| Issue |
MATEC Web Conf.
Volume 304, 2019
9th EASN International Conference on “Innovation in Aviation & Space”
|
|
|---|---|---|
| Article Number | 01017 | |
| Number of page(s) | 6 | |
| Section | Aerostructures & Manufacturing | |
| DOI | https://doi.org/10.1051/matecconf/201930401017 | |
| Published online | 17 December 2019 | |
Numerical investigation of initial crack growth in composite laminates under tension
Central Aerohydrodynamic Institute,
Russian Federation
* Corresponding author: evgeny.dubovikov@tsagi.ru
The simplified automated strength model of a fragment of composite laminate at microlevel based on the finite elements (FE) method is offered. The model allows investigating the growth of microcracks which arise in the resin in monolayers, orthogonal to a direction of external tensile force. On the basis of automated strength FE model of a fragment of composite laminate and the method of reduction of stiffness characteristics of the resin, the scenario of growth of primary destructions at the microlevel is offered and proved. The scenario is confirmed with experimental investigations of composite samples under tension with registration of acoustic emission. In the work, the dependences of decrease of strength characteristics of composite laminates are obtained as functions of characteristics of resin, angles of orientation of monolayers, volume ratio of fibres in a composite laminate.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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