Publication: Analysis of testing at high strain rates using FEM
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Publication date
2020-03
Defense date
2020-03-12
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Abstract
The use of composite materials in aviation is increasing every year. They offer huge
advantages in terms of performance and weight with respect to more common materials
such as aluminum. However, the sector of aviation is both very conservative and progressive
at the same time. They invest a lot of time and money in developing new, more
efficient ways of operating, but also take a lot of time to introduce these improvements
into the market. This is, of course, due to safety reasons. A fatal error taking place during
flight can be catastrophic.
For this reason it is important to perform thorough tests in new materials introduced.
The simulation using a FEM software of a SHPB experiment is a great way of testing the
materials at the high strain rates it could encounter during operation. Therefore, seeing
that the proposed material passes the test satisfactorily, its introduction into the industry
can be approved.
The validation of these experiments using FEM software is reached when the results
obtained match the characteristics of the materials tested, which are already known. This
has great value for the industry as these simulations allow to test a wide variety of materials
in many different configurations and could help reduce time and cost.
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Keywords
FEM, Split Hopkinson Pressure Bar, SHPB, Composite materials, High strain rate, Unidirectional CRFP, Aviation