Partition of mixed-mode fractures in 2D elastic orthotropic laminated beams under general loading.
In: Composite Structures, Jg. 149 (2016-08-01), S. 239-246
academicJournal
Zugriff:
An analytical method for partitioning mixed-mode fractures on rigid interfaces in orthotropic laminated double cantilever beams (DCBs) under through-thickness shear forces, in addition to bending moments and axial forces, is developed by extending recent work by the authors (Harvey et al., 2014). First, two pure through-thickness-shear-force modes (one pure mode I and one pure mode II) are discovered by extending the authors’ mixed-mode partition theory for Timoshenko beams. Partition of mixed-mode fractures under pure through-thickness shear forces is then achieved by using these two pure modes in conjunction with two thickness ratio-dependent correction factors: (1) a shear correction factor, and (2) a pure-mode-II energy release rate (ERR) correction factor. Both correction factors closely follow an elegant normal distribution around a symmetric DCB geometry. The principle of orthogonality between all pure mode I and all pure mode II fracture modes is then used to complete the mixed-mode fracture partition theory for a general loading condition, including bending moments, axial forces, and through-thickness shear forces. Excellent agreement is observed between the present analytical partition theory and numerical results from finite element method (FEM) simulations. [ABSTRACT FROM AUTHOR]
Titel: |
Partition of mixed-mode fractures in 2D elastic orthotropic laminated beams under general loading.
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Autor/in / Beteiligte Person: | Wood, J.D. ; Harvey, C.M. ; Wang, S. |
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Zeitschrift: | Composite Structures, Jg. 149 (2016-08-01), S. 239-246 |
Veröffentlichung: | 2016 |
Medientyp: | academicJournal |
ISSN: | 0263-8223 (print) |
DOI: | 10.1016/j.compstruct.2016.04.016 |
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