Platen parallelism significance and control in single fiber transverse compression tests
Résumé
Transverse compression tests are the established way to identify the transverse mechanical properties of single
fibers. However, to the authors knowledge, the influence of an angle between the two compression platens has
never been studied or quantified. In this paper, the importance of platen parallelism is studied for the first time
through: numerical simulation and experimental investigation. A sensitivity analysis complements these studies
by highlighting the importance of contact geometry in the analytical model, used in the inverse identification of
the fiber’s apparent transverse elastic modulus ET . Experimental results show that a misalignment of 1◦ between
the platens produces a variation of more than 35% on the identified ET , compared to a compression with parallel
platens. Given the importance of platen misalignment angle an experimental setup and protocol are designed in
order to maintain this angle below 0.1◦, thus keeping the error on ET below 5%
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