Failure analysis of variable stiffness composite plates using continuum damage mechanics models

Failure analysis of variable stiffness composite plates using continuum damage mechanics models Variable stiffness composites constitute a novel approach in the area of fibre-reinforced materials, where the unidirectionality of fibres is further utilized by following curved paths. However, their design and analysis pose a few challenges which have to be overcome for them to be widely used in industrial applications. One issue of particular importance is the uncertainty associated with the failure behaviour, since these laminates have a non-uniform in-plane stiffness distribution that might result in large in-plane stress gradients. These gradients, together with the existence of varying orientations within a ply, lead to the combination of longitudinal, transverse and shear stresses that may trigger different failure modes. This paper presents the analysis until failure of variable stiffness plates considering a continuum damage mechanics model. Finite element simulations are carried out on various stacking sequences where the mechanical behavior under high loading is investigated using three-dimensional elements. The response of non-conventional fibre orientations is compared with that of straight fibre laminates, while simulations both accounting and neglecting damage are also considered. The results show that the presence of damage remarkably affects the mechanical behavior of the simulated sequences, with increments in the obtained deflection between 40% and 65% as compared with undamaged models. Variations in the relative performance between non-conventional and traditional laminates were also observed in terms of the reported deflection and the damage onset load. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Composite Structures Elsevier

Failure analysis of variable stiffness composite plates using continuum damage mechanics models

Loading next page...
 
/lp/elsevier/failure-analysis-of-variable-stiffness-composite-plates-using-0wTRgfgChQ
Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0263-8223
eISSN
1879-1085
D.O.I.
10.1016/j.compstruct.2017.10.065
Publisher site
See Article on Publisher Site

Abstract

Variable stiffness composites constitute a novel approach in the area of fibre-reinforced materials, where the unidirectionality of fibres is further utilized by following curved paths. However, their design and analysis pose a few challenges which have to be overcome for them to be widely used in industrial applications. One issue of particular importance is the uncertainty associated with the failure behaviour, since these laminates have a non-uniform in-plane stiffness distribution that might result in large in-plane stress gradients. These gradients, together with the existence of varying orientations within a ply, lead to the combination of longitudinal, transverse and shear stresses that may trigger different failure modes. This paper presents the analysis until failure of variable stiffness plates considering a continuum damage mechanics model. Finite element simulations are carried out on various stacking sequences where the mechanical behavior under high loading is investigated using three-dimensional elements. The response of non-conventional fibre orientations is compared with that of straight fibre laminates, while simulations both accounting and neglecting damage are also considered. The results show that the presence of damage remarkably affects the mechanical behavior of the simulated sequences, with increments in the obtained deflection between 40% and 65% as compared with undamaged models. Variations in the relative performance between non-conventional and traditional laminates were also observed in terms of the reported deflection and the damage onset load.

Journal

Composite StructuresElsevier

Published: Jan 15, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off