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Open AccessArticle

Numerical–Experimental Correlation of Impact-Induced Damages in CFRP Laminates

1
Department of Engineering, University of Campania Luigi Vanvitelli, via Roma 29, 81031 Aversa, Italy
2
C.I.R.A.—Italian Aerospace Research Centre, via Maiorise snc, 81043 Capua, Italy
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(11), 2372; https://doi.org/10.3390/app9112372
Received: 8 April 2019 / Revised: 4 June 2019 / Accepted: 5 June 2019 / Published: 11 June 2019
(This article belongs to the Special Issue Fatigue and Fracture of Non-metallic Materials and Structures)
Composite laminates are characterized by high mechanical in-plane properties and poor out-of-plane characteristics. This issue becomes even more relevant when dealing with impact phenomena occurring in the transverse direction. In aeronautics, Low Velocity Impacts (LVIs) may occur during the service life of the aircraft. LVI may produce damage inside the laminate, which are not easily detectable and can seriously degrade the mechanical properties of the structure. In this paper, a numerical-experimental investigation is carried out, in order to study the mechanical behavior of rectangular laminated specimens subjected to low velocity impacts. The numerical model that best represents the impact phenomenon has been chosen by numerical–analytical investigations. A user defined material model (VUMAT) has been developed in Abaqus/Explicit environment to simulate the composite intra-laminar damage behavior in solid elements. The analyses results were compared to experimental test data on a laminated specimen, performed according to ASTM D7136 standard, in order to verify the robustness of the adopted numerical model and the influence of modeling parameters on the accuracy of numerical results. View Full-Text
Keywords: CFRP; Low Velocity Impacts; Cohesive Zone Model (CZM); Finite Element Analysis (FEA); VUMAT; inter-laminar damage; intra-laminar damage CFRP; Low Velocity Impacts; Cohesive Zone Model (CZM); Finite Element Analysis (FEA); VUMAT; inter-laminar damage; intra-laminar damage
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MDPI and ACS Style

Sellitto, A.; Saputo, S.; Di Caprio, F.; Riccio, A.; Russo, A.; Acanfora, V. Numerical–Experimental Correlation of Impact-Induced Damages in CFRP Laminates. Appl. Sci. 2019, 9, 2372.

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