Assessment of two methods for the accurate prediction of transverse stress distributions in laminates
Journal article, 2016

A major challenge for crash failure analysis of laminates is to find a modelling approach which is both sufficiently accurate and computationally efficient. We suggest to adopt a traditional single-layer shell formulation due to its cost effectiveness. In this contribution, we have therefore investigated the potential of two different concepts for obtaining better prediction of the through-the-thickness distribution of the transverse stresses; a crucial issue since the accuracy for a single-layer approach in this respect is normally low. The first concept is a multiscale approach in which the macroscopic shell model is concurrently coupled to a mesoscopic 3D element representation of the heterogeneous material structure on the laminate level. The second concept is a stress recovery method based on integration of the 3D equilibrium equations, with additional smoothing of the in-plane stresses. The main conclusion drawn from the investigations is that, the adopted multiscale concept, although similar to what has been previously reported in the literature, is not a suitable approach to increase the level of accuracy of the predicted transverse stress distributions. However, we conclude that the proposed stress recovery method very well captures the through-the-thickness stress variations in our presented examples.

Shell to solid bridging

Transverse stress prediction

Stress recovery in shells


Johannes Främby

Chalmers, Applied Mechanics, Material and Computational Mechanics

Jim Brouzoulis

Chalmers, Applied Mechanics, Material and Computational Mechanics

Martin Fagerström

Chalmers, Applied Mechanics, Material and Computational Mechanics

Composite Structures

0263-8223 (ISSN)

Vol. 140 602-611

Areas of Advance

Materials Science

Subject Categories

Composite Science and Engineering



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