Simulation of Low Velocity Impact Induced Inter- and Intra-Laminar Damage of Composite Beams Based on XFEM
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Simulation of Low Velocity Impact Induced Interand Intra-Laminar Damage of Composite Beams Based on XFEM Wei Sun 1 & Zhidong Guan 1 & Zengshan Li 1
Received: 13 February 2017 / Accepted: 15 February 2017 # Springer Science+Business Media Dordrecht 2017
Abstract In this paper, the Inter-Fiber Fracture (IFF) criterion of Puck failure theory based on the eXtended Finite Element Method (XFEM) was implemented in ABAQUS code to predict the intra-laminar crack initiation of unidirectional (UD) composite laminate. The transverse crack path in the matrix can be simulated accurately by the presented method. After the crack initiation, the propagation of the crack is simulated by Cohesive Zoom Model (CZM), in which the displacement discontinuities and stress concentration caused by matrix crack is introduced into the finite element (FE) model. Combined with the usage of the enriched element interface, which can be used to simulate the inter-laminar delamination crack, the Low Velocity Impact (LVI) induced damage of UD composite laminate beam with a typical stacking of composite laminates [05/903]S is studied. A complete crack initiation and propagation process was simulated and the numerical results obtained by the XFEM are consistent with the experimental results. Keywords Inter-fiber fracture . eXtended finite element method . Low velocity impact . Matrix crack . Delamination crack
1 Introduction Due to the lightweight, high strength, excellent anti-fatigue properties and perfectly designed ability, composite material was widely used in the aerospace engineering. However, delamination damage of unidirectional (UD) fiber reinforced composite laminates can significantly reduce the compressive properties of the composite structure cc (LVI). The damage of composite laminates under LVI start from the matrix transverse cracks due to shear or bending tensile stress [1]. When the intra-laminar matrix crack grows to the interface between layers,
* Zhidong Guan [email protected]
1
School of Aeronautic Science and Engineering, Beihang University, Beijing, China
Appl Compos Mater
the crack propagation direction changes to be parallel to the interface, and the interface delamination occurs. In order to accurately predict the impact delamination by Finite Element Method (FEM), Zhang [2] and Gigliotti [3] used Hashin failure criterion [4] and Mesh Superposition Technique (MST) for matrix failure to simulate the intra-laminar failure, respectively. The failure theory of Zinoview [5], Bogetti [6], Puck [7], Cuntze [8], and Tsai [9] were recommended by the World-Wide Failure Exercise (WWFE) to predict the initial damage of FRP laminates, because of their high prediction accuracy. When the impact energy is lower than knee point energy [10], the fiber failure does not occur, without considering the fiber failure (FF). The Inter-fiber fracture (IFF) process can be divided into two steps: damage initiation and damage evolution. Being combination of the initial failure criterion and the Continuum Damage Mechanics (CDM), the IFF failure of
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