Damage at high strain rates in semi-crystalline polymers

Romain Balieu (1) , Franck Lauro (2) , Bruno Bennani (2) , Grégory Haugou (2) , Fahmi Chaari (2) , Tsukatada Matsumoto (3) , Ernesto Mottola (3)

1 KTH - KTH Royal Institute of Technology [Stockholm]
2 LAMIH - Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201
3 Toyota Motor Europe (BELGIUM)

A specific damage characterization method using Digital Image Correlation for semi-crystalline polymers is proposed for a wide range of strain rates. This damage measurement is an extension of the SEĖ method [16] which was developed to characterize the behaviour laws at constant strain rates of polymeric materials. This procedure is compared to the well-known damage characterization by loss of stiffness technique under quasi-static loading. In addition, an in-situ tensile test, carried out in a microtomograph, is used to observe the cavitation phenomenon in real time. The different ways used to evaluate the damage evolution are compared and the proposed technique is also suitable for measuring the ductile damage observed in semi-crystalline polymers under dynamic loading.

Mots clés: "Damage"; "Digital image correlation"; "Microtomograph"; "Semi-crystalline polymers"; "High strain rates"

Domaines: Mécanique [physics.med-ph]

Romain Balieu, Franck Lauro, Bruno Bennani, Grégory Haugou, Fahmi Chaari, et al.. Damage at high strain rates in semi-crystalline polymers. International Journal of Impact Engineering, 2015, 76, pp.1-8. ⟨10.1016/j.ijimpeng.2014.08.013⟩. ⟨hal-03450984⟩