Permanent indentation characterization for low-velocity impact modelling using three-point bending test

Natthawat Hongkarnjanakul (1) , Samuel Rivallant (1) , Christophe Bouvet (1) , Arturo Miranda (1)

1 ICA - Institut Clément Ader

This paper deals with the origin of permanent indentation in composite laminates subjected to low-velocity impact. The three-point bending test is used to exhibit a non-closure of matrix crack which is assumed as a cause of permanent indentation. According to the observation at microscopic level, this non-closure of crack is produced by the blocking of debris inside matrix cracking and the formation of cusps where mixed-mode delamination occurs. A simple physicallybased law of permanent indentation, ‘‘pseudo-plasticity’’, is proposed. This law is qualitatively tested by three-point bending finite element model and is lastly applied in low-velocity impact finite element model in order to predict the permanent indentation. A comparison between low-velocity impact experiments and simulations is presented.

Mots clés: Permanent indentation; Dent depth; Impact behaviour; Damage mechanics; Damage tolerance; Three-point bending test

Domaines: Autre

Natthawat Hongkarnjanakul, Samuel Rivallant, Christophe Bouvet, Arturo Miranda. Permanent indentation characterization for low-velocity impact modelling using three-point bending test. Journal of Composite Materials, 2014, 48 (20), pp.2441-2454. ⟨10.1177/0021998313499197⟩. ⟨hal-01851599⟩