. Performing a CAI test on components shows that materials respond differently to different impact conditions, and enable engineers to design and test composite products more cost effectively.
When configured with an instrumented tup, data acquisition, and software, the force signal from each impact can be captured and analyzed, helping engineers improve their knowledge about the material’s performance. The addition of a special temperature chamber allows the user to investigate how the same material may react in high-temperature environments up to 300°C.
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