Delamination Initiation in Fully Clamped Rectangular CFRP Laminates Subjected to Out-of-Plane Quasi-static Indentation Loading

• DOI: 10.2139/ssrn.4194103
• Publication Date: 2022-08-31T15:36:04Z
• Authors: Lubin Huo; René Alderliesten; Mojtaba Sadighi
• Keywords: Delamination; Indentation

To further investigate the effects of in-plane and out-of-plane stresses on delamination initiation for FRP laminates under loading, this paper reports a joint experimental numerical study, in which fully clamped multidirectional CFRP composite panels were subjected to quasi-static indentations. The results show that combination shear stress tensile determined delamination, while influence compressive can be neglected. For purpose understanding underlying causes stresses, concise analytical model was developed, validated against results. Furthermore, as key take-away, study reveals common impact tests at panel’s geometric centre may not resemble sufficient similitude with stiffened where panel flexure is suppressed by various geometrical stiffening concepts.