Modelling of stiffness degradation due to cracking in laminates subjected to multi-axial loading | Zendy

Maria Kashtalyan | Zendy; Constantinos Soutis | Zendy

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Modelling of stiffness degradation due to cracking in laminates subjected to multi-axial loading

Author(s) -

Maria Kashtalyan,

Constantinos Soutis

Publication year - 2016

Publication title -

philosophical transactions of the royal society a mathematical physical and engineering sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.074

H-Index - 169

eISSN - 1471-2962

pISSN - 1364-503X

DOI - 10.1098/rsta.2016.0017

Subject(s) - materials science , stiffness , composite material , epoxy , composite laminates , cracking , transverse plane , shear (geology) , residual , delamination (geology) , composite number , structural engineering , computer science , geology , paleontology , subduction , algorithm , engineering , tectonics

The paper presents an analytical approach to predicting the effect of intra- and interlaminar cracking on residual stiffness properties of the laminate, which can be used in the post-initial failure analysis, taking full account of damage mode interaction. The approach is based on a two-dimensional shear lag stress analysis and the equivalent constraint model of the laminate with multiple damaged plies. The application of the approach to predicting degraded stiffness properties of multidirectional laminates under multi-axial loading is demonstrated on cross-ply glass/epoxy and carbon/epoxy laminates with transverse and longitudinal matrix cracks and crack-induced transverse and longitudinal delaminations. This article is part of the themed issue ‘Multiscale modelling of the structural integrity of composite materials’.

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