Mathieu Badard

Mathieu Badard, a doctor in material science since 2015, has worked on many research projects that sought to improve polymer and composite properties. His work focused on the understanding of microstructure, trying different ways to modify the structure and characterize it to establish a structure-property correlation. With this scientific approach, Badard has worked on cable structure, electromagnetic acoustic composites and rubber crystallization for thermal applications. Badard currently works for the Acoem-Metravib group as an expert in material (polymers) characterization with a DMA, performing measurements, training customers on DMA and supporting them.

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Presentation

New methodology to determine fatigue crack growth critical energies

The appearance and propagation of cracks are major problems for the tire’s lifespan. Fatigue crack growth testing methods make possible the accurate measurement of cracks in a rubber compound specimen under controlled dynamic excitation. Nevertheless, performing the test with adequate energy to obtain a relevant characterization of a specific material may be tough and time-consuming. Test optimization is possible when determining the lowest tearing energy (T0) generating a crack growth and the highest (critical) tearing energy (Tc) beyond which the specimen is rapidly totally cut. This presentation highlights a new methodology to determine both T0 and Tc.