Multiscale Approach to Damage Analysis of Laminated Composite Structures

Ivančević, Darko and Smojver, Ivica (2012) Multiscale Approach to Damage Analysis of Laminated Composite Structures. = Multiscale Approach to Damage Analysis of Laminated Composite Structures. In: 2012 3DS SIMULIA Community Conference, 15.-17.05.2012., Providence, SAD.

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The presented work depicts results of a two-scale approach to the problem of damage and failure prediction on laminated composite structures. Modeling on the micro-level has enabled insight into the underlying physical processes which lead to homogenized properties of the macro-scale material. In this work, micromechanical analysis has been performed by application of the High Fidelity Generalized Method of Cells theory (HFGMC), which is implemented into Abaqus via user material subroutine VUMAT. As result of the HFGMC analysis, micromechanical strain concentration tensors, which relate the strain tensor on the macro-level to the strain tensors of each subcell, have been computed. This enabled calculation of the stress field within the unit cell, based on the constitutive behavior of each subcell. The first stage of modeling damage prediction in composite structures is application of failure criteria in order to account for damage initiation. This work shows results of the application of the most commonly used micromechanical failure criteria applied for unidirectional composites. The micromechanical failure criteria have been compared to the failure criteria applied at lamina (macro) level. The structural model at the macro-scale is a stiffened composite panel, commonly used in aircraft structures.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Multiscale analysis, Composite materials, Abaqus/Explicit, High Fidelity Generalized Method of Cells
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
TECHNICAL SCIENCE > Aviation, rocket and space technology
Divisions: 1300 Department of Aeronautical Engineering > 1310 Chair of Aerodynamics
Date Deposited: 22 Sep 2016 12:54
Last Modified: 22 Sep 2016 12:54

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