Abstract
Conventional thermosetting composites laminates have high specific in-plane properties but low
damage tolerance. An approach to enhance damage tolerance in composite laminates is to use towlevel
fibre hybridization with thermoplastic fibres. This paper aims to investigate post-cure thermallyinduced
residual micro-stress fields within the matrix and at the fibre-matrix interface in tow-level fibre
hybrid laminates. Three-phase 3D RUCs and RVEs are developed to study the effect of fibre volume
fractions, fibre types, fibre distribution on thermally induced residual micro-stress fields. Matrix von
Mises stress and interfacial normal and shear stresses are analysed to study matrix and fibre-matrix
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interface debonding initiation regions. It is shown that the addition of a second fibre type can influence
drastically thermally induced residual stress distribution. Keyword: effective coefficient of thermal
expansion, residual stress, hybrid composite, numerical method, representative volume element
damage tolerance. An approach to enhance damage tolerance in composite laminates is to use towlevel
fibre hybridization with thermoplastic fibres. This paper aims to investigate post-cure thermallyinduced
residual micro-stress fields within the matrix and at the fibre-matrix interface in tow-level fibre
hybrid laminates. Three-phase 3D RUCs and RVEs are developed to study the effect of fibre volume
fractions, fibre types, fibre distribution on thermally induced residual micro-stress fields. Matrix von
Mises stress and interfacial normal and shear stresses are analysed to study matrix and fibre-matrix
156
interface debonding initiation regions. It is shown that the addition of a second fibre type can influence
drastically thermally induced residual stress distribution. Keyword: effective coefficient of thermal
expansion, residual stress, hybrid composite, numerical method, representative volume element
| Original language | English |
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| Publication status | Published - 21 Jul 2022 |