Publications by authors named "L Laiarinandrasana"
The quantification and modeling of gel fracture under large strain and dissipative conditions is still an open issue. In this study, a novel method for investigating the mechanical behavior of gels under highly deformed states, specifically in the vicinity of the crack tip, was developed to gain insights into fracture processes. Shear wave elastography, originally developed for the biomedical community, is employed as a powerful tool to quantitatively map the local elasticity of model gels.
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- The study investigates how the mechanical properties of neoprene rubbers change over time under different ageing temperatures (70 °C, 80 °C, and 90 °C), revealing that Young's modulus increases while the bulk modulus stays constant.
- It highlights the decrease in the Poisson's ratio and elongation at break with ageing, with similar activation energy (~80 kJ/mol) indicating Arrhenius-like behavior, which is often overlooked in previous research.
- The findings suggest that the evolution of crosslink density during ageing significantly impacts mechanical properties, allowing lifetime predictions of elastomers through simple hardness shore measurements based on elongation at break.