Numerical prediction of delamination onset in carbon/epoxy composites drilling |
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Authors: | LMP Durão MFSF de Moura |
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Affiliation: | a Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, R. Dr. António Bernardino de Almeida, 431, 4200 Porto, Portugal b Departamento de Engenharia Mecânica e Gestão Industrial, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal |
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Abstract: | Despite the fact that their physical properties make them an attractive family of materials, composites machining can cause several damage modes such as delamination, fibre pull-out, thermal degradation, and others. Minimization of axial thrust force during drilling reduces the probability of delamination onset, as it has been demonstrated by analytical models based on linear elastic fracture mechanics (LEFM).A finite element model considering solid elements of the ABAQUS® software library and interface elements including a cohesive damage model was developed in order to simulate thrust forces and delamination onset during drilling. Thrust force results for delamination onset are compared with existing analytical models. |
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Keywords: | Delamination Finite element Carbon fibre laminates |
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