Details
| Original language | English |
|---|---|
| Pages (from-to) | 116-128 |
| Number of pages | 13 |
| Journal | Composite structures |
| Volume | 169 |
| Publication status | Published - 27 Oct 2016 |
Abstract
The compressive failure of multidirectional laminates can be considered as an interaction of four failure mechanisms: fiber kinking, fiber splitting, matrix cracking and delamination. The interaction of these four failure mechanisms is responsible for the macroscopically observed nonlinear behavior and ultimate failure of the structure. In this paper, a numerically efficient 3D Finite Element modeling approach is presented combining the benefits of homogenizing material models and micromechanical modeling strategies. The micro model is used to resolve the regions which are prone to fiber kinking. In all other regions, a single UD ply is considered as a continuum (i.e. in a homogenized way) and the material properties are represented using a transversely-isotropic constitutive model. At both scales, fully 3D elastic–plastic material models regarding nonlinearities and failure under multiaxial loading conditions are used. With this approach, the progressive failure of multidirectional laminates under compressive loading can be simulated in detail considering the complete kinking process and the progression of kink bands. The sequence and interaction of the different failure mechanisms is studied and discussed. In order to validate the numerical results, the nonlinear stress–strain response and ultimate failure stress of selected carbon epoxy laminate layups is predicted and compared with experimental results.
Keywords
- Compressive failure, Fiber kinking, Multidirectional laminates
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Engineering(all)
- Civil and Structural Engineering
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In: Composite structures, Vol. 169, 27.10.2016, p. 116-128.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Revealing complex aspects of compressive failure of polymer composites – Part II
T2 - Failure interactions in multidirectional laminates and validation
AU - Bishara, M.
AU - Vogler, M.
AU - Rolfes, R.
PY - 2016/10/27
Y1 - 2016/10/27
N2 - The compressive failure of multidirectional laminates can be considered as an interaction of four failure mechanisms: fiber kinking, fiber splitting, matrix cracking and delamination. The interaction of these four failure mechanisms is responsible for the macroscopically observed nonlinear behavior and ultimate failure of the structure. In this paper, a numerically efficient 3D Finite Element modeling approach is presented combining the benefits of homogenizing material models and micromechanical modeling strategies. The micro model is used to resolve the regions which are prone to fiber kinking. In all other regions, a single UD ply is considered as a continuum (i.e. in a homogenized way) and the material properties are represented using a transversely-isotropic constitutive model. At both scales, fully 3D elastic–plastic material models regarding nonlinearities and failure under multiaxial loading conditions are used. With this approach, the progressive failure of multidirectional laminates under compressive loading can be simulated in detail considering the complete kinking process and the progression of kink bands. The sequence and interaction of the different failure mechanisms is studied and discussed. In order to validate the numerical results, the nonlinear stress–strain response and ultimate failure stress of selected carbon epoxy laminate layups is predicted and compared with experimental results.
AB - The compressive failure of multidirectional laminates can be considered as an interaction of four failure mechanisms: fiber kinking, fiber splitting, matrix cracking and delamination. The interaction of these four failure mechanisms is responsible for the macroscopically observed nonlinear behavior and ultimate failure of the structure. In this paper, a numerically efficient 3D Finite Element modeling approach is presented combining the benefits of homogenizing material models and micromechanical modeling strategies. The micro model is used to resolve the regions which are prone to fiber kinking. In all other regions, a single UD ply is considered as a continuum (i.e. in a homogenized way) and the material properties are represented using a transversely-isotropic constitutive model. At both scales, fully 3D elastic–plastic material models regarding nonlinearities and failure under multiaxial loading conditions are used. With this approach, the progressive failure of multidirectional laminates under compressive loading can be simulated in detail considering the complete kinking process and the progression of kink bands. The sequence and interaction of the different failure mechanisms is studied and discussed. In order to validate the numerical results, the nonlinear stress–strain response and ultimate failure stress of selected carbon epoxy laminate layups is predicted and compared with experimental results.
KW - Compressive failure
KW - Fiber kinking
KW - Multidirectional laminates
UR - http://www.scopus.com/inward/record.url?scp=85006264124&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2016.10.091
DO - 10.1016/j.compstruct.2016.10.091
M3 - Article
AN - SCOPUS:85006264124
VL - 169
SP - 116
EP - 128
JO - Composite structures
JF - Composite structures
SN - 0263-8223
ER -